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* Maintain a database table (`derivers') that maps output paths to the

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derivation that produced them.
* `nix-store -qd PATH' prints out the derivation that produced a path.
This commit is contained in:
Eelco Dolstra 2005-02-07 13:40:40 +00:00
parent a37338815d
commit 450c358e20
4 changed files with 74 additions and 13 deletions
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14
src/libstore/store.hh
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@ -57,7 +57,8 @@ void clearSubstitutes();
of the file system contents of the path. The hash must be a
SHA-256 hash. */
void registerValidPath(const Transaction & txn,
const Path & path, const Hash & hash, const PathSet & references);
const Path & path, const Hash & hash, const PathSet & references,
const Path & deriver);
/* Throw an exception if `path' is not directly in the Nix store. */
void assertStorePath(const Path & path);
@ -77,7 +78,8 @@ void canonicalisePathMetaData(const Path & path);
/* Checks whether a path is valid. */
bool isValidPath(const Path & path);
/* Sets the set of outgoing FS references for a store path. */
/* Sets the set of outgoing FS references for a store path. Use with
care! */
void setReferences(const Transaction & txn, const Path & storePath,
const PathSet & references);
@ -89,6 +91,14 @@ void queryReferences(const Path & storePath, PathSet & references);
result is not cleared. */
void queryReferers(const Path & storePath, PathSet & referers);
/* Sets the deriver of a store path. Use with care! */
void setDeriver(const Transaction & txn, const Path & storePath,
const Path & deriver);
/* Query the deriver of a store path. Return the empty string if no
deriver has been set. */
Path queryDeriver(const Transaction & txn, const Path & storePath);
/* Constructs a unique store path name. */
Path makeStorePath(const string & type,
const Hash & hash, const string & suffix);