accepted-label.yml

name: Accepted label

# A merged PR counts on the leaderboard (oss.codercops.com) only with the
# codercops-accepted label, and only for an issue that was assigned to its
# author (CONTRIBUTING.md). PRs merged in October also get hacktoberfest-accepted.
# Maintainers add the label when they merge. This adds it when that was missed,
# by the same rule as the claim check: every issue the PR closes is assigned to
# the author. It runs once, at the merge, so removing the label later sticks.
#
# It uses pull_request_target so it can label fork PRs. That is safe here: the
# job never checks out or runs the PR's code.
on:
  pull_request_target:
    branches: [dev]
    types: [closed]

permissions:
  issues: read
  pull-requests: write

jobs:
  label:
    name: Label a merged contributor PR
    # Maintainers and bots don't claim issues, and spam never counts. Outside
    # collaborators (contributors with Triage) are labeled like everyone else.
    if: >-
      github.event.pull_request.merged == true &&
      github.event.pull_request.user.type != 'Bot' &&
      !contains(fromJSON('["OWNER", "MEMBER"]'), github.event.pull_request.author_association) &&
      !contains(github.event.pull_request.labels.*.name, 'codercops-accepted') &&
      !contains(github.event.pull_request.labels.*.name, 'spam')
    runs-on: ubuntu-latest
    steps:
      - name: Add the label if every linked issue is assigned to the author
        env:
          GH_TOKEN: ${{ github.token }}
          REPO: ${{ github.repository }}
          PR: ${{ github.event.pull_request.number }}
          MERGED_AT: ${{ github.event.pull_request.merged_at }}
        run: |
          set -euo pipefail

          pr=$(gh api graphql \
            -f owner="${REPO%/*}" -f name="${REPO#*/}" -F pr="$PR" \
            -f query='query($owner: String!, $name: String!, $pr: Int!) {
              repository(owner: $owner, name: $name) {
                pullRequest(number: $pr) {
                  author { login }
                  body
                  closingIssuesReferences(first: 20) {
                    nodes { number repository { nameWithOwner } assignees(first: 20) { nodes { login } } }
                  }
                }
              }
            }' \
            --jq '.data.repository.pullRequest')
          author=$(jq -r '.author.login // ""' <<<"$pr")

          # The issues this PR closed ("Closes #12" in the description).
          linked=$(jq --arg repo "$REPO" '[ .closingIssuesReferences.nodes[] | {
            ref: (if .repository.nameWithOwner == $repo then "#\(.number)" else "\(.repository.nameWithOwner)#\(.number)" end),
            assignees: [.assignees.nodes[].login]
          } ]' <<<"$pr")

          # Same fallback as the claim check: read "Closes #12" from the description.
          if [ "$(jq length <<<"$linked")" -eq 0 ]; then
            numbers=$(jq -r '[ (.body // "") | scan("(?i)\\b(?:close[sd]?|fix(?:e[sd])?|resolve[sd]?)\\s*:?\\s+#([0-9]+)") | .[0] ] | unique | .[]' <<<"$pr")
            for number in $numbers; do
              if issue=$(gh api "repos/$REPO/issues/$number" --jq 'select(.pull_request == null) | {ref: "#\(.number)", assignees: [.assignees[].login]}' 2>/dev/null) && [ -n "$issue" ]; then
                linked=$(jq --argjson issue "$issue" '. + [$issue]' <<<"$linked")
              fi
            done
          fi

          if [ "$(jq length <<<"$linked")" -eq 0 ]; then
            echo "::notice title=Not labeled::This PR isn't linked to an issue, so it doesn't get codercops-accepted."
            exit 0
          fi

          missing=$(jq -r --arg author "$author" '
            [ .[]
              | select(all(.assignees[]; ascii_downcase != ($author | ascii_downcase)))
              | .ref ]
            | join(", ")' <<<"$linked")

          if [ -n "$missing" ]; then
            echo "::notice title=Not labeled::$missing isn't assigned to @$author, so this PR doesn't get codercops-accepted."
            exit 0
          fi

          labels=(-f "labels[]=codercops-accepted")
          # Hacktoberfest only counts PRs merged in October (UTC).
          if [ "${MERGED_AT:5:2}" = "10" ]; then labels+=(-f "labels[]=hacktoberfest-accepted"); fi
          gh api -X POST "repos/$REPO/issues/$PR/labels" "${labels[@]}" --silent
          echo "Labeled: $(jq -r '[.[].ref] | join(", ")' <<<"$linked") assigned to @$author"