mpv: add test "mpv-scripts-should-not-collide"

# Arguments that this derivation gets when it is created with `callPackage`

{ stdenv

, buildEnv

, lib

, makeWrapper

, mpvScripts

, symlinkJoin

, writeTextDir

, yt-dlp

}:

      passthru.unwrapped = mpv;

      passthru.tests.mpv-scripts-should-not-collide = buildEnv {

        name = "mpv-scripts-env";

        paths = lib.pipe mpvScripts [

          # filters "override" "overrideDerivation" "recurseForDerivations"

          (lib.filterAttrs (key: script: lib.isDerivation script))

          # replaces unfree and meta.broken scripts with decent placeholders

          (lib.mapAttrsToList (key: script:

            if (builtins.tryEval script.outPath).success

            then script

            else writeTextDir "share/mpv/scripts/${script.scriptName}" "placeholder of ${script.name}"

          ))

        ];

      };

      postBuild = ''

        # wrapProgram can't operate on symlinks

        rm "$out/bin/mpv"