710 lines
22 KiB
C++
710 lines
22 KiB
C++
#include <algorithm>
|
|
|
|
#include "build.hh"
|
|
#include "misc.hh"
|
|
#include "eval.hh"
|
|
#include "globals.hh"
|
|
#include "nixexpr-ast.hh"
|
|
#include "expr-to-xml.hh"
|
|
|
|
|
|
static Expr primBuiltins(EvalState & state, const ATermVector & args)
|
|
{
|
|
/* Return an attribute set containing all primops. This allows
|
|
Nix expressions to test for new primops and take appropriate
|
|
action if they're not available. For instance, rather than
|
|
calling a primop `foo' directly, they could say `if builtins ?
|
|
foo then builtins.foo ... else ...'. */
|
|
|
|
ATermMap builtins(128);
|
|
|
|
for (ATermMap::const_iterator i = state.primOps.begin();
|
|
i != state.primOps.end(); ++i)
|
|
{
|
|
string name = aterm2String(i->key);
|
|
if (string(name, 0, 2) == "__")
|
|
name = string(name, 2);
|
|
/* !!! should use makePrimOp here, I guess. */
|
|
builtins.set(toATerm(name), makeAttrRHS(makeVar(i->key), makeNoPos()));
|
|
}
|
|
|
|
return makeAttrs(builtins);
|
|
}
|
|
|
|
|
|
/* Load and evaluate an expression from path specified by the
|
|
argument. */
|
|
static Expr primImport(EvalState & state, const ATermVector & args)
|
|
{
|
|
ATermList es;
|
|
Path path;
|
|
|
|
Expr arg = evalExpr(state, args[0]), arg2;
|
|
|
|
if (matchPath(arg, arg2))
|
|
path = aterm2String(arg2);
|
|
|
|
else if (matchAttrs(arg, es)) {
|
|
Expr a = queryAttr(arg, "type");
|
|
|
|
/* If it is a derivation, we have to realise it and load the
|
|
Nix expression created at the derivation's output path. */
|
|
if (a && evalString(state, a) == "derivation") {
|
|
a = queryAttr(arg, "drvPath");
|
|
if (!a) throw EvalError("bad derivation in import");
|
|
Path drvPath = evalPath(state, a);
|
|
|
|
buildDerivations(singleton<PathSet>(drvPath));
|
|
|
|
a = queryAttr(arg, "outPath");
|
|
if (!a) throw EvalError("bad derivation in import");
|
|
path = evalPath(state, a);
|
|
}
|
|
}
|
|
|
|
if (path == "")
|
|
throw TypeError("`import' requires a path or derivation as its argument");
|
|
|
|
return evalFile(state, path);
|
|
}
|
|
|
|
|
|
/* Returns the hash of a derivation modulo fixed-output
|
|
subderivations. A fixed-output derivation is a derivation with one
|
|
output (`out') for which an expected hash and hash algorithm are
|
|
specified (using the `outputHash' and `outputHashAlgo'
|
|
attributes). We don't want changes to such derivations to
|
|
propagate upwards through the dependency graph, changing output
|
|
paths everywhere.
|
|
|
|
For instance, if we change the url in a call to the `fetchurl'
|
|
function, we do not want to rebuild everything depending on it
|
|
(after all, (the hash of) the file being downloaded is unchanged).
|
|
So the *output paths* should not change. On the other hand, the
|
|
*derivation store expression paths* should change to reflect the
|
|
new dependency graph.
