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Merge pull request #5807 from NixOS/5805-ca-ifd

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Fix IFD with CA derivations
This commit is contained in:
Eelco Dolstra 2021-12-21 18:47:34 +01:00 committed by GitHub
parent 881b610266 d90f9d4b99
commit 89faff93e2
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GPG key ID: 4AEE18F83AFDEB23
4 changed files with 76 additions and 51 deletions
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5
src/libexpr/eval.hh
View file

@ -353,7 +353,10 @@ public:
/* Print statistics. */
void printStats();
void realiseContext(const PathSet & context);
/* Realise the given context, and return a mapping from the placeholders
* used to construct the associated value to their final store path
*/
[[nodiscard]] StringMap realiseContext(const PathSet & context);
private:

106
src/libexpr/primops.cc
View file

@ -35,9 +35,10 @@ namespace nix {
InvalidPathError::InvalidPathError(const Path & path) :
EvalError("path '%s' is not valid", path), path(path) {}
void EvalState::realiseContext(const PathSet & context)
StringMap EvalState::realiseContext(const PathSet & context)
{
std::vector<DerivedPath::Built> drvs;
StringMap res;
for (auto & i : context) {
auto [ctxS, outputName] = decodeContext(i);
@ -46,10 +47,12 @@ void EvalState::realiseContext(const PathSet & context)
throw InvalidPathError(store->printStorePath(ctx));
if (!outputName.empty() && ctx.isDerivation()) {
drvs.push_back({ctx, {outputName}});
} else {
res.insert_or_assign(ctxS, ctxS);
}
}
if (drvs.empty()) return;
if (drvs.empty()) return {};
if (!evalSettings.enableImportFromDerivation)
throw Error(
@ -61,21 +64,45 @@ void EvalState::realiseContext(const PathSet & context)
for (auto & d : drvs) buildReqs.emplace_back(DerivedPath { d });
store->buildPaths(buildReqs);
/* Add the output of this derivations to the allowed
paths. */
if (allowedPaths) {
/* Get all the output paths corresponding to the placeholders we had */
for (auto & [drvPath, outputs] : drvs) {
auto outputPaths = store->queryDerivationOutputMap(drvPath);
for (auto & outputName : outputs) {
if (outputPaths.count(outputName) == 0)
throw Error("derivation '%s' does not have an output named '%s'",
store->printStorePath(drvPath), outputName);
allowPath(outputPaths.at(outputName));
res.insert_or_assign(
downstreamPlaceholder(*store, drvPath, outputName),
store->printStorePath(outputPaths.at(outputName))
);
}
}
/* Add the output of this derivations to the allowed
paths. */
if (allowedPaths) {
for (auto & [_placeholder, outputPath] : res) {
allowPath(outputPath);
}
}
return res;
}
static Path realisePath(EvalState & state, const Pos & pos, Value & v, bool requireAbsolutePath = true)
{
PathSet context;
Path path = requireAbsolutePath
? state.coerceToPath(pos, v, context)
: state.coerceToString(pos, v, context, false, false);
StringMap rewrites = state.realiseContext(context);
return state.checkSourcePath(
state.toRealPath(rewriteStrings(path, rewrites), context));
}
/* Add and attribute to the given attribute map from the output name to
the output path, or a placeholder.
@ -109,11 +136,9 @@ static void mkOutputString(EvalState & state, Value & v,
argument. */
static void import(EvalState & state, const Pos & pos, Value & vPath, Value * vScope, Value & v)
{
PathSet context;
Path path = state.coerceToPath(pos, vPath, context);
Path path;
try {
state.realiseContext(context);
path = realisePath(state, pos, vPath);
} catch (InvalidPathError & e) {
throw EvalError({
.msg = hintfmt("cannot import '%1%', since path '%2%' is not valid", path, e.path),
@ -124,8 +149,6 @@ static void import(EvalState & state, const Pos & pos, Value & vPath, Value * vS
throw;
}
Path realPath = state.checkSourcePath(state.toRealPath(path, context));
// FIXME
auto isValidDerivationInStore = [&]() -> std::optional<StorePath> {
if (!state.store->isStorePath(path))
@ -177,7 +200,7 @@ static void import(EvalState & state, const Pos & pos, Value & vPath, Value * vS
else {
if (!vScope)
state.evalFile(realPath, v);
state.evalFile(path, v);
else {
state.forceAttrs(*vScope);
@ -195,8 +218,8 @@ static void import(EvalState & state, const Pos & pos, Value & vPath, Value * vS
// No need to call staticEnv.sort(), because
// args[0]->attrs is already sorted.
printTalkative("evaluating file '%1%'", realPath);
Expr * e = state.parseExprFromFile(resolveExprPath(realPath), staticEnv);
printTalkative("evaluating file '%1%'", path);
Expr * e = state.parseExprFromFile(resolveExprPath(path), staticEnv);
e->eval(state, *env, v);
}
@ -281,22 +304,19 @@ extern "C" typedef void (*ValueInitializer)(EvalState & state, Value & v);
/* Load a ValueInitializer from a DSO and return whatever it initializes */
void prim_importNative(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
PathSet context;
Path path = state.coerceToPath(pos, *args[0], context);
Path path;
try {
state.realiseContext(context);
path = realisePath(state, pos, *args[0]);
} catch (InvalidPathError & e) {
throw EvalError({
