action.yml

name: "Web changes detector"
author: "Dmitry Vasiliev"
description: "Detect changes in web pages and notify via GitHub Actions"
branding:
  icon: "check-circle"
  color: "blue"

inputs:
  config:
    description: "Configuration for the web changes detector"
    required: true
  jobs:
    description: "List of jobs to run for web changes detection"
    required: true

runs:
  using: "composite"
  steps:
    - name: "Set up environment"
      shell: bash
      run: |
        echo "CONFIG_PATH=${{ github.workspace }}/config.yaml" >> $GITHUB_ENV
        echo "JOBS_PATH=${{ github.workspace }}/jobs.yaml" >> $GITHUB_ENV
        echo "SNAPSHOTS_DB=${{ github.workspace }}/snapshots.db" >> $GITHUB_ENV
        echo "HOOKS_PATH=${{ github.action_path }}/hooks.py" >> $GITHUB_ENV
        echo "WEBCHANGES_VERSION=3.30.0" >> $GITHUB_ENV
        echo "PYTHON_VERSION=3.10" >> $GITHUB_ENV
    - name: "Write configs to files"
      shell: bash
      run: |
        echo '${{ inputs.config }}' > $CONFIG_PATH
        echo '${{ inputs.jobs }}' > $JOBS_PATH
    - name: "Setup Python"
      uses: actions/setup-python@v5
      with:
        python-version: ${{ env.PYTHON_VERSION }}
        cache: "pip"
    - name: "Install webchanges package"
      shell: bash
      run: |
        pip install webchanges==${{ env.WEBCHANGES_VERSION }}
    - name: "Compute SHA-256 of configs input"
      shell: bash
      run: |
        # Compute the hash of the configs input and store it in an environment variable
        JOB_HASH=$(sha256sum ${{ env.JOBS_PATH }} | awk '{ print $1 }')
        
        # Compute cache key based on the hashes
        echo "CACHE_KEY=${{ runner.os }}-snapshots-${JOB_HASH}" >> $GITHUB_ENV
    - name: "Restore cache snapshots database"
      id: cache-db
      uses: actions/cache/restore@v4
      with:
        path: "${{ env.SNAPSHOTS_DB }}"
        key: "${{ env.CACHE_KEY }}"
    - name: "Check if snapshots database exists"
      shell: bash
      run: |
        if [ ! -f $SNAPSHOTS_DB ]; then
          echo "No snapshots database found, creating a new one."
        else
          echo "Snapshots database found, using existing one."
        fi
    - name: "Run web changes detection"
      shell: bash
      run: |
        webchanges --config ${{ env.CONFIG_PATH }} --jobs ${{ env.JOBS_PATH }} --hooks ${{ env.HOOKS_PATH }} --database ${{ env.SNAPSHOTS_DB }}
    - name: "Cache snapshots database"
      uses: actions/cache/save@v4
      with:
        path: "${{ env.SNAPSHOTS_DB }}"
        key: "${{ env.CACHE_KEY }}"