Add repository stats workflow with Slack integration

.github/workflows/repo-stats.yml

@@ -0,0 +1,189 @@
+name: Repository stats (PRs & Issues)
+
+on:
+  workflow_dispatch:
+    inputs:
+      days:
+        description: "Number of days to look back"
+        required: false
+        default: 7
+        type: number
+      post_to_slack:
+        description: "Post report to Slack"
+        required: false
+        default: false
+        type: boolean
+  schedule:
+    # Weekly on Monday at 09:00 UTC
+    - cron: "0 9 * * 1"
+
+jobs:
+  gather-stats:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      pull-requests: read
+      issues: read
+    steps:
+      - name: Gather PR and issue stats
+        id: stats
+        env:
+          GH_REPO: ${{ github.repository }}
+          GH_SERVER: ${{ github.server_url }}
+          DAYS_RAW: ${{ github.event.inputs.days || 7 }}
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          # Clamp days to 1–365
+          DAYS=$DAYS_RAW
+          if ! [[ "$DAYS" =~ ^[0-9]+$ ]] || [[ "$DAYS" -lt 1 ]]; then DAYS=7; fi
+          if [[ "$DAYS" -gt 365 ]]; then DAYS=365; fi
+
+          START=$(date -u -d "${DAYS} days ago" +%Y-%m-%d)
+          END=$(date -u +%Y-%m-%d)
+
+          echo "start_date=$START" >> $GITHUB_OUTPUT
+          echo "end_date=$END" >> $GITHUB_OUTPUT
+
+          OWNER="${GH_REPO%%/*}"
+          REPO="${GH_REPO#*/}"
+          API="https://api.github.com/repos/${OWNER}/${REPO}"
+
+          # Fetch all data
+          curl -sS -H "Authorization: token $GITHUB_TOKEN" -H "Accept: application/vnd.github.v3+json" \
+            "${API}/pulls?state=all&sort=created&direction=desc&per_page=100" > /tmp/pulls_all.json
+          curl -sS -H "Authorization: token $GITHUB_TOKEN" -H "Accept: application/vnd.github.v3+json" \
+            "${API}/pulls?state=closed&sort=updated&direction=desc&per_page=100" > /tmp/pulls_closed.json
+          curl -sS -H "Authorization: token $GITHUB_TOKEN" -H "Accept: application/vnd.github.v3+json" \
+            "${API}/issues?state=all&sort=created&direction=desc&per_page=100" > /tmp/issues_all.json
+          curl -sS -H "Authorization: token $GITHUB_TOKEN" -H "Accept: application/vnd.github.v3+json" \
+            "${API}/issues?state=closed&sort=updated&direction=desc&per_page=100" > /tmp/issues_closed.json
+
+          # Counts for the period
+          PR_OPENED=$(jq -r --arg start "$START" '[.[] | select(.created_at[:10] >= $start)] | length' /tmp/pulls_all.json)
+          PR_MERGED=$(jq -r --arg start "$START" '[.[] | select(.merged_at != null and (.merged_at[:10] >= $start))] | length' /tmp/pulls_closed.json)
+          PR_CLOSED=$(jq -r --arg start "$START" '[.[] | select(.merged_at == null and .closed_at != null and (.closed_at[:10] >= $start))] | length' /tmp/pulls_closed.json)
+          ISSUES_OPENED=$(jq -r --arg start "$START" '[.[] | select(.pull_request == null and .created_at[:10] >= $start)] | length' /tmp/issues_all.json)
+          ISSUES_CLOSED=$(jq -r --arg start "$START" '[.[] | select(.pull_request == null and .closed_at != null and (.closed_at[:10] >= $start))] | length' /tmp/issues_closed.json)
+
+          BASE="$GH_SERVER/$GH_REPO"
+
+          # --- detail.md: full overview with counts in headings ---
+          echo "## Detailed repository activity: $START → $END" > detail.md
+          echo "" >> detail.md
+
+          echo "### Pull requests created ($PR_OPENED)" >> detail.md
+          echo "" >> detail.md
+          jq -r --arg start "$START" --arg base "$BASE" '.[] | select(.created_at[:10] >= $start) | "- [\(.state | ascii_upcase)] [#\(.number) \(.title) (created: \(.created_at[:10]))](\($base)/pull/\(.number))"' /tmp/pulls_all.json > /tmp/pr_created.txt 2>/dev/null || true
+          [ -s /tmp/pr_created.txt ] && cat /tmp/pr_created.txt >> detail.md || echo "- No PRs in this period" >> detail.md
+          echo "" >> detail.md
+
+          echo "### Pull requests merged ($PR_MERGED)" >> detail.md
+          echo "" >> detail.md
+          jq -r --arg start "$START" --arg base "$BASE" '.[] | select(.merged_at != null and (.merged_at[:10] >= $start)) | "- [#\(.number) \(.title) (merged: \(.merged_at[:10]))](\($base)/pull/\(.number))"' /tmp/pulls_closed.json > /tmp/pr_merged.txt 2>/dev/null || true
+          [ -s /tmp/pr_merged.txt ] && cat /tmp/pr_merged.txt >> detail.md || echo "- No merged PRs in this period" >> detail.md
