wroclaw-git-backups/nix
1
0
Fork 0
mirror of https://github.com/NixOS/nix synced 2025-07-07 01:51:47 +02:00
Code Activity

Allow a binary cache to declare that it doesn't support "nix-env -qas"

Browse source 
Querying all substitutable paths via "nix-env -qas" is potentially
hard on a server, since it involves sending thousands of HEAD
requests.  So a binary cache must now have a meta-info file named
"nix-cache-info" that specifies whether the server wants this.  It
also specifies the store prefix so that we don't send useless queries
to a binary cache for a different store prefix.
This commit is contained in:
Eelco Dolstra 2012-07-27 18:16:05 -04:00
parent 6ecf4f13f6
commit 66a3ac6a56
3 changed files with 135 additions and 86 deletions
Download patch file Download diff file Expand all files Collapse all files

15
tests/binary-cache.sh
View file

@ -10,13 +10,26 @@ outPath=$(nix-build dependencies.nix --no-out-link)
nix-push --dest $cacheDir $outPath
# Check that downloading works.
# By default, a binary cache doesn't support "nix-env -qas", but does
# support installation.
clearStore
rm -f $NIX_STATE_DIR/binary-cache*
NIX_BINARY_CACHES="file://$cacheDir" nix-env -f dependencies.nix -qas \* | grep -- "---"
NIX_BINARY_CACHES="file://$cacheDir" nix-store -r $outPath
# But with the right configuration, "nix-env -qas" should also work.
clearStore
rm -f $NIX_STATE_DIR/binary-cache*
echo "WantMassQuery: 1" >> $cacheDir/nix-cache-info
NIX_BINARY_CACHES="file://$cacheDir" nix-env -f dependencies.nix -qas \* | grep -- "--S"
NIX_BINARY_CACHES="file://$cacheDir" nix-store -r $outPath
nix-store --check-validity $outPath
nix-store -qR $outPath | grep input-2