diff options
| -rw-r--r-- | src/libstore/build.cc | 38 | ||||
| -rw-r--r-- | src/libstore/store-api.hh | 2 | ||||
| -rw-r--r-- | src/nix-store/nix-store.cc | 1 |
3 files changed, 34 insertions, 7 deletions
diff --git a/src/libstore/build.cc b/src/libstore/build.cc index af068fc59ad1..9b9621dc19ea 100644 --- a/src/libstore/build.cc +++ b/src/libstore/build.cc @@ -1045,6 +1045,15 @@ void DerivationGoal::haveDerivation() for (auto & i : invalidOutputs) if (pathFailed(i)) return; + /* Reject doing a hash build of anything other than a fixed-output + derivation. */ + if (buildMode == bmHash) { + if (drv->outputs.size() != 1 || + drv->outputs.find("out") == drv->outputs.end() || + drv->outputs["out"].hashAlgo == "") + throw Error(format("cannot do a hash build of non-fixed-output derivation ‘%1%’") % drvPath); + } + /* We are first going to try to create the invalid output paths through substitutes. If that doesn't work, we'll build them. */ @@ -2727,12 +2736,29 @@ void DerivationGoal::registerOutputs() format("output path ‘%1%’ should be a non-executable regular file") % path); } - /* Check the hash. */ + /* Check the hash. In hash mode, move the path produced by + the derivation to its content-addressed location. */ Hash h2 = recursive ? hashPath(ht, actualPath).first : hashFile(ht, actualPath); - if (h != h2) - throw BuildError( - format("output path ‘%1%’ has %2% hash ‘%3%’ when ‘%4%’ was expected") - % path % i.second.hashAlgo % printHash16or32(h2) % printHash16or32(h)); + if (buildMode == bmHash) { + Path dest = makeFixedOutputPath(recursive, ht, h2, drv->env["name"]); + printMsg(lvlError, format("build produced path ‘%1%’ with %2% hash ‘%3%’") + % dest % printHashType(ht) % printHash16or32(h2)); + if (worker.store.isValidPath(dest)) + return; + if (actualPath != dest) { + PathLocks outputLocks({dest}); + if (pathExists(dest)) + deletePath(dest); + if (rename(actualPath.c_str(), dest.c_str()) == -1) + throw SysError(format("moving ‘%1%’ to ‘%2%’") % actualPath % dest); + } + path = actualPath = dest; + } else { + if (h != h2) + throw BuildError( + format("output path ‘%1%’ has %2% hash ‘%3%’ when ‘%4%’ was expected") + % path % i.second.hashAlgo % printHash16or32(h2) % printHash16or32(h)); + } } /* Get rid of all weird permissions. This also checks that @@ -2748,7 +2774,7 @@ void DerivationGoal::registerOutputs() PathSet references = scanForReferences(actualPath, allPaths, hash); if (buildMode == bmCheck) { - if (!store->isValidPath(path)) continue; + if (!worker.store.isValidPath(path)) continue; ValidPathInfo info = worker.store.queryPathInfo(path); if (hash.first != info.hash) { if (settings.keepFailed) { diff --git a/src/libstore/store-api.hh b/src/libstore/store-api.hh index 9cc5fd45b7c4..9fa137030e43 100644 --- a/src/libstore/store-api.hh +++ b/src/libstore/store-api.hh @@ -103,7 +103,7 @@ struct ValidPathInfo typedef list<ValidPathInfo> ValidPathInfos; -enum BuildMode { bmNormal, bmRepair, bmCheck }; +enum BuildMode { bmNormal, bmRepair, bmCheck, bmHash }; struct BuildResult diff --git a/src/nix-store/nix-store.cc b/src/nix-store/nix-store.cc index 22b3be27aa79..df6afd9791bf 100644 --- a/src/nix-store/nix-store.cc +++ b/src/nix-store/nix-store.cc @@ -117,6 +117,7 @@ static void opRealise(Strings opFlags, Strings opArgs) if (i == "--dry-run") dryRun = true; else if (i == "--repair") buildMode = bmRepair; else if (i == "--check") buildMode = bmCheck; + else if (i == "--hash") buildMode = bmHash; else if (i == "--ignore-unknown") ignoreUnknown = true; else throw UsageError(format("unknown flag ‘%1%’") % i); |