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* A command to query the paths referenced by an fstate expression.

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* Use a temporary directory for build actions.
This commit is contained in:
Eelco Dolstra 2003-07-08 13:22:08 +00:00
parent a279137327
commit 40274c1f4f
6 changed files with 198 additions and 97 deletions
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13
src/fstate.hh
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@ -60,9 +60,17 @@ typedef ATerm FState;
typedef ATerm Content;
/* Realise a $f$-normalised expression in the file system. */
/* Realise an fstate expression in the file system. This requires
execution of all Derive() nodes. */
FState realiseFState(FState fs);
/* Return the path of an fstate expression. An empty string is
returned if the term is not a valid fstate expression. (!!!) */
string fstatePath(FState fs);
/* Return the paths referenced by fstate expression. */
Strings fstateRefs(FState fs);
/* Return a canonical textual representation of an expression. */
string printTerm(ATerm t);
@ -73,6 +81,9 @@ Error badTerm(const format & f, ATerm t);
/* Hash an aterm. */
Hash hashTerm(ATerm t);
/* Read an aterm from disk, given its hash. */
ATerm termFromHash(const Hash & hash);
/* Write an aterm to the Nix store directory, and return its hash. */
Hash writeTerm(ATerm t);