cloudtty-build-push.yml

name: CloudTTY Build and Versioning

on:
  push:
    branches:
      - 'main'
      - 'APL-369'

env:
  NAMESPACE: linode
  REPO: apl-tty

jobs:
  build-and-version:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout code
        uses: actions/checkout@v4
        with:
          fetch-depth: '2'

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Determine version
        id: determine-version
        run: |

          set -e

          if "${{ github.ref_name }}" != "main"; then
            NEW_VERSION="${{ github.ref_name }}"
            echo "NEW_VERSION=${NEW_VERSION}" >> $GITHUB_ENV
            exit 0
          fi
          # # Set the first image version to '0.1.0' if the repo does not exists.
          # if ! curl -s -L --fail "https://hub.docker.com/v2/repositories/${{ env.NAMESPACE }}/${{ env.REPO }}"; then echo "NEW_VERSION=0.1.0" >> $GITHUB_ENV && exit 0; fi

          # Get data for latest 10 versions of the image and filter the ones matching our semver pattern. Set the OLD_VERSION environment variable to the latest version.
          # The grep command matches the strings following this pattern: starts with an up to 2 digits number, a dot, an up to 3 digit number, a dot, ends with an up to 4 digits number
          REPO_URL="https://hub.docker.com/v2/repositories/${{ env.NAMESPACE }}/${{ env.REPO }}/tags/?page_size=10"
          OLD_VERSION="$(curl -s -L --fail ${REPO_URL} | jq '.results[].name' -r | grep -E '^[0-9]{0,2}.[0-9]{0,3}.[0-9]{0,4}$' | head -n 1)"
          echo "OLD_VERSION=${OLD_VERSION}" >> $GITHUB_ENV

          if git log --format=%B -n 1 ${{ github.sha }} | grep -q "\[TTY\]\[MAJOR\]"; then
            # If a "[TTY][MAJOR]" commit is found, increment the major version by one and reset the minor and patch version to '0'.
            NEW_VERSION="$(echo ${OLD_VERSION} | awk -F. -v OFS=. '{$1 = $1 + 1; $2 = 0; $3 = 0} {print $0}')"
            echo "NEW_VERSION=${NEW_VERSION}" >> $GITHUB_ENV
            echo OLD_VERSION = ${OLD_VERSION}
            echo NEW_VERSION = ${NEW_VERSION}
          elif git log --format=%B -n 1 ${{ github.sha }} | grep -q "\[TTY\]\[MINOR\]"; then
            # If a "[TTY][MINOR]" commit is found, increment the minor version by one and reset the patch version to '0'.
            NEW_VERSION="$(echo ${OLD_VERSION} | awk -F. -v OFS=. '{$2 = $2 + 1; $3 = 0} {print $0}')"
            echo "NEW_VERSION=${NEW_VERSION}" >> $GITHUB_ENV
            echo OLD_VERSION = ${OLD_VERSION}
            echo NEW_VERSION = ${NEW_VERSION}
          elif git diff-tree --no-commit-id --name-only ${{ github.sha }} -r | grep -q "tools\/Dockerfile-tty"; then
            # No special tag found, but changes were made to the tools/Dockerfile-tty so will upgrade the patch version.
            NEW_VERSION="$(echo ${OLD_VERSION} | awk -F. -v OFS=. '{$3 = $3 + 1} {print $0}')"
            echo "NEW_VERSION=${NEW_VERSION}" >> $GITHUB_ENV
            echo OLD_VERSION = ${OLD_VERSION}
            echo NEW_VERSION = ${NEW_VERSION}
          fi

          echo "No need to bump the version. Will skip next steps."

      - name: Build and tag Docker image
        if: ${{ env.NEW_VERSION != null }}
        run: |
          docker buildx build --load -t ${{ env.NAMESPACE }}/${{ env.REPO }}:${{ env.NEW_VERSION }} -t ${{ env.NAMESPACE }}/${{ env.REPO }}:latest -f tools/Dockerfile-tty .

      - name: Squash image
        if: ${{ env.NEW_VERSION != null }}
        run: |
          pip3 install docker-squash
          docker-squash ${{ env.NAMESPACE }}/${{ env.REPO }} -t ${{ env.NAMESPACE }}/${{ env.REPO }}:${{ env.NEW_VERSION }}

      - name: Login to GitHub Container Registry
        if: ${{ env.NEW_VERSION != null }}
        uses: docker/login-action@v3
        with:
          username: ${{ vars.DOCKERHUB_LINODEBOT_USERNAME }}
          password: ${{ secrets.DOCKERHUB_LINODEBOT_TOKEN }}

      - name: Push Docker image
        if: ${{ env.NEW_VERSION != null }}
        run: |
          docker push ${{ env.NAMESPACE }}/${{ env.REPO }}:${{ env.NEW_VERSION }}
          docker push ${{ env.NAMESPACE }}/${{ env.REPO }}:latest