.msg = hintfmt(
"cannot import '%1%', since path '%2%' is not valid",
path, e.path),
.msg = hintfmt("cannot import '%1%', since path '%2%' is not valid", path, e.path),
.errPos = pos
});
} catch (Error & e) {
e.addTrace(pos, "while importing '%s'", path);
throw;
}
path = state.checkSourcePath(path);
string sym = state.forceStringNoCtx(*args[1], pos);
void *handle = dlopen(path.c_str(), RTLD_LAZY | RTLD_LOCAL);
@ -338,7 +358,7 @@ void prim_exec(EvalState & state, const Pos & pos, Value * * args, Value & v)
for (unsigned int i = 1; i < args[0]->listSize(); ++i)
commandArgs.emplace_back(state.coerceToString(pos, *elems[i], context, false, false));
try {
state.realiseContext(context);
auto _ = state.realiseContext(context); // FIXME: Handle CA derivations
} catch (InvalidPathError & e) {
throw EvalError({
.msg = hintfmt("cannot execute '%1%', since path '%2%' is not valid",
@ -1349,10 +1369,9 @@ static RegisterPrimOp primop_storePath({
static void prim_pathExists(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
PathSet context;
Path path = state.coerceToPath(pos, *args[0], context);
Path path;
try {
state.realiseContext(context);
path = realisePath(state, pos, *args[0]);
} catch (InvalidPathError & e) {
throw EvalError({
.msg = hintfmt(
@ -1363,7 +1382,7 @@ static void prim_pathExists(EvalState & state, const Pos & pos, Value * * args,
}
try {
mkBool(v, pathExists(state.checkSourcePath(path)));
mkBool(v, pathExists(path));
} catch (SysError & e) {
/* Don't give away info from errors while canonicalising
‘path’ in restricted mode. */
@ -1426,17 +1445,16 @@ static RegisterPrimOp primop_dirOf({
/* Return the contents of a file as a string. */
static void prim_readFile(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
PathSet context;
Path path = state.coerceToPath(pos, *args[0], context);
Path path;
try {
state.realiseContext(context);
path = realisePath(state, pos, *args[0]);
} catch (InvalidPathError & e) {
throw EvalError({
.msg = hintfmt("cannot read '%1%', since path '%2%' is not valid", path, e.path),
.errPos = pos
});
}
string s = readFile(state.checkSourcePath(state.toRealPath(path, context)));
string s = readFile(path);
if (s.find((char) 0) != string::npos)
throw Error("the contents of the file '%1%' cannot be represented as a Nix string", path);
mkString(v, s.c_str());
@ -1475,11 +1493,10 @@ static void prim_findFile(EvalState & state, const Pos & pos, Value * * args, Va
pos
);
PathSet context;
string path = state.coerceToString(pos, *i->value, context, false, false);
Path path;
try {
state.realiseContext(context);
path = realisePath(state, pos, *i->value, false);
} catch (InvalidPathError & e) {
throw EvalError({
.msg = hintfmt("cannot find '%1%', since path '%2%' is not valid", path, e.path),
@ -1512,15 +1529,14 @@ static void prim_hashFile(EvalState & state, const Pos & pos, Value * * args, Va
.errPos = pos
});
PathSet context;
Path path = state.coerceToPath(pos, *args[1], context);
Path path;
try {
state.realiseContext(context);
path = realisePath(state, pos, *args[1]);
} catch (InvalidPathError & e) {
throw EvalError("cannot read '%s' since path '%s' is not valid, at %s", path, e.path, pos);
}
mkString(v, hashFile(*ht, state.checkSourcePath(state.toRealPath(path, context))).to_string(Base16, false));
mkString(v, hashFile(*ht, path).to_string(Base16, false));
}
static RegisterPrimOp primop_hashFile({
@ -1537,10 +1553,9 @@ static RegisterPrimOp primop_hashFile({
/* Read a directory (without . or ..) */
static void prim_readDir(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
PathSet ctx;
Path path = state.coerceToPath(pos, *args[0], ctx);
Path path;
try {
state.realiseContext(ctx);
path = realisePath(state, pos, *args[0]);
} catch (InvalidPathError & e) {
throw EvalError({
.msg = hintfmt("cannot read '%1%', since path '%2%' is not valid", path, e.path),
@ -1548,7 +1563,7 @@ static void prim_readDir(EvalState & state, const Pos & pos, Value * * args, Val
});
}
DirEntries entries = readDirectory(state.checkSourcePath(path));
DirEntries entries = readDirectory(path);
state.mkAttrs(v, entries.size());
for (auto & ent : entries) {
@ -1875,7 +1890,8 @@ static void addPath(
try {
// FIXME: handle CA derivation outputs (where path needs to
// be rewritten to the actual output).
state.realiseContext(context);
auto rewrites = state.realiseContext(context);
path = state.toRealPath(rewriteStrings(path, rewrites), context);
StorePathSet refs;

6
tests/ca/import-derivation.sh Normal file
View file

@ -0,0 +1,6 @@
source common.sh
export NIX_TESTS_CA_BY_DEFAULT=1
cd .. && source import-derivation.sh

2
tests/local.mk
View file

@ -11,7 +11,7 @@ nix_tests = \
local-store.sh remote-store.sh export.sh export-graph.sh \
db-migration.sh \
timeout.sh secure-drv-outputs.sh nix-channel.sh \
multiple-outputs.sh import-derivation.sh fetchurl.sh optimise-store.sh \
multiple-outputs.sh import-derivation.sh ca/import-derivation.sh fetchurl.sh optimise-store.sh \
binary-cache.sh \
substitute-with-invalid-ca.sh \
binary-cache-build-remote.sh \