|
|
|
|
That's what this function does: it returns a hash which is just the
|
|
of the derivation ATerm, except that any input store expression
|
|
paths have been replaced by the result of a recursive call to this
|
|
function, and that for fixed-output derivations we return
|
|
(basically) its outputHash. */
|
|
static Hash hashDerivationModulo(EvalState & state, Derivation drv)
|
|
{
|
|
/* Return a fixed hash for fixed-output derivations. */
|
|
if (drv.outputs.size() == 1) {
|
|
DerivationOutputs::const_iterator i = drv.outputs.begin();
|
|
if (i->first == "out" &&
|
|
i->second.hash != "")
|
|
{
|
|
return hashString(htSHA256, "fixed:out:"
|
|
+ i->second.hashAlgo + ":"
|
|
+ i->second.hash + ":"
|
|
+ i->second.path);
|
|
}
|
|
}
|
|
|
|
/* For other derivations, replace the inputs paths with recursive
|
|
calls to this function.*/
|
|
DerivationInputs inputs2;
|
|
for (DerivationInputs::iterator i = drv.inputDrvs.begin();
|
|
i != drv.inputDrvs.end(); ++i)
|
|
{
|
|
Hash h = state.drvHashes[i->first];
|
|
if (h.type == htUnknown) {
|
|
Derivation drv2 = derivationFromPath(i->first);
|
|
h = hashDerivationModulo(state, drv2);
|
|
state.drvHashes[i->first] = h;
|
|
}
|
|
inputs2[printHash(h)] = i->second;
|
|
}
|
|
drv.inputDrvs = inputs2;
|
|
|
|
return hashTerm(unparseDerivation(drv));
|
|
}
|
|
|
|
|
|
static void processBinding(EvalState & state, Expr e, Derivation & drv,
|
|
Strings & ss)
|
|
{
|
|
e = evalExpr(state, e);
|
|
|
|
ATerm s;
|
|
ATermList es;
|
|
int n;
|
|
Expr e1, e2;
|
|
|
|
if (matchContext(e, es, e2)) {
|
|
e = e2;
|
|
for (ATermIterator i(es); i; ++i) {
|
|
Strings dummy;
|
|
processBinding(state, *i, drv, dummy);
|
|
}
|
|
}
|
|
|
|
if (matchStr(e, s)) ss.push_back(aterm2String(s));
|
|
else if (matchUri(e, s)) ss.push_back(aterm2String(s));
|
|
else if (e == eTrue) ss.push_back("1");
|
|
else if (e == eFalse) ss.push_back("");
|
|
else if (matchInt(e, n)) ss.push_back(int2String(n));
|
|
|
|
else if (matchAttrs(e, es)) {
|
|
Expr a = queryAttr(e, "type");
|
|
|
|
if (a && evalString(state, a) == "derivation") {
|
|
a = queryAttr(e, "drvPath");
|
|
if (!a) throw EvalError("derivation name missing");
|
|
Path drvPath = evalPath(state, a);
|
|
|
|
a = queryAttr(e, "outPath");
|
|
if (!a) throw EvalError("output path missing");
|
|
/* !!! supports only single output path */
|
|
Path outPath = evalPath(state, a);
|
|
|
|
drv.inputDrvs[drvPath] = singleton<StringSet>("out");
|
|
ss.push_back(outPath);
|
|
}
|
|
|
|
else throw TypeError("attribute sets in derivations must be derivations");
|
|
}
|
|
|
|
else if (matchPath(e, s)) {
|
|
Path srcPath(canonPath(aterm2String(s)));
|
|
|
|
if (isStorePath(srcPath)) {
|
|
printMsg(lvlChatty, format("using store path `%1%' as source")
|
|
% srcPath);
|
|
drv.inputSrcs.insert(srcPath);
|
|
ss.push_back(srcPath);
|
|
}
|
|
|
|
else {
|
|
if (isDerivation(srcPath))
|
|
throw EvalError(format("file names are not allowed to end in `%1%'")
|
|
% drvExtension);
|
|
Path dstPath;
|
|
if (state.srcToStore[srcPath] != "")
|
|
dstPath = state.srcToStore[srcPath];
|
|
else {
|
|
dstPath = addToStore(srcPath);
|
|
state.srcToStore[srcPath] = dstPath;
|
|
printMsg(lvlChatty, format("copied source `%1%' -> `%2%'")
