[WIP] Rewrite action to be docker based without requiring compiled Node.js files

.dockerignore

@@ -0,0 +1,35 @@
+# Node modules
+node_modules/
+
+# Test files
+src/__tests__/
+*.test.ts
+vitest.config.ts
+
+# Build artifacts (will be generated during Docker build)
+dist/
+
+# Development files
+.eslintrc.js
+.prettierrc
+
+# Git
+.git/
+.github/
+
+# Documentation
+README.md
+LICENSE
+
+# Test/example data
+php-files/
+specifications/
+
+# IDE
+.vscode/
+.idea/
+
+# Misc
+*.log
+npm-debug.log*
+.DS_Store

.gitignore

@@ -6,6 +6,7 @@ yarn-error.log*
 
 # Build output
 build/
+dist/
 
 # Coverage reports
 coverage/

Dockerfile

@@ -0,0 +1,21 @@
+FROM node:24-alpine
+
+# Set working directory
+WORKDIR /action
+
+# Copy package files
+COPY package*.json ./
+COPY tsconfig.json ./
+
+# Install dependencies
+RUN npm install
+
+# Copy source code
+COPY src/ ./src/
+
+# Copy entrypoint script
+COPY entrypoint.sh /entrypoint.sh
+RUN chmod +x /entrypoint.sh
+
+# Set entrypoint
+ENTRYPOINT ["/entrypoint.sh"]

README.md

@@ -245,6 +245,27 @@ Note: pytest-cov generates Cobertura XML format, not PHPUnit XML. This action no
 
 Contributions are welcome! Please feel free to submit a Pull Request.
 
+### Development
+
+This action is Docker-based, which means:
+
+- The action runs inside a Docker container built from the `Dockerfile`
+- No pre-compiled JavaScript files (`dist/`) need to be committed to the repository
+- TypeScript code is executed directly at runtime using Node.js 24's native TypeScript support (no build step needed)
+- To test locally, you can build the Docker image with:
+  ```bash
+  docker build -t pr-test-coverage .
+  ```
+
+### Testing Changes
+
+When making changes to the action:
+
+1. Update the TypeScript source files in `src/`
+2. Test your changes using the PR check workflow or by building the Docker image locally
+3. No need to run `npm run build` - TypeScript runs directly with Node.js native support
+4. Commit only the source files, not the compiled `dist/` directory
+
 ## License
 
 This project is licensed under the MIT License - see the [LICENSE](LICENSE) file for details.

action.yml

@@ -49,5 +49,5 @@ outputs:
     description: 'Total number of lines in changed files'
 
 runs:
-  using: 'node20'
-  main: 'dist/index.js'
+  using: 'docker'
+  image: 'Dockerfile'