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Fix empty 'nix copy' error message

Browse source 
This was caused by SubstitutionGoal not setting the errorMsg field in
its BuildResult. We now get a more descriptive message than in 2.7.0, e.g.

  error: path '/nix/store/13mh...' is required, but there is no substituter that can build it

instead of the misleading (since there was no build)

  error: build of '/nix/store/13mh...' failed

Fixes #6295.
This commit is contained in:
Eelco Dolstra 2022-04-06 12:41:18 +02:00
parent fbeb8fd1b4
commit 318936366d
3 changed files with 19 additions and 7 deletions
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2
src/libstore/build/drv-output-substitution-goal.cc
View file

@ -41,7 +41,7 @@ void DrvOutputSubstitutionGoal::tryNext()
if (subs.size() == 0) { if (subs.size() == 0) {
/* None left. Terminate this goal and let someone else deal /* None left. Terminate this goal and let someone else deal
with it. */ with it. */
debug("drv output '%s' is required, but there is no substituter that can provide it", id.to_string()); debug("derivation output '%s' is required, but there is no substituter that can provide it", id.to_string());
/* Hack: don't indicate failure if there were no substituters. /* Hack: don't indicate failure if there were no substituters.
In that case the calling derivation should just do a In that case the calling derivation should just do a

19
src/libstore/build/substitution-goal.cc
View file

@ -24,9 +24,16 @@ PathSubstitutionGoal::~PathSubstitutionGoal()
} }
void PathSubstitutionGoal::done(ExitCode result, BuildResult::Status status) void PathSubstitutionGoal::done(
ExitCode result,
BuildResult::Status status,
std::optional<std::string> errorMsg)
{ {
buildResult.status = status; buildResult.status = status;
if (errorMsg) {
debug(*errorMsg);
buildResult.errorMsg = *errorMsg;
}
amDone(result); amDone(result);
} }
@ -67,12 +74,14 @@ void PathSubstitutionGoal::tryNext()
if (subs.size() == 0) { if (subs.size() == 0) {
/* None left. Terminate this goal and let someone else deal /* None left. Terminate this goal and let someone else deal
with it. */ with it. */
debug("path '%s' is required, but there is no substituter that can build it", worker.store.printStorePath(storePath));
/* Hack: don't indicate failure if there were no substituters. /* Hack: don't indicate failure if there were no substituters.
In that case the calling derivation should just do a In that case the calling derivation should just do a
build. */ build. */
done(substituterFailed ? ecFailed : ecNoSubstituters, BuildResult::NoSubstituters); done(
substituterFailed ? ecFailed : ecNoSubstituters,
BuildResult::NoSubstituters,
fmt("path '%s' is required, but there is no substituter that can build it", worker.store.printStorePath(storePath)));
if (substituterFailed) { if (substituterFailed) {
worker.failedSubstitutions++; worker.failedSubstitutions++;
@ -169,10 +178,10 @@ void PathSubstitutionGoal::referencesValid()
trace("all references realised"); trace("all references realised");
if (nrFailed > 0) { if (nrFailed > 0) {
debug("some references of path '%s' could not be realised", worker.store.printStorePath(storePath));
done( done(
nrNoSubstituters > 0 || nrIncompleteClosure > 0 ? ecIncompleteClosure : ecFailed, nrNoSubstituters > 0 || nrIncompleteClosure > 0 ? ecIncompleteClosure : ecFailed,
BuildResult::DependencyFailed); BuildResult::DependencyFailed,
fmt("some references of path '%s' could not be realised", worker.store.printStorePath(storePath)));
return; return;
} }

5
src/libstore/build/substitution-goal.hh
View file

@ -53,7 +53,10 @@ struct PathSubstitutionGoal : public Goal
/* Content address for recomputing store path */ /* Content address for recomputing store path */
std::optional<ContentAddress> ca; std::optional<ContentAddress> ca;
void done(ExitCode result, BuildResult::Status status); void done(
ExitCode result,
BuildResult::Status status,
std::optional<std::string> errorMsg = {});
public: public:
PathSubstitutionGoal(const StorePath & storePath, Worker & worker, RepairFlag repair = NoRepair, std::optional<ContentAddress> ca = std::nullopt); PathSubstitutionGoal(const StorePath & storePath, Worker & worker, RepairFlag repair = NoRepair, std::optional<ContentAddress> ca = std::nullopt);