check-go-versions.yml

name: Check Supported Go Versions
on:
  schedule:
    - cron: "0 17 * * *"
  workflow_dispatch:

jobs:
  check-go-eol:
    runs-on: ubuntu-latest
    outputs:
      latest: ${{ steps.parse.outputs.latest }}
      penultimate: ${{ steps.parse.outputs.penultimate }}
    timeout-minutes: 2
    steps:
      - uses: actions/checkout@v4
        # Perform a GET request to endoflife.date for the Go language. The response
        # contains all Go releases; we're interested in the 0'th and 1'th (latest and penultimate.)
      - name: Fetch officially supported Go versions
        uses: JamesIves/fetch-api-data-action@396ebea7d13904824f85b892b1616985f847301c
        with:
          endpoint: https://endoflife.date/api/go.json
          configuration: '{ "method": "GET" }'
          debug: true
        # Parse the response JSON and insert into environment variables for the next step.
      - name: Parse officially supported Go versions
        id: parse
        run: |
          echo "latest=${{ fromJSON(env.fetch-api-data)[0].cycle }}" >> $GITHUB_OUTPUT
          echo "penultimate=${{ fromJSON(env.fetch-api-data)[1].cycle }}" >> $GITHUB_OUTPUT


  create-prs:
    permissions:
      contents: write
      pull-requests: write
    needs: check-go-eol
    runs-on: ubuntu-latest
    strategy:
      matrix:
        branch: ["v6", "v7"]
      fail-fast: false
    env:
      officialLatestVersion: ${{ needs.check-go-eol.outputs.latest }}
      officialPenultimateVersion: ${{ needs.check-go-eol.outputs.penultimate }}
    steps:
      - uses: actions/checkout@v4
        with:
          ref: ${{ matrix.branch }}

      - name: Get current Go versions
        id: go-versions
        run:  cat ./.github/variables/go-versions.env > $GITHUB_OUTPUT

      - name: Update go-versions.env and README.md
        if: steps.go-versions.outputs.latest != env.officialLatestVersion
        id: update-go-versions
        run: |
          sed -i -e "s#latest=[^ ]*#latest=${{ env.officialLatestVersion }}#g" \
                 -e "s#penultimate=[^ ]*#penultimate=${{ env.officialPenultimateVersion }}#g" \
                  ./.github/variables/go-versions.env
          sed -i "s/Go version ${{ steps.go-versions.outputs.penultimate }}/Go version ${{ env.officialPenultimateVersion }}/g" \
                  README.md

      - name: Update go.mod and testservice/go.mod
        if: steps.update-go-versions.outcome == 'success'
        id: update-go-mod
        run: |
          go mod edit -go=${{ env.officialPenultimateVersion }}
          cd testservice
          go mod edit -go=${{ env.officialPenultimateVersion }}

      - name: Create pull request
        if: steps.update-go-mod.outcome == 'success'
        uses: peter-evans/create-pull-request@v6
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          add-paths: |
            .github/variables/go-versions.env
            README.md
            go.mod
            testservice/go.mod
          branch: "launchdarklyreleasebot/update-to-go${{ env.officialLatestVersion }}-${{ matrix.branch }}"
          author: "LaunchDarklyReleaseBot <LaunchDarklyReleaseBot@launchdarkly.com>"
          committer: "LaunchDarklyReleaseBot <LaunchDarklyReleaseBot@launchdarkly.com>"
          labels: ${{ matrix.branch }}
          title: "fix(deps): bump supported Go versions to ${{ env.officialLatestVersion }} and ${{ env.officialPenultimateVersion }}"
          commit-message: "Bumps from Go ${{ steps.go-versions.outputs.latest }} -> ${{ env.officialLatestVersion }} and ${{ steps.go-versions.outputs.penultimate }} -> ${{ env.officialPenultimateVersion }}."
          body: |
            - [ ] I have triggered CI on this PR (either close & reopen this PR in Github UI, or `git commit -m "run ci" --allow-empty && git push`)