103 lines
2.8 KiB
Nix
103 lines
2.8 KiB
Nix
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# buildEnv creates a tree of symlinks to the specified paths. This is
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# a fork of the hardcoded buildEnv in the Nix distribution.
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{
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buildPackages,
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runCommand,
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lib,
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substituteAll,
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}:
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let
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builder = substituteAll {
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src = ./builder.pl;
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inherit (builtins) storeDir;
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};
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in
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lib.makeOverridable (
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{
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name,
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# The manifest file (if any). A symlink $out/manifest will be
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# created to it.
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manifest ? "",
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# The paths to symlink.
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paths,
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# Whether to ignore collisions or abort.
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ignoreCollisions ? false,
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# If there is a collision, check whether the contents and permissions match
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# and only if not, throw a collision error.
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checkCollisionContents ? true,
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# The paths (relative to each element of `paths') that we want to
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# symlink (e.g., ["/bin"]). Any file not inside any of the
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# directories in the list is not symlinked.
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pathsToLink ? [ "/" ],
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# The package outputs to include. By default, only the default
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# output is included.
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extraOutputsToInstall ? [ ],
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# Root the result in directory "$out${extraPrefix}", e.g. "/share".
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extraPrefix ? "",
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# Shell commands to run after building the symlink tree.
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postBuild ? "",
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# Additional inputs
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nativeBuildInputs ? [ ], # Handy e.g. if using makeWrapper in `postBuild`.
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buildInputs ? [ ],
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passthru ? { },
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meta ? { },
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}:
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runCommand name
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rec {
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inherit
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manifest
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ignoreCollisions
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checkCollisionContents
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passthru
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meta
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pathsToLink
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extraPrefix
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postBuild
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nativeBuildInputs
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buildInputs
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;
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pkgs = builtins.toJSON (
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map (drv: {
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paths =
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# First add the usual output(s): respect if user has chosen explicitly,
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# and otherwise use `meta.outputsToInstall`. The attribute is guaranteed
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# to exist in mkDerivation-created cases. The other cases (e.g. runCommand)
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# aren't expected to have multiple outputs.
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(
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if
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(!drv ? outputSpecified || !drv.outputSpecified) && drv.meta.outputsToInstall or null != null
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then
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map (outName: drv.${outName}) drv.meta.outputsToInstall
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else
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[ drv ]
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)
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# Add any extra outputs specified by the caller of `buildEnv`.
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++ lib.filter (p: p != null) (builtins.map (outName: drv.${outName} or null) extraOutputsToInstall);
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priority = drv.meta.priority or 5;
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}) paths
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);
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preferLocalBuild = true;
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allowSubstitutes = false;
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# XXX: The size is somewhat arbitrary
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passAsFile = if builtins.stringLength pkgs >= 128 * 1024 then [ "pkgs" ] else [ ];
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}
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''
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${buildPackages.perl}/bin/perl -w ${builder}
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eval "$postBuild"
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''
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)
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