go-version-notification.yaml

name: Go Version Change Notification

on:
  push:
    branches:
      - master
    paths:
      - 'go.mod'

jobs:
  check-go-version:
    name: Check Go version change and notify
    runs-on: ubuntu-22.04
    steps:
      - name: Check-out code
        uses: actions/checkout@v6
        with:
          fetch-depth: 2

      - name: Extract Go versions
        id: versions
        run: |
          CURRENT=$(awk '/^go [0-9]/ { print $2; exit }' go.mod)
          PREVIOUS=$(git show HEAD~1:go.mod | awk '/^go [0-9]/ { print $2; exit }')

          echo "current=$CURRENT" >> "$GITHUB_OUTPUT"
          echo "previous=$PREVIOUS" >> "$GITHUB_OUTPUT"

          if [ "$CURRENT" != "$PREVIOUS" ]; then
            echo "changed=true" >> "$GITHUB_OUTPUT"
          else
            echo "changed=false" >> "$GITHUB_OUTPUT"
          fi

      - name: Generate notification message
        if: steps.versions.outputs.changed == 'true'
        id: random_message
        env:
          COMMIT_URL: "${{ github.server_url }}/${{ github.repository }}/commit/${{ github.sha }}"
          OLD: ${{ steps.versions.outputs.previous }}
          NEW: ${{ steps.versions.outputs.current }}
        run: |
          MESSAGES=(
            "🚀 Go version upgraded! From $OLD to $NEW. Time to go-go-go with the new features! $COMMIT_URL"
            "🐹 The Go gopher just got an upgrade! $OLD → $NEW. Hope it doesn't break anything, or we'll have a panic! $COMMIT_URL"
            "Go version change detected! $OLD is out, $NEW is in. Don't worry, it's just a minor version... said every developer ever. $COMMIT_URL"
            "Breaking news: Go version evolved! $OLD → $NEW. Darwin would be proud. $COMMIT_URL"
            "Go version upgrade: $OLD → $NEW. Fingers crossed this doesn't introduce any goroutine leaks! $COMMIT_URL"
            "Alert! Go version changed to $NEW from $OLD. The build might take longer, but at least the code will run faster! $COMMIT_URL"
            "Go version bump: $OLD → $NEW. Because why fix what ain't broke? Oh wait, we just did. $COMMIT_URL"
          )
          RANDOM_INDEX=$((RANDOM % ${#MESSAGES[@]}))
          echo "message=${MESSAGES[$RANDOM_INDEX]}" >> "$GITHUB_OUTPUT"

      - name: Notify Slack on Go version change
        if: steps.versions.outputs.changed == 'true'
        uses: slackapi/slack-github-action@v2
        with:
          webhook: ${{ secrets.SLACK_WEBHOOK_URL }}
          webhook-type: incoming-webhook
          payload: |
            {
              "text": "${{ steps.random_message.outputs.message }}"
            }