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* More operations.

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* addToStore() and friends: don't do a round-trip to the worker if
  we're only interested in the path (i.e., in read-only mode).
This commit is contained in:
Eelco Dolstra 2006-12-01 18:00:01 +00:00
parent 0565b5f2b3
commit b0d8e05be1
5 changed files with 116 additions and 33 deletions
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30
src/libstore/store-api.hh
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@ -54,12 +54,12 @@ public:
/* Queries the set of outgoing FS references for a store path.
The result is not cleared. */
virtual void queryReferences(const Path & storePath,
virtual void queryReferences(const Path & path,
PathSet & references) = 0;
/* Queries the set of incoming FS references for a store path.
The result is not cleared. */
virtual void queryReferrers(const Path & storePath,
virtual void queryReferrers(const Path & path,
PathSet & referrers) = 0;
/* Copy the contents of a path to the store and register the
@ -88,7 +88,7 @@ public:
/* Ensure that a path is valid. If it is not currently valid, it
may be made valid by running a substitute (if defined for the
path). */
virtual void ensurePath(const Path & storePath) = 0;
virtual void ensurePath(const Path & path) = 0;
};
@ -115,6 +115,30 @@ Path makeFixedOutputPath(bool recursive,
string hashAlgo, Hash hash, string name);
/* This is the preparatory part of addToStore() and addToStoreFixed();
it computes the store path to which srcPath is to be copied.
Returns the store path and the cryptographic hash of the
contents of srcPath. */
std::pair<Path, Hash> computeStorePathForPath(bool fixed, bool recursive,
string hashAlgo, const Path & srcPath);
/* Preparatory part of addTextToStore().
!!! Computation of the path should take the references given to
addTextToStore() into account, otherwise we have a (relatively
minor) security hole: a caller can register a source file with
bogus references. If there are too many references, the path may
not be garbage collected when it has to be (not really a problem,
the caller could create a root anyway), or it may be garbage
collected when it shouldn't be (more serious).
Hashing the references would solve this (bogus references would
simply yield a different store path, so other users wouldn't be
affected), but it has some backwards compatibility issues (the
hashing scheme changes), so I'm not doing that for now. */
Path computeStorePathForText(const string & suffix, const string & s);
/* For now, there is a single global store API object, but we'll
purify that in the future. */
extern boost::shared_ptr<StoreAPI> store;