|
|
% srcPath % dstPath);
|
|
}
|
|
drv.inputSrcs.insert(dstPath);
|
|
ss.push_back(dstPath);
|
|
}
|
|
}
|
|
|
|
else if (matchList(e, es)) {
|
|
for (ATermIterator i(es); i; ++i) {
|
|
startNest(nest, lvlVomit, format("processing list element"));
|
|
processBinding(state, evalExpr(state, *i), drv, ss);
|
|
}
|
|
}
|
|
|
|
else if (matchNull(e)) ss.push_back("");
|
|
|
|
else if (matchSubPath(e, e1, e2)) {
|
|
static bool warn = false;
|
|
if (!warn) {
|
|
printMsg(lvlError, "warning: the subpath operator (~) is deprecated, use string concatenation (+) instead");
|
|
warn = true;
|
|
}
|
|
Strings ss2;
|
|
processBinding(state, evalExpr(state, e1), drv, ss2);
|
|
if (ss2.size() != 1)
|
|
throw TypeError("left-hand side of `~' operator cannot be a list");
|
|
e2 = evalExpr(state, e2);
|
|
if (!(matchStr(e2, s) || matchPath(e2, s)))
|
|
throw TypeError("right-hand side of `~' operator must be a path or string");
|
|
ss.push_back(canonPath(ss2.front() + "/" + aterm2String(s)));
|
|
}
|
|
|
|
else throw TypeError(format("%1% is not allowed as a derivation argument") % showType(e));
|
|
}
|
|
|
|
|
|
static string concatStrings(const Strings & ss)
|
|
{
|
|
string s;
|
|
bool first = true;
|
|
for (Strings::const_iterator i = ss.begin(); i != ss.end(); ++i) {
|
|
if (!first) s += " "; else first = false;
|
|
s += *i;
|
|
}
|
|
return s;
|
|
}
|
|
|
|
|
|
/* Construct (as a unobservable side effect) a Nix derivation
|
|
expression that performs the derivation described by the argument
|
|
set. Returns the original set extended with the following
|
|
attributes: `outPath' containing the primary output path of the
|
|
derivation; `drvPath' containing the path of the Nix expression;
|
|
and `type' set to `derivation' to indicate that this is a
|
|
derivation. */
|
|
static Expr primDerivationStrict(EvalState & state, const ATermVector & args)
|
|
{
|
|
startNest(nest, lvlVomit, "evaluating derivation");
|
|
|
|
ATermMap attrs(128); /* !!! */
|
|
queryAllAttrs(evalExpr(state, args[0]), attrs, true);
|
|
|
|
/* Figure out the name already (for stack backtraces). */
|
|
Expr eDrvName = attrs.get(toATerm("name"));
|
|
if (!eDrvName)
|
|
throw EvalError("required attribute `name' missing");
|
|
ATerm posDrvName;
|
|
if (!matchAttrRHS(eDrvName, eDrvName, posDrvName)) abort();
|
|
string drvName = evalString(state, eDrvName);
|
|
|
|
/* Build the derivation expression by processing the attributes. */
|
|
Derivation drv;
|
|
|
|
string outputHash;
|
|
string outputHashAlgo;
|
|
bool outputHashRecursive = false;
|
|
|
|
for (ATermMap::const_iterator i = attrs.begin(); i != attrs.end(); ++i) {
|
|
string key = aterm2String(i->key);
|
|
ATerm value;
|
|
Expr pos;
|
|
ATerm rhs = i->value;
|
|
if (!matchAttrRHS(rhs, value, pos)) abort();
|
|
startNest(nest, lvlVomit, format("processing attribute `%1%'") % key);
|
|
|
|
Strings ss;
|
|
try {
|
|
processBinding(state, value, drv, ss);
|
|
} catch (Error & e) {
|
|
e.addPrefix(format("while processing the derivation attribute `%1%' at %2%:\n")
|
|
% key % showPos(pos));
|
|
e.addPrefix(format("while instantiating the derivation named `%1%' at %2%:\n")
|
|
% drvName % showPos(posDrvName));
|
|
throw;
|
|
}
|
|
|
|
