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Merge remote-tracking branch 'upstream/master' into trustless-remote-builder-simple

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This commit is contained in:
John Ericson 2021-01-22 16:22:00 +00:00
parent bd96403da6 b7bfc7ee52
commit 5738b08233
199 changed files with 5472 additions and 1751 deletions
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1
Makefile
View file

@ -10,7 +10,6 @@ makefiles = \
src/nix/local.mk \
src/resolve-system-dependencies/local.mk \
scripts/local.mk \
corepkgs/local.mk \
misc/bash/local.mk \
misc/systemd/local.mk \
misc/launchd/local.mk \

1
Makefile.config.in
View file

@ -10,7 +10,6 @@ EDITLINE_LIBS = @EDITLINE_LIBS@
ENABLE_S3 = @ENABLE_S3@
GTEST_LIBS = @GTEST_LIBS@
HAVE_SECCOMP = @HAVE_SECCOMP@
HAVE_SODIUM = @HAVE_SODIUM@
LDFLAGS = @LDFLAGS@
LIBARCHIVE_LIBS = @LIBARCHIVE_LIBS@
LIBBROTLI_LIBS = @LIBBROTLI_LIBS@

2
README.md
View file

@ -20,7 +20,7 @@ Information on additional installation methods is available on the [Nix download
## Building And Developing
See our [Hacking guide](https://hydra.nixos.org/job/nix/master/build.x86_64-linux/latest/download-by-type/doc/manual/hacking.html) in our manual for instruction on how to
See our [Hacking guide](https://hydra.nixos.org/job/nix/master/build.x86_64-linux/latest/download-by-type/doc/manual/contributing/hacking.html) in our manual for instruction on how to
build nix from source with nix-build or how to get a development environment.
## Additional Resources

10
configure.ac
View file

@ -174,9 +174,9 @@ PKG_CHECK_MODULES([OPENSSL], [libcrypto], [CXXFLAGS="$OPENSSL_CFLAGS $CXXFLAGS"]
# Look for libbz2, a required dependency.
AC_CHECK_LIB([bz2], [BZ2_bzWriteOpen], [true],
[AC_MSG_ERROR([Nix requires libbz2, which is part of bzip2. See https://web.archive.org/web/20180624184756/http://www.bzip.org/.])])
[AC_MSG_ERROR([Nix requires libbz2, which is part of bzip2. See https://sourceware.org/bzip2/.])])
AC_CHECK_HEADERS([bzlib.h], [true],
[AC_MSG_ERROR([Nix requires libbz2, which is part of bzip2. See https://web.archive.org/web/20180624184756/http://www.bzip.org/.])])
[AC_MSG_ERROR([Nix requires libbz2, which is part of bzip2. See https://sourceware.org/bzip2/.])])
# Checks for libarchive
PKG_CHECK_MODULES([LIBARCHIVE], [libarchive >= 3.1.2], [CXXFLAGS="$LIBARCHIVE_CFLAGS $CXXFLAGS"])
# Workaround until https://github.com/libarchive/libarchive/issues/1446 is fixed
@ -203,11 +203,7 @@ PKG_CHECK_MODULES([EDITLINE], [libeditline], [CXXFLAGS="$EDITLINE_CFLAGS $CXXFLA
])
# Look for libsodium, an optional dependency.
PKG_CHECK_MODULES([SODIUM], [libsodium],
[AC_DEFINE([HAVE_SODIUM], [1], [Whether to use libsodium for cryptography.])
CXXFLAGS="$SODIUM_CFLAGS $CXXFLAGS"
have_sodium=1], [have_sodium=])
AC_SUBST(HAVE_SODIUM, [$have_sodium])
PKG_CHECK_MODULES([SODIUM], [libsodium], [CXXFLAGS="$SODIUM_CFLAGS $CXXFLAGS"])
# Look for liblzma, a required dependency.
PKG_CHECK_MODULES([LIBLZMA], [liblzma], [CXXFLAGS="$LIBLZMA_CFLAGS $CXXFLAGS"])

4
corepkgs/local.mk
View file

@ -1,4 +0,0 @@
corepkgs_FILES = \
fetchurl.nix
$(foreach file,$(corepkgs_FILES),$(eval $(call install-data-in,$(d)/$(file),$(datadir)/nix/corepkgs)))

7
doc/manual/generate-manpage.nix
View file

@ -20,11 +20,6 @@ let
(attrNames def.commands))
+ "\n"
else "")
+ (if def.examples or [] != []
then
"# Examples\n\n"
+ concatStrings (map ({ description, command }: "${description}\n\n```console\n${command}\n```\n\n") def.examples)
else "")
+ (if def ? doc
then def.doc + "\n\n"
else "")
@ -43,7 +38,7 @@ let
if flag.category or "" != "config"
then
" - `--${longName}`"
+ (if flag ? shortName then " / `${flag.shortName}`" else "")
+ (if flag ? shortName then " / `-${flag.shortName}`" else "")
+ (if flag ? labels then " " + (concatStringsSep " " (map (s: "*${s}*") flag.labels)) else "")
+ " \n"
+ " " + flag.description + "\n\n"

4
doc/manual/src/advanced-topics/post-build-hook.md
View file

@ -53,7 +53,7 @@ set -f # disable globbing
export IFS=' '
echo "Signing paths" $OUT_PATHS
nix sign-paths --key-file /etc/nix/key.private $OUT_PATHS
nix store sign --key-file /etc/nix/key.private $OUT_PATHS
echo "Uploading paths" $OUT_PATHS
exec nix copy --to 's3://example-nix-cache' $OUT_PATHS
```
@ -63,7 +63,7 @@ exec nix copy --to 's3://example-nix-cache' $OUT_PATHS
> The `$OUT_PATHS` variable is a space-separated list of Nix store
> paths. In this case, we expect and want the shell to perform word
> splitting to make each output path its own argument to `nix
> sign-paths`. Nix guarantees the paths will not contain any spaces,
> store sign`. Nix guarantees the paths will not contain any spaces,
> however a store path might contain glob characters. The `set -f`
> disables globbing in the shell.

2
doc/manual/src/command-ref/nix-store.md
View file

@ -226,7 +226,7 @@ control what gets deleted and in what order:
or TiB units.
The behaviour of the collector is also influenced by the
`keep-outputs` and `keep-derivations` variables in the Nix
`keep-outputs` and `keep-derivations` settings in the Nix
configuration file.
By default, the collector prints the total number of freed bytes when it

2
doc/manual/src/installation/prerequisites-source.md
View file

@ -30,7 +30,7 @@
have bzip2 installed, including development headers and libraries.
If your distribution does not provide these, you can obtain bzip2
from
<https://web.archive.org/web/20180624184756/http://www.bzip.org/>.
<https://sourceware.org/bzip2/>.
- `liblzma`, which is provided by XZ Utils. If your distribution does
not provide this, you can get it from <https://tukaani.org/xz/>.

6
doc/manual/src/introduction.md
View file

@ -165,10 +165,10 @@ You’re then dropped into a shell where you can edit, build and test
the package:
```console
[nix-shell]$ tar xf $src
[nix-shell]$ unpackPhase
[nix-shell]$ cd pan-*
[nix-shell]$ ./configure
[nix-shell]$ make
[nix-shell]$ configurePhase
[nix-shell]$ buildPhase
[nix-shell]$ ./pan/gui/pan
```

1
perl/Makefile.config.in
View file

@ -2,7 +2,6 @@ CC = @CC@
CFLAGS = @CFLAGS@
CXX = @CXX@
CXXFLAGS = @CXXFLAGS@
HAVE_SODIUM = @HAVE_SODIUM@
PACKAGE_NAME = @PACKAGE_NAME@
PACKAGE_VERSION = @PACKAGE_VERSION@
SODIUM_LIBS = @SODIUM_LIBS@

6
perl/configure.ac
View file

@ -40,11 +40,7 @@ AC_SUBST(perllibdir, [${libdir}/perl5/site_perl/$perlversion/$perlarchname])
AC_MSG_RESULT($perllibdir)
# Look for libsodium, an optional dependency.
PKG_CHECK_MODULES([SODIUM], [libsodium],
[AC_DEFINE([HAVE_SODIUM], [1], [Whether to use libsodium for cryptography.])
CXXFLAGS="$SODIUM_CFLAGS $CXXFLAGS"
have_sodium=1], [have_sodium=])
AC_SUBST(HAVE_SODIUM, [$have_sodium])
PKG_CHECK_MODULES([SODIUM], [libsodium], [CXXFLAGS="$SODIUM_CFLAGS $CXXFLAGS"])
# Check for the required Perl dependencies (DBI and DBD::SQLite).
perlFlags="-I$perllibdir"

10
perl/lib/Nix/Store.xs
View file

@ -14,9 +14,7 @@
#include "util.hh"
#include "crypto.hh"
#if HAVE_SODIUM
#include <sodium.h>
#endif
using namespace nix;
@ -239,12 +237,8 @@ SV * convertHash(char * algo, char * s, int toBase32)
SV * signString(char * secretKey_, char * msg)
PPCODE:
try {
#if HAVE_SODIUM
auto sig = SecretKey(secretKey_).signDetached(msg);
XPUSHs(sv_2mortal(newSVpv(sig.c_str(), sig.size())));
#else
throw Error("Nix was not compiled with libsodium, required for signed binary cache support");
#endif
} catch (Error & e) {
croak("%s", e.what());
}
@ -253,7 +247,6 @@ SV * signString(char * secretKey_, char * msg)
int checkSignature(SV * publicKey_, SV * sig_, char * msg)
CODE:
try {
#if HAVE_SODIUM
STRLEN publicKeyLen;
unsigned char * publicKey = (unsigned char *) SvPV(publicKey_, publicKeyLen);
if (publicKeyLen != crypto_sign_PUBLICKEYBYTES)
@ -265,9 +258,6 @@ int checkSignature(SV * publicKey_, SV * sig_, char * msg)
throw Error("signature is not valid");
RETVAL = crypto_sign_verify_detached(sig, (unsigned char *) msg, strlen(msg), publicKey) == 0;
#else
throw Error("Nix was not compiled with libsodium, required for signed binary cache support");
#endif
} catch (Error & e) {
croak("%s", e.what());
}

16
src/libexpr/attr-path.cc
View file

@ -52,9 +52,7 @@ std::pair<Value *, Pos> findAlongAttrPath(EvalState & state, const string & attr
for (auto & attr : tokens) {
/* Is i an index (integer) or a normal attribute name? */
enum { apAttr, apIndex } apType = apAttr;
unsigned int attrIndex;
if (string2Int(attr, attrIndex)) apType = apIndex;
auto attrIndex = string2Int<unsigned int>(attr);
/* Evaluate the expression. */
Value * vNew = state.allocValue();
@ -65,9 +63,9 @@ std::pair<Value *, Pos> findAlongAttrPath(EvalState & state, const string & attr
/* It should evaluate to either a set or an expression,
according to what is specified in the attrPath. */
if (apType == apAttr) {
if (!attrIndex) {
if (v->type != tAttrs)
if (v->type() != nAttrs)
throw TypeError(
"the expression selected by the selection path '%1%' should be a set but is %2%",
attrPath,
@ -82,17 +80,17 @@ std::pair<Value *, Pos> findAlongAttrPath(EvalState & state, const string & attr
pos = *a->pos;
}
else if (apType == apIndex) {
else {
if (!v->isList())
throw TypeError(
"the expression selected by the selection path '%1%' should be a list but is %2%",
attrPath,
showType(*v));
if (attrIndex >= v->listSize())
throw AttrPathNotFound("list index %1% in selection path '%2%' is out of range", attrIndex, attrPath);
if (*attrIndex >= v->listSize())
throw AttrPathNotFound("list index %1% in selection path '%2%' is out of range", *attrIndex, attrPath);
v = v->listElems()[attrIndex];
v = v->listElems()[*attrIndex];
pos = noPos;
}

4
src/libexpr/attr-set.cc
View file

@ -24,9 +24,7 @@ void EvalState::mkAttrs(Value & v, size_t capacity)
v = vEmptySet;
return;
}
clearValue(v);
v.type = tAttrs;
v.attrs = allocBindings(capacity);
v.mkAttrs(allocBindings(capacity));
nrAttrsets++;
nrAttrsInAttrsets += capacity;
}

10
src/libexpr/common-eval-args.cc
View file

@ -14,14 +14,14 @@ MixEvalArgs::MixEvalArgs()
{
addFlag({
.longName = "arg",
.description = "argument to be passed to Nix functions",
.description = "Pass the value *expr* as the argument *name* to Nix functions.",
.labels = {"name", "expr"},
.handler = {[&](std::string name, std::string expr) { autoArgs[name] = 'E' + expr; }}
});
addFlag({
.longName = "argstr",
.description = "string-valued argument to be passed to Nix functions",
.description = "Pass the string *string* as the argument *name* to Nix functions.",
.labels = {"name", "string"},
.handler = {[&](std::string name, std::string s) { autoArgs[name] = 'S' + s; }},
});
@ -29,14 +29,14 @@ MixEvalArgs::MixEvalArgs()
addFlag({
.longName = "include",
.shortName = 'I',
.description = "add a path to the list of locations used to look up `<...>` file names",
.description = "Add *path* to the list of locations used to look up `<...>` file names.",
.labels = {"path"},
.handler = {[&](std::string s) { searchPath.push_back(s); }}
});
addFlag({
.longName = "impure",
.description = "allow access to mutable paths and repositories",
.description = "Allow access to mutable paths and repositories.",
.handler = {[&]() {
evalSettings.pureEval = false;
}},
@ -44,7 +44,7 @@ MixEvalArgs::MixEvalArgs()
addFlag({
.longName = "override-flake",
.description = "override a flake registry value",
.description = "Override the flake registries, redirecting *original-ref* to *resolved-ref*.",
.labels = {"original-ref", "resolved-ref"},
.handler = {[&](std::string _from, std::string _to) {
auto from = parseFlakeRef(_from, absPath("."));

28
src/libexpr/eval-cache.cc
View file

@ -390,14 +390,14 @@ Value & AttrCursor::forceValue()
}
if (root->db && (!cachedValue || std::get_if<placeholder_t>(&cachedValue->second))) {
if (v.type == tString)
if (v.type() == nString)
cachedValue = {root->db->setString(getKey(), v.string.s, v.string.context),
string_t{v.string.s, {}}};
else if (v.type == tPath)
cachedValue = {root->db->setString(getKey(), v.path), v.path};
else if (v.type == tBool)
else if (v.type() == nPath)
cachedValue = {root->db->setString(getKey(), v.path), string_t{v.path, {}}};
else if (v.type() == nBool)
cachedValue = {root->db->setBool(getKey(), v.boolean), v.boolean};
else if (v.type == tAttrs)
else if (v.type() == nAttrs)
; // FIXME: do something?
else
cachedValue = {root->db->setMisc(getKey()), misc_t()};
@ -442,7 +442,7 @@ std::shared_ptr<AttrCursor> AttrCursor::maybeGetAttr(Symbol name, bool forceErro
auto & v = forceValue();
if (v.type != tAttrs)
if (v.type() != nAttrs)
return nullptr;
//throw TypeError("'%s' is not an attribute set", getAttrPathStr());
@ -512,10 +512,10 @@ std::string AttrCursor::getString()
auto & v = forceValue();
if (v.type != tString && v.type != tPath)
throw TypeError("'%s' is not a string but %s", getAttrPathStr(), showType(v.type));
if (v.type() != nString && v.type() != nPath)
throw TypeError("'%s' is not a string but %s", getAttrPathStr(), showType(v.type()));
return v.type == tString ? v.string.s : v.path;
return v.type() == nString ? v.string.s : v.path;
}
string_t AttrCursor::getStringWithContext()
@ -543,12 +543,12 @@ string_t AttrCursor::getStringWithContext()
auto & v = forceValue();
if (v.type == tString)
if (v.type() == nString)
return {v.string.s, v.getContext()};
else if (v.type == tPath)
else if (v.type() == nPath)
return {v.path, {}};
else
throw TypeError("'%s' is not a string but %s", getAttrPathStr(), showType(v.type));
throw TypeError("'%s' is not a string but %s", getAttrPathStr(), showType(v.type()));
}
bool AttrCursor::getBool()
@ -567,7 +567,7 @@ bool AttrCursor::getBool()
auto & v = forceValue();
if (v.type != tBool)
if (v.type() != nBool)
throw TypeError("'%s' is not a Boolean", getAttrPathStr());
return v.boolean;
@ -589,7 +589,7 @@ std::vector<Symbol> AttrCursor::getAttrs()
auto & v = forceValue();
if (v.type != tAttrs)
if (v.type() != nAttrs)
throw TypeError("'%s' is not an attribute set", getAttrPathStr());
std::vector<Symbol> attrs;

16
src/libexpr/eval-inline.hh
View file

@ -32,23 +32,21 @@ LocalNoInlineNoReturn(void throwTypeError(const Pos & pos, const char * s, const
void EvalState::forceValue(Value & v, const Pos & pos)
{
if (v.type == tThunk) {
if (v.isThunk()) {
Env * env = v.thunk.env;
Expr * expr = v.thunk.expr;
try {
v.type = tBlackhole;
v.mkBlackhole();
//checkInterrupt();
expr->eval(*this, *env, v);
} catch (...) {
v.type = tThunk;
v.thunk.env = env;
v.thunk.expr = expr;
v.mkThunk(env, expr);
throw;
}
}
else if (v.type == tApp)
else if (v.isApp())
callFunction(*v.app.left, *v.app.right, v, noPos);
else if (v.type == tBlackhole)
else if (v.isBlackhole())
throwEvalError(pos, "infinite recursion encountered");
}
@ -56,7 +54,7 @@ void EvalState::forceValue(Value & v, const Pos & pos)
inline void EvalState::forceAttrs(Value & v)
{
forceValue(v);
if (v.type != tAttrs)
if (v.type() != nAttrs)
throwTypeError("value is %1% while a set was expected", v);
}
@ -64,7 +62,7 @@ inline void EvalState::forceAttrs(Value & v)
inline void EvalState::forceAttrs(Value & v, const Pos & pos)
{
forceValue(v, pos);
if (v.type != tAttrs)
if (v.type() != nAttrs)
throwTypeError(pos, "value is %1% while a set was expected", v);
}

255
src/libexpr/eval.cc
View file

@ -68,7 +68,7 @@ RootValue allocRootValue(Value * v)
}
static void printValue(std::ostream & str, std::set<const Value *> & active, const Value & v)
void printValue(std::ostream & str, std::set<const Value *> & active, const Value & v)
{
checkInterrupt();
@ -77,7 +77,7 @@ static void printValue(std::ostream & str, std::set<const Value *> & active, con
return;
}
switch (v.type) {
switch (v.internalType) {
case tInt:
str << v.integer;
break;
@ -158,32 +158,27 @@ std::ostream & operator << (std::ostream & str, const Value & v)
const Value *getPrimOp(const Value &v) {
const Value * primOp = &v;
while (primOp->type == tPrimOpApp) {
while (primOp->isPrimOpApp()) {
primOp = primOp->primOpApp.left;
}
assert(primOp->type == tPrimOp);
assert(primOp->isPrimOp());
return primOp;
}
string showType(ValueType type)
{
switch (type) {
case tInt: return "an integer";
case tBool: return "a Boolean";
case tString: return "a string";
case tPath: return "a path";
case tNull: return "null";
case tAttrs: return "a set";
case tList1: case tList2: case tListN: return "a list";
case tThunk: return "a thunk";
case tApp: return "a function application";
case tLambda: return "a function";
case tBlackhole: return "a black hole";
case tPrimOp: return "a built-in function";
case tPrimOpApp: return "a partially applied built-in function";
case tExternal: return "an external value";
case tFloat: return "a float";
case nInt: return "an integer";
case nBool: return "a Boolean";
case nString: return "a string";
case nPath: return "a path";
case nNull: return "null";
case nAttrs: return "a set";
case nList: return "a list";
case nFunction: return "a function";
case nExternal: return "an external value";
case nFloat: return "a float";
case nThunk: return "a thunk";
}
abort();
}
@ -191,15 +186,18 @@ string showType(ValueType type)
