mpvScripts: refactor around `buildLua` helper

pkgs/applications/video/mpv/scripts/acompressor.nix

···
-{ stdenvNoCC
+{ lib
+, buildLua
 , mpv-unwrapped
-, lib
 }:
 
-stdenvNoCC.mkDerivation rec {
+buildLua {
+  inherit (mpv-unwrapped) src version;
   pname = "mpv-acompressor";
-  version = mpv-unwrapped.version;
-
-  src = "${mpv-unwrapped.src.outPath}/TOOLS/lua/acompressor.lua";
-
-  dontBuild = true;
-  dontUnpack = true;
-
-  installPhase = ''
-    install -Dm644 ${src} $out/share/mpv/scripts/acompressor.lua
-  '';
-
-  passthru.scriptName = "acompressor.lua";
+  scriptPath = "TOOLS/lua/acompressor.lua";
 
   meta = with lib; {
+    inherit (mpv-unwrapped.meta) license;
     description = "Script to toggle and control ffmpeg's dynamic range compression filter.";
     homepage = "https://github.com/mpv-player/mpv/blob/master/TOOLS/lua/acompressor.lua";
-    license = licenses.gpl2Plus;
     maintainers = with maintainers; [ nicoo ];
   };
 }

pkgs/applications/video/mpv/scripts/buildLua.nix

···
+{ lib
+, stdenvNoCC }:
+
+let fileName = pathStr: lib.last (lib.splitString "/" pathStr);
+in
+lib.makeOverridable (
+  { pname, scriptPath ? "${pname}.lua", ... }@args:
+  stdenvNoCC.mkDerivation (lib.attrsets.recursiveUpdate {
+    dontBuild = true;
+    preferLocalBuild = true;
+
+    outputHashMode = "recursive";
+    installPhase = "install -m644 -Dt $out/share/mpv/scripts ${scriptPath}";
+    passthru.scriptName = fileName scriptPath;
+
+    meta.platforms = lib.platforms.all;
+  } args)
+)

pkgs/applications/video/mpv/scripts/chapterskip.nix

···
 { lib
 , fetchFromGitHub
-, nix-update-script
-, stdenvNoCC }:
+, buildLua }:
 
-stdenvNoCC.mkDerivation {
+buildLua {
   pname = "chapterskip";
-  passthru.scriptName = "chapterskip.lua";
 
   version = "unstable-2022-09-08";
   src = fetchFromGitHub {
···
     hash  = "sha256-OTrLQE3rYvPQamEX23D6HttNjx3vafWdTMxTiWpDy90=";
   };
 
-  dontBuild = true;
-  preferLocalBuild = true;
-  installPhase = "install -Dt $out/share/mpv/scripts chapterskip.lua";
-
-  passthru.updateScript = nix-update-script {
-    extraArgs = [ "--version=branch" ];
-  };
-
-  meta = with lib; {
+  meta = {
     homepage = "https://github.com/po5/chapterskip";
-    platforms = platforms.all;
-    maintainers = with maintainers; [ nicoo ];
+    maintainers = with lib.maintainers; [ nicoo ];
   };
 }

pkgs/applications/video/mpv/scripts/default.nix

···
 , config
 }:
 
-lib.recurseIntoAttrs
+let buildLua = callPackage ./buildLua.nix { };
+in lib.recurseIntoAttrs
   ({
-    acompressor = callPackage ./acompressor.nix { };
+    acompressor = callPackage ./acompressor.nix { inherit buildLua; };
     autocrop = callPackage ./autocrop.nix { };
     autodeint = callPackage ./autodeint.nix { };
     autoload = callPackage ./autoload.nix { };
-    chapterskip = callPackage ./chapterskip.nix { };
+    chapterskip = callPackage ./chapterskip.nix { inherit buildLua; };
     convert = callPackage ./convert.nix { };
     inhibit-gnome = callPackage ./inhibit-gnome.nix { };
     mpris = callPackage ./mpris.nix { };
···
     webtorrent-mpv-hook = callPackage ./webtorrent-mpv-hook.nix { };
     cutter = callPackage ./cutter.nix { };
   }
-  // (callPackage ./occivink.nix { }))
+  // (callPackage ./occivink.nix { inherit buildLua; }))
   // lib.optionalAttrs config.allowAliases {
   youtube-quality = throw "'youtube-quality' is no longer maintained, use 'quality-menu' instead"; # added 2023-07-14
 }

pkgs/applications/video/mpv/scripts/occivink.nix

···
 { lib
-, stdenvNoCC
 , fetchFromGitHub
+, buildLua
 }:
 
 let
-  script = { n, ... }@p:
-    stdenvNoCC.mkDerivation (lib.attrsets.recursiveUpdate {
-      pname = "mpv_${n}";
-      passthru.scriptName = "${n}.lua";
-
+  script = { pname, ...}@args:
+    buildLua (lib.attrsets.recursiveUpdate {
       src = fetchFromGitHub {
         owner = "occivink";
         repo = "mpv-scripts";
···
       };
       version = "unstable-2022-10-02";
 
-      dontBuild = true;
-      installPhase = ''
-        mkdir -p $out/share/mpv/scripts
-        cp -r scripts/${n}.lua $out/share/mpv/scripts/
-      '';
+      scriptPath = "scripts/${pname}.lua";
 
       meta = with lib; {
         homepage = "https://github.com/occivink/mpv-scripts";
         license = licenses.unlicense;
-        platforms = platforms.all;
         maintainers = with maintainers; [ nicoo ];
       };
-
-      outputHashAlgo = "sha256";
-      outputHashMode = "recursive";
-    } p);
+    } args);
 
 in
 {
 
   # Usage: `pkgs.mpv.override { scripts = [ pkgs.mpvScripts.seekTo ]; }`
   seekTo = script {
-    n = "seek-to";
+    pname = "seek-to";
     meta.description = "Mpv script for seeking to a specific position";
     outputHash = "sha256-3RlbtUivmeoR9TZ6rABiZSd5jd2lFv/8p/4irHMLshs=";
   };
 
   blacklistExtensions = script {
-    n = "blacklist-extensions";
+    pname = "blacklist-extensions";
     meta.description = "Automatically remove playlist entries based on their extension.";
     outputHash = "sha256-qw9lz8ofmvvh23F9aWLxiU4YofY+YflRETu+nxMhvVE=";
   };
-
 }