/* The `args' attribute is special: it supplies the
|
|
command-line arguments to the builder. */
|
|
if (key == "args") {
|
|
for (Strings::iterator i = ss.begin(); i != ss.end(); ++i)
|
|
drv.args.push_back(*i);
|
|
}
|
|
|
|
/* All other attributes are passed to the builder through the
|
|
environment. */
|
|
else {
|
|
string s = concatStrings(ss);
|
|
drv.env[key] = s;
|
|
if (key == "builder") drv.builder = s;
|
|
else if (key == "system") drv.platform = s;
|
|
else if (key == "name") drvName = s;
|
|
else if (key == "outputHash") outputHash = s;
|
|
else if (key == "outputHashAlgo") outputHashAlgo = s;
|
|
else if (key == "outputHashMode") {
|
|
if (s == "recursive") outputHashRecursive = true;
|
|
else if (s == "flat") outputHashRecursive = false;
|
|
else throw EvalError(format("invalid value `%1%' for `outputHashMode' attribute") % s);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Do we have all required attributes? */
|
|
if (drv.builder == "")
|
|
throw EvalError("required attribute `builder' missing");
|
|
if (drv.platform == "")
|
|
throw EvalError("required attribute `system' missing");
|
|
|
|
/* If an output hash was given, check it. */
|
|
if (outputHash == "")
|
|
outputHashAlgo = "";
|
|
else {
|
|
HashType ht = parseHashType(outputHashAlgo);
|
|
if (ht == htUnknown)
|
|
throw EvalError(format("unknown hash algorithm `%1%'") % outputHashAlgo);
|
|
Hash h;
|
|
if (outputHash.size() == Hash(ht).hashSize * 2)
|
|
/* hexadecimal representation */
|
|
h = parseHash(ht, outputHash);
|
|
else
|
|
/* base-32 representation */
|
|
h = parseHash32(ht, outputHash);
|
|
string s = outputHash;
|
|
outputHash = printHash(h);
|
|
if (outputHashRecursive) outputHashAlgo = "r:" + outputHashAlgo;
|
|
}
|
|
|
|
/* Check the derivation name. It shouldn't contain whitespace,
|
|
but we are conservative here: we check whether only
|
|
alphanumerics and some other characters appear. */
|
|
checkStoreName(drvName);
|
|
if (isDerivation(drvName))
|
|
throw EvalError(format("derivation names are not allowed to end in `%1%'")
|
|
% drvExtension);
|
|
|
|
/* !!! the name should not end in the derivation extension (.drv).
|
|
Likewise for sources. */
|
|
|
|
/* Construct the "masked" derivation store expression, which is
|
|
the final one except that in the list of outputs, the output
|
|
paths are empty, and the corresponding environment variables
|
|
have an empty value. This ensures that changes in the set of
|
|
output names do get reflected in the hash. */
|
|
drv.env["out"] = "";
|
|
drv.outputs["out"] =
|
|
DerivationOutput("", outputHashAlgo, outputHash);
|
|
|
|
/* Use the masked derivation expression to compute the output
|
|
path. */
|
|
Path outPath = makeStorePath("output:out",
|
|
hashDerivationModulo(state, drv), drvName);
|
|
|
|
/* Construct the final derivation store expression. */
|
|
drv.env["out"] = outPath;
|
|
drv.outputs["out"] =
|
|
DerivationOutput(outPath, outputHashAlgo, outputHash);
|
|
|
|
/* Write the resulting term into the Nix store directory. */
|
|
Path drvPath = writeDerivation(drv, drvName);
|
|
|
|
printMsg(lvlChatty, format("instantiated `%1%' -> `%2%'")
|
|
% drvName % drvPath);
|
|
|
|
/* Optimisation, but required in read-only mode! because in that
