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#include "build.hh"
Derivation derivationFromPath(const Path & drvPath)
{
assertStorePath(drvPath);
ensurePath(drvPath);
ATerm t = ATreadFromNamedFile(drvPath.c_str());
if (!t) throw Error(format("cannot read aterm from `%1%'") % drvPath);
return parseDerivation(t);
}
void computeFSClosure(const Path & storePath,
PathSet & paths, bool flipDirection)
{
if (paths.find(storePath) != paths.end()) return;
paths.insert(storePath);
PathSet references;
if (flipDirection)
queryReferers(storePath, references);
else
queryReferences(storePath, references);
for (PathSet::iterator i = references.begin();
i != references.end(); ++i)
computeFSClosure(*i, paths, flipDirection);
}
void storePathRequisites(const Path & storePath,
bool includeOutputs, PathSet & paths)
{
checkInterrupt();
if (paths.find(storePath) != paths.end()) return;
if (isDerivation(storePath)) {
paths.insert(storePath);
Derivation drv = derivationFromPath(storePath);
for (DerivationInputs::iterator i = drv.inputDrvs.begin();
i != drv.inputDrvs.end(); ++i)
/* !!! Maybe this is too strict, since it will include
*all* output paths of the input derivation, not just
the ones needed by this derivation. */
storePathRequisites(i->first, includeOutputs, paths);
for (PathSet::iterator i = drv.inputSrcs.begin();
i != drv.inputSrcs.end(); ++i)
storePathRequisites(*i, includeOutputs, paths);
if (includeOutputs) {
for (DerivationOutputs::iterator i = drv.outputs.begin();
i != drv.outputs.end(); ++i)
if (isValidPath(i->second.path))
storePathRequisites(i->second.path, includeOutputs, paths);
}
}
else {
computeFSClosure(storePath, paths);
}
}
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