Fix IFD with CA derivations

Rewrite the string taken by the IFD-like primops to contain the actual
output paths of the derivations rather than the placeholders

Fix #5805
This commit is contained in:
regnat 2021-12-20 19:46:55 +01:00
parent cbbd21ec07
commit d90f9d4b99
4 changed files with 40 additions and 16 deletions

View file

@ -350,7 +350,10 @@ 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:

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(
@ -61,19 +64,29 @@ 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)
@ -84,9 +97,10 @@ static Path realisePath(EvalState & state, const Pos & pos, Value & v, bool requ
? state.coerceToPath(pos, v, context)
: state.coerceToString(pos, v, context, false, false);
state.realiseContext(context);
StringMap rewrites = state.realiseContext(context);
return state.checkSourcePath(state.toRealPath(path, context));
return state.checkSourcePath(
state.toRealPath(rewriteStrings(path, rewrites), context));
}
/* Add and attribute to the given attribute map from the output name to
@ -344,7 +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",
@ -1876,7 +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;

View file

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

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 \