|
|
case we don't actually write store expressions, so we can't
|
|
read them later. */
|
|
state.drvHashes[drvPath] = hashDerivationModulo(state, drv);
|
|
|
|
/* !!! assumes a single output */
|
|
ATermMap outAttrs(2);
|
|
outAttrs.set(toATerm("outPath"),
|
|
makeAttrRHS(makePath(toATerm(outPath)), makeNoPos()));
|
|
outAttrs.set(toATerm("drvPath"),
|
|
makeAttrRHS(makePath(toATerm(drvPath)), makeNoPos()));
|
|
|
|
return makeAttrs(outAttrs);
|
|
}
|
|
|
|
|
|
static Expr primDerivationLazy(EvalState & state, const ATermVector & args)
|
|
{
|
|
Expr eAttrs = evalExpr(state, args[0]);
|
|
ATermMap attrs(128); /* !!! */
|
|
queryAllAttrs(eAttrs, attrs, true);
|
|
|
|
attrs.set(toATerm("type"),
|
|
makeAttrRHS(makeStr(toATerm("derivation")), makeNoPos()));
|
|
|
|
Expr drvStrict = makeCall(makeVar(toATerm("derivation!")), eAttrs);
|
|
|
|
attrs.set(toATerm("outPath"),
|
|
makeAttrRHS(makeSelect(drvStrict, toATerm("outPath")), makeNoPos()));
|
|
attrs.set(toATerm("drvPath"),
|
|
makeAttrRHS(makeSelect(drvStrict, toATerm("drvPath")), makeNoPos()));
|
|
|
|
return makeAttrs(attrs);
|
|
}
|
|
|
|
|
|
/* Return the base name of the given string, i.e., everything
|
|
following the last slash. */
|
|
static Expr primBaseNameOf(EvalState & state, const ATermVector & args)
|
|
{
|
|
return makeStr(toATerm(baseNameOf(evalString(state, args[0]))));
|
|
}
|
|
|
|
|
|
/* Return the directory of the given path, i.e., everything before the
|
|
last slash. */
|
|
static Expr primDirOf(EvalState & state, const ATermVector & args)
|
|
{
|
|
return makePath(toATerm(dirOf(evalPath(state, args[0]))));
|
|
}
|
|
|
|
|
|
ATerm coerceToString(Expr e)
|
|
{
|
|
ATerm s;
|
|
if (matchStr(e, s) || matchPath(e, s) || matchUri(e, s))
|
|
return s;
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* Convert the argument (which can be a path or a uri) to a string. */
|
|
static Expr primToString(EvalState & state, const ATermVector & args)
|
|
{
|
|
ATermList context = ATempty;
|
|
bool dummy;
|
|
string s = coerceToStringWithContext(state, context, args[0], dummy);
|
|
return wrapInContext(context, makeStr(toATerm(s)));
|
|
}
|
|
|
|
|
|
static Expr primToXML(EvalState & state, const ATermVector & args)
|
|
{
|
|
ostringstream out;
|
|
printTermAsXML(strictEvalExpr(state, args[0]), out);
|
|
return makeStr(toATerm(out.str()));
|
|
}
|
|
|
|
|
|
/* Boolean constructors. */
|
|
static Expr primTrue(EvalState & state, const ATermVector & args)
|
|
{
|
|
return eTrue;
|
|
}
|
|
|
|
|
|
static Expr primFalse(EvalState & state, const ATermVector & args)
|
|
{
|
|
return eFalse;
|
|
}
|
|
|
|
|
|
/* Return the null value. */
|
|
static Expr primNull(EvalState & state, const ATermVector & args)
|
|
{
|
|
return makeNull();
|
|
}
|
|
|
|
|
|
/* Determine whether the argument is the null value. */
|
|
static Expr primIsNull(EvalState & state, const ATermVector & args)
|
|
{
|
|
return makeBool(matchNull(evalExpr(state, args[0])));
|
|
}
|
|
|
|
|
|
static Path findDependency(Path dir, string dep)
|
|
{
|
|
if (dep[0] == '/') throw EvalError(
|
|
format("illegal absolute dependency `%1%'") % dep);
|
|
|
|
Path p = canonPath(dir + "/" + dep);
|
|
|
|
if (pathExists(p))
