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* Negative caching, i.e. caching of build failures. Disabled by

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default.  This is mostly useful for Hydra.
This commit is contained in:
Eelco Dolstra 2009-03-25 21:05:42 +00:00
parent 7024a1ef07
commit 92f525ecf4
7 changed files with 140 additions and 7 deletions
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22
src/libstore/local-store.cc
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@ -65,6 +65,7 @@ LocalStore::LocalStore()
createDirs(nixDBPath + "/info");
createDirs(nixDBPath + "/referrer");
createDirs(nixDBPath + "/failed");
int curSchema = getSchema();
if (curSchema > nixSchemaVersion)
@ -196,6 +197,13 @@ static Path referrersFileFor(const Path & path)
}
static Path failedFileFor(const Path & path)
{
string baseName = baseNameOf(path);
return (format("%1%/failed/%2%") % nixDBPath % baseName).str();
}
static Path tmpFileForAtomicUpdate(const Path & path)
{
return (format("%1%/.%2%.%3%") % dirOf(path) % getpid() % baseNameOf(path)).str();
@ -335,6 +343,20 @@ void LocalStore::registerValidPath(const ValidPathInfo & info, bool ignoreValidi
}
void LocalStore::registerFailedPath(const Path & path)
{
/* Write an empty file in the .../failed directory to denote the
failure of the builder for `path'. */
writeFile(failedFileFor(path), "");
}
bool LocalStore::hasPathFailed(const Path & path)
{
return pathExists(failedFileFor(path));
}
Hash parseHashField(const Path & path, const string & s)
{
string::size_type colon = s.find(':');