set-milestone-on-pr.yaml

name: Set Milestone
on:
  pull_request:
    types:
      - assigned
      - opened
      - synchronize
      - reopened
      - edited
      - ready_for_review
      - review_requested
jobs:
  set-milestone:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
        with:
          fetch-depth: 0 # Required due to the way Git works, without it this action won't be able to find any or the correct tags
        if: github.event.pull_request.milestone == null
      - name: 'Get Previous tag'
        if: github.event.pull_request.milestone == null
        id: previousgittag
        continue-on-error: true
        uses: "WyriHaximus/github-action-get-previous-tag@master"
        env:
          GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
      - run: |
          if [ $(echo ${GITTAG} | wc -c) -eq 1 ] ; then
            printf "Falling back to v1.0.0 as \"%s\" is unexpectedly empty\r\n" "${GITTAG}"
            printf "::set-output name=tag::%s" "v1.0.0"
            exit 0
          fi

          printf "Using \"%s\"\r\n" "${GITTAG}"
          printf "::set-output name=tag::%s" "${GITTAG}"
        name: Fall back to v1.0.0 if we haven't tagged anything yet
        if: github.event.pull_request.milestone == null
        id: previoustag
        env:
          GITTAG: ${{ steps.previousgittag.outputs.tag }}
      - name: 'Get next versions'
        if: github.event.pull_request.milestone == null
        id: semvers
        uses: "WyriHaximus/github-action-next-semvers@master"
        with:
          version: ${{ steps.previoustag.outputs.tag }}
          strict: false
      - run: |
          if [ "$IS_DEPENDABOT" = true ] ; then
            echo "Is dependabot PR"
            if [[ "$(printenv MILESTONES | jq -c '. | length')" -eq "0" ]] ; then
              echo "No milestone exists, usint patch version for next milestone"
              printf "::set-output name=milestone::%s" "${PATCH}"
              exit 0
            fi
          fi

          echo "Using default minor version for next milestone"
          printf "::set-output name=milestone::%s" "${MINOR}"
        name: Decide which version to use as milestone
        if: github.event.pull_request.milestone == null
        id: milestone
        env:
          MILESTONES: ${{ steps.milestones.outputs.milestones }}
          MAJOR: ${{ steps.semvers.outputs.v_major }}
          MINOR: ${{ steps.semvers.outputs.v_minor }}
          PATCH: ${{ steps.semvers.outputs.v_patch }}
          IS_DEPENDABOT: ${{ contains(github.ref, 'dependabot') }}
          GITTAG: ${{ steps.previousgittag.outputs.tag }}
          PREVIOUSTAG: ${{ steps.previoustag.outputs.tag }}
      - name: 'Get Milestones'
        if: github.event.pull_request.milestone == null
        uses: "WyriHaximus/github-action-get-milestones@master"
        id: milestones
        env:
          GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
      - run: printf "::set-output name=number::%s" $(printenv MILESTONES | jq --arg MILESTONE $(printenv MILESTONE) '.[]  | select(.title == $MILESTONE) | .number')
        if: github.event.pull_request.milestone == null
        id: querymilestone
        env:
          MILESTONES: ${{ steps.milestones.outputs.milestones }}
          MILESTONE: ${{ steps.milestone.outputs.milestone }}
      - name: 'Create Milestone'
        if: github.event.pull_request.milestone == null && steps.querymilestone.outputs.number == ''
        id: createmilestone
        uses: "WyriHaximus/github-action-create-milestone@master"
        with:
          title: ${{ steps.milestone.outputs.milestone }}
        env:
          GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
      - name: 'Select found or created Milestone'
        if: github.event.pull_request.milestone == null
        id: selectmilestone
        run: |
          if [ $(echo ${QUERY_NUMBER} | wc -c) -eq 1 ] ; then
            printf "::set-output name=number::%s" "${CREATED_NUMBER}"
            exit 0
          fi

          printf "::set-output name=number::%s" "${QUERY_NUMBER}"
        env:
          CREATED_NUMBER: ${{ steps.createmilestone.outputs.number }}
          QUERY_NUMBER: ${{ steps.querymilestone.outputs.number }}
      - name: 'Set Milestone'
        if: github.event.pull_request.milestone == null
        uses: "WyriHaximus/github-action-set-milestone@master"
        with:
          issue_number: ${{ github.event.pull_request.number }}
          milestone_number: ${{ steps.selectmilestone.outputs.number }}
        env:
          GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"