50 lines
1.3 KiB
Nix
50 lines
1.3 KiB
Nix
{ lib, stdenv }:
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# A special kind of derivation that is only meant to be consumed by the
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# nix-shell.
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{
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# a list of packages to add to the shell environment
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packages ? [ ]
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, # propagate all the inputs from the given derivations
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inputsFrom ? [ ]
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, buildInputs ? [ ]
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, nativeBuildInputs ? [ ]
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, propagatedBuildInputs ? [ ]
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, propagatedNativeBuildInputs ? [ ]
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, ...
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}@attrs:
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let
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mergeInputs = name:
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(attrs.${name} or []) ++
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(lib.subtractLists inputsFrom (lib.flatten (lib.catAttrs name inputsFrom)));
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rest = builtins.removeAttrs attrs [
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"packages"
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"inputsFrom"
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"buildInputs"
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"nativeBuildInputs"
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"propagatedBuildInputs"
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"propagatedNativeBuildInputs"
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"shellHook"
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];
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in
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stdenv.mkDerivation ({
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name = "nix-shell";
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phases = [ "nobuildPhase" ];
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buildInputs = mergeInputs "buildInputs";
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nativeBuildInputs = packages ++ (mergeInputs "nativeBuildInputs");
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propagatedBuildInputs = mergeInputs "propagatedBuildInputs";
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propagatedNativeBuildInputs = mergeInputs "propagatedNativeBuildInputs";
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shellHook = lib.concatStringsSep "\n" (lib.catAttrs "shellHook"
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(lib.reverseList inputsFrom ++ [ attrs ]));
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nobuildPhase = ''
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echo
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echo "This derivation is not meant to be built, aborting";
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echo
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exit 1
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'';
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} // rest)
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