check-changes-to-env.yml

name: Check Changes to Env
on:
  pull_request:
    types: [opened, synchronize]
    paths: 
    - .env.example
jobs:
  check:
    name: Check Changes to Env
    runs-on: ubuntu-latest
    steps:
    - name: Get PR Number
      id: get-pr-number
      run: |
        PR_NUMBER=$(echo "${{ github.ref }}" | awk 'BEGIN { FS = "/" } ; { print $3 }')
        echo "pr-number=${PR_NUMBER}" >> $GITHUB_OUTPUT
    - name: Comment when dummy.txt changes
      uses: actions/github-script@v7
      with:
        script: |
          const filename = ".env.example"
          const filenameSha256 = await sha256(filename)
          const diffURL = "https://github.com/${{ github.repository }}/pull/${{ steps.get-pr-number.outputs.pr-number }}/files#diff-" + filenameSha256
          const docsURL = "https://github.com/${{ github.repository }}/wiki/Setting-Environment-Variables"
          const commentBody = `⚠️ It looks like [${filename}](${diffURL}) has changed. Remember to update the [Setting Environment Variables](${docsURL}) article accordingly.`
          const listComments = await github.rest.issues.listComments({
            ...context.repo,
            issue_number: context.issue.number
          })
          const commentExists = listComments.data.some(comment => comment.body === commentBody)
          if (!commentExists) {
            await github.rest.issues.createComment({
              ...context.repo,
              issue_number: context.issue.number,
              body: commentBody
            })
          }

          async function sha256(message) {
            const msgBuffer = new TextEncoder().encode(message)
            const hashBuffer = await crypto.subtle.digest("SHA-256", msgBuffer)
            const hashArray = Array.from(new Uint8Array(hashBuffer))
            return hashArray.map(b => b.toString(16).padStart(2, "0")).join("")
          }