|
|
return p;
|
|
else
|
|
return "";
|
|
}
|
|
|
|
|
|
/* Make path `p' relative to directory `pivot'. E.g.,
|
|
relativise("/a/b/c", "a/b/x/y") => "../x/y". Both input paths
|
|
should be in absolute canonical form. */
|
|
static string relativise(Path pivot, Path p)
|
|
{
|
|
assert(pivot.size() > 0 && pivot[0] == '/');
|
|
assert(p.size() > 0 && p[0] == '/');
|
|
|
|
if (pivot == p) return ".";
|
|
|
|
/* `p' is in `pivot'? */
|
|
Path pivot2 = pivot + "/";
|
|
if (p.substr(0, pivot2.size()) == pivot2) {
|
|
return p.substr(pivot2.size());
|
|
}
|
|
|
|
/* Otherwise, `p' is in a parent of `pivot'. Find up till which
|
|
path component `p' and `pivot' match, and add an appropriate
|
|
number of `..' components. */
|
|
string::size_type i = 1;
|
|
while (1) {
|
|
string::size_type j = pivot.find('/', i);
|
|
if (j == string::npos) break;
|
|
j++;
|
|
if (pivot.substr(0, j) != p.substr(0, j)) break;
|
|
i = j;
|
|
}
|
|
|
|
string prefix;
|
|
unsigned int slashes = count(pivot.begin() + i, pivot.end(), '/') + 1;
|
|
while (slashes--) {
|
|
prefix += "../";
|
|
}
|
|
|
|
return prefix + p.substr(i);
|
|
}
|
|
|
|
|
|
static Expr primDependencyClosure(EvalState & state, const ATermVector & args)
|
|
{
|
|
startNest(nest, lvlDebug, "finding dependencies");
|
|
|
|
Expr attrs = evalExpr(state, args[0]);
|
|
|
|
/* Get the start set. */
|
|
Expr startSet = queryAttr(attrs, "startSet");
|
|
if (!startSet) throw EvalError("attribute `startSet' required");
|
|
ATermList startSet2 = evalList(state, startSet);
|
|
|
|
Path pivot;
|
|
PathSet workSet;
|
|
for (ATermIterator i(startSet2); i; ++i) {
|
|
Path p = evalPath(state, *i);
|
|
workSet.insert(p);
|
|
pivot = dirOf(p);
|
|
}
|
|
|
|
/* Get the search path. */
|
|
PathSet searchPath;
|
|
Expr e = queryAttr(attrs, "searchPath");
|
|
if (e) {
|
|
ATermList list = evalList(state, e);
|
|
for (ATermIterator i(list); i; ++i) {
|
|
Path p = evalPath(state, *i);
|
|
searchPath.insert(p);
|
|
}
|
|
}
|
|
|
|
Expr scanner = queryAttr(attrs, "scanner");
|
|
if (!scanner) throw EvalError("attribute `scanner' required");
|
|
|
|
/* Construct the dependency closure by querying the dependency of
|
|
each path in `workSet', adding the dependencies to
|
|
`workSet'. */
|
|
PathSet doneSet;
|
|
while (!workSet.empty()) {
|
|
Path path = *(workSet.begin());
|
|
workSet.erase(path);
|
|
|
|
if (doneSet.find(path) != doneSet.end()) continue;
|
|
doneSet.insert(path);
|
|
|
|
try {
|
|
|
|
/* Call the `scanner' function with `path' as argument. */
|
|
debug(format("finding dependencies in `%1%'") % path);
|
|
ATermList deps = evalList(state, makeCall(scanner, makePath(toATerm(path))));
|
|
|
|
/* Try to find the dependencies relative to the `path'. */
|
|
for (ATermIterator i(deps); i; ++i) {
|
|
string s = evalString(state, *i);
|
|
|
|
Path dep = findDependency(dirOf(path), s);
|
|
|
|
if (dep == "") {
|
|
for (PathSet::iterator j = searchPath.begin();
|
|
j != searchPath.end(); ++j)
|
|
{
|
|
dep = findDependency(*j, s);
|
|
if (dep != "") break;
|
|
}
|
|
}
|
|
|
|
if (dep == "")
|
|
debug(format("did NOT find dependency `%1%'") % s);
|
|
else {
|
|
debug(format("found dependency `%1%'") % dep);
|
|
workSet.insert(dep);
