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nix-channel: Use binary caches advertised by channels

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Channels can now advertise a binary cache by creating a file
<channel-url>/binary-cache-url.  The channel unpacker puts these in
its "binary-caches" subdirectory.  Thus, the URLS of the binary caches
for the channels added by root appear in
/nix/var/nix/profiles/per-user/eelco/channels/binary-caches/*.  The
binary cache substituter reads these and adds them to the list of
binary caches.
This commit is contained in:
Eelco Dolstra 2012-08-01 17:56:11 -04:00
parent 79bba3782c
commit 5170c5691a
4 changed files with 49 additions and 20 deletions
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10
corepkgs/unpack-channel.nix
View file

@ -6,19 +6,23 @@ let
''
mkdir $out
cd $out
${bzip2} -d < $src | ${tar} xf - --warning=no-timestamp
${bzip2} -d < $src | ${tar} xf - --warning=no-timestamp
mv * $out/$channelName
if [ -n "$binaryCacheURL" ]; then
mkdir $out/binary-caches
echo -n "$binaryCacheURL" > $out/binary-caches/$channelName
fi
'';
in
{ name, channelName, src }:
{ name, channelName, src, binaryCacheURL ? "" }:
derivation {
system = builtins.currentSystem;
builder = shell;
args = [ "-e" builder ];
inherit name channelName src;
inherit name channelName src binaryCacheURL;
PATH = "${nixBinDir}:${coreutils}";