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authorEelco Dolstra <eelco.dolstra@logicblox.com>2012-10-02T21·13-0400
committerEelco Dolstra <eelco.dolstra@logicblox.com>2012-10-02T21·13-0400
commit2001895f3d2668549feb60a182aa624a7b6292eb (patch)
treef555841859d53cf821bf52dc89bd4d0fe9273186 /src/libstore/local-store.cc
parentcf46f194445c9abc0398dae908295dff794fee98 (diff)
Add a --repair flag to ‘nix-store -r’ to repair derivation outputs
With this flag, if any valid derivation output is missing or corrupt,
it will be recreated by using a substitute if available, or by
rebuilding the derivation.  The latter may use hash rewriting if
chroots are not available.
Diffstat (limited to 'src/libstore/local-store.cc')
-rw-r--r--src/libstore/local-store.cc10
1 files changed, 10 insertions, 0 deletions
diff --git a/src/libstore/local-store.cc b/src/libstore/local-store.cc
index e038cd4b29d3..a4ad97331ad3 100644
--- a/src/libstore/local-store.cc
+++ b/src/libstore/local-store.cc
@@ -1671,6 +1671,16 @@ void LocalStore::verifyPath(const Path & path, const PathSet & store,
 }
 
 
+bool LocalStore::pathContentsGood(const Path & path)
+{
+    ValidPathInfo info = queryPathInfo(path);
+    if (!pathExists(path)) return false;
+    HashResult current = hashPath(info.hash.type, path);
+    Hash nullHash(htSHA256);
+    return info.hash == nullHash || info.hash == current.first;
+}
+
+
 /* Functions for upgrading from the pre-SQLite database. */
 
 PathSet LocalStore::queryValidPathsOld()