cancel-queued.yml

name: 🛑 Cancel queued workflows
run-name: 🛑 Cancel queued workflows${{ inputs.dry_run && ' [dry-run]' || '' }}

on:
  workflow_dispatch:
    inputs:
      dry_run:
        description: "🔍 Dry run — list what would be cancelled without actually cancelling"
        type: boolean
        default: false

permissions:
  actions: write

jobs:
  cancel-queued:
    name: Cancel queued / stalled runs
    runs-on: ubuntu-latest
    steps:
      - name: Cancel queued and stalled workflow runs
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          REPO: ${{ github.repository }}
          DRY_RUN: ${{ inputs.dry_run }}
        run: |
          set -euo pipefail

          cancelled=0
          skipped=0

          cancel_or_print() {
            local run_id="$1"
            local label="$2"
            if [ "$DRY_RUN" = "true" ]; then
              echo "  [DRY-RUN] would cancel: $label"
            else
              status=$(gh api \
                --method POST \
                -H "Accept: application/vnd.github+json" \
                "/repos/${REPO}/actions/runs/${run_id}/cancel" \
                --silent --include 2>&1 | head -1 | awk '{print $2}' || echo "error")
              if [ "$status" = "202" ]; then
                echo "  ✅ cancelled: $label"
              elif [ "$status" = "409" ]; then
                echo "  ⚠️  already finished (409): $label"
              else
                echo "  ❌ unexpected status ${status}: $label"
              fi
            fi
            cancelled=$((cancelled + 1))
          }

          has_active_jobs() {
            local run_id="$1"
            gh api \
              -H "Accept: application/vnd.github+json" \
              "/repos/${REPO}/actions/runs/${run_id}/jobs?filter=latest&per_page=100" \
              --jq '[.jobs[].status] | any(. == "in_progress")' 2>/dev/null || echo "false"
          }

          # ── Phase 1: fully queued runs ──────────────────────────────────────
          echo ""
          echo "=== Phase 1: queued runs ==="
          page=1
          while true; do
            batch=$(gh api \
              -H "Accept: application/vnd.github+json" \
              "/repos/${REPO}/actions/runs?status=queued&per_page=100&page=${page}" \
              --jq '.workflow_runs[] | "\(.id) \(.name) branch=\(.head_branch) started=\(.created_at) \(.html_url)"' \
              2>/dev/null || true)

            [ -z "$batch" ] && break

            count=0
            while IFS= read -r line; do
              run_id=$(echo "$line" | awk '{print $1}')
              label=$(echo "$line" | cut -d' ' -f2-)
              cancel_or_print "$run_id" "$label"
              count=$((count + 1))
            done <<< "$batch"

            [ "$count" -lt 100 ] && break
            page=$((page + 1))
          done

          echo "Phase 1 done."

          # ── Phase 2: in_progress runs with no actively running jobs ─────────
          echo ""
          echo "=== Phase 2: in_progress runs with no active jobs ==="
          page=1
          while true; do
            batch=$(gh api \
              -H "Accept: application/vnd.github+json" \
              "/repos/${REPO}/actions/runs?status=in_progress&per_page=100&page=${page}" \
              --jq '.workflow_runs[] | "\(.id) \(.name) branch=\(.head_branch) started=\(.created_at) \(.html_url)"' \
              2>/dev/null || true)

            [ -z "$batch" ] && break

            count=0
            while IFS= read -r line; do
              run_id=$(echo "$line" | awk '{print $1}')
              label=$(echo "$line" | cut -d' ' -f2-)
              active=$(has_active_jobs "$run_id")
              if [ "$active" = "true" ]; then
                echo "  ⏭  skipping (has active jobs): $label"
                skipped=$((skipped + 1))
              else
                cancel_or_print "$run_id" "$label"
              fi
              count=$((count + 1))
            done <<< "$batch"

            [ "$count" -lt 100 ] && break
            page=$((page + 1))
          done

          echo "Phase 2 done."

          # ── Summary ──────────────────────────────────────────────────────────
          echo ""
          echo "========================================"
          if [ "$DRY_RUN" = "true" ]; then
            echo "Would cancel : $cancelled"
          else
            echo "Cancelled    : $cancelled"
          fi
          echo "Skipped      : $skipped  (still actively running)"
          echo "========================================"