milestone-tracking.yml

name: Milestone tracking
on:
  pull_request_target:
    types: [closed]
permissions:
  issues: write
  pull-requests: write
jobs:
  add_milestone:
    runs-on: ubuntu-latest
    if: ${{ github.repository == 'dotnet/roslyn-analyzers' && github.event.pull_request.merged_at != null && github.event.pull_request.milestone == null && github.event.pull_request.base.ref == 'main' }}
    steps:
    - name: Get milestone data
      env:
        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        ORGANIZATION: dotnet
        REPOSITORY: roslyn-analyzers
        MILESTONE_NAME: vNext
      run: |
        gh api graphql -f query='
          query($org: String!, $repo: String!, $milestone: String!) {
            repository(name: $repo, owner: $org) {
              milestones(query: $milestone, first: 2) {
                nodes {
                  id
                  title
                }
              }
            }
          }' -f org=$ORGANIZATION -f repo=$REPOSITORY -f milestone="$MILESTONE_NAME" > milestone_data.json

        echo 'MILESTONE_ID='$(jq -r 'if (((.data.repository.milestones.nodes | length) == 1) and .data.repository.milestones.nodes[0].title == $MILESTONE_NAME) then .data.repository.milestones.nodes[0].id else "" end' --arg MILESTONE_NAME "$MILESTONE_NAME" milestone_data.json) >> $GITHUB_ENV

    - name: Assign milestone
      env:
        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        PULL_REQUEST_ID: ${{ github.event.pull_request.node_id }}
      if: ${{ env.MILESTONE_ID != '' }}
      run: |
        gh api graphql -f query='
          mutation($pull: ID!, $milestone: ID!) {
            updatePullRequest(input: {pullRequestId: $pull, milestoneId: $milestone}) {
              pullRequest {
                id
                number
                milestone {
                  id
                  number
                  title
                }
              }
            }
          }' -f pull=$PULL_REQUEST_ID -f milestone=$MILESTONE_ID