nixpkgs/pkgs/build-support/mkshell/default.nix

51 lines
1.3 KiB
Nix
Raw Normal View History

2017-12-20 23:42:07 +00:00
{ lib, stdenv }:
# A special kind of derivation that is only meant to be consumed by the
# nix-shell.
{
# a list of packages to add to the shell environment
packages ? [ ]
, # propagate all the inputs from the given derivations
inputsFrom ? [ ]
, buildInputs ? [ ]
, nativeBuildInputs ? [ ]
, propagatedBuildInputs ? [ ]
, propagatedNativeBuildInputs ? [ ]
, ...
2017-12-20 23:42:07 +00:00
}@attrs:
let
mergeInputs = name:
(attrs.${name} or []) ++
(lib.subtractLists inputsFrom (lib.flatten (lib.catAttrs name inputsFrom)));
2017-12-20 23:42:07 +00:00
rest = builtins.removeAttrs attrs [
"packages"
2017-12-20 23:42:07 +00:00
"inputsFrom"
"buildInputs"
"nativeBuildInputs"
"propagatedBuildInputs"
"propagatedNativeBuildInputs"
"shellHook"
2017-12-20 23:42:07 +00:00
];
in
stdenv.mkDerivation ({
name = "nix-shell";
phases = [ "nobuildPhase" ];
2017-12-20 23:42:07 +00:00
buildInputs = mergeInputs "buildInputs";
nativeBuildInputs = packages ++ (mergeInputs "nativeBuildInputs");
2017-12-20 23:42:07 +00:00
propagatedBuildInputs = mergeInputs "propagatedBuildInputs";
propagatedNativeBuildInputs = mergeInputs "propagatedNativeBuildInputs";
shellHook = lib.concatStringsSep "\n" (lib.catAttrs "shellHook"
(lib.reverseList inputsFrom ++ [ attrs ]));
2017-12-20 23:42:07 +00:00
nobuildPhase = ''
echo
echo "This derivation is not meant to be built, aborting";
echo
exit 1
'';
} // rest)