string showType(const Value & v)
{
switch (v.type) {
switch (v.internalType) {
case tString: return v.string.context ? "a string with context" : "a string";
case tPrimOp:
return fmt("the built-in function '%s'", string(v.primOp->name));
case tPrimOpApp:
return fmt("the partially applied built-in function '%s'", string(getPrimOp(v)->primOp->name));
case tExternal: return v.external->showType();
case tThunk: return "a thunk";
case tApp: return "a function application";
case tBlackhole: return "a black hole";
default:
return showType(v.type);
return showType(v.type());
}
}
@ -207,9 +205,9 @@ string showType(const Value & v)
bool Value::isTrivial() const
{
return
type != tApp
&& type != tPrimOpApp
&& (type != tThunk
internalType != tApp
&& internalType != tPrimOpApp
&& (internalType != tThunk
|| (dynamic_cast<ExprAttrs *>(thunk.expr)
&& ((ExprAttrs *) thunk.expr)->dynamicAttrs.empty())
|| dynamic_cast<ExprLambda *>(thunk.expr)
@ -404,11 +402,6 @@ EvalState::EvalState(const Strings & _searchPath, ref<Store> store)
for (auto & i : evalSettings.nixPath.get()) addToSearchPath(i);
}
try {
addToSearchPath("nix=" + canonPath(settings.nixDataDir + "/nix/corepkgs", true));
} catch (Error &) {
}
if (evalSettings.restrictEval || evalSettings.pureEval) {
allowedPaths = PathSet();
@ -432,9 +425,7 @@ EvalState::EvalState(const Strings & _searchPath, ref<Store> store)
}
}
clearValue(vEmptySet);
vEmptySet.type = tAttrs;
vEmptySet.attrs = allocBindings(0);
vEmptySet.mkAttrs(allocBindings(0));
createBaseEnv();
}
@ -461,6 +452,8 @@ Path EvalState::checkSourcePath(const Path & path_)
*/
Path abspath = canonPath(path_);
if (hasPrefix(abspath, corepkgsPrefix)) return abspath;
for (auto & i : *allowedPaths) {
if (isDirOrInDir(abspath, i)) {
found = true;
@ -550,16 +543,14 @@ Value * EvalState::addPrimOp(const string & name,
the primop to a dummy value. */
if (arity == 0) {
auto vPrimOp = allocValue();
vPrimOp->type = tPrimOp;
vPrimOp->primOp = new PrimOp { .fun = primOp, .arity = 1, .name = sym };
vPrimOp->mkPrimOp(new PrimOp { .fun = primOp, .arity = 1, .name = sym });
Value v;
mkApp(v, *vPrimOp, *vPrimOp);
return addConstant(name, v);
}
Value * v = allocValue();
v->type = tPrimOp;
v->primOp = new PrimOp { .fun = primOp, .arity = arity, .name = sym };
v->mkPrimOp(new PrimOp { .fun = primOp, .arity = arity, .name = sym });
staticBaseEnv.vars[symbols.create(name)] = baseEnvDispl;
baseEnv.values[baseEnvDispl++] = v;
baseEnv.values[0]->attrs->push_back(Attr(sym, v));
@ -574,8 +565,7 @@ Value * EvalState::addPrimOp(PrimOp && primOp)
if (primOp.arity == 0) {
primOp.arity = 1;
auto vPrimOp = allocValue();
vPrimOp->type = tPrimOp;
vPrimOp->primOp = new PrimOp(std::move(primOp));
vPrimOp->mkPrimOp(new PrimOp(std::move(primOp)));
Value v;
mkApp(v, *vPrimOp, *vPrimOp);
return addConstant(primOp.name, v);
@ -586,8 +576,7 @@ Value * EvalState::addPrimOp(PrimOp && primOp)
primOp.name = symbols.create(std::string(primOp.name, 2));
Value * v = allocValue();
v->type = tPrimOp;
v->primOp = new PrimOp(std::move(primOp));
v->mkPrimOp(new PrimOp(std::move(primOp)));
staticBaseEnv.vars[envName] = baseEnvDispl;
baseEnv.values[baseEnvDispl++] = v;
baseEnv.values[0]->attrs->push_back(Attr(primOp.name, v));
@ -603,9 +592,9 @@ Value & EvalState::getBuiltin(const string & name)
std::optional<EvalState::Doc> EvalState::getDoc(Value & v)
{
if (v.type == tPrimOp || v.type == tPrimOpApp) {
if (v.isPrimOp() || v.isPrimOpApp()) {
auto v2 = &v;
while (v2->type == tPrimOpApp)
while (v2->isPrimOpApp())
v2 = v2->primOpApp.left;
if (v2->primOp->doc)
return Doc {
@ -668,11 +657,6 @@ LocalNoInlineNoReturn(void throwTypeError(const Pos & pos, const char * s))
});
}
LocalNoInlineNoReturn(void throwTypeError(const char * s, const string & s1))
{
throw TypeError(s, s1);
}
LocalNoInlineNoReturn(void throwTypeError(const Pos & pos, const char * s, const ExprLambda & fun, const Symbol & s2))
{
throw TypeError({
@ -697,6 +681,14 @@ LocalNoInlineNoReturn(void throwUndefinedVarError(const Pos & pos, const char *
});
}
LocalNoInlineNoReturn(void throwMissingArgumentError(const Pos & pos, const char * s, const string & s1))
{
throw MissingArgumentError({
.hint = hintfmt(s, s1),
.errPos = pos
});
}
LocalNoInline(void addErrorTrace(Error & e, const char * s, const string & s2))
{
e.addTrace(std::nullopt, s, s2);
@ -710,15 +702,13 @@ LocalNoInline(void addErrorTrace(Error & e, const Pos & pos, const char * s, con
void mkString(Value & v, const char * s)
{
mkStringNoCopy(v, dupString(s));
v.mkString(dupString(s));
}
Value & mkString(Value & v, std::string_view s, const PathSet & context)
{
v.type = tString;
v.string.s = dupStringWithLen(s.data(), s.size());
v.string.context = 0;
v.mkString(dupStringWithLen(s.data(), s.size()));
if (!context.empty()) {
size_t n = 0;
v.string.context = (const char * *)
@ -733,7 +723,7 @@ Value & mkString(Value & v, std::string_view s, const PathSet & context)
void mkPath(Value & v, const char * s)
{
mkPathNoCopy(v, dupString(s));
v.mkPath(dupString(s));
}
@ -794,16 +784,9 @@ Env & EvalState::allocEnv(size_t size)
void EvalState::mkList(Value & v, size_t size)
{
clearValue(v);
if (size == 1)
v.type = tList1;
else if (size == 2)
v.type = tList2;
else {
v.type = tListN;
v.bigList.size = size;
v.bigList.elems = size ? (Value * *) allocBytes(size * sizeof(Value *)) : 0;
}
v.mkList(size);
if (size > 2)
v.bigList.elems = (Value * *) allocBytes(size * sizeof(Value *));
nrListElems += size;
}
@ -812,9 +795,7 @@ unsigned long nrThunks = 0;
static inline void mkThunk(Value & v, Env & env, Expr * expr)
{
v.type = tThunk;
v.thunk.env = &env;
v.thunk.expr = expr;
v.mkThunk(&env, expr);
nrThunks++;
}
@ -949,7 +930,7 @@ inline bool EvalState::evalBool(Env & env, Expr * e)
{
Value v;
e->eval(*this, env, v);
if (v.type != tBool)
if (v.type() != nBool)
throwTypeError("value is %1% while a Boolean was expected", v);
return v.boolean;
}
@ -959,7 +940,7 @@ inline bool EvalState::evalBool(Env & env, Expr * e, const Pos & pos)
{
Value v;
e->eval(*this, env, v);
if (v.type != tBool)
if (v.type() != nBool)
throwTypeError(pos, "value is %1% while a Boolean was expected", v);
return v.boolean;
}
@ -968,7 +949,7 @@ inline bool EvalState::evalBool(Env & env, Expr * e, const Pos & pos)
inline void EvalState::evalAttrs(Env & env, Expr * e, Value & v)
{
e->eval(*this, env, v);
if (v.type != tAttrs)
if (v.type() != nAttrs)
throwTypeError("value is %1% while a set was expected", v);
}
@ -1068,7 +1049,7 @@ void ExprAttrs::eval(EvalState & state, Env & env, Value & v)
Value nameVal;
i.nameExpr->eval(state, *dynamicEnv, nameVal);
state.forceValue(nameVal, i.pos);
if (nameVal.type == tNull)
if (nameVal.type() == nNull)
continue;
state.forceStringNoCtx(nameVal);
Symbol nameSym = state.symbols.create(nameVal.string.s);
@ -1153,7 +1134,7 @@ void ExprSelect::eval(EvalState & state, Env & env, Value & v)
Symbol name = getName(i, state, env);
if (def) {
state.forceValue(*vAttrs, pos);
if (vAttrs->type != tAttrs ||
if (vAttrs->type() != nAttrs ||
(j = vAttrs->attrs->find(name)) == vAttrs->attrs->end())
{
def->eval(state, env, v);
@ -1193,7 +1174,7 @@ void ExprOpHasAttr::eval(EvalState & state, Env & env, Value & v)
state.forceValue(*vAttrs);
Bindings::iterator j;
Symbol name = getName(i, state, env);
if (vAttrs->type != tAttrs ||
if (vAttrs->type() != nAttrs ||
(j = vAttrs->attrs->find(name)) == vAttrs->attrs->end())
{
mkBool(v, false);
@ -1209,9 +1190,7 @@ void ExprOpHasAttr::eval(EvalState & state, Env & env, Value & v)
void ExprLambda::eval(EvalState & state, Env & env, Value & v)
{
v.type = tLambda;
v.lambda.env = &env;
v.lambda.fun = this;
v.mkLambda(&env, this);
}
@ -1229,11 +1208,11 @@ void EvalState::callPrimOp(Value & fun, Value & arg, Value & v, const Pos & pos)
/* Figure out the number of arguments still needed. */
size_t argsDone = 0;
Value * primOp = &fun;
while (primOp->type == tPrimOpApp) {
while (primOp->isPrimOpApp()) {
argsDone++;
primOp = primOp->primOpApp.left;
}
assert(primOp->type == tPrimOp);
assert(primOp->isPrimOp());
auto arity = primOp->primOp->arity;
auto argsLeft = arity - argsDone;
@ -1244,7 +1223,7 @@ void EvalState::callPrimOp(Value & fun, Value & arg, Value & v, const Pos & pos)
Value * vArgs[arity];
auto n = arity - 1;
vArgs[n--] = &arg;
for (Value * arg = &fun; arg->type == tPrimOpApp; arg = arg->primOpApp.left)
for (Value * arg = &fun; arg->isPrimOpApp(); arg = arg->primOpApp.left)
vArgs[n--] = arg->primOpApp.right;
/* And call the primop. */
@ -1254,9 +1233,7 @@ void EvalState::callPrimOp(Value & fun, Value & arg, Value & v, const Pos & pos)
} else {
Value * fun2 = allocValue();
*fun2 = fun;
v.type = tPrimOpApp;
v.primOpApp.left = fun2;
v.primOpApp.right = &arg;
v.mkPrimOpApp(fun2, &arg);
}
}
@ -1266,12 +1243,12 @@ void EvalState::callFunction(Value & fun, Value & arg, Value & v, const Pos & po
forceValue(fun, pos);
if (fun.type == tPrimOp || fun.type == tPrimOpApp) {
if (fun.isPrimOp() || fun.isPrimOpApp()) {
callPrimOp(fun, arg, v, pos);
return;
}
if (fun.type == tAttrs) {
if (fun.type() == nAttrs) {
auto found = fun.attrs->find(sFunctor);
if (found != fun.attrs->end()) {
/* fun may be allocated on the stack of the calling function,
@ -1287,7 +1264,7 @@ void EvalState::callFunction(Value & fun, Value & arg, Value & v, const Pos & po
}
}
if (fun.type != tLambda)
if (!fun.isLambda())
throwTypeError(pos, "attempt to call something which is not a function but %1%", fun);
ExprLambda & lambda(*fun.lambda.fun);
@ -1370,7 +1347,7 @@ void EvalState::autoCallFunction(Bindings & args, Value & fun, Value & res)
{
forceValue(fun);
if (fun.type == tAttrs) {
if (fun.type() == nAttrs) {
auto found = fun.attrs->find(sFunctor);
if (found != fun.attrs->end()) {
Value * v = allocValue();
@ -1380,7 +1357,7 @@ void EvalState::autoCallFunction(Bindings & args, Value & fun, Value & res)
}
}
if (fun.type != tLambda || !fun.lambda.fun->matchAttrs) {
if (!fun.isLambda() || !fun.lambda.fun->matchAttrs) {
res = fun;
return;
}
@ -1402,7 +1379,13 @@ void EvalState::autoCallFunction(Bindings & args, Value & fun, Value & res)
if (j != args.end()) {
actualArgs->attrs->push_back(*j);
} else if (!i.def) {
throwTypeError("cannot auto-call a function that has an argument without a default value ('%1%')", i.name);
throwMissingArgumentError(i.pos, R"(cannot evaluate a function that has an argument without a value ('%1%')
nix attempted to evaluate a function as a top level expression; in this case it must have its
arguments supplied either by default values, or passed explicitly with --arg or --argstr.
https://nixos.org/manual/nix/stable/#ss-functions)", i.name);
}
}
}
@ -1564,7 +1547,7 @@ void ExprConcatStrings::eval(EvalState & state, Env & env, Value & v)
NixFloat nf = 0;
bool first = !forceString;
ValueType firstType = tString;
ValueType firstType = nString;
for (auto & i : *es) {
Value vTmp;
@ -1575,36 +1558,36 @@ void ExprConcatStrings::eval(EvalState & state, Env & env, Value & v)
since paths are copied when they are used in a derivation),
and none of the strings are allowed to have contexts. */
if (first) {
firstType = vTmp.type;
firstType = vTmp.type();
first = false;
}
if (firstType == tInt) {
if (vTmp.type == tInt) {
if (firstType == nInt) {
if (vTmp.type() == nInt) {
n += vTmp.integer;
} else if (vTmp.type == tFloat) {
} else if (vTmp.type() == nFloat) {
// Upgrade the type from int to float;
firstType = tFloat;
firstType = nFloat;
nf = n;
nf += vTmp.fpoint;
} else
throwEvalError(pos, "cannot add %1% to an integer", showType(vTmp));
} else if (firstType == tFloat) {
if (vTmp.type == tInt) {
} else if (firstType == nFloat) {
if (vTmp.type() == nInt) {
nf += vTmp.integer;
} else if (vTmp.type == tFloat) {
} else if (vTmp.type() == nFloat) {
nf += vTmp.fpoint;
} else
throwEvalError(pos, "cannot add %1% to a float", showType(vTmp));
} else
s << state.coerceToString(pos, vTmp, context, false, firstType == tString);
s << state.coerceToString(pos, vTmp, context, false, firstType == nString);
}
if (firstType == tInt)
if (firstType == nInt)
mkInt(v, n);
else if (firstType == tFloat)
else if (firstType == nFloat)
mkFloat(v, nf);
else if (firstType == tPath) {
else if (firstType == nPath) {
if (!context.empty())
throwEvalError(pos, "a string that refers to a store path cannot be appended to a path");
auto path = canonPath(s.str());
@ -1631,7 +1614,7 @@ void EvalState::forceValueDeep(Value & v)
forceValue(v);
if (v.type == tAttrs) {
if (v.type() == nAttrs) {
for (auto & i : *v.attrs)
try {
recurse(*i.value);
@ -1654,7 +1637,7 @@ void EvalState::forceValueDeep(Value & v)
NixInt EvalState::forceInt(Value & v, const Pos & pos)
{
forceValue(v, pos);
if (v.type != tInt)
if (v.type() != nInt)
throwTypeError(pos, "value is %1% while an integer was expected", v);
return v.integer;
}
@ -1663,9 +1646,9 @@ NixInt EvalState::forceInt(Value & v, const Pos & pos)
NixFloat EvalState::forceFloat(Value & v, const Pos & pos)
{
forceValue(v, pos);
if (v.type == tInt)
if (v.type() == nInt)
return v.integer;
else if (v.type != tFloat)
else if (v.type() != nFloat)
throwTypeError(pos, "value is %1% while a float was expected", v);
return v.fpoint;
}
@ -1674,7 +1657,7 @@ NixFloat EvalState::forceFloat(Value & v, const Pos & pos)
bool EvalState::forceBool(Value & v, const Pos & pos)
{
forceValue(v, pos);
if (v.type != tBool)
if (v.type() != nBool)
throwTypeError(pos, "value is %1% while a Boolean was expected", v);
return v.boolean;
}
@ -1682,14 +1665,14 @@ bool EvalState::forceBool(Value & v, const Pos & pos)
bool EvalState::isFunctor(Value & fun)
{
return fun.type == tAttrs && fun.attrs->find(sFunctor) != fun.attrs->end();
return fun.type() == nAttrs && fun.attrs->find(sFunctor) != fun.attrs->end();
}
void EvalState::forceFunction(Value & v, const Pos & pos)
{
forceValue(v, pos);
if (v.type != tLambda && v.type != tPrimOp && v.type != tPrimOpApp && !isFunctor(v))
if (v.type() != nFunction && !isFunctor(v))
throwTypeError(pos, "value is %1% while a function was expected", v);
}
@ -1697,7 +1680,7 @@ void EvalState::forceFunction(Value & v, const Pos & pos)
string EvalState::forceString(Value & v, const Pos & pos)
{
forceValue(v, pos);
if (v.type != tString) {
if (v.type() != nString) {
if (pos)
throwTypeError(pos, "value is %1% while a string was expected", v);
else
@ -1730,7 +1713,7 @@ void copyContext(const Value & v, PathSet & context)
std::vector<std::pair<Path, std::string>> Value::getContext()
{
std::vector<std::pair<Path, std::string>> res;
assert(type == tString);
assert(internalType == tString);
if (string.context)
for (const char * * p = string.context; *p; ++p)
res.push_back(decodeContext(*p));
@ -1763,11 +1746,11 @@ string EvalState::forceStringNoCtx(Value & v, const Pos & pos)
bool EvalState::isDerivation(Value & v)
{
if (v.type != tAttrs) return false;
if (v.type() != nAttrs) return false;
Bindings::iterator i = v.attrs->find(sType);
if (i == v.attrs->end()) return false;
forceValue(*i->value);
if (i->value->type != tString) return false;
if (i->value->type() != nString) return false;
return strcmp(i->value->string.s, "derivation") == 0;
}
@ -1792,17 +1775,17 @@ string EvalState::coerceToString(const Pos & pos, Value & v, PathSet & context,
string s;
if (v.type == tString) {
if (v.type() == nString) {
copyContext(v, context);
return v.string.s;
}
if (v.type == tPath) {
if (v.type() == nPath) {
Path path(canonPath(v.path));
return copyToStore ? copyPathToStore(context, path) : path;
}
if (v.type == tAttrs) {
if (v.type() == nAttrs) {
auto maybeString = tryAttrsToString(pos, v, context, coerceMore, copyToStore);
if (maybeString) {
return *maybeString;
@ -1812,18 +1795,18 @@ string EvalState::coerceToString(const Pos & pos, Value & v, PathSet & context,
return coerceToString(pos, *i->value, context, coerceMore, copyToStore);
}
if (v.type == tExternal)
if (v.type() == nExternal)
return v.external->coerceToString(pos, context, coerceMore, copyToStore);
if (coerceMore) {
/* Note that `false' is represented as an empty string for
shell scripting convenience, just like `null'. */
if (v.type == tBool && v.boolean) return "1";
if (v.type == tBool && !v.boolean) return "";
if (v.type == tInt) return std::to_string(v.integer);
if (v.type == tFloat) return std::to_string(v.fpoint);
if (v.type == tNull) return "";
if (v.type() == nBool && v.boolean) return "1";
if (v.type() == nBool && !v.boolean) return "";
if (v.type() == nInt) return std::to_string(v.integer);
if (v.type() == nFloat) return std::to_string(v.fpoint);
if (v.type() == nNull) return "";
if (v.isList()) {
string result;
@ -1886,40 +1869,38 @@ bool EvalState::eqValues(Value & v1, Value & v2)
if (&v1 == &v2) return true;
// Special case type-compatibility between float and int
if (v1.type == tInt && v2.type == tFloat)
if (v1.type() == nInt && v2.type() == nFloat)
return v1.integer == v2.fpoint;
if (v1.type == tFloat && v2.type == tInt)
if (v1.type() == nFloat && v2.type() == nInt)
return v1.fpoint == v2.integer;
// All other types are not compatible with each other.
