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5170c5691a
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.
34 lines
768 B
Nix
34 lines
768 B
Nix
with import <nix/config.nix>;
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let
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builder = builtins.toFile "unpack-channel.sh"
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''
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mkdir $out
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cd $out
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${bzip2} -d < $src | ${tar} xf - --warning=no-timestamp
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mv * $out/$channelName
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if [ -n "$binaryCacheURL" ]; then
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mkdir $out/binary-caches
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echo -n "$binaryCacheURL" > $out/binary-caches/$channelName
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fi
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'';
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in
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{ name, channelName, src, binaryCacheURL ? "" }:
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derivation {
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system = builtins.currentSystem;
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builder = shell;
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args = [ "-e" builder ];
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inherit name channelName src binaryCacheURL;
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PATH = "${nixBinDir}:${coreutils}";
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# No point in doing this remotely.
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preferLocalBuild = true;
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# Don't build in a chroot because Nix's dependencies may not be there.
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__noChroot = true;
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}
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