diff options
Diffstat (limited to 'src/libstore')
| -rw-r--r-- | src/libstore/build.hh | 5 | ||||
| -rw-r--r-- | src/libstore/misc.cc | 9 |
2 files changed, 14 insertions, 0 deletions
diff --git a/src/libstore/build.hh b/src/libstore/build.hh index 2c6bcf9f2..45997ebb2 100644 --- a/src/libstore/build.hh +++ b/src/libstore/build.hh @@ -28,4 +28,9 @@ Derivation derivationFromPath(const Path & drvPath); void computeFSClosure(const Path & storePath, PathSet & paths, bool flipDirection = false); +/* Return the path corresponding to the output identifier `id' in the + given derivation. */ +Path findOutput(const Derivation & drv, string id); + + #endif /* !__BUILD_H */ diff --git a/src/libstore/misc.cc b/src/libstore/misc.cc index 5f20ee277..f3cc98bf4 100644 --- a/src/libstore/misc.cc +++ b/src/libstore/misc.cc @@ -27,3 +27,12 @@ void computeFSClosure(const Path & storePath, i != references.end(); ++i) computeFSClosure(*i, paths, flipDirection); } + + + Path findOutput(const Derivation & drv, string id) +{ + for (DerivationOutputs::const_iterator i = drv.outputs.begin(); + i != drv.outputs.end(); ++i) + if (i->first == id) return i->second.path; + throw Error(format("derivation has no output `%1%'") % id); +} |