Update Luacheck workflow for Lua files

Author: haithium

.github/workflows/laucheck.yml

@@ -5,10 +5,42 @@ on:
     branches:
       - main
     paths:
+      - ".github/workflows/luacheck.yml"
       - "**/*.lua"
+  pull_request:
+    paths:
       - ".github/workflows/luacheck.yml"
+      - "**/*.lua"
   workflow_dispatch:
 
 jobs:
   luacheck:
-    uses: BlueLua/bluelua.github.io/.github/workflows/luacheck.yml@main
+    name: Luacheck
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+
+      - name: Setup LuaJIT
+        uses: leafo/gh-actions-lua@v13
+        with:
+          luaVersion: luajit
+
+      - name: Setup LuaRocks
+        uses: leafo/gh-actions-luarocks@v6
+
+      - name: Install Luacheck
+        run: luarocks install luacheck
+
+      - name: Resolve paths
+        id: paths
+        run: |
+          if [ -d src ]; then
+            echo "paths=src" >> "$GITHUB_OUTPUT"
+          else
+            echo "paths=lua" >> "$GITHUB_OUTPUT"
+          fi
+
+      - name: Run Luacheck
+        run: luacheck ${{ steps.paths.outputs.paths }}