if (v1.type != v2.type) return false;
if (v1.type() != v2.type()) return false;
switch (v1.type) {
switch (v1.type()) {
case tInt:
case nInt:
return v1.integer == v2.integer;
case tBool:
case nBool:
return v1.boolean == v2.boolean;
case tString:
case nString:
return strcmp(v1.string.s, v2.string.s) == 0;
case tPath:
case nPath:
return strcmp(v1.path, v2.path) == 0;
case tNull:
case nNull:
return true;
case tList1:
case tList2:
case tListN:
case nList:
if (v1.listSize() != v2.listSize()) return false;
for (size_t n = 0; n < v1.listSize(); ++n)
if (!eqValues(*v1.listElems()[n], *v2.listElems()[n])) return false;
return true;
case tAttrs: {
case nAttrs: {
/* If both sets denote a derivation (type = "derivation"),
then compare their outPaths. */
if (isDerivation(v1) && isDerivation(v2)) {
@ -1941,15 +1922,13 @@ bool EvalState::eqValues(Value & v1, Value & v2)
}
/* Functions are incomparable. */
case tLambda:
case tPrimOp:
case tPrimOpApp:
case nFunction:
return false;
case tExternal:
case nExternal:
return *v1.external == *v2.external;
case tFloat:
case nFloat:
return v1.fpoint == v2.fpoint;
default:

2
src/libexpr/eval.hh
View file

@ -432,4 +432,6 @@ struct EvalSettings : Config
extern EvalSettings evalSettings;
static const std::string corepkgsPrefix{"/__corepkgs__/"};
}

0
corepkgs/fetchurl.nix → src/libexpr/fetchurl.nix
View file

55
src/libexpr/flake/flake.cc
View file

@ -73,7 +73,7 @@ static std::tuple<fetchers::Tree, FlakeRef, FlakeRef> fetchOrSubstituteTree(
static void forceTrivialValue(EvalState & state, Value & value, const Pos & pos)
{
if (value.type == tThunk && value.isTrivial())
if (value.isThunk() && value.isTrivial())
state.forceValue(value, pos);
}
@ -82,9 +82,9 @@ static void expectType(EvalState & state, ValueType type,
Value & value, const Pos & pos)
{
forceTrivialValue(state, value, pos);
if (value.type != type)
if (value.type() != type)
throw Error("expected %s but got %s at %s",
showType(type), showType(value.type), pos);
showType(type), showType(value.type()), pos);
}
static std::map<FlakeId, FlakeInput> parseFlakeInputs(
@ -93,7 +93,7 @@ static std::map<FlakeId, FlakeInput> parseFlakeInputs(
static FlakeInput parseFlakeInput(EvalState & state,
const std::string & inputName, Value * value, const Pos & pos)
{
expectType(state, tAttrs, *value, pos);
expectType(state, nAttrs, *value, pos);
FlakeInput input;
@ -108,23 +108,32 @@ static FlakeInput parseFlakeInput(EvalState & state,
for (nix::Attr attr : *(value->attrs)) {
try {
if (attr.name == sUrl) {
expectType(state, tString, *attr.value, *attr.pos);
expectType(state, nString, *attr.value, *attr.pos);
url = attr.value->string.s;
attrs.emplace("url", *url);
} else if (attr.name == sFlake) {
expectType(state, tBool, *attr.value, *attr.pos);
expectType(state, nBool, *attr.value, *attr.pos);
input.isFlake = attr.value->boolean;
} else if (attr.name == sInputs) {
input.overrides = parseFlakeInputs(state, attr.value, *attr.pos);
} else if (attr.name == sFollows) {
expectType(state, tString, *attr.value, *attr.pos);
expectType(state, nString, *attr.value, *attr.pos);
input.follows = parseInputPath(attr.value->string.s);
} else {
if (attr.value->type == tString)
attrs.emplace(attr.name, attr.value->string.s);
else
throw TypeError("flake input attribute '%s' is %s while a string is expected",
attr.name, showType(*attr.value));
switch (attr.value->type()) {
case nString:
attrs.emplace(attr.name, attr.value->string.s);
break;
case nBool:
attrs.emplace(attr.name, Explicit<bool> { attr.value->boolean });
break;
case nInt:
attrs.emplace(attr.name, (long unsigned int)attr.value->integer);
break;
default:
throw TypeError("flake input attribute '%s' is %s while a string, Boolean, or integer is expected",
attr.name, showType(*attr.value));
}
}
} catch (Error & e) {
e.addTrace(*attr.pos, hintfmt("in flake attribute '%s'", attr.name));
@ -158,7 +167,7 @@ static std::map<FlakeId, FlakeInput> parseFlakeInputs(
{
std::map<FlakeId, FlakeInput> inputs;
expectType(state, tAttrs, *value, pos);
expectType(state, nAttrs, *value, pos);
for (nix::Attr & inputAttr : *(*value).attrs) {
inputs.emplace(inputAttr.name,
@ -199,10 +208,10 @@ static Flake getFlake(
Value vInfo;
state.evalFile(flakeFile, vInfo, true); // FIXME: symlink attack
expectType(state, tAttrs, vInfo, Pos(foFile, state.symbols.create(flakeFile), 0, 0));
expectType(state, nAttrs, vInfo, Pos(foFile, state.symbols.create(flakeFile), 0, 0));
if (auto description = vInfo.attrs->get(state.sDescription)) {
expectType(state, tString, *description->value, *description->pos);
expectType(state, nString, *description->value, *description->pos);
flake.description = description->value->string.s;
}
@ -214,9 +223,9 @@ static Flake getFlake(
auto sOutputs = state.symbols.create("outputs");
if (auto outputs = vInfo.attrs->get(sOutputs)) {
expectType(state, tLambda, *outputs->value, *outputs->pos);
expectType(state, nFunction, *outputs->value, *outputs->pos);
if (outputs->value->lambda.fun->matchAttrs) {
if (outputs->value->isLambda() && outputs->value->lambda.fun->matchAttrs) {
for (auto & formal : outputs->value->lambda.fun->formals->formals) {
if (formal.name != state.sSelf)
flake.inputs.emplace(formal.name, FlakeInput {
@ -231,21 +240,21 @@ static Flake getFlake(
auto sNixConfig = state.symbols.create("nixConfig");
if (auto nixConfig = vInfo.attrs->get(sNixConfig)) {
expectType(state, tAttrs, *nixConfig->value, *nixConfig->pos);
expectType(state, nAttrs, *nixConfig->value, *nixConfig->pos);
for (auto & setting : *nixConfig->value->attrs) {
forceTrivialValue(state, *setting.value, *setting.pos);
if (setting.value->type == tString)
if (setting.value->type() == nString)
flake.config.settings.insert({setting.name, state.forceStringNoCtx(*setting.value, *setting.pos)});
else if (setting.value->type == tInt)
else if (setting.value->type() == nInt)
flake.config.settings.insert({setting.name, state.forceInt(*setting.value, *setting.pos)});
else if (setting.value->type == tBool)
else if (setting.value->type() == nBool)
flake.config.settings.insert({setting.name, state.forceBool(*setting.value, *setting.pos)});
else if (setting.value->isList()) {
else if (setting.value->type() == nList) {
std::vector<std::string> ss;
for (unsigned int n = 0; n < setting.value->listSize(); ++n) {
auto elem = setting.value->listElems()[n];
if (elem->type != tString)
if (elem->type() != nString)
throw TypeError("list element in flake configuration setting '%s' is %s while a string is expected",
setting.name, showType(*setting.value));
ss.push_back(state.forceStringNoCtx(*elem, *setting.pos));

38
src/libexpr/get-drvs.cc
View file

@ -128,7 +128,7 @@ DrvInfo::Outputs DrvInfo::queryOutputs(bool onlyOutputsToInstall)
if (!outTI->isList()) throw errMsg;
Outputs result;
for (auto i = outTI->listElems(); i != outTI->listElems() + outTI->listSize(); ++i) {
if ((*i)->type != tString) throw errMsg;
if ((*i)->type() != nString) throw errMsg;
auto out = outputs.find((*i)->string.s);
if (out == outputs.end()) throw errMsg;
result.insert(*out);
@ -172,20 +172,20 @@ StringSet DrvInfo::queryMetaNames()
bool DrvInfo::checkMeta(Value & v)
{
state->forceValue(v);
if (v.isList()) {
if (v.type() == nList) {
for (unsigned int n = 0; n < v.listSize(); ++n)
if (!checkMeta(*v.listElems()[n])) return false;
return true;
}
else if (v.type == tAttrs) {
else if (v.type() == nAttrs) {
Bindings::iterator i = v.attrs->find(state->sOutPath);
if (i != v.attrs->end()) return false;
for (auto & i : *v.attrs)
if (!checkMeta(*i.value)) return false;
return true;
}
else return v.type == tInt || v.type == tBool || v.type == tString ||
v.type == tFloat;
else return v.type() == nInt || v.type() == nBool || v.type() == nString ||
v.type() == nFloat;
}
@ -201,7 +201,7 @@ Value * DrvInfo::queryMeta(const string & name)
string DrvInfo::queryMetaString(const string & name)
{
Value * v = queryMeta(name);
if (!v || v->type != tString) return "";
if (!v || v->type() != nString) return "";
return v->string.s;
}
@ -210,12 +210,12 @@ NixInt DrvInfo::queryMetaInt(const string & name, NixInt def)
{
Value * v = queryMeta(name);
if (!v) return def;
if (v->type == tInt) return v->integer;
if (v->type == tString) {
if (v->type() == nInt) return v->integer;
if (v->type() == nString) {
/* Backwards compatibility with before we had support for
integer meta fields. */
NixInt n;
if (string2Int(v->string.s, n)) return n;
if (auto n = string2Int<NixInt>(v->string.s))
return *n;
}
return def;
}
@ -224,12 +224,12 @@ NixFloat DrvInfo::queryMetaFloat(const string & name, NixFloat def)
{
Value * v = queryMeta(name);
if (!v) return def;
if (v->type == tFloat) return v->fpoint;
if (v->type == tString) {
if (v->type() == nFloat) return v->fpoint;
if (v->type() == nString) {
/* Backwards compatibility with before we had support for
float meta fields. */
NixFloat n;
if (string2Float(v->string.s, n)) return n;
if (auto n = string2Float<NixFloat>(v->string.s))
return *n;
}
return def;
}
@ -239,8 +239,8 @@ bool DrvInfo::queryMetaBool(const string & name, bool def)
{
Value * v = queryMeta(name);
if (!v) return def;
if (v->type == tBool) return v->boolean;
if (v->type == tString) {
if (v->type() == nBool) return v->boolean;
if (v->type() == nString) {
/* Backwards compatibility with before we had support for
Boolean meta fields. */
if (strcmp(v->string.s, "true") == 0) return true;
@ -331,7 +331,7 @@ static void getDerivations(EvalState & state, Value & vIn,
/* Process the expression. */
if (!getDerivation(state, v, pathPrefix, drvs, done, ignoreAssertionFailures)) ;
else if (v.type == tAttrs) {
else if (v.type() == nAttrs) {
/* !!! undocumented hackery to support combining channels in
nix-env.cc. */
@ -353,7 +353,7 @@ static void getDerivations(EvalState & state, Value & vIn,
/* If the value of this attribute is itself a set,
should we recurse into it? => Only if it has a
`recurseForDerivations = true' attribute. */
if (i->value->type == tAttrs) {
if (i->value->type() == nAttrs) {
Bindings::iterator j = i->value->attrs->find(state.sRecurseForDerivations);
if (j != i->value->attrs->end() && state.forceBool(*j->value, *j->pos))
getDerivations(state, *i->value, pathPrefix2, autoArgs, drvs, done, ignoreAssertionFailures);
@ -362,7 +362,7 @@ static void getDerivations(EvalState & state, Value & vIn,
}
}
else if (v.isList()) {
else if (v.type() == nList) {
for (unsigned int n = 0; n < v.listSize(); ++n) {
string pathPrefix2 = addToPath(pathPrefix, (format("%1%") % n).str());
if (getDerivation(state, *v.listElems()[n], pathPrefix2, drvs, done, ignoreAssertionFailures))

2
src/libexpr/local.mk
View file

@ -40,6 +40,6 @@ $(eval $(call install-file-in, $(d)/nix-expr.pc, $(prefix)/lib/pkgconfig, 0644))
$(foreach i, $(wildcard src/libexpr/flake/*.hh), \
$(eval $(call install-file-in, $(i), $(includedir)/nix/flake, 0644)))
$(d)/primops.cc: $(d)/imported-drv-to-derivation.nix.gen.hh $(d)/primops/derivation.nix.gen.hh
$(d)/primops.cc: $(d)/imported-drv-to-derivation.nix.gen.hh $(d)/primops/derivation.nix.gen.hh $(d)/fetchurl.nix.gen.hh
$(d)/flake/flake.cc: $(d)/flake/call-flake.nix.gen.hh

3
src/libexpr/nixexpr.hh
View file

@ -17,6 +17,7 @@ MakeError(ThrownError, AssertionError);
MakeError(Abort, EvalError);
MakeError(TypeError, EvalError);
MakeError(UndefinedVarError, Error);
MakeError(MissingArgumentError, Error);
MakeError(RestrictedPathError, Error);
@ -129,7 +130,7 @@ struct ExprPath : Expr
{
string s;
Value v;
ExprPath(const string & s) : s(s) { mkPathNoCopy(v, this->s.c_str()); };
ExprPath(const string & s) : s(s) { v.mkPath(this->s.c_str()); };
COMMON_METHODS
Value * maybeThunk(EvalState & state, Env & env);
};

4
src/libexpr/parser.y
View file

@ -698,6 +698,10 @@ Path EvalState::findFile(SearchPath & searchPath, const string & path, const Pos
Path res = r.second + suffix;
if (pathExists(res)) return canonPath(res);
}
if (hasPrefix(path, "nix/"))
return corepkgsPrefix + path.substr(4);
throw ThrownError({
.hint = hintfmt(evalSettings.pureEval
? "cannot look up '<%s>' in pure evaluation mode (use '--impure' to override)"

107
src/libexpr/primops.cc
View file

@ -164,7 +164,15 @@ static void import(EvalState & state, const Pos & pos, Value & vPath, Value * vS
state.forceFunction(**fun, pos);
mkApp(v, **fun, w);
state.forceAttrs(v, pos);
} else {
}
else if (path == corepkgsPrefix + "fetchurl.nix") {
state.eval(state.parseExprFromString(
#include "fetchurl.nix.gen.hh"
, "/"), v);
}
else {
if (!vScope)
state.evalFile(realPath, v);
else {
@ -356,24 +364,20 @@ static void prim_typeOf(EvalState & state, const Pos & pos, Value * * args, Valu
{
state.forceValue(*args[0], pos);
string t;
switch (args[0]->type) {
case tInt: t = "int"; break;
case tBool: t = "bool"; break;
case tString: t = "string"; break;
case tPath: t = "path"; break;
case tNull: t = "null"; break;
case tAttrs: t = "set"; break;
case tList1: case tList2: case tListN: t = "list"; break;
case tLambda:
case tPrimOp:
case tPrimOpApp:
t = "lambda";
break;
case tExternal:
switch (args[0]->type()) {
case nInt: t = "int"; break;
case nBool: t = "bool"; break;
case nString: t = "string"; break;
case nPath: t = "path"; break;
case nNull: t = "null"; break;
case nAttrs: t = "set"; break;
case nList: t = "list"; break;
case nFunction: t = "lambda"; break;
case nExternal:
t = args[0]->external->typeOf();
break;
case tFloat: t = "float"; break;
default: abort();
case nFloat: t = "float"; break;
case nThunk: abort();
}
mkString(v, state.symbols.create(t));
}
@ -393,7 +397,7 @@ static RegisterPrimOp primop_typeOf({
static void prim_isNull(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
state.forceValue(*args[0], pos);
mkBool(v, args[0]->type == tNull);
mkBool(v, args[0]->type() == nNull);
}
static RegisterPrimOp primop_isNull({
@ -413,18 +417,7 @@ static RegisterPrimOp primop_isNull({
static void prim_isFunction(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
state.forceValue(*args[0], pos);
bool res;
switch (args[0]->type) {
case tLambda:
case tPrimOp:
case tPrimOpApp:
res = true;
break;
default:
res = false;
break;
}
mkBool(v, res);
mkBool(v, args[0]->type() == nFunction);
}
static RegisterPrimOp primop_isFunction({
@ -440,7 +433,7 @@ static RegisterPrimOp primop_isFunction({
static void prim_isInt(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
state.forceValue(*args[0], pos);
mkBool(v, args[0]->type == tInt);
mkBool(v, args[0]->type() == nInt);
}
static RegisterPrimOp primop_isInt({
@ -456,7 +449,7 @@ static RegisterPrimOp primop_isInt({
static void prim_isFloat(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
state.forceValue(*args[0], pos);
mkBool(v, args[0]->type == tFloat);
mkBool(v, args[0]->type() == nFloat);
}
static RegisterPrimOp primop_isFloat({
@ -472,7 +465,7 @@ static RegisterPrimOp primop_isFloat({
static void prim_isString(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
state.forceValue(*args[0], pos);
mkBool(v, args[0]->type == tString);
mkBool(v, args[0]->type() == nString);
}
static RegisterPrimOp primop_isString({
@ -488,7 +481,7 @@ static RegisterPrimOp primop_isString({
static void prim_isBool(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
state.forceValue(*args[0], pos);
mkBool(v, args[0]->type == tBool);
mkBool(v, args[0]->type() == nBool);
}
static RegisterPrimOp primop_isBool({
@ -504,7 +497,7 @@ static RegisterPrimOp primop_isBool({
static void prim_isPath(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
state.forceValue(*args[0], pos);
mkBool(v, args[0]->type == tPath);
mkBool(v, args[0]->type() == nPath);
}
static RegisterPrimOp primop_isPath({
@ -520,20 +513,20 @@ struct CompareValues
{
bool operator () (const Value * v1, const Value * v2) const
{
if (v1->type == tFloat && v2->type == tInt)
if (v1->type() == nFloat && v2->type() == nInt)
return v1->fpoint < v2->integer;
if (v1->type == tInt && v2->type == tFloat)
if (v1->type() == nInt && v2->type() == nFloat)
return v1->integer < v2->fpoint;
if (v1->type != v2->type)
if (v1->type() != v2->type())
throw EvalError("cannot compare %1% with %2%", showType(*v1), showType(*v2));
switch (v1->type) {
case tInt:
switch (v1->type()) {
case nInt:
return v1->integer < v2->integer;
case tFloat:
case nFloat:
return v1->fpoint < v2->fpoint;
case tString:
case nString:
return strcmp(v1->string.s, v2->string.s) < 0;
case tPath:
case nPath:
return strcmp(v1->path, v2->path) < 0;
default:
throw EvalError("cannot compare %1% with %2%", showType(*v1), showType(*v2));
@ -777,7 +770,7 @@ static RegisterPrimOp primop_deepSeq({
static void prim_trace(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
state.forceValue(*args[0], pos);
if (args[0]->type == tString)
if (args[0]->type() == nString)
printError("trace: %1%", args[0]->string.s);
else
printError("trace: %1%", *args[0]);
@ -902,7 +895,7 @@ static void prim_derivationStrict(EvalState & state, const Pos & pos, Value * *
if (ignoreNulls) {
state.forceValue(*i->value, pos);
if (i->value->type == tNull) continue;
if (i->value->type() == nNull) continue;
}
if (i->name == state.sContentAddressed) {
@ -1308,7 +1301,7 @@ static void prim_dirOf(EvalState & state, const Pos & pos, Value * * args, Value
{
PathSet context;
Path dir = dirOf(state.coerceToString(pos, *args[0], context, false, false));
if (args[0]->type == tPath) mkPath(v, dir.c_str()); else mkString(v, dir, context);
if (args[0]->type() == nPath) mkPath(v, dir.c_str()); else mkString(v, dir, context);
}
static RegisterPrimOp primop_dirOf({
@ -1449,7 +1442,7 @@ static void prim_readDir(EvalState & state, const Pos & pos, Value * * args, Val
Value * ent_val = state.allocAttr(v, state.symbols.create(ent.name));
if (ent.type == DT_UNKNOWN)
ent.type = getFileType(path + "/" + ent.name);
mkStringNoCopy(*ent_val,
ent_val->mkString(
ent.type == DT_REG ? "regular" :
ent.type == DT_DIR ? "directory" :
ent.type == DT_LNK ? "symlink" :
@ -1813,7 +1806,7 @@ static void prim_filterSource(EvalState & state, const Pos & pos, Value * * args
});
state.forceValue(*args[0], pos);
if (args[0]->type != tLambda)
if (args[0]->type() != nFunction)
throw TypeError({
.hint = hintfmt(
"first argument in call to 'filterSource' is not a function but %1%",
@ -2079,7 +2072,7 @@ static RegisterPrimOp primop_hasAttr({
static void prim_isAttrs(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
state.forceValue(*args[0], pos);
mkBool(v, args[0]->type == tAttrs);
mkBool(v, args[0]->type() == nAttrs);
}
static RegisterPrimOp primop_isAttrs({
@ -2259,11 +2252,11 @@ static RegisterPrimOp primop_catAttrs({
static void prim_functionArgs(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
state.forceValue(*args[0], pos);
if (args[0]->type == tPrimOpApp || args[0]->type == tPrimOp) {
if (args[0]->isPrimOpApp() || args[0]->isPrimOp()) {
state.mkAttrs(v, 0);
return;
}
if (args[0]->type != tLambda)
if (!args[0]->isLambda())
throw TypeError({
.hint = hintfmt("'functionArgs' requires a function"),
.errPos = pos
@ -2342,7 +2335,7 @@ static RegisterPrimOp primop_mapAttrs({
static void prim_isList(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
state.forceValue(*args[0], pos);
mkBool(v, args[0]->isList());
mkBool(v, args[0]->type() == nList);
}
static RegisterPrimOp primop_isList({
@ -2694,7 +2687,7 @@ static void prim_sort(EvalState & state, const Pos & pos, Value * * args, Value
auto comparator = [&](Value * a, Value * b) {
/* Optimization: if the comparator is lessThan, bypass
callFunction. */
if (args[0]->type == tPrimOp && args[0]->primOp->fun == prim_lessThan)
if (args[0]->isPrimOp() && args[0]->primOp->fun == prim_lessThan)
return CompareValues()(a, b);
Value vTmp1, vTmp2;
@ -2836,7 +2829,7 @@ static void prim_add(EvalState & state, const Pos & pos, Value * * args, Value &
{
state.forceValue(*args[0], pos);
state.forceValue(*args[1], pos);
if (args[0]->type == tFloat || args[1]->type == tFloat)
if (args[0]->type() == nFloat || args[1]->type() == nFloat)
mkFloat(v, state.forceFloat(*args[0], pos) + state.forceFloat(*args[1], pos));
else
mkInt(v, state.forceInt(*args[0], pos) + state.forceInt(*args[1], pos));
@ -2855,7 +2848,7 @@ static void prim_sub(EvalState & state, const Pos & pos, Value * * args, Value &
{
state.forceValue(*args[0], pos);
state.forceValue(*args[1], pos);
if (args[0]->type == tFloat || args[1]->type == tFloat)
if (args[0]->type() == nFloat || args[1]->type() == nFloat)
mkFloat(v, state.forceFloat(*args[0], pos) - state.forceFloat(*args[1], pos));
else
mkInt(v, state.forceInt(*args[0], pos) - state.forceInt(*args[1], pos));
@ -2874,7 +2867,7 @@ static void prim_mul(EvalState & state, const Pos & pos, Value * * args, Value &
{
state.forceValue(*args[0], pos);
state.forceValue(*args[1], pos);
if (args[0]->type == tFloat || args[1]->type == tFloat)
if (args[0]->type() == nFloat || args[1]->type() == nFloat)
mkFloat(v, state.forceFloat(*args[0], pos) * state.forceFloat(*args[1], pos));
else
mkInt(v, state.forceInt(*args[0], pos) * state.forceInt(*args[1], pos));
@ -2901,7 +2894,7 @@ static void prim_div(EvalState & state, const Pos & pos, Value * * args, Value &
.errPos = pos
});
if (args[0]->type == tFloat || args[1]->type == tFloat) {
if (args[0]->type() == nFloat || args[1]->type() == nFloat) {
mkFloat(v, state.forceFloat(*args[0], pos) / state.forceFloat(*args[1], pos));
} else {
NixInt i1 = state.forceInt(*args[0], pos);

2
src/libexpr/primops/fetchMercurial.cc
View file

@ -17,7 +17,7 @@ static void prim_fetchMercurial(EvalState & state, const Pos & pos, Value * * ar
state.forceValue(*args[0]);
if (args[0]->type == tAttrs) {
if (args[0]->type() == nAttrs) {
state.forceAttrs(*args[0], pos);

19
src/libexpr/primops/fetchTree.cc
View file

@ -85,26 +85,26 @@ static void fetchTree(
state.forceValue(*args[0]);
if (args[0]->type == tAttrs) {
if (args[0]->type() == nAttrs) {
state.forceAttrs(*args[0], pos);
fetchers::Attrs attrs;
for (auto & attr : *args[0]->attrs) {
state.forceValue(*attr.value);
if (attr.value->type == tPath || attr.value->type == tString)
if (attr.value->type() == nPath || attr.value->type() == nString)
addURI(
state,
attrs,
attr.name,
state.coerceToString(*attr.pos, *attr.value, context, false, false)
);
else if (attr.value->type == tString)
else if (attr.value->type() == nString)
addURI(state, attrs, attr.name, attr.value->string.s);
else if (attr.value->type == tBool)
else if (attr.value->type() == nBool)
attrs.emplace(attr.name, Explicit<bool>{attr.value->boolean});
else if (attr.value->type == tInt)
attrs.emplace(attr.name, attr.value->integer);
else if (attr.value->type() == nInt)
attrs.emplace(attr.name, uint64_t(attr.value->integer));
else
throw TypeError("fetchTree argument '%s' is %s while a string, Boolean or integer is expected",
attr.name, showType(*attr.value));
@ -163,7 +163,7 @@ static void fetch(EvalState & state, const Pos & pos, Value * * args, Value & v,
state.forceValue(*args[0]);
if (args[0]->type == tAttrs) {
if (args[0]->type() == nAttrs) {
state.forceAttrs(*args[0], pos);
@ -324,6 +324,11 @@ static RegisterPrimOp primop_fetchGit({
A Boolean parameter that specifies whether submodules should be
checked out. Defaults to `false`.
