lessc: add wrapper for plugins

Co-authored-by: Sandro <[e-mail]>

pkgs/by-name/le/lessc/package.nix

···
   passthru = {
     updateScript = nix-update-script { };
     plugins = callPackage ./plugins { };
+    wrapper = callPackage ./wrapper { };
+    withPlugins = fn: lessc.wrapper.override { plugins = fn lessc.plugins; };
     tests = {
       version = testers.testVersion { package = lessc; };
 

pkgs/by-name/le/lessc/plugins/clean-css/default.nix

···
   testers,
   runCommand,
   writeText,
-  symlinkJoin,
   lessc,
 }:
 
···
         actual =
           runCommand "actual"
             {
-              nativeBuildInputs = [
-                (symlinkJoin {
-                  name = "less-css-with-plugins";
-                  paths = [
-                    lessc
-                    lessc.plugins.clean-css
-                  ];
-                })
-              ];
+              nativeBuildInputs = [ (lessc.withPlugins (p: [ p.clean-css ])) ];
               base = writeText "base" ''
                 @color: red;
                 body {
···
                   }
                 }
               '';
-              NODE_PATH = lib.concatMapStringsSep ":" (pkg: "${pkg}/lib/node_modules") [
-                lessc
-                lessc.plugins.clean-css
-              ];
             }
             ''
               lessc $base --clean-css="--s1 --advanced" > $out

pkgs/by-name/le/lessc/plugins/clean-css/update.sh

···
 NIXPKGS_DIR="$PWD"
 
 latest_commit="$(
-  curl https://api.github.com/repos/less/less-plugin-clean-css/branches/master \
+  curl -L -s ${GITHUB_TOKEN:+-u ":${GITHUB_TOKEN}"} https://api.github.com/repos/less/less-plugin-clean-css/branches/master \
   | jq -r .commit.sha
 )"
 

pkgs/by-name/le/lessc/wrapper/default.nix

···
+{
+  lib,
+  stdenv,
+  makeWrapper,
+  lessc,
+  plugins ? [ ],
+}:
+
+stdenv.mkDerivation {
+  pname = "lessc-with-plugins";
+  nativeBuildInputs = [ makeWrapper ];
+  buildPhase = ''
+    mkdir -p $out/bin
+
+    makeWrapper "${lib.getExe lessc}" "$out/bin/lessc" \
+      --prefix NODE_PATH : "${lib.makeSearchPath "/lib/node_modules" plugins}"
+  '';
+
+  doUnpack = false;
+
+  inherit (lessc)
+    version
+    src
+    passthru
+    meta
+    ;
+}