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authorEelco Dolstra <e.dolstra@tudelft.nl>2009-03-25T21·05+0000
committerEelco Dolstra <e.dolstra@tudelft.nl>2009-03-25T21·05+0000
commit92f525ecf4ea8a9bd356acd1d3845074b1e5b918 (patch)
tree6d022fbd92897ad965a04571b339bad362cb9158 /nix.conf.example
parent7024a1ef076cedf4596c9f4b107e85d315242cea (diff)
* Negative caching, i.e. caching of build failures. Disabled by
  default.  This is mostly useful for Hydra.

Diffstat (limited to 'nix.conf.example')
-rw-r--r--nix.conf.example16
1 files changed, 16 insertions, 0 deletions
diff --git a/nix.conf.example b/nix.conf.example
index e7f8adcab631..5b6d5b87fe9d 100644
--- a/nix.conf.example
+++ b/nix.conf.example
@@ -154,6 +154,22 @@
 #build-chroot-dirs = /dev /dev/pts /proc
 
 
+### Option `build-cache-failure'
+#
+# If this option is enabled, Nix will do negative caching; that is, it
+# will remember failed builds, and won't attempt to try to build them
+# again if you ask for it.  Negative caching is disabled by default
+# because Nix cannot distinguish between permanent build errors (e.g.,
+# a syntax error in a source file) and transient build errors (e.g., a
+# full disk), as they both cause the builder to return a non-zero exit
+# code.  You can clear the cache by doing `rm -f
+# /nix/var/nix/db/failed/*'.
+#
+# Example:
+#   build-cache-failure = true
+#build-cache-failure = false
+
+
 ### Option `system'
 #
 # This option specifies the canonical Nix system name of the current