- allRefs
Whether to fetch all refs of the repository. With this argument being
true, it's possible to load a `rev` from *any* `ref` (by default only
`rev`s from the specified `ref` are supported).
Here are some examples of how to use `fetchGit`.
- To fetch a private repository over SSH:

25
src/libexpr/value-to-json.cc
View file

@ -16,30 +16,30 @@ void printValueAsJSON(EvalState & state, bool strict,
if (strict) state.forceValue(v);
switch (v.type) {
switch (v.type()) {
case tInt:
case nInt:
out.write(v.integer);
break;
case tBool:
case nBool:
out.write(v.boolean);
break;
case tString:
case nString:
copyContext(v, context);
out.write(v.string.s);
break;
case tPath:
case nPath:
out.write(state.copyPathToStore(context, v.path));
break;
case tNull:
case nNull:
out.write(nullptr);
break;
case tAttrs: {
case nAttrs: {
auto maybeString = state.tryAttrsToString(noPos, v, context, false, false);
if (maybeString) {
out.write(*maybeString);
@ -61,7 +61,7 @@ void printValueAsJSON(EvalState & state, bool strict,
break;
}
case tList1: case tList2: case tListN: {
case nList: {
auto list(out.list());
for (unsigned int n = 0; n < v.listSize(); ++n) {
auto placeholder(list.placeholder());
@ -70,15 +70,18 @@ void printValueAsJSON(EvalState & state, bool strict,
break;
}
case tExternal:
case nExternal:
v.external->printValueAsJSON(state, strict, out, context);
break;
case tFloat:
case nFloat:
out.write(v.fpoint);
break;
default:
case nThunk:
throw TypeError("cannot convert %1% to JSON", showType(v));
case nFunction:
throw TypeError("cannot convert %1% to JSON", showType(v));
}
}

33
src/libexpr/value-to-xml.cc
View file

@ -58,31 +58,31 @@ static void printValueAsXML(EvalState & state, bool strict, bool location,
if (strict) state.forceValue(v);
switch (v.type) {
switch (v.type()) {
case tInt:
case nInt:
doc.writeEmptyElement("int", singletonAttrs("value", (format("%1%") % v.integer).str()));
break;
case tBool:
case nBool:
doc.writeEmptyElement("bool", singletonAttrs("value", v.boolean ? "true" : "false"));
break;
case tString:
case nString:
/* !!! show the context? */
copyContext(v, context);
doc.writeEmptyElement("string", singletonAttrs("value", v.string.s));
break;
case tPath:
case nPath:
doc.writeEmptyElement("path", singletonAttrs("value", v.path));
break;
case tNull:
case nNull:
doc.writeEmptyElement("null");
break;
case tAttrs:
case nAttrs:
if (state.isDerivation(v)) {
XMLAttrs xmlAttrs;
@ -92,14 +92,14 @@ static void printValueAsXML(EvalState & state, bool strict, bool location,
a = v.attrs->find(state.sDrvPath);
if (a != v.attrs->end()) {
if (strict) state.forceValue(*a->value);
if (a->value->type == tString)
if (a->value->type() == nString)
xmlAttrs["drvPath"] = drvPath = a->value->string.s;
}
a = v.attrs->find(state.sOutPath);
if (a != v.attrs->end()) {
if (strict) state.forceValue(*a->value);
if (a->value->type == tString)
if (a->value->type() == nString)
xmlAttrs["outPath"] = a->value->string.s;
}
@ -118,14 +118,19 @@ static void printValueAsXML(EvalState & state, bool strict, bool location,
break;
case tList1: case tList2: case tListN: {
case nList: {
XMLOpenElement _(doc, "list");
for (unsigned int n = 0; n < v.listSize(); ++n)
printValueAsXML(state, strict, location, *v.listElems()[n], doc, context, drvsSeen);
break;
}
case tLambda: {
case nFunction: {
if (!v.isLambda()) {
// FIXME: Serialize primops and primopapps
doc.writeEmptyElement("unevaluated");
break;
}
XMLAttrs xmlAttrs;
if (location) posToXML(xmlAttrs, v.lambda.fun->pos);
XMLOpenElement _(doc, "function", xmlAttrs);
@ -143,15 +148,15 @@ static void printValueAsXML(EvalState & state, bool strict, bool location,
break;
}
case tExternal:
case nExternal:
v.external->printValueAsXML(state, strict, location, doc, context, drvsSeen);
break;
case tFloat:
case nFloat:
doc.writeEmptyElement("float", singletonAttrs("value", (format("%1%") % v.fpoint).str()));
break;
default:
case nThunk:
doc.writeEmptyElement("unevaluated");
}
}

244
src/libexpr/value.hh
View file

@ -27,8 +27,24 @@ typedef enum {
tPrimOpApp,
tExternal,
tFloat
} ValueType;
} InternalType;
// This type abstracts over all actual value types in the language,
// grouping together implementation details like tList*, different function
// types, and types in non-normal form (so thunks and co.)
typedef enum {
nThunk,
nInt,
nFloat,
nBool,
nString,
nPath,
nNull,
nAttrs,
nList,
nFunction,
nExternal
} ValueType;
class Bindings;
struct Env;
@ -90,7 +106,28 @@ std::ostream & operator << (std::ostream & str, const ExternalValueBase & v);
struct Value
{
ValueType type;
private:
InternalType internalType;
friend std::string showType(const Value & v);
friend void printValue(std::ostream & str, std::set<const Value *> & active, const Value & v);
public:
// Functions needed to distinguish the type
// These should be removed eventually, by putting the functionality that's
// needed by callers into methods of this type
// type() == nThunk
inline bool isThunk() const { return internalType == tThunk; };
inline bool isApp() const { return internalType == tApp; };
inline bool isBlackhole() const { return internalType == tBlackhole; };
// type() == nFunction
inline bool isLambda() const { return internalType == tLambda; };
inline bool isPrimOp() const { return internalType == tPrimOp; };
inline bool isPrimOpApp() const { return internalType == tPrimOpApp; };
union
{
NixInt integer;
@ -147,24 +184,161 @@ struct Value
NixFloat fpoint;
};
// Returns the normal type of a Value. This only returns nThunk if the
// Value hasn't been forceValue'd
inline ValueType type() const
{
switch (internalType) {
case tInt: return nInt;
case tBool: return nBool;
case tString: return nString;
case tPath: return nPath;
case tNull: return nNull;
case tAttrs: return nAttrs;
case tList1: case tList2: case tListN: return nList;
case tLambda: case tPrimOp: case tPrimOpApp: return nFunction;
case tExternal: return nExternal;
case tFloat: return nFloat;
case tThunk: case tApp: case tBlackhole: return nThunk;
}
abort();
}
/* After overwriting an app node, be sure to clear pointers in the
Value to ensure that the target isn't kept alive unnecessarily. */
inline void clearValue()
{
app.left = app.right = 0;
}
inline void mkInt(NixInt n)
{
clearValue();
internalType = tInt;
integer = n;
}
inline void mkBool(bool b)
{
clearValue();
internalType = tBool;
boolean = b;
}
inline void mkString(const char * s, const char * * context = 0)
{
internalType = tString;
string.s = s;
string.context = context;
}
inline void mkPath(const char * s)
{
clearValue();
internalType = tPath;
path = s;
}
inline void mkNull()
{
clearValue();
internalType = tNull;
}
inline void mkAttrs(Bindings * a)
{
clearValue();
internalType = tAttrs;
attrs = a;
}
inline void mkList(size_t size)
{
clearValue();
if (size == 1)
internalType = tList1;
else if (size == 2)
internalType = tList2;
else {
internalType = tListN;
bigList.size = size;
}
}
inline void mkThunk(Env * e, Expr * ex)
{
internalType = tThunk;
thunk.env = e;
thunk.expr = ex;
}
inline void mkApp(Value * l, Value * r)
{
internalType = tApp;
app.left = l;
app.right = r;
}
inline void mkLambda(Env * e, ExprLambda * f)
{
internalType = tLambda;
lambda.env = e;
lambda.fun = f;
}
inline void mkBlackhole()
{
internalType = tBlackhole;
// Value will be overridden anyways
}
inline void mkPrimOp(PrimOp * p)
{
clearValue();
internalType = tPrimOp;
primOp = p;
}
inline void mkPrimOpApp(Value * l, Value * r)
{
internalType = tPrimOpApp;
app.left = l;
app.right = r;
}
inline void mkExternal(ExternalValueBase * e)
{
clearValue();
internalType = tExternal;
external = e;
}
inline void mkFloat(NixFloat n)
{
clearValue();
internalType = tFloat;
fpoint = n;
}
bool isList() const
{
return type == tList1 || type == tList2 || type == tListN;
return internalType == tList1 || internalType == tList2 || internalType == tListN;
}
Value * * listElems()
{
return type == tList1 || type == tList2 ? smallList : bigList.elems;
return internalType == tList1 || internalType == tList2 ? smallList : bigList.elems;
}
const Value * const * listElems() const
{
return type == tList1 || type == tList2 ? smallList : bigList.elems;
return internalType == tList1 || internalType == tList2 ? smallList : bigList.elems;
}
size_t listSize() const
{
return type == tList1 ? 1 : type == tList2 ? 2 : bigList.size;
return internalType == tList1 ? 1 : internalType == tList2 ? 2 : bigList.size;
}
/* Check whether forcing this value requires a trivial amount of
@ -176,86 +350,42 @@ struct Value
};
/* After overwriting an app node, be sure to clear pointers in the
Value to ensure that the target isn't kept alive unnecessarily. */
static inline void clearValue(Value & v)
{
v.app.left = v.app.right = 0;
}
// TODO: Remove these static functions, replace call sites with v.mk* instead
static inline void mkInt(Value & v, NixInt n)
{
clearValue(v);
v.type = tInt;
v.integer = n;
v.mkInt(n);
}
static inline void mkFloat(Value & v, NixFloat n)
{
clearValue(v);
v.type = tFloat;
v.fpoint = n;
v.mkFloat(n);
}
static inline void mkBool(Value & v, bool b)
{
clearValue(v);
v.type = tBool;
v.boolean = b;
v.mkBool(b);
}
static inline void mkNull(Value & v)
{
clearValue(v);
v.type = tNull;
v.mkNull();
}
static inline void mkApp(Value & v, Value & left, Value & right)
{
v.type = tApp;
v.app.left = &left;
v.app.right = &right;
v.mkApp(&left, &right);
}
static inline void mkPrimOpApp(Value & v, Value & left, Value & right)
{
v.type = tPrimOpApp;
v.app.left = &left;
v.app.right = &right;
}
static inline void mkStringNoCopy(Value & v, const char * s)
{
v.type = tString;
v.string.s = s;
v.string.context = 0;
}
static inline void mkString(Value & v, const Symbol & s)
{
mkStringNoCopy(v, ((const string &) s).c_str());
v.mkString(((const string &) s).c_str());
}
void mkString(Value & v, const char * s);
static inline void mkPathNoCopy(Value & v, const char * s)
{
clearValue(v);
v.type = tPath;
v.path = s;
}
void mkPath(Value & v, const char * s);

4
src/libfetchers/attrs.cc
View file

@ -11,11 +11,11 @@ Attrs jsonToAttrs(const nlohmann::json & json)
for (auto & i : json.items()) {
if (i.value().is_number())
attrs.emplace(i.key(), i.value().get<int64_t>());
attrs.emplace(i.key(), i.value().get<uint64_t>());
else if (i.value().is_string())
attrs.emplace(i.key(), i.value().get<std::string>());
else if (i.value().is_boolean())
attrs.emplace(i.key(), i.value().get<bool>());
attrs.emplace(i.key(), Explicit<bool> { i.value().get<bool>() });
else
throw Error("unsupported input attribute type in lock file");
}

49
src/libfetchers/git.cc
View file

@ -59,12 +59,13 @@ struct GitInputScheme : InputScheme
if (maybeGetStrAttr(attrs, "type") != "git") return {};
for (auto & [name, value] : attrs)
if (name != "type" && name != "url" && name != "ref" && name != "rev" && name != "shallow" && name != "submodules" && name != "lastModified" && name != "revCount" && name != "narHash")
if (name != "type" && name != "url" && name != "ref" && name != "rev" && name != "shallow" && name != "submodules" && name != "lastModified" && name != "revCount" && name != "narHash" && name != "allRefs")
throw Error("unsupported Git input attribute '%s'", name);
parseURL(getStrAttr(attrs, "url"));
maybeGetBoolAttr(attrs, "shallow");
maybeGetBoolAttr(attrs, "submodules");
maybeGetBoolAttr(attrs, "allRefs");
if (auto ref = maybeGetStrAttr(attrs, "ref")) {
if (std::regex_search(*ref, badGitRefRegex))
@ -169,10 +170,12 @@ struct GitInputScheme : InputScheme
bool shallow = maybeGetBoolAttr(input.attrs, "shallow").value_or(false);
bool submodules = maybeGetBoolAttr(input.attrs, "submodules").value_or(false);
bool allRefs = maybeGetBoolAttr(input.attrs, "allRefs").value_or(false);
std::string cacheType = "git";
if (shallow) cacheType += "-shallow";
if (submodules) cacheType += "-submodules";
if (allRefs) cacheType += "-all-refs";
auto getImmutableAttrs = [&]()
{
@ -338,11 +341,15 @@ struct GitInputScheme : InputScheme
}
}
} else {
/* If the local ref is older than ‘tarball-ttl’ seconds, do a
git fetch to update the local ref to the remote ref. */
struct stat st;
doFetch = stat(localRefFile.c_str(), &st) != 0 ||
(uint64_t) st.st_mtime + settings.tarballTtl <= (uint64_t) now;
if (allRefs) {
doFetch = true;
} else {
/* If the local ref is older than ‘tarball-ttl’ seconds, do a
git fetch to update the local ref to the remote ref. */
struct stat st;
doFetch = stat(localRefFile.c_str(), &st) != 0 ||
(uint64_t) st.st_mtime + settings.tarballTtl <= (uint64_t) now;
}
}
if (doFetch) {
@ -352,9 +359,11 @@ struct GitInputScheme : InputScheme
// we're using --quiet for now. Should process its stderr.
