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Merge pull request #4370 from NixOS/ca/more-precise-build-noop

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Better detect when `buildPaths` would be a no-op
This commit is contained in:
Eelco Dolstra 2020-12-16 14:54:04 +01:00 committed by GitHub
commit ae3c3e3bb2
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1 changed files with 11 additions and 3 deletions
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14
src/libstore/store-api.cc
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@ -729,9 +729,17 @@ void Store::buildPaths(const std::vector<StorePathWithOutputs> & paths, BuildMod
StorePathSet paths2; StorePathSet paths2;
for (auto & path : paths) { for (auto & path : paths) {
if (path.path.isDerivation()) if (path.path.isDerivation()) {
unsupported("buildPaths"); if (settings.isExperimentalFeatureEnabled("ca-derivations")) {
paths2.insert(path.path); for (auto & outputName : path.outputs) {
if (!queryRealisation({path.path, outputName}))
unsupported("buildPaths");
}
} else
unsupported("buildPaths");
} else
paths2.insert(path.path);
} }
if (queryValidPaths(paths2).size() != paths2.size()) if (queryValidPaths(paths2).size() != paths2.size())