Implement a TTL on cached fetchurl/fetchTarball results

This is because we don't want to do HTTP requests on every evaluation,
even though we can prevent a full redownload via the cached ETag. The
default is one hour.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/libstore/globals.hh b/src/libstore/globals.hh
index 0230a540e6..0a1072e369 100644
--- a/src/libstore/globals.hh
+++ b/src/libstore/globals.hh
@@ -27,6 +27,8 @@ struct Settings {
 
     bool get(const string & name, bool def);
 
+    int get(const string & name, int def);
+
     void update();
 
     string pack();