try {
auto ref = input.getRef();
auto fetchRef = ref->compare(0, 5, "refs/") == 0
? *ref
: "refs/heads/" + *ref;
auto fetchRef = allRefs
? "refs/*"
: ref->compare(0, 5, "refs/") == 0
? *ref
: "refs/heads/" + *ref;
runProgram("git", true, { "-C", repoDir, "fetch", "--quiet", "--force", "--", actualUrl, fmt("%s:%s", fetchRef, fetchRef) });
} catch (Error & e) {
if (!pathExists(localRefFile)) throw;
@ -392,6 +401,28 @@ struct GitInputScheme : InputScheme
AutoDelete delTmpDir(tmpDir, true);
PathFilter filter = defaultPathFilter;
RunOptions checkCommitOpts(
"git",
{ "-C", repoDir, "cat-file", "commit", input.getRev()->gitRev() }
);
checkCommitOpts.searchPath = true;
checkCommitOpts.mergeStderrToStdout = true;
auto result = runProgram(checkCommitOpts);
if (WEXITSTATUS(result.first) == 128
&& result.second.find("bad file") != std::string::npos
) {
throw Error(
"Cannot find Git revision '%s' in ref '%s' of repository '%s'! "
"Please make sure that the " ANSI_BOLD "rev" ANSI_NORMAL " exists on the "
ANSI_BOLD "ref" ANSI_NORMAL " you've specified or add " ANSI_BOLD
"allRefs = true;" ANSI_NORMAL " to " ANSI_BOLD "fetchGit" ANSI_NORMAL ".",
input.getRev()->gitRev(),
*input.getRef(),
actualUrl
);
}
if (submodules) {
Path tmpGitDir = createTempDir();
AutoDelete delTmpGitDir(tmpGitDir, true);

24
src/libfetchers/github.cc
View file

@ -37,15 +37,29 @@ struct GitArchiveInputScheme : InputScheme
std::optional<std::string> ref;
std::optional<std::string> host_url;
if (path.size() == 2) {
} else if (path.size() == 3) {
auto size = path.size();
if (size == 3) {
if (std::regex_match(path[2], revRegex))
rev = Hash::parseAny(path[2], htSHA1);
else if (std::regex_match(path[2], refRegex))
ref = path[2];
else
throw BadURL("in URL '%s', '%s' is not a commit hash or branch/tag name", url.url, path[2]);
} else
} else if (size > 3) {
std::string rs;
for (auto i = std::next(path.begin(), 2); i != path.end(); i++) {
rs += *i;
if (std::next(i) != path.end()) {
rs += "/";
}
}
if (std::regex_match(rs, refRegex)) {
ref = rs;
} else {
throw BadURL("in URL '%s', '%s' is not a branch/tag name", url.url, rs);
}
} else if (size < 2)
throw BadURL("URL '%s' is invalid", url.url);
for (auto &[name, value] : url.query) {
@ -195,14 +209,14 @@ struct GitArchiveInputScheme : InputScheme
auto [tree, lastModified] = downloadTarball(store, url.url, "source", true, url.headers);
input.attrs.insert_or_assign("lastModified", lastModified);
input.attrs.insert_or_assign("lastModified", uint64_t(lastModified));
getCache()->add(
store,
immutableAttrs,
{
{"rev", rev->gitRev()},
{"lastModified", lastModified}
{"lastModified", uint64_t(lastModified)}
},
tree.storePath,
true);

2
src/libfetchers/mercurial.cc
View file

@ -301,7 +301,7 @@ struct MercurialInputScheme : InputScheme
Attrs infoAttrs({
{"rev", input.getRev()->gitRev()},
{"revCount", (int64_t) revCount},
{"revCount", (uint64_t) revCount},
});
if (!_input.getRev())

6
src/libfetchers/path.cc
View file

@ -20,10 +20,10 @@ struct PathInputScheme : InputScheme
if (name == "rev" || name == "narHash")
input.attrs.insert_or_assign(name, value);
else if (name == "revCount" || name == "lastModified") {
uint64_t n;
if (!string2Int(value, n))
if (auto n = string2Int<uint64_t>(value))
input.attrs.insert_or_assign(name, *n);
else
throw Error("path URL '%s' has invalid parameter '%s'", url.to_string(), name);
input.attrs.insert_or_assign(name, n);
}
else
throw Error("path URL '%s' has unsupported parameter '%s'", url.to_string(), name);

2
src/libfetchers/tarball.cc
View file

@ -152,7 +152,7 @@ std::pair<Tree, time_t> downloadTarball(
}
Attrs infoAttrs({
{"lastModified", lastModified},
{"lastModified", uint64_t(lastModified)},
{"etag", res.etag},
});

13
src/libmain/common-args.cc
View file

@ -10,25 +10,25 @@ MixCommonArgs::MixCommonArgs(const string & programName)
addFlag({
.longName = "verbose",
.shortName = 'v',
.description = "increase verbosity level",
.description = "Increase the logging verbosity level.",
.handler = {[]() { verbosity = (Verbosity) (verbosity + 1); }},
});
addFlag({
.longName = "quiet",
.description = "decrease verbosity level",
.description = "Decrease the logging verbosity level.",
.handler = {[]() { verbosity = verbosity > lvlError ? (Verbosity) (verbosity - 1) : lvlError; }},
});
addFlag({
.longName = "debug",
.description = "enable debug output",
.description = "Set the logging verbosity level to 'debug'.",
.handler = {[]() { verbosity = lvlDebug; }},
});
addFlag({
.longName = "option",
.description = "set a Nix configuration option (overriding `nix.conf`)",
.description = "Set the Nix configuration setting *name* to *value* (overriding `nix.conf`).",
.labels = {"name", "value"},
.handler = {[](std::string name, std::string value) {
try {
@ -51,8 +51,7 @@ MixCommonArgs::MixCommonArgs(const string & programName)
addFlag({
.longName = "log-format",
.description = "format of log output; `raw`, `internal-json`, `bar` "
"or `bar-with-logs`",
.description = "Set the format of log output; one of `raw`, `internal-json`, `bar` or `bar-with-logs`.",
.labels = {"format"},
.handler = {[](std::string format) { setLogFormat(format); }},
});
@ -60,7 +59,7 @@ MixCommonArgs::MixCommonArgs(const string & programName)
addFlag({
.longName = "max-jobs",
.shortName = 'j',
.description = "maximum number of parallel builds",
.description = "The maximum number of parallel builds.",
.labels = Strings{"jobs"},
.handler = {[=](std::string s) {
settings.set("max-jobs", s);

4
src/libmain/common-args.hh
View file

@ -16,7 +16,7 @@ struct MixDryRun : virtual Args
MixDryRun()
{
mkFlag(0, "dry-run", "show what this command would do without doing it", &dryRun);
mkFlag(0, "dry-run", "Show what this command would do without doing it.", &dryRun);
}
};
@ -26,7 +26,7 @@ struct MixJSON : virtual Args
MixJSON()
{
mkFlag(0, "json", "produce JSON output", &json);
mkFlag(0, "json", "Produce output in JSON format, suitable for consumption by another program.", &json);
}
};

41
src/libmain/shared.cc
View file

@ -18,6 +18,8 @@
#include <openssl/crypto.h>
#include <sodium.h>
namespace nix {
@ -126,6 +128,9 @@ void initNix()
CRYPTO_set_locking_callback(opensslLockCallback);
#endif
if (sodium_init() == -1)
throw Error("could not initialise libsodium");
loadConfFile();
startSignalHandlerThread();
@ -181,50 +186,58 @@ LegacyArgs::LegacyArgs(const std::string & programName,
addFlag({
.longName = "no-build-output",
.shortName = 'Q',
.description = "do not show build output",
.description = "Do not show build output.",
.handler = {[&]() {setLogFormat(LogFormat::raw); }},
});
addFlag({
.longName = "keep-failed",
.shortName ='K',
.description = "keep temporary directories of failed builds",
.description = "Keep temporary directories of failed builds.",
.handler = {&(bool&) settings.keepFailed, true},
});
addFlag({
.longName = "keep-going",
.shortName ='k',
.description = "keep going after a build fails",
.description = "Keep going after a build fails.",
.handler = {&(bool&) settings.keepGoing, true},
});
addFlag({
.longName = "fallback",
.description = "build from source if substitution fails",
.description = "Build from source if substitution fails.",
.handler = {&(bool&) settings.tryFallback, true},
});
auto intSettingAlias = [&](char shortName, const std::string & longName,
const std::string & description, const std::string & dest) {
mkFlag<unsigned int>(shortName, longName, description, [=](unsigned int n) {
settings.set(dest, std::to_string(n));
const std::string & description, const std::string & dest)
{
addFlag({
.longName = longName,
.shortName = shortName,
.description = description,
.labels = {"n"},
.handler = {[=](std::string s) {
auto n = string2IntWithUnitPrefix<uint64_t>(s);
settings.set(dest, std::to_string(n));
}}
});
};
intSettingAlias(0, "cores", "maximum number of CPU cores to use inside a build", "cores");
intSettingAlias(0, "max-silent-time", "number of seconds of silence before a build is killed", "max-silent-time");
intSettingAlias(0, "timeout", "number of seconds before a build is killed", "timeout");
intSettingAlias(0, "cores", "Maximum number of CPU cores to use inside a build.", "cores");
intSettingAlias(0, "max-silent-time", "Number of seconds of silence before a build is killed.", "max-silent-time");
intSettingAlias(0, "timeout", "Number of seconds before a build is killed.", "timeout");
mkFlag(0, "readonly-mode", "do not write to the Nix store",
mkFlag(0, "readonly-mode", "Do not write to the Nix store.",
&settings.readOnlyMode);
mkFlag(0, "no-gc-warning", "disable warning about not using '--add-root'",
mkFlag(0, "no-gc-warning", "Disable warnings about not using `--add-root`.",
&gcWarning, false);
addFlag({
.longName = "store",
.description = "URI of the Nix store to use",
.description = "The URL of the Nix store to use.",
.labels = {"store-uri"},
.handler = {&(std::string&) settings.storeUri},
});
@ -274,9 +287,7 @@ void printVersion(const string & programName)
#if HAVE_BOEHMGC
cfg.push_back("gc");
#endif
#if HAVE_SODIUM
cfg.push_back("signed-caches");
#endif
std::cout << "System type: " << settings.thisSystem << "\n";
std::cout << "Additional system types: " << concatStringsSep(", ", settings.extraPlatforms.get()) << "\n";
std::cout << "Features: " << concatStringsSep(", ", cfg) << "\n";

18
src/libmain/shared.hh
View file

@ -57,23 +57,7 @@ template<class N> N getIntArg(const string & opt,
{
++i;
if (i == end) throw UsageError("'%1%' requires an argument", opt);
string s = *i;
N multiplier = 1;
if (allowUnit && !s.empty()) {
char u = std::toupper(*s.rbegin());
if (std::isalpha(u)) {
if (u == 'K') multiplier = 1ULL << 10;
else if (u == 'M') multiplier = 1ULL << 20;
else if (u == 'G') multiplier = 1ULL << 30;
else if (u == 'T') multiplier = 1ULL << 40;
else throw UsageError("invalid unit specifier '%1%'", u);
s.resize(s.size() - 1);
}
}
N n;
if (!string2Int(s, n))
throw UsageError("'%1%' requires an integer argument", opt);
return n * multiplier;
return string2IntWithUnitPrefix<N>(*i);
}

2
src/libstore/binary-cache-store.hh
View file

@ -24,7 +24,7 @@ struct BinaryCacheStoreConfig : virtual StoreConfig
"enable multi-threading compression, available for xz only currently"};
};
class BinaryCacheStore : public Store, public virtual BinaryCacheStoreConfig
class BinaryCacheStore : public virtual BinaryCacheStoreConfig, public virtual Store
{
private:

52
src/libstore/build/derivation-goal.cc
View file

@ -50,6 +50,11 @@
#define pivot_root(new_root, put_old) (syscall(SYS_pivot_root, new_root, put_old))
#endif
#if __APPLE__
#include <spawn.h>
#include <sys/sysctl.h>
#endif
#include <pwd.h>
#include <grp.h>
@ -675,13 +680,9 @@ void DerivationGoal::tryToBuild()
}
void DerivationGoal::tryLocalBuild() {
bool buildLocally = buildMode != bmNormal || parsedDrv->willBuildLocally(worker.store);
/* Make sure that we are allowed to start a build. If this
derivation prefers to be done locally, do it even if
maxBuildJobs is 0. */
/* Make sure that we are allowed to start a build. */
unsigned int curBuilds = worker.getNrLocalBuilds();
if (curBuilds >= settings.maxBuildJobs && !(buildLocally && curBuilds == 0)) {
if (curBuilds >= settings.maxBuildJobs) {
worker.waitForBuildSlot(shared_from_this());
outputLocks.unlock();
return;
@ -1695,12 +1696,10 @@ void DerivationGoal::startBuilder()
userNamespaceSync.writeSide = -1;
});
pid_t tmp;
auto ss = tokenizeString<std::vector<std::string>>(readLine(builderOut.readSide.get()));
assert(ss.size() == 2);
usingUserNamespace = ss[0] == "1";
if (!string2Int<pid_t>(ss[1], tmp)) abort();
pid = tmp;
pid = string2Int<pid_t>(ss[1]).value();
if (usingUserNamespace) {
/* Set the UID/GID mapping of the builder's user namespace
@ -1985,7 +1984,7 @@ void DerivationGoal::writeStructuredAttrs()
chownToBuilder(tmpDir + "/.attrs.sh");
}
struct RestrictedStoreConfig : LocalFSStoreConfig
struct RestrictedStoreConfig : virtual LocalFSStoreConfig
{
using LocalFSStoreConfig::LocalFSStoreConfig;
const std::string name() { return "Restricted Store"; }
@ -1994,14 +1993,19 @@ struct RestrictedStoreConfig : LocalFSStoreConfig
/* A wrapper around LocalStore that only allows building/querying of
paths that are in the input closures of the build or were added via
recursive Nix calls. */
struct RestrictedStore : public LocalFSStore, public virtual RestrictedStoreConfig
struct RestrictedStore : public virtual RestrictedStoreConfig, public virtual LocalFSStore
{
ref<LocalStore> next;
DerivationGoal & goal;
RestrictedStore(const Params & params, ref<LocalStore> next, DerivationGoal & goal)
: StoreConfig(params), Store(params), LocalFSStore(params), next(next), goal(goal)
: StoreConfig(params)
, LocalFSStoreConfig(params)
, RestrictedStoreConfig(params)
, Store(params)
, LocalFSStore(params)
, next(next), goal(goal)
{ }
Path getRealStoreDir() override
@ -2852,7 +2856,31 @@ void DerivationGoal::runChild()
}
}
#if __APPLE__
posix_spawnattr_t attrp;
if (posix_spawnattr_init(&attrp))
throw SysError("failed to initialize builder");
if (posix_spawnattr_setflags(&attrp, POSIX_SPAWN_SETEXEC))
throw SysError("failed to initialize builder");
if (drv->platform == "aarch64-darwin") {
// Unset kern.curproc_arch_affinity so we can escape Rosetta
int affinity = 0;
sysctlbyname("kern.curproc_arch_affinity", NULL, NULL, &affinity, sizeof(affinity));
cpu_type_t cpu = CPU_TYPE_ARM64;
posix_spawnattr_setbinpref_np(&attrp, 1, &cpu, NULL);
} else if (drv->platform == "x86_64-darwin") {
cpu_type_t cpu = CPU_TYPE_X86_64;
posix_spawnattr_setbinpref_np(&attrp, 1, &cpu, NULL);
}
posix_spawn(NULL, builder, NULL, &attrp, stringsToCharPtrs(args).data(), stringsToCharPtrs(envStrs).data());
#else
execve(builder, stringsToCharPtrs(args).data(), stringsToCharPtrs(envStrs).data());
#endif
throw SysError("executing '%1%'", drv->builder);

54
src/libstore/crypto.cc
View file

@ -2,21 +2,19 @@
#include "util.hh"
#include "globals.hh"
#if HAVE_SODIUM
#include <sodium.h>
#endif
namespace nix {
static std::pair<std::string, std::string> split(const string & s)
static std::pair<std::string_view, std::string_view> split(std::string_view s)
{
size_t colon = s.find(':');
if (colon == std::string::npos || colon == 0)
return {"", ""};
return {std::string(s, 0, colon), std::string(s, colon + 1)};
return {s.substr(0, colon), s.substr(colon + 1)};
}
Key::Key(const string & s)
Key::Key(std::string_view s)
{
auto ss = split(s);
@ -29,62 +27,57 @@ Key::Key(const string & s)
key = base64Decode(key);
}
SecretKey::SecretKey(const string & s)
std::string Key::to_string() const
{
return name + ":" + base64Encode(key);
}
SecretKey::SecretKey(std::string_view s)
: Key(s)
{
#if HAVE_SODIUM
if (key.size() != crypto_sign_SECRETKEYBYTES)
throw Error("secret key is not valid");
#endif
}
#if !HAVE_SODIUM
[[noreturn]] static void noSodium()
std::string SecretKey::signDetached(std::string_view data) const
{
throw Error("Nix was not compiled with libsodium, required for signed binary cache support");
}
#endif
std::string SecretKey::signDetached(const std::string & data) const
{
#if HAVE_SODIUM
unsigned char sig[crypto_sign_BYTES];
unsigned long long sigLen;
crypto_sign_detached(sig, &sigLen, (unsigned char *) data.data(), data.size(),
(unsigned char *) key.data());
return name + ":" + base64Encode(std::string((char *) sig, sigLen));
#else
noSodium();
#endif
}
PublicKey SecretKey::toPublicKey() const
{
#if HAVE_SODIUM
unsigned char pk[crypto_sign_PUBLICKEYBYTES];
crypto_sign_ed25519_sk_to_pk(pk, (unsigned char *) key.data());
return PublicKey(name, std::string((char *) pk, crypto_sign_PUBLICKEYBYTES));
#else
noSodium();
#endif
}
PublicKey::PublicKey(const string & s)
SecretKey SecretKey::generate(std::string_view name)
{
unsigned char pk[crypto_sign_PUBLICKEYBYTES];
unsigned char sk[crypto_sign_SECRETKEYBYTES];
if (crypto_sign_keypair(pk, sk) != 0)
throw Error("key generation failed");
return SecretKey(name, std::string((char *) sk, crypto_sign_SECRETKEYBYTES));
}
PublicKey::PublicKey(std::string_view s)
: Key(s)
{
#if HAVE_SODIUM
if (key.size() != crypto_sign_PUBLICKEYBYTES)
throw Error("public key is not valid");
#endif
}
bool verifyDetached(const std::string & data, const std::string & sig,
const PublicKeys & publicKeys)
{
#if HAVE_SODIUM
auto ss = split(sig);
auto key = publicKeys.find(ss.first);
auto key = publicKeys.find(std::string(ss.first));
if (key == publicKeys.end()) return false;
auto sig2 = base64Decode(ss.second);
@ -94,9 +87,6 @@ bool verifyDetached(const std::string & data, const std::string & sig,
return crypto_sign_verify_detached((unsigned char *) sig2.data(),
(unsigned char *) data.data(), data.size(),
(unsigned char *) key->second.key.data()) == 0;
#else
noSodium();
#endif
}
PublicKeys getDefaultPublicKeys()

24
src/libstore/crypto.hh
View file

@ -13,32 +13,40 @@ struct Key
/* Construct Key from a string in the format
‘<name>:<key-in-base64>’. */
Key(const std::string & s);
Key(std::string_view s);
std::string to_string() const;
protected:
Key(const std::string & name, const std::string & key)
: name(name), key(key) { }
Key(std::string_view name, std::string && key)
: name(name), key(std::move(key)) { }
};
struct PublicKey;
struct SecretKey : Key
{
SecretKey(const std::string & s);
SecretKey(std::string_view s);
/* Return a detached signature of the given string. */
std::string signDetached(const std::string & s) const;
std::string signDetached(std::string_view s) const;
PublicKey toPublicKey() const;
static SecretKey generate(std::string_view name);
private:
SecretKey(std::string_view name, std::string && key)
: Key(name, std::move(key)) { }
};
struct PublicKey : Key
{
PublicKey(const std::string & data);
PublicKey(std::string_view data);
private:
PublicKey(const std::string & name, const std::string & key)
: Key(name, key) { }
PublicKey(std::string_view name, std::string && key)
: Key(name, std::move(key)) { }
friend struct SecretKey;
};

3
src/libstore/dummy-store.cc
View file

@ -9,7 +9,7 @@ struct DummyStoreConfig : virtual StoreConfig {
const std::string name() override { return "Dummy Store"; }
};
struct DummyStore : public Store, public virtual DummyStoreConfig
struct DummyStore : public virtual DummyStoreConfig, public virtual Store
{
DummyStore(const std::string scheme, const std::string uri, const Params & params)
: DummyStore(params)
@ -17,6 +17,7 @@ struct DummyStore : public Store, public virtual DummyStoreConfig
DummyStore(const Params & params)
: StoreConfig(params)
, DummyStoreConfig(params)
, Store(params)
{ }

2
src/libstore/filetransfer.hh
View file

@ -63,7 +63,7 @@ struct FileTransferRequest
std::string mimeType;
std::function<void(std::string_view data)> dataCallback;
FileTransferRequest(const std::string & uri)
FileTransferRequest(std::string_view uri)
: uri(uri), parentAct(getCurActivity()) { }
std::string verb()

9
src/libstore/fs-accessor.hh
View file

@ -25,7 +25,14 @@ public:
virtual StringSet readDirectory(const Path & path) = 0;
virtual std::string readFile(const Path & path) = 0;
/**
* Read a file inside the store.
*
* If `requireValidPath` is set to `true` (the default), the path must be
* inside a valid store path, otherwise it just needs to be physically
* present (but not necessarily properly registered)
*/
virtual std::string readFile(const Path & path, bool requireValidPath = true) = 0;
virtual std::string readLink(const Path & path) = 0;
};

30
src/libstore/globals.cc
View file

@ -131,6 +131,28 @@ StringSet Settings::getDefaultSystemFeatures()
return features;
}
StringSet Settings::getDefaultExtraPlatforms()
{
if (std::string{SYSTEM} == "x86_64-linux" && !isWSL1())
return StringSet{"i686-linux"};
#if __APPLE__
// Rosetta 2 emulation layer can run x86_64 binaries on aarch64
// machines. Note that we can’t force processes from executing
// x86_64 in aarch64 environments or vice versa since they can
// always exec with their own binary preferences.
else if (pathExists("/Library/Apple/System/Library/LaunchDaemons/com.apple.oahd.plist")) {
if (std::string{SYSTEM} == "x86_64-darwin")
return StringSet{"aarch64-darwin"};
else if (std::string{SYSTEM} == "aarch64-darwin")
return StringSet{"x86_64-darwin"};
else
return StringSet{};
}
#endif
else
return StringSet{};
}
bool Settings::isExperimentalFeatureEnabled(const std::string & name)
{
auto & f = experimentalFeatures.get();
@ -206,8 +228,12 @@ template<> void BaseSetting<SandboxMode>::convertToArg(Args & args, const std::s
void MaxBuildJobsSetting::set(const std::string & str, bool append)
{
if (str == "auto") value = std::max(1U, std::thread::hardware_concurrency());
else if (!string2Int(str, value))
throw UsageError("configuration setting '%s' should be 'auto' or an integer", name);
else {
if (auto n = string2Int<decltype(value)>(str))
value = *n;
else
throw UsageError("configuration setting '%s' should be 'auto' or an integer", name);
}
}

4
src/libstore/globals.hh
View file

@ -34,6 +34,8 @@ class Settings : public Config {
StringSet getDefaultSystemFeatures();
StringSet getDefaultExtraPlatforms();
bool isWSL1();
public:
@ -545,7 +547,7 @@ public:
Setting<StringSet> extraPlatforms{
this,
std::string{SYSTEM} == "x86_64-linux" && !isWSL1() ? StringSet{"i686-linux"} : StringSet{},
getDefaultExtraPlatforms(),
"extra-platforms",
R"(
Platforms other than the native one which this machine is capable of

5
src/libstore/http-binary-cache-store.cc
View file

@ -15,7 +15,7 @@ struct HttpBinaryCacheStoreConfig : virtual BinaryCacheStoreConfig
const std::string name() override { return "Http Binary Cache Store"; }
};
class HttpBinaryCacheStore : public BinaryCacheStore, public HttpBinaryCacheStoreConfig
class HttpBinaryCacheStore : public virtual HttpBinaryCacheStoreConfig, public virtual BinaryCacheStore
{
private:
@ -36,6 +36,9 @@ public:
const Path & _cacheUri,
const Params & params)
: StoreConfig(params)
, BinaryCacheStoreConfig(params)
, HttpBinaryCacheStoreConfig(params)
, Store(params)
, BinaryCacheStore(params)
, cacheUri(scheme + "://" + _cacheUri)
{

3
src/libstore/legacy-ssh-store.cc
View file

@ -22,7 +22,7 @@ struct LegacySSHStoreConfig : virtual StoreConfig
const std::string name() override { return "Legacy SSH Store"; }
};
struct LegacySSHStore : public Store, public virtual LegacySSHStoreConfig
struct LegacySSHStore : public virtual LegacySSHStoreConfig, public virtual Store
{
// Hack for getting remote build log output.
