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Merge pull request #170048 from lovesegfault/link-farm-passthru

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linkFarm: add entries to passthru
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Robert Hensing 2022-11-15 17:39:43 +01:00 committed by GitHub
commit 449ae7573b
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1 changed files with 26 additions and 10 deletions
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36
pkgs/build-support/trivial-builders.nix
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@ -465,8 +465,11 @@ rec {
*
* This creates a simple derivation with symlinks to all inputs.
*
* entries is a list of attribute sets like
* { name = "name" ; path = "/nix/store/..."; }
* entries can be a list of attribute sets like
* [ { name = "name" ; path = "/nix/store/..."; } ]
*
* or an attribute set name -> path like:
* { name = "/nix/store/..."; other = "/nix/store/..."; }
*
* Example:
*
@ -482,14 +485,27 @@ rec {
*
* See the note on symlinkJoin for the difference between linkFarm and symlinkJoin.
*/
linkFarm = name: entries: runCommand name { preferLocalBuild = true; allowSubstitutes = false; }
''mkdir -p $out
cd $out
${lib.concatMapStrings (x: ''
mkdir -p "$(dirname ${lib.escapeShellArg x.name})"
ln -s ${lib.escapeShellArg "${x.path}"} ${lib.escapeShellArg x.name}
'') entries}
'';
linkFarm = name: entries:
let
entries' =
if (lib.isAttrs entries) then entries
else if (lib.isList entries) then lib.listToAttrs (map (x: lib.nameValuePair x.name x.path) entries)
else throw "linkFarm entries must be either attrs or a list!";
linkCommands = lib.mapAttrsToList (name: path: ''
mkdir -p "$(dirname ${lib.escapeShellArg "${name}"})"
ln -s ${lib.escapeShellArg "${path}"} ${lib.escapeShellArg "${name}"}
'') entries';
in
runCommand name {
preferLocalBuild = true;
allowSubstitutes = false;
passthru.entries = entries';
} ''
mkdir -p $out
cd $out
${lib.concatStrings linkCommands}
'';
/*
* Easily create a linkFarm from a set of derivations.