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* Dirty hack to make nix-push work properly on derivations: the

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derivation should be a source rather than a derivation dependency of
  the call to the NAR derivation.  Otherwise the derivation (and all
  its dependencies) will be built as a side-effect, which may not even
  succeed.
This commit is contained in:
Eelco Dolstra 2008-12-04 10:40:41 +00:00
parent 82ae85de27
commit f8713e1287
2 changed files with 24 additions and 10 deletions
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3
scripts/nix-push.in
View file

@ -128,7 +128,7 @@ while (<READ>) {
close READ or die "nix-instantiate failed: $?";
# Realise the store expressions.
# Build the derivations.
print STDERR "creating archives...\n";
my @narPaths;
@ -144,7 +144,6 @@ while (scalar @tmp > 0) {
# reference (see above). Even if that is fixed, using a hook
# probably wouldn't make that much sense; pumping lots of data
# around just to compress them won't gain that much.
$ENV{"NIX_BUILD_HOOK"} = "";
my $pid = open(READ, "$binDir/nix-store --no-build-hook --realise @tmp2|")
or die "cannot run nix-store";
while (<READ>) {

31
src/libexpr/primops.cc
View file

@ -366,12 +366,18 @@ static Expr prim_derivationStrict(EvalState & state, const ATermVector & args)
attributes should be added as dependencies of the resulting
derivation. */
for (PathSet::iterator i = context.begin(); i != context.end(); ++i) {
debug(format("derivation uses `%1%'") % *i);
assert(isStorePath(*i));
if (isDerivation(*i))
drv.inputDrvs[*i] = singleton<StringSet>("out");
Path path = *i;
bool buildDrv = true;
if (path.at(0) == '=') {
buildDrv = false;
path = string(path, 1);
}
debug(format("derivation uses `%1%'") % path);
assert(isStorePath(path));
if (buildDrv && isDerivation(path))
drv.inputDrvs[path] = singleton<StringSet>("out");
else
drv.inputSrcs.insert(*i);
drv.inputSrcs.insert(path);
}
/* Do we have all required attributes? */
@ -498,9 +504,17 @@ static Expr prim_storePath(EvalState & state, const ATermVector & args)
Path path = canonPath(coerceToPath(state, args[0], context));
if (!isInStore(path))
throw EvalError(format("path `%1%' is not in the Nix store") % path);
if (!store->isValidPath(path))
throw EvalError(format("store path `%1%' is not valid") % path);
context.insert(toStorePath(path));
Path path2 = toStorePath(path);
if (!store->isValidPath(path2))
throw EvalError(format("store path `%1%' is not valid") % path2);
/* If this is a derivation, mark it so it doesn't get built;
i.e. we want the dependency as a "source" dependency. This is
to make nix-push work properly (we want it to create a NAR
archive of the derivation, not build the derivation as a
side-effect). The `=' is a special marker that gets stripped
off by prim_derivationStrict. */
if (isDerivation(path2)) path2 = "=" + path2;
context.insert(path2);
return makeStr(path, context);
}
@ -578,6 +592,7 @@ static Expr prim_toFile(EvalState & state, const ATermVector & args)
for (PathSet::iterator i = context.begin(); i != context.end(); ++i) {
if (isDerivation(*i))
throw EvalError(format("in `toFile': the file `%1%' cannot refer to derivation outputs") % name);
/* !!! */
refs.insert(*i);
}