// Intentionally not in `LegacySSHStoreConfig` so that it doesn't appear in
@ -48,6 +48,7 @@ struct LegacySSHStore : public Store, public virtual LegacySSHStoreConfig
LegacySSHStore(const string & scheme, const string & host, const Params & params)
: StoreConfig(params)
, LegacySSHStoreConfig(params)
, Store(params)
, host(host)
, connections(make_ref<Pool<Connection>>(

5
src/libstore/local-binary-cache-store.cc
View file

@ -11,7 +11,7 @@ struct LocalBinaryCacheStoreConfig : virtual BinaryCacheStoreConfig
const std::string name() override { return "Local Binary Cache Store"; }
};
class LocalBinaryCacheStore : public BinaryCacheStore, public virtual LocalBinaryCacheStoreConfig
class LocalBinaryCacheStore : public virtual LocalBinaryCacheStoreConfig, public virtual BinaryCacheStore
{
private:
@ -24,6 +24,9 @@ public:
const Path & binaryCacheDir,
const Params & params)
: StoreConfig(params)
, BinaryCacheStoreConfig(params)
, LocalBinaryCacheStoreConfig(params)
, Store(params)
, BinaryCacheStore(params)
, binaryCacheDir(binaryCacheDir)
{

8
src/libstore/local-fs-store.cc
View file

@ -19,10 +19,10 @@ struct LocalStoreAccessor : public FSAccessor
LocalStoreAccessor(ref<LocalFSStore> store) : store(store) { }
Path toRealPath(const Path & path)
Path toRealPath(const Path & path, bool requireValidPath = true)
{
auto storePath = store->toStorePath(path).first;
if (!store->isValidPath(storePath))
if (requireValidPath && !store->isValidPath(storePath))
throw InvalidPath("path '%1%' is not a valid store path", store->printStorePath(storePath));
return store->getRealStoreDir() + std::string(path, store->storeDir.size());
}
@ -61,9 +61,9 @@ struct LocalStoreAccessor : public FSAccessor
return res;
}
std::string readFile(const Path & path) override
std::string readFile(const Path & path, bool requireValidPath = true) override
{
return nix::readFile(toRealPath(path));
return nix::readFile(toRealPath(path, requireValidPath));
}
std::string readLink(const Path & path) override

2
src/libstore/local-fs-store.hh
View file

@ -20,7 +20,7 @@ struct LocalFSStoreConfig : virtual StoreConfig
"log", "directory where Nix will store state"};
};
class LocalFSStore : public virtual Store, public virtual LocalFSStoreConfig
class LocalFSStore : public virtual LocalFSStoreConfig, public virtual Store
{
public:

103
src/libstore/local-store.cc
View file

@ -66,8 +66,10 @@ int getSchema(Path schemaPath)
int curSchema = 0;
if (pathExists(schemaPath)) {
string s = readFile(schemaPath);
if (!string2Int(s, curSchema))
auto n = string2Int<int>(s);
if (!n)
throw Error("'%1%' is corrupt", schemaPath);
curSchema = *n;
}
return curSchema;
}
@ -100,6 +102,8 @@ void migrateCASchema(SQLite& db, Path schemaPath, AutoCloseFD& lockFd)
LocalStore::LocalStore(const Params & params)
: StoreConfig(params)
, LocalFSStoreConfig(params)
, LocalStoreConfig(params)
, Store(params)
, LocalFSStore(params)
, realStoreDir_{this, false, rootDir != "" ? rootDir + "/nix/store" : storeDir, "real",
@ -734,57 +738,62 @@ void LocalStore::queryPathInfoUncached(const StorePath & path,
Callback<std::shared_ptr<const ValidPathInfo>> callback) noexcept
{
try {
callback(retrySQLite<std::shared_ptr<ValidPathInfo>>([&]() {
callback(retrySQLite<std::shared_ptr<const ValidPathInfo>>([&]() {
auto state(_state.lock());
/* Get the path info. */
auto useQueryPathInfo(state->stmts->QueryPathInfo.use()(printStorePath(path)));
if (!useQueryPathInfo.next())
return std::shared_ptr<ValidPathInfo>();
auto id = useQueryPathInfo.getInt(0);
auto narHash = Hash::dummy;
try {
narHash = Hash::parseAnyPrefixed(useQueryPathInfo.getStr(1));
} catch (BadHash & e) {
throw Error("invalid-path entry for '%s': %s", printStorePath(path), e.what());
}
auto info = std::make_shared<ValidPathInfo>(path, narHash);
info->id = id;
info->registrationTime = useQueryPathInfo.getInt(2);
auto s = (const char *) sqlite3_column_text(state->stmts->QueryPathInfo, 3);
if (s) info->deriver = parseStorePath(s);
/* Note that narSize = NULL yields 0. */
info->narSize = useQueryPathInfo.getInt(4);
info->ultimate = useQueryPathInfo.getInt(5) == 1;
s = (const char *) sqlite3_column_text(state->stmts->QueryPathInfo, 6);
if (s) info->sigs = tokenizeString<StringSet>(s, " ");
s = (const char *) sqlite3_column_text(state->stmts->QueryPathInfo, 7);
if (s) info->ca = parseContentAddressOpt(s);
/* Get the references. */
auto useQueryReferences(state->stmts->QueryReferences.use()(info->id));
while (useQueryReferences.next())
info->references.insert(parseStorePath(useQueryReferences.getStr(0)));
return info;
return queryPathInfoInternal(*state, path);
}));
} catch (...) { callback.rethrow(); }
}
std::shared_ptr<const ValidPathInfo> LocalStore::queryPathInfoInternal(State & state, const StorePath & path)
{
/* Get the path info. */
auto useQueryPathInfo(state.stmts->QueryPathInfo.use()(printStorePath(path)));
if (!useQueryPathInfo.next())
return std::shared_ptr<ValidPathInfo>();
auto id = useQueryPathInfo.getInt(0);
auto narHash = Hash::dummy;
try {
narHash = Hash::parseAnyPrefixed(useQueryPathInfo.getStr(1));
} catch (BadHash & e) {
throw Error("invalid-path entry for '%s': %s", printStorePath(path), e.what());
}
auto info = std::make_shared<ValidPathInfo>(path, narHash);
info->id = id;
info->registrationTime = useQueryPathInfo.getInt(2);
auto s = (const char *) sqlite3_column_text(state.stmts->QueryPathInfo, 3);
if (s) info->deriver = parseStorePath(s);
/* Note that narSize = NULL yields 0. */
info->narSize = useQueryPathInfo.getInt(4);
info->ultimate = useQueryPathInfo.getInt(5) == 1;
s = (const char *) sqlite3_column_text(state.stmts->QueryPathInfo, 6);
if (s) info->sigs = tokenizeString<StringSet>(s, " ");
s = (const char *) sqlite3_column_text(state.stmts->QueryPathInfo, 7);
if (s) info->ca = parseContentAddressOpt(s);
/* Get the references. */
auto useQueryReferences(state.stmts->QueryReferences.use()(info->id));
while (useQueryReferences.next())
info->references.insert(parseStorePath(useQueryReferences.getStr(0)));
return info;
}
/* Update path info in the database. */
void LocalStore::updatePathInfo(State & state, const ValidPathInfo & info)
{
@ -905,7 +914,7 @@ LocalStore::queryDerivationOutputMapNoResolve(const StorePath& path_)
if (realisation)
outputs.insert_or_assign(outputName, realisation->outPath);
else
outputs.insert_or_assign(outputName, std::nullopt);
outputs.insert({outputName, std::nullopt});
}
return outputs;
@ -1606,7 +1615,7 @@ void LocalStore::addSignatures(const StorePath & storePath, const StringSet & si
SQLiteTxn txn(state->db);
auto info = std::const_pointer_cast<ValidPathInfo>(std::shared_ptr<const ValidPathInfo>(queryPathInfo(storePath)));
auto info = std::const_pointer_cast<ValidPathInfo>(queryPathInfoInternal(*state, storePath));
info->sigs.insert(sigs.begin(), sigs.end());

8
src/libstore/local-store.hh
View file

@ -43,7 +43,7 @@ struct LocalStoreConfig : virtual LocalFSStoreConfig
};
class LocalStore : public LocalFSStore, public virtual LocalStoreConfig
class LocalStore : public virtual LocalStoreConfig, public virtual LocalFSStore
{
private:
@ -198,9 +198,7 @@ public:
void vacuumDB();
/* Repair the contents of the given path by redownloading it using
a substituter (if available). */
void repairPath(const StorePath & path);
void repairPath(const StorePath & path) override;
void addSignatures(const StorePath & storePath, const StringSet & sigs) override;
@ -235,6 +233,8 @@ private:
void verifyPath(const Path & path, const StringSet & store,
PathSet & done, StorePathSet & validPaths, RepairFlag repair, bool & errors);
std::shared_ptr<const ValidPathInfo> queryPathInfoInternal(State & state, const StorePath & path);
void updatePathInfo(State & state, const ValidPathInfo & info);
void upgradeStore6();

12
src/libstore/names.cc
View file

@ -80,16 +80,16 @@ string nextComponent(string::const_iterator & p,
static bool componentsLT(const string & c1, const string & c2)
{
int n1, n2;
bool c1Num = string2Int(c1, n1), c2Num = string2Int(c2, n2);
auto n1 = string2Int<int>(c1);
auto n2 = string2Int<int>(c2);
if (c1Num && c2Num) return n1 < n2;
else if (c1 == "" && c2Num) return true;
if (n1 && n2) return *n1 < *n2;
else if (c1 == "" && n2) return true;
else if (c1 == "pre" && c2 != "pre") return true;
else if (c2 == "pre") return false;
/* Assume that `2.3a' < `2.3.1'. */
else if (c2Num) return true;
else if (c1Num) return false;
else if (n2) return true;
else if (n1) return false;
else return c1 < c2;
}

2
src/libstore/nar-accessor.cc
View file

@ -203,7 +203,7 @@ struct NarAccessor : public FSAccessor
return res;
}
std::string readFile(const Path & path) override
std::string readFile(const Path & path, bool requireValidPath = true) override
{
auto i = get(path);
if (i.type != FSAccessor::Type::tRegular)

6
src/libstore/nar-info-disk-cache.cc
View file

@ -109,8 +109,10 @@ public:
SQLiteStmt(state->db,
"delete from NARs where ((present = 0 and timestamp < ?) or (present = 1 and timestamp < ?))")
.use()
(now - settings.ttlNegativeNarInfoCache)
(now - settings.ttlPositiveNarInfoCache)
// Use a minimum TTL to prevent --refresh from
// nuking the entire disk cache.
(now - std::max(settings.ttlNegativeNarInfoCache.get(), 3600U))
(now - std::max(settings.ttlPositiveNarInfoCache.get(), 30 * 24 * 3600U))
.exec();
debug("deleted %d entries from the NAR info disk cache", sqlite3_changes(state->db));

8
src/libstore/nar-info.cc
View file

@ -46,14 +46,18 @@ NarInfo::NarInfo(const Store & store, const std::string & s, const std::string &
else if (name == "FileHash")
fileHash = parseHashField(value);
else if (name == "FileSize") {
if (!string2Int(value, fileSize)) throw corrupt();
auto n = string2Int<decltype(fileSize)>(value);
if (!n) throw corrupt();
fileSize = *n;
}
else if (name == "NarHash") {
narHash = parseHashField(value);
haveNarHash = true;
}
else if (name == "NarSize") {
if (!string2Int(value, narSize)) throw corrupt();
auto n = string2Int<decltype(narSize)>(value);
if (!n) throw corrupt();
narSize = *n;
}
else if (name == "References") {
auto refs = tokenizeString<Strings>(value, " ");

4
src/libstore/parsed-derivations.cc
View file

@ -101,6 +101,10 @@ bool ParsedDerivation::canBuildLocally(Store & localStore) const
&& !drv.isBuiltin())
return false;
if (settings.maxBuildJobs.get() == 0
&& !drv.isBuiltin())
return false;
for (auto & feature : getRequiredSystemFeatures())
if (!localStore.systemFeatures.get().count(feature)) return false;

11
src/libstore/profiles.cc
View file

@ -21,9 +21,8 @@ static std::optional<GenerationNumber> parseName(const string & profileName, con
string s = string(name, profileName.size() + 1);
string::size_type p = s.find("-link");
if (p == string::npos) return {};
unsigned int n;
if (string2Int(string(s, 0, p), n) && n >= 0)
return n;
if (auto n = string2Int<unsigned int>(s.substr(0, p)))
return *n;
else
return {};
}
@ -214,12 +213,12 @@ void deleteGenerationsOlderThan(const Path & profile, const string & timeSpec, b
{
time_t curTime = time(0);
string strDays = string(timeSpec, 0, timeSpec.size() - 1);
int days;
auto days = string2Int<int>(strDays);
if (!string2Int(strDays, days) || days < 1)
if (!days || *days < 1)
throw Error("invalid number of days specifier '%1%'", timeSpec);
time_t oldTime = curTime - days * 24 * 3600;
time_t oldTime = curTime - *days * 24 * 3600;
deleteGenerationsOlderThan(profile, oldTime, dryRun);
}

3
src/libstore/references.cc
View file

@ -88,9 +88,6 @@ PathSet scanForReferences(Sink & toTee,
TeeSink sink { refsSink, toTee };
std::map<string, Path> backMap;
/* For efficiency (and a higher hit rate), just search for the
hash part of the file name. (This assumes that all references
have the form `HASH-bla'). */
for (auto & i : refs) {
auto baseName = std::string(baseNameOf(i));
string::size_type pos = baseName.find('-');

8
src/libstore/remote-fs-accessor.cc
View file

@ -43,13 +43,13 @@ void RemoteFSAccessor::addToCache(std::string_view hashPart, const std::string &
}
}
std::pair<ref<FSAccessor>, Path> RemoteFSAccessor::fetch(const Path & path_)
std::pair<ref<FSAccessor>, Path> RemoteFSAccessor::fetch(const Path & path_, bool requireValidPath)
{
auto path = canonPath(path_);
auto [storePath, restPath] = store->toStorePath(path);
if (!store->isValidPath(storePath))
if (requireValidPath && !store->isValidPath(storePath))
throw InvalidPath("path '%1%' is not a valid store path", store->printStorePath(storePath));
auto i = nars.find(std::string(storePath.hashPart()));
@ -113,9 +113,9 @@ StringSet RemoteFSAccessor::readDirectory(const Path & path)
return res.first->readDirectory(res.second);
}
std::string RemoteFSAccessor::readFile(const Path & path)
std::string RemoteFSAccessor::readFile(const Path & path, bool requireValidPath)
{
auto res = fetch(path);
auto res = fetch(path, requireValidPath);
return res.first->readFile(res.second);
}

4
src/libstore/remote-fs-accessor.hh
View file

@ -14,7 +14,7 @@ class RemoteFSAccessor : public FSAccessor
Path cacheDir;
std::pair<ref<FSAccessor>, Path> fetch(const Path & path_);
std::pair<ref<FSAccessor>, Path> fetch(const Path & path_, bool requireValidPath = true);
friend class BinaryCacheStore;
@ -32,7 +32,7 @@ public:
StringSet readDirectory(const Path & path) override;
std::string readFile(const Path & path) override;
std::string readFile(const Path & path, bool requireValidPath = true) override;
std::string readLink(const Path & path) override;
};

4
src/libstore/remote-store.cc
View file

@ -77,8 +77,8 @@ void write(const Store & store, Sink & out, const std::optional<ContentAddress>
/* TODO: Separate these store impls into different files, give them better names */
RemoteStore::RemoteStore(const Params & params)
: Store(params)
, RemoteStoreConfig(params)
: RemoteStoreConfig(params)
, Store(params)
, connections(make_ref<Pool<Connection>>(
std::max(1, (int) maxConnections),
[this]() {

2
src/libstore/remote-store.hh
View file

@ -29,7 +29,7 @@ struct RemoteStoreConfig : virtual StoreConfig
/* FIXME: RemoteStore is a misnomer - should be something like
DaemonStore. */
class RemoteStore : public virtual Store, public virtual RemoteStoreConfig
class RemoteStore : public virtual RemoteStoreConfig, public virtual Store
{
public:

11
src/libstore/s3-binary-cache-store.cc
View file

@ -177,6 +177,11 @@ S3Helper::FileTransferResult S3Helper::getObject(
return res;
}
S3BinaryCacheStore::S3BinaryCacheStore(const Params & params)
: BinaryCacheStoreConfig(params)
, BinaryCacheStore(params)
{ }
struct S3BinaryCacheStoreConfig : virtual BinaryCacheStoreConfig
{
using BinaryCacheStoreConfig::BinaryCacheStoreConfig;
@ -195,7 +200,7 @@ struct S3BinaryCacheStoreConfig : virtual BinaryCacheStoreConfig
const std::string name() override { return "S3 Binary Cache Store"; }
};
struct S3BinaryCacheStoreImpl : public S3BinaryCacheStore, virtual S3BinaryCacheStoreConfig
struct S3BinaryCacheStoreImpl : virtual S3BinaryCacheStoreConfig, public virtual S3BinaryCacheStore
{
std::string bucketName;
@ -208,6 +213,10 @@ struct S3BinaryCacheStoreImpl : public S3BinaryCacheStore, virtual S3BinaryCache
const std::string & bucketName,
const Params & params)
: StoreConfig(params)
, BinaryCacheStoreConfig(params)
, S3BinaryCacheStoreConfig(params)
, Store(params)
, BinaryCacheStore(params)
, S3BinaryCacheStore(params)
, bucketName(bucketName)
, s3Helper(profile, region, scheme, endpoint)

6
src/libstore/s3-binary-cache-store.hh
View file

@ -6,13 +6,11 @@
namespace nix {
class S3BinaryCacheStore : public BinaryCacheStore
class S3BinaryCacheStore : public virtual BinaryCacheStore
{
protected:
S3BinaryCacheStore(const Params & params)
: BinaryCacheStore(params)
{ }
S3BinaryCacheStore(const Params & params);
public:

4
src/libstore/ssh-store.cc
View file

@ -20,12 +20,14 @@ struct SSHStoreConfig : virtual RemoteStoreConfig
const std::string name() override { return "SSH Store"; }
};
class SSHStore : public virtual RemoteStore, public virtual SSHStoreConfig
class SSHStore : public virtual SSHStoreConfig, public virtual RemoteStore
{
public:
SSHStore(const std::string & scheme, const std::string & host, const Params & params)
: StoreConfig(params)
, RemoteStoreConfig(params)
, SSHStoreConfig(params)
, Store(params)
, RemoteStore(params)
, host(host)

34
src/libstore/store-api.cc
View file

@ -949,19 +949,20 @@ std::optional<ValidPathInfo> decodeValidPathInfo(const Store & store, std::istre
getline(str, s);
auto narHash = Hash::parseAny(s, htSHA256);
getline(str, s);
uint64_t narSize;
if (!string2Int(s, narSize)) throw Error("number expected");
hashGiven = { narHash, narSize };
auto narSize = string2Int<uint64_t>(s);
if (!narSize) throw Error("number expected");
hashGiven = { narHash, *narSize };
}
ValidPathInfo info(store.parseStorePath(path), hashGiven->first);
info.narSize = hashGiven->second;
std::string deriver;
getline(str, deriver);
if (deriver != "") info.deriver = store.parseStorePath(deriver);
string s; int n;
string s;
getline(str, s);
if (!string2Int(s, n)) throw Error("number expected");
while (n--) {
auto n = string2Int<int>(s);
if (!n) throw Error("number expected");
while ((*n)--) {
getline(str, s);
info.references.insert(store.parseStorePath(s));
}
@ -1066,26 +1067,23 @@ Derivation Store::derivationFromPath(const StorePath & drvPath)
return readDerivation(drvPath);
}
Derivation Store::readDerivation(const StorePath & drvPath)
Derivation readDerivationCommon(Store& store, const StorePath& drvPath, bool requireValidPath)
{
auto accessor = getFSAccessor();
auto accessor = store.getFSAccessor();
try {
return parseDerivation(*this,
accessor->readFile(printStorePath(drvPath)),
return parseDerivation(store,
accessor->readFile(store.printStorePath(drvPath), requireValidPath),
Derivation::nameFromPath(drvPath));
} catch (FormatError & e) {
throw Error("error parsing derivation '%s': %s", printStorePath(drvPath), e.msg());
throw Error("error parsing derivation '%s': %s", store.printStorePath(drvPath), e.msg());
}
}
Derivation Store::readDerivation(const StorePath & drvPath)
{ return readDerivationCommon(*this, drvPath, true); }
Derivation Store::readInvalidDerivation(const StorePath & drvPath)
{
return parseDerivation(
*this,
readFile(Store::toRealPath(drvPath)),
Derivation::nameFromPath(drvPath));
}
{ return readDerivationCommon(*this, drvPath, false); }
}

25
src/libstore/store-api.hh
View file

@ -175,25 +175,7 @@ struct StoreConfig : public Config
{
using Config::Config;
/**
* When constructing a store implementation, we pass in a map `params` of
* parameters that's supposed to initialize the associated config.
* To do that, we must use the `StoreConfig(StringMap & params)`
* constructor, so we'd like to `delete` its default constructor to enforce
* it.
*
* However, actually deleting it means that all the subclasses of
* `StoreConfig` will have their default constructor deleted (because it's
* supposed to call the deleted default constructor of `StoreConfig`). But
* because we're always using virtual inheritance, the constructors of
* child classes will never implicitely call this one, so deleting it will
* be more painful than anything else.
*
* So we `assert(false)` here to ensure at runtime that the right
* constructor is always called without having to redefine a custom
* constructor for each `*Config` class.
