# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

name: release

# Expects git tags in the following formats:
#   airshipctl: v1.2.3 (no prefix)
#   krm functions: <quay image name>-v1.2.3 e.g. replacement-transformer-v1.2.3
on:
  push:
    tags:
      - '*'

jobs:
  # Parses git tags to determine quay image name and semver version and publishes
  # corresponding image tags in quay for the full semver version as well as major
  # and minor versions if not a prerelease.
  release-image:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v2
      - name: Calculate semver tags
        id: semver_tags
        run: |
          set -x
          set -e

          TAG=$(echo "${TAG_REF}" | sed -e 's|refs/tags/||')
          for IMG in airshipctl $(cd krm-functions; echo */ | tr -d /)
          do
            if [[ $IMG == airshipctl ]]
            then
              TAG_PREFIX=
            else
              TAG_PREFIX=$IMG-
            fi
            if [[ "$TAG" =~ ^($TAG_PREFIX)?v?(([0-9]+)\.([0-9]+)\.([0-9]+)(-[a-zA-Z]+(\.[0-9]+)?)?)$ ]]
            then
              TAGS="v${BASH_REMATCH[2]}"
              # Prereleases don't count as major and minor
              if [[ -z ${BASH_REMATCH[6]} ]]
              then
                MINOR_TAG="v${BASH_REMATCH[3]}.${BASH_REMATCH[4]}"
                MAJOR_TAG="v${BASH_REMATCH[3]}"
                TAGS="$TAGS $MINOR_TAG $MAJOR_TAG"
              fi
              echo ::set-output name=IMG::$IMG
              echo ::set-output name=TAGS::$TAGS
              exit 0
            fi
          done
          echo No valid semver tag found
          exit 1
        env:
          TAG_REF: ${{ github.ref }}
      - name: Login to image registry
        uses: docker/login-action@v1
        with:
          registry: quay.io
          username: ${{ secrets.QUAY_USERNAME }}
          password: ${{ secrets.QUAY_PASSWORD }}
      - name: Publish semver image tags
        run: |
          set -x
          set -e

          SOURCE_TAG=$IMG:$SOURCE
          docker pull $SOURCE_TAG
          for i in $TARGETS
          do
            TARGET_TAG=$IMG:$i
            docker tag $SOURCE_TAG $TARGET_TAG
            docker push $TARGET_TAG
          done
        env:
          IMG: ${{ format('quay.io/airshipit/{0}', steps.semver_tags.outputs.IMG) }}
          SOURCE: ${{ github.sha }}
          TARGETS: ${{ steps.semver_tags.outputs.TAGS }}

  release-github:
    # Only create github releases for airshipctl (unprefixed semver tag), not krm functions.
    if: ${{ startsWith(github.ref, 'refs/tags/v') }}
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v2
        with:
          fetch-depth: 0
      - name: Download release notes utility
        run: |
          sudo npm install github-release-notes@0.17.1 -g
      - name: Generate release notes
        run: |
          TAG_NAME=${TAG##*/}
          gren changelog --override --generate \
            --username airshipit --repo airshipctl \
            --changelog-filename release-notes.md \
            --token "$GITHUB_TOKEN" \
            --tags "$TAG_NAME" \
            --ignore-tags-with '^(?!v\d)' `# only consider semver tags without krm function prefix when finding previous tag` \
            --debug
          cat release-notes.md
        env:
          TAG: ${{ github.ref }}
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
      - name: Setup Go
        uses: actions/setup-go@v2
        with:
          go-version: 1.13.x
      - name: Generate binaries and create github release
        uses: goreleaser/goreleaser-action@v1
        with:
          version: latest
          args: release --release-notes=release-notes.md --skip-validate --debug
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}