|
|
}
|
|
}
|
|
|
|
} catch (Error & e) {
|
|
e.addPrefix(format("while finding dependencies in `%1%':\n")
|
|
% path);
|
|
throw;
|
|
}
|
|
}
|
|
|
|
/* Return a list of the dependencies we've just found. */
|
|
ATermList deps = ATempty;
|
|
for (PathSet::iterator i = doneSet.begin(); i != doneSet.end(); ++i) {
|
|
deps = ATinsert(deps, makeStr(toATerm(relativise(pivot, *i))));
|
|
deps = ATinsert(deps, makePath(toATerm(*i)));
|
|
}
|
|
|
|
debug(format("dependency list is `%1%'") % makeList(deps));
|
|
|
|
return makeList(deps);
|
|
}
|
|
|
|
|
|
static Expr primAbort(EvalState & state, const ATermVector & args)
|
|
{
|
|
throw Abort(format("evaluation aborted with the following error message: `%1%'") %
|
|
evalString(state, args[0]));
|
|
}
|
|
|
|
|
|
/* Apply a function to every element of a list. */
|
|
static Expr primMap(EvalState & state, const ATermVector & args)
|
|
{
|
|
Expr fun = evalExpr(state, args[0]);
|
|
ATermList list = evalList(state, args[1]);
|
|
|
|
ATermList res = ATempty;
|
|
for (ATermIterator i(list); i; ++i)
|
|
res = ATinsert(res, makeCall(fun, *i));
|
|
|
|
return makeList(ATreverse(res));
|
|
}
|
|
|
|
|
|
/* Return a string constant representing the current platform. Note!
|
|
that differs between platforms, so Nix expressions using
|
|
`__currentSystem' can evaluate to different values on different
|
|
platforms. */
|
|
static Expr primCurrentSystem(EvalState & state, const ATermVector & args)
|
|
{
|
|
return makeStr(toATerm(thisSystem));
|
|
}
|
|
|
|
|
|
static Expr primCurrentTime(EvalState & state, const ATermVector & args)
|
|
{
|
|
return ATmake("Int(<int>)", time(0));
|
|
}
|
|
|
|
|
|
static Expr primRemoveAttrs(EvalState & state, const ATermVector & args)
|
|
{
|
|
ATermMap attrs(128); /* !!! */
|
|
queryAllAttrs(evalExpr(state, args[0]), attrs, true);
|
|
|
|
ATermList list = evalList(state, args[1]);
|
|
|
|
for (ATermIterator i(list); i; ++i)
|
|
/* It's not an error for *i not to exist. */
|
|
attrs.remove(toATerm(evalString(state, *i)));
|
|
|
|
return makeAttrs(attrs);
|
|
}
|
|
|
|
|
|
static Expr primRelativise(EvalState & state, const ATermVector & args)
|
|
{
|
|
Path pivot = evalPath(state, args[0]);
|
|
Path path = evalPath(state, args[1]);
|
|
return makeStr(toATerm(relativise(pivot, path)));
|
|
}
|
|
|
|
|
|
void EvalState::addPrimOps()
|
|
{
|
|
addPrimOp("builtins", 0, primBuiltins);
|
|
|
|
addPrimOp("true", 0, primTrue);
|
|
addPrimOp("false", 0, primFalse);
|
|
addPrimOp("null", 0, primNull);
|
|
addPrimOp("__currentSystem", 0, primCurrentSystem);
|
|
addPrimOp("__currentTime", 0, primCurrentTime);
|
|
|
|
addPrimOp("import", 1, primImport);
|
|
addPrimOp("derivation!", 1, primDerivationStrict);
|
|
addPrimOp("derivation", 1, primDerivationLazy);
|
|
addPrimOp("baseNameOf", 1, primBaseNameOf);
|
|
addPrimOp("dirOf", 1, primDirOf);
|
|
addPrimOp("toString", 1, primToString);
|
|
addPrimOp("__toXML", 1, primToXML);
|
|
addPrimOp("isNull", 1, primIsNull);
|
|
addPrimOp("dependencyClosure", 1, primDependencyClosure);
|
|
addPrimOp("abort", 1, primAbort);
|
|
|
|
addPrimOp("map", 2, primMap);
|
|
addPrimOp("removeAttrs", 2, primRemoveAttrs);
|
|
addPrimOp("relativise", 2, primRelativise);
|
|
}
|