*/
StoreConfig() { assert(false); }
StoreConfig() = delete;
virtual ~StoreConfig() { }
@ -624,6 +606,11 @@ public:
virtual ref<FSAccessor> getFSAccessor()
{ unsupported("getFSAccessor"); }
/* Repair the contents of the given path by redownloading it using
a substituter (if available). */
virtual void repairPath(const StorePath & path)
{ unsupported("repairPath"); }
/* Add signatures to the specified store path. The signatures are
not verified. */
virtual void addSignatures(const StorePath & storePath, const StringSet & sigs)

3
src/libstore/uds-remote-store.cc
View file

@ -15,6 +15,9 @@ namespace nix {
UDSRemoteStore::UDSRemoteStore(const Params & params)
: StoreConfig(params)
, LocalFSStoreConfig(params)
, RemoteStoreConfig(params)
, UDSRemoteStoreConfig(params)
, Store(params)
, LocalFSStore(params)
, RemoteStore(params)

7
src/libstore/uds-remote-store.hh
View file

@ -14,15 +14,10 @@ struct UDSRemoteStoreConfig : virtual LocalFSStoreConfig, virtual RemoteStoreCon
{
}
UDSRemoteStoreConfig()
: UDSRemoteStoreConfig(Store::Params({}))
{
}
const std::string name() override { return "Local Daemon Store"; }
};
class UDSRemoteStore : public LocalFSStore, public RemoteStore, public virtual UDSRemoteStoreConfig
class UDSRemoteStore : public virtual UDSRemoteStoreConfig, public virtual LocalFSStore, public virtual RemoteStore
{
public:

34
src/libutil/args.cc
View file

@ -254,6 +254,8 @@ nlohmann::json Args::toJSON()
res["description"] = description();
res["flags"] = std::move(flags);
res["args"] = std::move(args);
auto s = doc();
if (s != "") res.emplace("doc", stripIndentation(s));
return res;
}
@ -351,38 +353,6 @@ void printTable(std::ostream & out, const Table2 & table)
}
}
void Command::printHelp(const string & programName, std::ostream & out)
{
Args::printHelp(programName, out);
auto exs = examples();
if (!exs.empty()) {
out << "\n" ANSI_BOLD "Examples:" ANSI_NORMAL "\n";
for (auto & ex : exs)
out << "\n"
<< " " << ex.description << "\n" // FIXME: wrap
<< " $ " << ex.command << "\n";
}
}
nlohmann::json Command::toJSON()
{
auto exs = nlohmann::json::array();
for (auto & example : examples()) {
auto ex = nlohmann::json::object();
ex["description"] = example.description;
ex["command"] = chomp(stripIndentation(example.command));
exs.push_back(std::move(ex));
}
auto res = Args::toJSON();
res["examples"] = std::move(exs);
auto s = doc();
if (s != "") res.emplace("doc", stripIndentation(s));
return res;
}
MultiCommand::MultiCommand(const Commands & commands)
: commands(commands)
{

76
src/libutil/args.hh
View file

@ -25,6 +25,9 @@ public:
/* Return a short one-line description of the command. */
virtual std::string description() { return ""; }
/* Return documentation about this command, in Markdown format. */
virtual std::string doc() { return ""; }
protected:
static const size_t ArityAny = std::numeric_limits<size_t>::max();
@ -65,8 +68,12 @@ protected:
, arity(ArityAny)
{ }
template<class T>
Handler(T * dest)
Handler(std::string * dest)
: fun([=](std::vector<std::string> ss) { *dest = ss[0]; })
, arity(1)
{ }
Handler(std::optional<std::string> * dest)
: fun([=](std::vector<std::string> ss) { *dest = ss[0]; })
, arity(1)
{ }
@ -76,6 +83,14 @@ protected:
: fun([=](std::vector<std::string> ss) { *dest = val; })
, arity(0)
{ }
template<class I>
Handler(I * dest)
: fun([=](std::vector<std::string> ss) {
*dest = string2IntWithUnitPrefix<I>(ss[0]);
})
, arity(1)
{ }
};
/* Flags. */
@ -127,19 +142,6 @@ public:
/* Helper functions for constructing flags / positional
arguments. */
void mkFlag1(char shortName, const std::string & longName,
const std::string & label, const std::string & description,
std::function<void(std::string)> fun)
{
addFlag({
.longName = longName,
.shortName = shortName,
.description = description,
.labels = {label},
.handler = {[=](std::string s) { fun(s); }}
});
}
void mkFlag(char shortName, const std::string & name,
const std::string & description, bool * dest)
{
@ -158,33 +160,6 @@ public:
});
}
template<class I>
void mkIntFlag(char shortName, const std::string & longName,
const std::string & description, I * dest)
{
mkFlag<I>(shortName, longName, description, [=](I n) {
*dest = n;
});
}
template<class I>
void mkFlag(char shortName, const std::string & longName,
const std::string & description, std::function<void(I)> fun)
{
addFlag({
.longName = longName,
.shortName = shortName,
.description = description,
.labels = {"N"},
.handler = {[=](std::string s) {
I n;
if (!string2Int(s, n))
throw UsageError("flag '--%s' requires a integer argument", longName);
fun(n);
}}
});
}
void expectArgs(ExpectedArg && arg)
{
expectedArgs.emplace_back(std::move(arg));
@ -225,28 +200,11 @@ struct Command : virtual Args
virtual void prepare() { };
virtual void run() = 0;
/* Return documentation about this command, in Markdown format. */
virtual std::string doc() { return ""; }
struct Example
{
std::string description;
std::string command;
};
typedef std::list<Example> Examples;
virtual Examples examples() { return Examples(); }
typedef int Category;
static constexpr Category catDefault = 0;
virtual Category category() { return catDefault; }
void printHelp(const string & programName, std::ostream & out) override;
nlohmann::json toJSON() override;
};
typedef std::map<std::string, std::function<ref<Command>()>> Commands;

4
src/libutil/config.cc
View file

@ -230,7 +230,9 @@ template<typename T>
void BaseSetting<T>::set(const std::string & str, bool append)
{
static_assert(std::is_integral<T>::value, "Integer required.");
if (!string2Int(str, value))
if (auto n = string2Int<T>(str))
value = *n;
else
throw UsageError("setting '%s' has invalid value '%s'", name, str);
}

52
src/libutil/error.cc
View file

@ -61,36 +61,31 @@ std::optional<LinesOfCode> getCodeLines(const ErrPos & errPos)
if (errPos.origin == foFile) {
LinesOfCode loc;
try {
// FIXME: when running as the daemon, make sure we don't
// open a file to which the client doesn't have access.
AutoCloseFD fd = open(errPos.file.c_str(), O_RDONLY | O_CLOEXEC);
if (!fd) {
logError(SysError("opening file '%1%'", errPos.file).info());
return std::nullopt;
}
else
if (!fd) return {};
// count the newlines.
int count = 0;
string line;
int pl = errPos.line - 1;
do
{
// count the newlines.
int count = 0;
string line;
int pl = errPos.line - 1;
do
{
line = readLine(fd.get());
++count;
if (count < pl)
{
;
}
else if (count == pl) {
loc.prevLineOfCode = line;
} else if (count == pl + 1) {
loc.errLineOfCode = line;
} else if (count == pl + 2) {
loc.nextLineOfCode = line;
break;
}
} while (true);
return loc;
}
line = readLine(fd.get());
++count;
if (count < pl)
;
else if (count == pl)
loc.prevLineOfCode = line;
else if (count == pl + 1)
loc.errLineOfCode = line;
else if (count == pl + 2) {
loc.nextLineOfCode = line;
break;
}
} while (true);
return loc;
}
catch (EndOfFile & eof) {
if (loc.errLineOfCode.has_value())
@ -99,7 +94,6 @@ std::optional<LinesOfCode> getCodeLines(const ErrPos & errPos)
return std::nullopt;
}
catch (std::exception & e) {
printError("error reading nix file: %s\n%s", errPos.file, e.what());
return std::nullopt;
}
} else {

2
src/libutil/error.hh
View file

@ -38,7 +38,7 @@ namespace nix {
ErrorInfo structs are sent to the logger as part of an exception, or directly with the
logError or logWarning macros.
See the error-demo.cc program for usage examples.
See libutil/tests/logging.cc for usage examples.
*/

6
src/libutil/tests/logging.cc
View file

@ -49,7 +49,7 @@ namespace nix {
});
auto str = testing::internal::GetCapturedStderr();
ASSERT_STREQ(str.c_str(), "\x1B[31;1merror:\x1B[0m\x1B[34;1m --- SysError --- error-unit-test\x1B[0m\nopening file '\x1B[33;1mrandom.nix\x1B[0m': \x1B[33;1mNo such file or directory\x1B[0m\n@nix {\"action\":\"msg\",\"column\":13,\"file\":\"random.nix\",\"level\":0,\"line\":2,\"msg\":\"\\u001b[31;1merror:\\u001b[0m\\u001b[34;1m --- error name --- error-unit-test\\u001b[0m\\n\\u001b[34;1mat: \\u001b[33;1m(2:13)\\u001b[34;1m in file: \\u001b[0mrandom.nix\\n\\nerror without any code lines.\\n\\nthis hint has \\u001b[33;1myellow\\u001b[0m templated \\u001b[33;1mvalues\\u001b[0m!!\",\"raw_msg\":\"this hint has \\u001b[33;1myellow\\u001b[0m templated \\u001b[33;1mvalues\\u001b[0m!!\"}\n");
ASSERT_STREQ(str.c_str(), "@nix {\"action\":\"msg\",\"column\":13,\"file\":\"random.nix\",\"level\":0,\"line\":2,\"msg\":\"\\u001b[31;1merror:\\u001b[0m\\u001b[34;1m --- error name --- error-unit-test\\u001b[0m\\n\\u001b[34;1mat: \\u001b[33;1m(2:13)\\u001b[34;1m in file: \\u001b[0mrandom.nix\\n\\nerror without any code lines.\\n\\nthis hint has \\u001b[33;1myellow\\u001b[0m templated \\u001b[33;1mvalues\\u001b[0m!!\",\"raw_msg\":\"this hint has \\u001b[33;1myellow\\u001b[0m templated \\u001b[33;1mvalues\\u001b[0m!!\"}\n");
}
TEST(logEI, appendingHintsToPreviousError) {
@ -208,7 +208,7 @@ namespace nix {
});
auto str = testing::internal::GetCapturedStderr();
ASSERT_STREQ(str.c_str(), "\x1B[31;1merror:\x1B[0m\x1B[34;1m --- SysError --- error-unit-test\x1B[0m\nopening file '\x1B[33;1minvalid filename\x1B[0m': \x1B[33;1mNo such file or directory\x1B[0m\n\x1B[31;1merror:\x1B[0m\x1B[34;1m --- error name --- error-unit-test\x1B[0m\n\x1B[34;1mat: \x1B[33;1m(2:13)\x1B[34;1m in file: \x1B[0minvalid filename\n\nerror without any code lines.\n\nthis hint has \x1B[33;1myellow\x1B[0m templated \x1B[33;1mvalues\x1B[0m!!\n");
ASSERT_STREQ(str.c_str(), "\x1B[31;1merror:\x1B[0m\x1B[34;1m --- error name --- error-unit-test\x1B[0m\n\x1B[34;1mat: \x1B[33;1m(2:13)\x1B[34;1m in file: \x1B[0minvalid filename\n\nerror without any code lines.\n\nthis hint has \x1B[33;1myellow\x1B[0m templated \x1B[33;1mvalues\x1B[0m!!\n");
}
TEST(logError, logErrorWithOnlyHintAndName) {
@ -290,7 +290,7 @@ namespace nix {
logError(e.info());
auto str = testing::internal::GetCapturedStderr();
ASSERT_STREQ(str.c_str(), "\x1B[31;1merror:\x1B[0m\x1B[34;1m --- SysError --- error-unit-test\x1B[0m\nopening file '\x1B[33;1minvalid filename\x1B[0m': \x1B[33;1mNo such file or directory\x1B[0m\n\x1B[31;1merror:\x1B[0m\x1B[34;1m --- AssertionError --- error-unit-test\x1B[0m\n\x1B[34;1mat: \x1B[33;1m(2:13)\x1B[34;1m from string\x1B[0m\n\nshow-traces\n\n 1| previous line of code\n 2| this is the problem line of code\n | \x1B[31;1m^\x1B[0m\n 3| next line of code\n\nit has been \x1B[33;1mzero\x1B[0m days since our last error\n\x1B[34;1m---- show-trace ----\x1B[0m\n\x1B[34;1mtrace: \x1B[0mwhile trying to compute \x1B[33;1m42\x1B[0m\n\x1B[34;1mat: \x1B[33;1m(1:19)\x1B[34;1m from stdin\x1B[0m\n\n 1| this is the other problem line of code\n | \x1B[31;1m^\x1B[0m\n\n\x1B[34;1mtrace: \x1B[0mwhile doing something without a \x1B[33;1mpos\x1B[0m\n\x1B[34;1mtrace: \x1B[0mmissing \x1B[33;1mnix file\x1B[0m\n\x1B[34;1mat: \x1B[33;1m(100:1)\x1B[34;1m in file: \x1B[0minvalid filename\n");
ASSERT_STREQ(str.c_str(), "\x1B[31;1merror:\x1B[0m\x1B[34;1m --- AssertionError --- error-unit-test\x1B[0m\n\x1B[34;1mat: \x1B[33;1m(2:13)\x1B[34;1m from string\x1B[0m\n\nshow-traces\n\n 1| previous line of code\n 2| this is the problem line of code\n | \x1B[31;1m^\x1B[0m\n 3| next line of code\n\nit has been \x1B[33;1mzero\x1B[0m days since our last error\n\x1B[34;1m---- show-trace ----\x1B[0m\n\x1B[34;1mtrace: \x1B[0mwhile trying to compute \x1B[33;1m42\x1B[0m\n\x1B[34;1mat: \x1B[33;1m(1:19)\x1B[34;1m from stdin\x1B[0m\n\n 1| this is the other problem line of code\n | \x1B[31;1m^\x1B[0m\n\n\x1B[34;1mtrace: \x1B[0mwhile doing something without a \x1B[33;1mpos\x1B[0m\n\x1B[34;1mtrace: \x1B[0mmissing \x1B[33;1mnix file\x1B[0m\n\x1B[34;1mat: \x1B[33;1m(100:1)\x1B[34;1m in file: \x1B[0minvalid filename\n");
}
TEST(addTrace, hideTracesWithoutShowTrace) {

26
src/libutil/tests/tests.cc
View file

@ -320,20 +320,15 @@ namespace nix {
* --------------------------------------------------------------------------*/
TEST(string2Float, emptyString) {
double n;
ASSERT_EQ(string2Float("", n), false);
ASSERT_EQ(string2Float<double>(""), std::nullopt);
}
TEST(string2Float, trivialConversions) {
double n;
ASSERT_EQ(string2Float("1.0", n), true);
ASSERT_EQ(n, 1.0);
ASSERT_EQ(string2Float<double>("1.0"), 1.0);
ASSERT_EQ(string2Float("0.0", n), true);
ASSERT_EQ(n, 0.0);
ASSERT_EQ(string2Float<double>("0.0"), 0.0);
ASSERT_EQ(string2Float("-100.25", n), true);
ASSERT_EQ(n, (-100.25));
ASSERT_EQ(string2Float<double>("-100.25"), -100.25);
}
/* ----------------------------------------------------------------------------
@ -341,20 +336,15 @@ namespace nix {
* --------------------------------------------------------------------------*/
TEST(string2Int, emptyString) {
double n;
ASSERT_EQ(string2Int("", n), false);
ASSERT_EQ(string2Int<int>(""), std::nullopt);
}
TEST(string2Int, trivialConversions) {
double n;
ASSERT_EQ(string2Int("1", n), true);
ASSERT_EQ(n, 1);
ASSERT_EQ(string2Int<int>("1"), 1);
ASSERT_EQ(string2Int("0", n), true);
ASSERT_EQ(n, 0);
ASSERT_EQ(string2Int<int>("0"), 0);
ASSERT_EQ(string2Int("-100", n), true);
ASSERT_EQ(n, (-100));
ASSERT_EQ(string2Int<int>("-100"), -100);
}
/* ----------------------------------------------------------------------------

2
src/libutil/url-parts.hh
View file

@ -23,7 +23,7 @@ const static std::string absPathRegex = "(?:(?:/" + segmentRegex + ")*/?)";
const static std::string pathRegex = "(?:" + segmentRegex + "(?:/" + segmentRegex + ")*/?)";
// A Git ref (i.e. branch or tag name).
const static std::string refRegexS = "[a-zA-Z0-9][a-zA-Z0-9_.-]*"; // FIXME: check
const static std::string refRegexS = "[a-zA-Z0-9][a-zA-Z0-9_.\\/-]*"; // FIXME: check
extern std::regex refRegex;
// Instead of defining what a good Git Ref is, we define what a bad Git Ref is

40
src/libutil/util.hh
View file

@ -397,21 +397,49 @@ bool statusOk(int status);
/* Parse a string into an integer. */
template<class N> bool string2Int(const string & s, N & n)
template<class N>
std::optional<N> string2Int(const std::string & s)
{
if (string(s, 0, 1) == "-" && !std::numeric_limits<N>::is_signed)
return false;
if (s.substr(0, 1) == "-" && !std::numeric_limits<N>::is_signed)
return std::nullopt;
std::istringstream str(s);
N n;
str >> n;
return str && str.get() == EOF;
if (str && str.get() == EOF) return n;
return std::nullopt;
}
/* Like string2Int(), but support an optional suffix 'K', 'M', 'G' or
'T' denoting a binary unit prefix. */
template<class N>
N string2IntWithUnitPrefix(std::string s)
{
N multiplier = 1;
if (!s.empty()) {
char u = std::toupper(*s.rbegin());
if (std::isalpha(u)) {
if (u == 'K') multiplier = 1ULL << 10;
else if (u == 'M') multiplier = 1ULL << 20;
else if (u == 'G') multiplier = 1ULL << 30;
else if (u == 'T') multiplier = 1ULL << 40;
else throw UsageError("invalid unit specifier '%1%'", u);
s.resize(s.size() - 1);
}
}
if (auto n = string2Int<N>(s))
return *n * multiplier;
throw UsageError("'%s' is not an integer", s);
}
/* Parse a string into a float. */
template<class N> bool string2Float(const string & s, N & n)
template<class N>
std::optional<N> string2Float(const string & s)
{
std::istringstream str(s);
N n;
str >> n;
return str && str.get() == EOF;
if (str && str.get() == EOF) return n;
return std::nullopt;
}

4
src/nix-build/nix-build.cc
View file

@ -217,9 +217,9 @@ static void main_nix_build(int argc, char * * argv)
// read the shebang to understand which packages to read from. Since
// this is handled via nix-shell -p, we wrap our ruby script execution
// in ruby -e 'load' which ignores the shebangs.
envCommand = (format("exec %1% %2% -e 'load(\"%3%\")' -- %4%") % execArgs % interpreter % script % joined.str()).str();
envCommand = (format("exec %1% %2% -e 'load(ARGV.shift)' -- %3% %4%") % execArgs % interpreter % shellEscape(script) % joined.str()).str();
} else {
envCommand = (format("exec %1% %2% %3% %4%") % execArgs % interpreter % script % joined.str()).str();
envCommand = (format("exec %1% %2% %3% %4%") % execArgs % interpreter % shellEscape(script) % joined.str()).str();
}
}

35
src/nix-env/nix-env.cc
View file

@ -1138,38 +1138,38 @@ static void opQuery(Globals & globals, Strings opFlags, Strings opArgs)
i.queryName(), j)
});
else {
if (v->type == tString) {
if (v->type() == nString) {
attrs2["type"] = "string";
attrs2["value"] = v->string.s;
xml.writeEmptyElement("meta", attrs2);
} else if (v->type == tInt) {
} else if (v->type() == nInt) {
attrs2["type"] = "int";
attrs2["value"] = (format("%1%") % v->integer).str();
xml.writeEmptyElement("meta", attrs2);
} else if (v->type == tFloat) {
} else if (v->type() == nFloat) {
attrs2["type"] = "float";
attrs2["value"] = (format("%1%") % v->fpoint).str();
xml.writeEmptyElement("meta", attrs2);
} else if (v->type == tBool) {
} else if (v->type() == nBool) {
attrs2["type"] = "bool";
attrs2["value"] = v->boolean ? "true" : "false";
xml.writeEmptyElement("meta", attrs2);
} else if (v->isList()) {
} else if (v->type() == nList) {
attrs2["type"] = "strings";
XMLOpenElement m(xml, "meta", attrs2);
for (unsigned int j = 0; j < v->listSize(); ++j) {
if (v->listElems()[j]->type != tString) continue;
if (v->listElems()[j]->type() != nString) continue;
XMLAttrs attrs3;
attrs3["value"] = v->listElems()[j]->string.s;
xml.writeEmptyElement("string", attrs3);
}
} else if (v->type == tAttrs) {
} else if (v->type() == nAttrs) {
attrs2["type"] = "strings";
XMLOpenElement m(xml, "meta", attrs2);
Bindings & attrs = *v->attrs;
for (auto &i : attrs) {
Attr & a(*attrs.find(i.name));
if(a.value->type != tString) continue;
if(a.value->type() != nString) continue;
XMLAttrs attrs3;
attrs3["type"] = i.name;
attrs3["value"] = a.value->string.s;
@ -1250,11 +1250,10 @@ static void opSwitchGeneration(Globals & globals, Strings opFlags, Strings opArg
if (opArgs.size() != 1)
throw UsageError("exactly one argument expected");
GenerationNumber dstGen;
if (!string2Int(opArgs.front(), dstGen))
if (auto dstGen = string2Int<GenerationNumber>(opArgs.front()))
switchGeneration(globals, *dstGen);
else
throw UsageError("expected a generation number");
switchGeneration(globals, dstGen);
}
@ -1308,17 +1307,17 @@ static void opDeleteGenerations(Globals & globals, Strings opFlags, Strings opAr
if(opArgs.front().size() < 2)
throw Error("invalid number of generations ‘%1%’", opArgs.front());
string str_max = string(opArgs.front(), 1, opArgs.front().size());
GenerationNumber max;
if (!string2Int(str_max, max) || max == 0)
auto max = string2Int<GenerationNumber>(str_max);
if (!max || *max == 0)
throw Error("invalid number of generations to keep ‘%1%’", opArgs.front());
deleteGenerationsGreaterThan(globals.profile, max, globals.dryRun);
deleteGenerationsGreaterThan(globals.profile, *max, globals.dryRun);
} else {
std::set<GenerationNumber> gens;
for (auto & i : opArgs) {
GenerationNumber n;
if (!string2Int(i, n))
if (auto n = string2Int<GenerationNumber>(i))
gens.insert(*n);
else
throw UsageError("invalid generation number '%1%'", i);
gens.insert(n);
}
deleteGenerations(globals.profile, gens, globals.dryRun);
}

8
src/nix-env/user-env.cc
View file

@ -53,10 +53,12 @@ bool createUserEnv(EvalState & state, DrvInfos & elems,
output paths, and optionally the derivation path, as well
as the meta attributes. */
Path drvPath = keepDerivations ? i.queryDrvPath() : "";
DrvInfo::Outputs outputs = i.queryOutputs(true);
StringSet metaNames = i.queryMetaNames();
Value & v(*state.allocValue());
manifest.listElems()[n++] = &v;
state.mkAttrs(v, 16);
state.mkAttrs(v, 7 + outputs.size());
mkString(*state.allocAttr(v, state.sType), "derivation");
mkString(*state.allocAttr(v, state.sName), i.queryName());
@ -68,7 +70,6 @@ bool createUserEnv(EvalState & state, DrvInfos & elems,
mkString(*state.allocAttr(v, state.sDrvPath), i.queryDrvPath());
// Copy each output meant for installation.
DrvInfo::Outputs outputs = i.queryOutputs(true);
Value & vOutputs = *state.allocAttr(v, state.sOutputs);
state.mkList(vOutputs, outputs.size());
unsigned int m = 0;
@ -88,8 +89,7 @@ bool createUserEnv(EvalState & state, DrvInfos & elems,
// Copy the meta attributes.
