Create workflow for linting and unit test execution

Author: vwout

.docker/alpine/Dockerfile

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+FROM alpine:3.19
+
+ARG LUA_VERSION=5.2
+ARG LUA_MODULES="luaffi lunit luacheck luacov luacov-html"
+ARG LUA_ROCKS_SERVER="https://luarocks.org/dev"
+
+RUN apk add --no-cache \
+        bash \
+        luajit \
+        lua${LUA_VERSION} \
+        lua${LUA_VERSION}-bit32 \
+    \
+    && apk add --no-cache --virtual .build-deps \
+        build-base \
+        git \
+        openssl-dev \
+        lua${LUA_VERSION}-dev \
+        luarocks${LUA_VERSION} \
+    \
+    && ln -s /usr/bin/lua${LUA_VERSION} /usr/local/bin/lua \
+    \
+    && for rock in ${LUA_MODULES}; do \
+        luarocks-${LUA_VERSION} install --server=${LUA_ROCKS_SERVER} ${rock}; \
+       done \
+    \
+    && apk del .build-deps
+
+ADD https://github.com/philips/lualint/raw/master/lualint /bin/lualint
+RUN chmod +x /bin/lualint \
+    && \
+    ln -s /usr/bin/luac${LUA_VERSION} /usr/bin/luac \
+    && \
+    ln -s /usr/local/share/lua/5.2 /usr/local/share/lua/5.1
+
+RUN mkdir -p /github/workspace
+VOLUME ["/github/workspace"]
+
+WORKDIR "/github/workspace"

.github/workflows/test.yaml

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+name: Linting and Tests
+
+on: [push, pull_request]
+
+jobs:
+  check:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Check out the repo
+      uses: actions/checkout@v4
+
+    - name: Build the Docker image
+      run: docker build .docker/alpine/ --tag ${{ github.repository }}-test:lua-5.2
+
+    - name: Run linter
+      uses: addnab/docker-run-action@v3
+      with:
+        image: ${{ github.repository }}-test:lua-5.2
+        options: -v ${{ github.workspace }}:/github/workspace
+        run: |
+            echo "Static luacheck ljsocket.lua"
+            luacheck --config .luacheckrc \
+              ljsocket.lua
+            echo "Linting ljsocket.lua"
+            lualint -s ljsocket.lua
+
+    - name: Bytecode verification
+      uses: addnab/docker-run-action@v3
+      with:
+        image: ${{ github.repository }}-test:lua-5.2
+        options: -v ${{ github.workspace }}:/github/workspace
+        run: |
+          echo "Checking JIT bytecode for ljsocket.lua"
+          luajit -bl ljsocket.lua /dev/null
+          echo "Checking bytecode for ljsocket.lua"
+          luac -p ljsocket.lua
+
+    - name: Run unit tests
+      uses: addnab/docker-run-action@v3
+      with:
+        image: ${{ github.repository }}-test:lua-5.2
+        options: -v ${{ github.workspace }}:/github/workspace
+        run: |
+            lunit -i `which luajit` $(find test -name "*_test.lua")
+            luacov ljsocket.lua

.gitignore

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+/.idea
+/luacov.report.out
+/luacov.stats.out

.luacheckrc

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+-- Only allow symbols available in all Lua versions
+std = "min"
+
+-- Get rid of "unused argument self"-warnings
+self = false
+
+-- Include standard globals
+globals = {
+    "bit",
+    "unpack",
+    "jit"
+}
+
+-- Ignure unused arguments
+unused_args = false
+
+-- Ignore too long lines
+max_line_length = false