Bump to 2.0.0, Added nil return, added rockspec (#2)

* Added rockspec file
* Added rock build action
* Added explicit `nil` return
* Bumped to v2.0.0

.github/workflows/packaging.yml

@@ -25,7 +25,7 @@ jobs:
 
       - name: Preparing build directory
         run: |
-          mkdir -p build/lua/doc
+          mkdir -p build/lua/doc/../lua
 
       - name: Build LDoc documentation
         uses: lunarmodules/ldoc@v1.5.0
@@ -38,6 +38,7 @@ jobs:
           cp LICENSE build/LICENSE
           cp demo.lua build/demo.lua
           cp -R doc/ build/doc/
+          cp -R lua/ build/lua/
           cp LICENSE build/doc/topics/LICENSE
 
       - name: Upload artifact (socket.7z)

.github/workflows/rockspec.yml

@@ -0,0 +1,36 @@
+name: Build & Upload Rockspec
+
+on:
+  push:
+    branches: master
+  workflow_dispatch:
+
+concurrency:
+  group: rockspec-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    steps:
+      - name: Checkout Git submodules
+        uses: actions/checkout@v6
+        with:
+          submodules: true
+          fetch-depth: 0
+
+      - name: Install LuaRocks & build
+        run: |
+          sudo apt-get install -y luarocks
+          luarocks pack sleep-2.0.0-1.rockspec
+
+      - name: Upload rock artifact
+        uses: actions/upload-artifact@v4
+        if: ${{ github.ref == 'refs/heads/master' }}
+        with:
+          name: rockspec-artifact
+          path: "*.rock"
+          compression-level: 0
+          retention-days: 30