Value & vMeta = *state.allocAttr(v, state.sMeta);
state.mkAttrs(vMeta, 16);
StringSet metaNames = i.queryMetaNames();
state.mkAttrs(vMeta, metaNames.size());
for (auto & j : metaNames) {
Value * v = i.queryMeta(j);
if (!v) continue;

232
src/nix-prefetch-url/nix-prefetch-url.cc
View file

@ -1,232 +0,0 @@
#include "hash.hh"
#include "shared.hh"
#include "filetransfer.hh"
#include "store-api.hh"
#include "eval.hh"
#include "eval-inline.hh"
#include "common-eval-args.hh"
#include "attr-path.hh"
#include "finally.hh"
#include "../nix/legacy.hh"
#include "progress-bar.hh"
#include "tarfile.hh"
#include <iostream>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
using namespace nix;
/* If ‘uri’ starts with ‘mirror://’, then resolve it using the list of
mirrors defined in Nixpkgs. */
string resolveMirrorUri(EvalState & state, string uri)
{
if (string(uri, 0, 9) != "mirror://") return uri;
string s(uri, 9);
auto p = s.find('/');
if (p == string::npos) throw Error("invalid mirror URI");
string mirrorName(s, 0, p);
Value vMirrors;
state.eval(state.parseExprFromString("import <nixpkgs/pkgs/build-support/fetchurl/mirrors.nix>", "."), vMirrors);
state.forceAttrs(vMirrors);
auto mirrorList = vMirrors.attrs->find(state.symbols.create(mirrorName));
if (mirrorList == vMirrors.attrs->end())
throw Error("unknown mirror name '%1%'", mirrorName);
state.forceList(*mirrorList->value);
if (mirrorList->value->listSize() < 1)
throw Error("mirror URI '%1%' did not expand to anything", uri);
string mirror = state.forceString(*mirrorList->value->listElems()[0]);
return mirror + (hasSuffix(mirror, "/") ? "" : "/") + string(s, p + 1);
}
static int main_nix_prefetch_url(int argc, char * * argv)
{
{
HashType ht = htSHA256;
std::vector<string> args;
bool printPath = getEnv("PRINT_PATH") == "1";
bool fromExpr = false;
string attrPath;
bool unpack = false;
bool executable = false;
string name;
struct MyArgs : LegacyArgs, MixEvalArgs
{
using LegacyArgs::LegacyArgs;
};
MyArgs myArgs(std::string(baseNameOf(argv[0])), [&](Strings::iterator & arg, const Strings::iterator & end) {
if (*arg == "--help")
showManPage("nix-prefetch-url");
else if (*arg == "--version")
printVersion("nix-prefetch-url");
else if (*arg == "--type") {
string s = getArg(*arg, arg, end);
ht = parseHashType(s);
}
else if (*arg == "--print-path")
printPath = true;
else if (*arg == "--attr" || *arg == "-A") {
fromExpr = true;
attrPath = getArg(*arg, arg, end);
}
else if (*arg == "--unpack")
unpack = true;
else if (*arg == "--executable")
executable = true;
else if (*arg == "--name")
name = getArg(*arg, arg, end);
else if (*arg != "" && arg->at(0) == '-')
return false;
else
args.push_back(*arg);
return true;
});
myArgs.parseCmdline(argvToStrings(argc, argv));
initPlugins();
if (args.size() > 2)
throw UsageError("too many arguments");
Finally f([]() { stopProgressBar(); });
if (isatty(STDERR_FILENO))
startProgressBar();
auto store = openStore();
auto state = std::make_unique<EvalState>(myArgs.searchPath, store);
Bindings & autoArgs = *myArgs.getAutoArgs(*state);
/* If -A is given, get the URI from the specified Nix
expression. */
string uri;
if (!fromExpr) {
if (args.empty())
throw UsageError("you must specify a URI");
uri = args[0];
} else {
Path path = resolveExprPath(lookupFileArg(*state, args.empty() ? "." : args[0]));
Value vRoot;
state->evalFile(path, vRoot);
Value & v(*findAlongAttrPath(*state, attrPath, autoArgs, vRoot).first);
state->forceAttrs(v);
/* Extract the URI. */
auto attr = v.attrs->find(state->symbols.create("urls"));
if (attr == v.attrs->end())
throw Error("attribute set does not contain a 'urls' attribute");
state->forceList(*attr->value);
if (attr->value->listSize() < 1)
throw Error("'urls' list is empty");
uri = state->forceString(*attr->value->listElems()[0]);
/* Extract the hash mode. */
attr = v.attrs->find(state->symbols.create("outputHashMode"));
if (attr == v.attrs->end())
printInfo("warning: this does not look like a fetchurl call");
else
unpack = state->forceString(*attr->value) == "recursive";
/* Extract the name. */
if (name.empty()) {
attr = v.attrs->find(state->symbols.create("name"));
if (attr != v.attrs->end())
name = state->forceString(*attr->value);
}
}
/* Figure out a name in the Nix store. */
if (name.empty())
name = baseNameOf(uri);
if (name.empty())
throw Error("cannot figure out file name for '%1%'", uri);
/* If an expected hash is given, the file may already exist in
the store. */
std::optional<Hash> expectedHash;
Hash hash(ht);
std::optional<StorePath> storePath;
if (args.size() == 2) {
expectedHash = Hash::parseAny(args[1], ht);
const auto recursive = unpack ? FileIngestionMethod::Recursive : FileIngestionMethod::Flat;
storePath = store->makeFixedOutputPath(recursive, *expectedHash, name);
if (store->isValidPath(*storePath))
hash = *expectedHash;
else
storePath.reset();
}
if (!storePath) {
auto actualUri = resolveMirrorUri(*state, uri);
AutoDelete tmpDir(createTempDir(), true);
Path tmpFile = (Path) tmpDir + "/tmp";
/* Download the file. */
{
auto mode = 0600;
if (executable)
mode = 0700;
AutoCloseFD fd = open(tmpFile.c_str(), O_WRONLY | O_CREAT | O_EXCL, mode);
if (!fd) throw SysError("creating temporary file '%s'", tmpFile);
FdSink sink(fd.get());
FileTransferRequest req(actualUri);
req.decompress = false;
getFileTransfer()->download(std::move(req), sink);
}
/* Optionally unpack the file. */
if (unpack) {
printInfo("unpacking...");
Path unpacked = (Path) tmpDir + "/unpacked";
createDirs(unpacked);
unpackTarfile(tmpFile, unpacked);
/* If the archive unpacks to a single file/directory, then use
that as the top-level. */
auto entries = readDirectory(unpacked);
if (entries.size() == 1)
tmpFile = unpacked + "/" + entries[0].name;
else
tmpFile = unpacked;
}
const auto method = unpack || executable ? FileIngestionMethod::Recursive : FileIngestionMethod::Flat;
auto info = store->addToStoreSlow(name, tmpFile, method, ht, expectedHash);
storePath = info.path;
assert(info.ca);
hash = getContentAddressHash(*info.ca);
}
stopProgressBar();
if (!printPath)
printInfo("path is '%s'", store->printStorePath(*storePath));
std::cout << printHash16or32(hash) << std::endl;
if (printPath)
std::cout << store->printStorePath(*storePath) << std::endl;
return 0;
}
}
static RegisterLegacyCommand r_nix_prefetch_url("nix-prefetch-url", main_nix_prefetch_url);

22
src/nix-store/nix-store.cc
View file

@ -19,10 +19,6 @@
#include <sys/stat.h>
#include <fcntl.h>
#if HAVE_SODIUM
#include <sodium.h>
#endif
namespace nix_store {
@ -761,7 +757,7 @@ static void opRepairPath(Strings opFlags, Strings opArgs)
throw UsageError("no flags expected");
for (auto & i : opArgs)
ensureLocalStore()->repairPath(store->followLinksToStorePath(i));
store->repairPath(store->followLinksToStorePath(i));
}
/* Optimise the disk space usage of the Nix store by hard-linking
@ -980,21 +976,11 @@ static void opGenerateBinaryCacheKey(Strings opFlags, Strings opArgs)
string secretKeyFile = *i++;
string publicKeyFile = *i++;
#if HAVE_SODIUM
if (sodium_init() == -1)
throw Error("could not initialise libsodium");
auto secretKey = SecretKey::generate(keyName);
unsigned char pk[crypto_sign_PUBLICKEYBYTES];
unsigned char sk[crypto_sign_SECRETKEYBYTES];
if (crypto_sign_keypair(pk, sk) != 0)
throw Error("key generation failed");
writeFile(publicKeyFile, keyName + ":" + base64Encode(string((char *) pk, crypto_sign_PUBLICKEYBYTES)));
writeFile(publicKeyFile, secretKey.toPublicKey().to_string());
umask(0077);
writeFile(secretKeyFile, keyName + ":" + base64Encode(string((char *) sk, crypto_sign_SECRETKEYBYTES)));
#else
throw Error("Nix was not compiled with libsodium, required for signed binary cache support");
#endif
writeFile(secretKeyFile, secretKey.to_string());
}

2
src/nix/add-to-store.cc
View file

@ -19,7 +19,7 @@ struct CmdAddToStore : MixDryRun, StoreCommand
addFlag({
.longName = "name",
.shortName = 'n',
.description = "name component of the store path",
.description = "Override the name component of the store path. It defaults to the base name of *path*.",
.labels = {"name"},
.handler = {&namePart},
});

31
src/nix/build.cc
View file

@ -19,7 +19,7 @@ struct CmdBuild : InstallablesCommand, MixDryRun, MixJSON, MixProfile
addFlag({
.longName = "out-link",
.shortName = 'o',
.description = "path of the symlink to the build result",
.description = "Use *path* as prefix for the symlinks to the build results. It defaults to `result`.",
.labels = {"path"},
.handler = {&outLink},
.completer = completePath
@ -27,13 +27,13 @@ struct CmdBuild : InstallablesCommand, MixDryRun, MixJSON, MixProfile
addFlag({
.longName = "no-link",
.description = "do not create a symlink to the build result",
.description = "Do not create symlinks to the build results.",
.handler = {&outLink, Path("")},
});
addFlag({
.longName = "rebuild",
.description = "rebuild an already built package and compare the result to the existing store paths",
.description = "Rebuild an already built package and compare the result to the existing store paths.",
.handler = {&buildMode, bmCheck},
});
}
@ -43,22 +43,11 @@ struct CmdBuild : InstallablesCommand, MixDryRun, MixJSON, MixProfile
return "build a derivation or fetch a store path";
}
Examples examples() override
std::string doc() override
{
return {
Example{
"To build and run GNU Hello from NixOS 17.03:",
"nix build -f channel:nixos-17.03 hello; ./result/bin/hello"
},
Example{
"To build the build.x86_64-linux attribute from release.nix:",
"nix build -f release.nix build.x86_64-linux"
},
Example{
"To make a profile point at GNU Hello:",
"nix build --profile /tmp/profile nixpkgs#hello"
},
};
return
#include "build.md"
;
}
void run(ref<Store> store) override
@ -69,7 +58,8 @@ struct CmdBuild : InstallablesCommand, MixDryRun, MixJSON, MixProfile
if (outLink != "")
if (auto store2 = store.dynamic_pointer_cast<LocalFSStore>())
for (size_t i = 0; i < buildables.size(); ++i)
for (const auto & [_i, buildable] : enumerate(buildables)) {
auto i = _i;
std::visit(overloaded {
[&](BuildableOpaque bo) {
std::string symlink = outLink;
@ -85,7 +75,8 @@ struct CmdBuild : InstallablesCommand, MixDryRun, MixJSON, MixProfile
store2->addPermRoot(output.second, absPath(symlink));
}
},
}, buildables[i]);
}, buildable);
}
updateProfile(buildables);

92
src/nix/build.md Normal file
View file

@ -0,0 +1,92 @@
R""(
# Examples
* Build the default package from the flake in the current directory:
```console
# nix build
```
* Build and run GNU Hello from the `nixpkgs` flake:
```console
# nix build nixpkgs#hello
# ./result/bin/hello
Hello, world!
```
* Build GNU Hello and Cowsay, leaving two result symlinks:
```console
# nix build nixpkgs#hello nixpkgs#cowsay
# ls -l result*
lrwxrwxrwx 1 … result -> /nix/store/v5sv61sszx301i0x6xysaqzla09nksnd-hello-2.10
lrwxrwxrwx 1 … result-1 -> /nix/store/rkfrm0z6x6jmi7d3gsmma4j53h15mg33-cowsay-3.03+dfsg2
```
* Build a specific output:
```console
# nix build nixpkgs#glibc.dev
# ls -ld ./result-dev
lrwxrwxrwx 1 … ./result-dev -> /nix/store/dkm3gwl0xrx0wrw6zi5x3px3lpgjhlw4-glibc-2.32-dev
```
* Build attribute `build.x86_64-linux` from (non-flake) Nix expression
`release.nix`:
```console
# nix build -f release.nix build.x86_64-linux
```
* Build a NixOS system configuration from a flake, and make a profile
point to the result:
```console
# nix build --profile /nix/var/nix/profiles/system \
~/my-configurations#nixosConfigurations.machine.config.system.build.toplevel
```
(This is essentially what `nixos-rebuild` does.)
* Build an expression specified on the command line:
```console
# nix build --impure --expr \
'with import <nixpkgs> {};
runCommand "foo" {
buildInputs = [ hello ];
}
"hello > $out"'
# cat ./result
Hello, world!
```
Note that `--impure` is needed because we're using `<nixpkgs>`,
which relies on the `$NIX_PATH` environment variable.
* Fetch a store path from the configured substituters, if it doesn't
already exist:
```console
# nix build /nix/store/rkfrm0z6x6jmi7d3gsmma4j53h15mg33-cowsay-3.03+dfsg2
```
# Description
`nix build` builds the specified *installables*. Installables that
resolve to derivations are built (or substituted if possible). Store
path installables are substituted.
Unless `--no-link` is specified, after a successful build, it creates
symlinks to the store paths of the installables. These symlinks have
the prefix `./result` by default; this can be overriden using the
`--out-link` option. Each symlink has a suffix `-<N>-<outname>`, where
*N* is the index of the installable (with the left-most installable
having index 0), and *outname* is the symbolic derivation output name
(e.g. `bin`, `dev` or `lib`). `-<N>` is omitted if *N* = 0, and
`-<outname>` is omitted if *outname* = `out` (denoting the default
output).
)""

15
src/nix/bundle.cc
View file

@ -16,7 +16,7 @@ struct CmdBundle : InstallableCommand
{
addFlag({
.longName = "bundler",
.description = "use custom bundler",
.description = fmt("Use a custom bundler instead of the default (`%s`).", bundler),
.labels = {"flake-url"},
.handler = {&bundler},
.completer = {[&](size_t, std::string_view prefix) {
@ -27,7 +27,7 @@ struct CmdBundle : InstallableCommand
addFlag({
.longName = "out-link",
.shortName = 'o',
.description = "path of the symlink to the build result",
.description = "Override the name of the symlink to the build result. It defaults to the base name of the app.",
.labels = {"path"},
.handler = {&outLink},
.completer = completePath
@ -40,14 +40,11 @@ struct CmdBundle : InstallableCommand
return "bundle an application so that it works outside of the Nix store";
}
Examples examples() override
std::string doc() override
{
return {
Example{
"To bundle Hello:",
"nix bundle hello"
},
};
return
#include "bundle.md"
;
}
Category category() override { return catSecondary; }

36
src/nix/bundle.md Normal file
View file

@ -0,0 +1,36 @@
R""(
# Examples
* Bundle Hello:
```console
# nix bundle nixpkgs#hello
# ./hello
Hello, world!
```
* Bundle a specific version of Nix:
```console
# nix bundle github:NixOS/nix/e3ddffb27e5fc37a209cfd843c6f7f6a9460a8ec
# ./nix --version
nix (Nix) 2.4pre20201215_e3ddffb
```
# Description
`nix bundle` packs the closure of the [Nix app](./nix3-run.md)
*installable* into a single self-extracting executable. See the
[`nix-bundle` homepage](https://github.com/matthewbauer/nix-bundle)
for more details.
> **Note**
>
> This command only works on Linux.
# Bundler definitions
TODO
)""

14
src/nix/cat.cc
View file

@ -37,6 +37,13 @@ struct CmdCatStore : StoreCommand, MixCat
return "print the contents of a file in the Nix store on stdout";
}
std::string doc() override
{
return
#include "store-cat.md"
;
}
void run(ref<Store> store) override
{
cat(store->getFSAccessor());
@ -62,6 +69,13 @@ struct CmdCatNar : StoreCommand, MixCat
return "print the contents of a file inside a NAR file on stdout";
}
std::string doc() override
{
return
#include "nar-cat.md"
;
}
void run(ref<Store> store) override
{
cat(makeNarAccessor(make_ref<std::string>(readFile(narPath))));

14
src/nix/command.cc
View file

@ -65,18 +65,18 @@ StorePathsCommand::StorePathsCommand(bool recursive)
if (recursive)
addFlag({
.longName = "no-recursive",
.description = "apply operation to specified paths only",
.description = "Apply operation to specified paths only.",
.handler = {&this->recursive, false},
});
else
addFlag({
.longName = "recursive",
.shortName = 'r',
.description = "apply operation to closure of the specified paths",
.description = "Apply operation to closure of the specified paths.",
.handler = {&this->recursive, true},
});
mkFlag(0, "all", "apply operation to the entire store", &all);
mkFlag(0, "all", "Apply the operation to every store path.", &all);
}
void StorePathsCommand::run(ref<Store> store)
@ -133,7 +133,7 @@ MixProfile::MixProfile()
{
addFlag({
.longName = "profile",
.description = "profile to update",
.description = "The profile to update.",
.labels = {"path"},
.handler = {&profile},
.completer = completePath
@ -190,14 +190,14 @@ MixEnvironment::MixEnvironment() : ignoreEnvironment(false)
addFlag({
.longName = "ignore-environment",
.shortName = 'i',
.description = "clear the entire environment (except those specified with --keep)",
.description = "Clear the entire environment (except those specified with `--keep`).",
.handler = {&ignoreEnvironment, true},
});
addFlag({
.longName = "keep",
.shortName = 'k',
.description = "keep specified environment variable",
.description = "Keep the environment variable *name*.",
.labels = {"name"},
.handler = {[&](std::string s) { keep.insert(s); }},
});
@ -205,7 +205,7 @@ MixEnvironment::MixEnvironment() : ignoreEnvironment(false)
addFlag({
.longName = "unset",
.shortName = 'u',
.description = "unset specified environment variable",
.description = "Unset the environment variable *name*.",
.labels = {"name"},
.handler = {[&](std::string s) { unset.insert(s); }},
});

4
src/nix/command.hh
View file

@ -13,6 +13,8 @@ namespace nix {
extern std::string programPath;
extern char * * savedArgv;
class EvalState;
struct Pos;
class Store;
@ -261,6 +263,8 @@ void completeFlakeRefWithFragment(
const Strings & defaultFlakeAttrPaths,
std::string_view prefix);
std::string showVersions(const std::set<std::string> & versions);
void printClosureDiff(
ref<Store> store,
const StorePath & beforePath,

37
src/nix/copy.cc
View file

@ -21,28 +21,28 @@ struct CmdCopy : StorePathsCommand
{
addFlag({
.longName = "from",
.description = "URI of the source Nix store",
.description = "URL of the source Nix store.",
.labels = {"store-uri"},
.handler = {&srcUri},
});
addFlag({
.longName = "to",
.description = "URI of the destination Nix store",
.description = "URL of the destination Nix store.",
.labels = {"store-uri"},
.handler = {&dstUri},
});
addFlag({
.longName = "no-check-sigs",
.description = "do not require that paths are signed by trusted keys",
.description = "Do not require that paths are signed by trusted keys.",
.handler = {&checkSigs, NoCheckSigs},
});
addFlag({
.longName = "substitute-on-destination",
.shortName = 's',
.description = "whether to try substitutes on the destination store (only supported by SSH)",
.description = "Whether to try substitutes on the destination store (only supported by SSH stores).",
.handler = {&substitute, Substitute},
});
@ -54,32 +54,11 @@ struct CmdCopy : StorePathsCommand
return "copy paths between Nix stores";
}
Examples examples() override
std::string doc() override
{
return {
Example{
"To copy Firefox from the local store to a binary cache in file:///tmp/cache:",
"nix copy --to file:///tmp/cache $(type -p firefox)"
},
Example{
"To copy the entire current NixOS system closure to another machine via SSH:",
"nix copy --to ssh://server /run/current-system"
},
Example{
"To copy a closure from another machine via SSH:",
"nix copy --from ssh://server /nix/store/a6cnl93nk1wxnq84brbbwr6hxw9gp2w9-blender-2.79-rc2"
},
#ifdef ENABLE_S3
Example{
"To copy Hello to an S3 binary cache:",
"nix copy --to s3://my-bucket?region=eu-west-1 nixpkgs#hello"
},
Example{
"To copy Hello to an S3-compatible binary cache:",
"nix copy --to s3://my-bucket?region=eu-west-1&endpoint=example.com nixpkgs#hello"
},
#endif
};
return
#include "copy.md"
;
}
Category category() override { return catSecondary; }

58
src/nix/copy.md Normal file
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@ -0,0 +1,58 @@
R""(
# Examples
* Copy Firefox from the local store to a binary cache in `/tmp/cache`:
```console
# nix copy --to file:///tmp/cache $(type -p firefox)
```
Note the `file://` - without this, the destination is a chroot
store, not a binary cache.
* Copy the entire current NixOS system closure to another machine via
SSH:
```console
# nix copy -s --to ssh://server /run/current-system
```
The `-s` flag causes the remote machine to try to substitute missing
store paths, which may be faster if the link between the local and
remote machines is slower than the link between the remote machine
and its substituters (e.g. `https://cache.nixos.org`).
* Copy a closure from another machine via SSH:
```console
# nix copy --from ssh://server /nix/store/a6cnl93nk1wxnq84brbbwr6hxw9gp2w9-blender-2.79-rc2
```
* Copy Hello to a binary cache in an Amazon S3 bucket:
```console
# nix copy --to s3://my-bucket?region=eu-west-1 nixpkgs#hello
```
or to an S3-compatible storage system:
```console
# nix copy --to s3://my-bucket?region=eu-west-1&endpoint=example.com nixpkgs#hello
```
Note that this only works if Nix is built with AWS support.
* Copy a closure from `/nix/store` to the chroot store `/tmp/nix/nix/store`:
```console
# nix copy --to /tmp/nix nixpkgs#hello --no-check-sigs
```
# Description
`nix copy` copies store path closures between two Nix stores. The
source store is specified using `--from` and the destination using
`--to`. If one of these is omitted, it defaults to the local store.
)""

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