+          echo "" >> detail.md
+
+          echo "### Pull requests closed ($PR_CLOSED)" >> detail.md
+          echo "" >> detail.md
+          jq -r --arg start "$START" --arg base "$BASE" '.[] | select(.merged_at == null and .closed_at != null and (.closed_at[:10] >= $start)) | "- [#\(.number) \(.title) (closed: \(.closed_at[:10]))](\($base)/pull/\(.number))"' /tmp/pulls_closed.json > /tmp/pr_closed.txt 2>/dev/null || true
+          [ -s /tmp/pr_closed.txt ] && cat /tmp/pr_closed.txt >> detail.md || echo "- No closed (unmerged) PRs in this period" >> detail.md
+          echo "" >> detail.md
+
+          echo "### Issues opened ($ISSUES_OPENED)" >> detail.md
+          echo "" >> detail.md
+          jq -r --arg start "$START" --arg base "$BASE" '.[] | select(.pull_request == null and .created_at[:10] >= $start) | "- [\(.state | ascii_upcase)] [#\(.number) \(.title) (opened: \(.created_at[:10]))](\($base)/issues/\(.number))"' /tmp/issues_all.json > /tmp/issue_opened.txt 2>/dev/null || true
+          [ -s /tmp/issue_opened.txt ] && cat /tmp/issue_opened.txt >> detail.md || echo "- No issues in this period" >> detail.md
+          echo "" >> detail.md
+
+          echo "### Issues closed ($ISSUES_CLOSED)" >> detail.md
+          echo "" >> detail.md
+          jq -r --arg start "$START" --arg base "$BASE" '.[] | select(.pull_request == null and .closed_at != null and (.closed_at[:10] >= $start)) | "- [#\(.number) \(.title) (closed: \(.closed_at[:10]))](\($base)/issues/\(.number))"' /tmp/issues_closed.json > /tmp/issue_closed.txt 2>/dev/null || true
+          [ -s /tmp/issue_closed.txt ] && cat /tmp/issue_closed.txt >> detail.md || echo "- No closed issues in this period" >> detail.md
+
+          # --- slack.md + slack_report.txt: Slack summary (PRs opened/closed/merged, Issues opened/closed) ---
+          {
+            echo ":books: *Weekly Docs Update (Git Repository)*"
+            echo ""
+            echo "*Dev Docs*"
+            echo ""
+            echo "*PRs*"
+            echo ":inbox_tray: $PR_OPENED PRs opened"
+            echo ":white_check_mark: $PR_MERGED PRs merged"
+            echo ":lock: $PR_CLOSED PRs closed"
+            echo ""
+            echo "*Issues*"
+            echo ":inbox_tray: $ISSUES_OPENED issues opened"
+            echo ":ladybug: $ISSUES_CLOSED issues closed"
+            echo ""
+            echo "View workflow run: $BASE/actions/runs/${{ github.run_id }}"
+          } > slack.md
+          echo "" >> slack.md
+          echo '```' >> slack.md
+          cat detail.md >> slack.md
+          echo '```' >> slack.md
+          cp slack.md slack_report.txt
+
+      - name: Upload report
+        uses: actions/upload-artifact@v4
+        with:
+          name: repo-stats-report-${{ matrix.repo }}
+          path: |
+            detail.md
+            slack.md
+
+      - name: Print detail report
+        run: cat detail.md
+
+      - name: Prepare Slack payload
+        id: slack_payload
+        if: (github.event_name == 'workflow_dispatch' && github.event.inputs.post_to_slack == 'true') || (github.event_name == 'schedule')
+        env:
+          START_DATE: ${{ steps.stats.outputs.start_date }}
+          END_DATE: ${{ steps.stats.outputs.end_date }}
+          GH_SERVER: ${{ github.server_url }}
+          GH_REPO: ${{ github.repository }}
+          GITHUB_RUN_ID: ${{ github.run_id }}
+        run: |
+          # Split slack_report.txt into ≤3000-char chunks at newline boundaries
+          awk '
+            BEGIN { n=0; cur=""; len=0 }
+            {
+              l = length($0) + 1
+              if (len + l > 3000 && len > 0) {
+                printf "%s", cur > ("/tmp/sw_chunk_" n ".txt")
+                n++; cur = $0 "\n"; len = l
+              } else { cur = cur $0 "\n"; len += l }
+            }
+            END {
+              if (len > 0) { printf "%s", cur > ("/tmp/sw_chunk_" n ".txt"); n++ }
+              print n > "/tmp/sw_chunk_count.txt"
+            }
+          ' slack_report.txt
+
+          NUM_CHUNKS=$(cat /tmp/sw_chunk_count.txt)
+          if ! [[ "$NUM_CHUNKS" =~ ^[0-9]+$ ]] || [[ "$NUM_CHUNKS" -lt 1 ]]; then NUM_CHUNKS=1; fi
+          RAWFILE_ARGS=()
+          SECTION_EXPRS=()
+          for i in $(seq 0 $((NUM_CHUNKS - 1))); do
+            RAWFILE_ARGS+=(--rawfile "c${i}" "/tmp/sw_chunk_${i}.txt")
+            SECTION_EXPRS+=("{\"type\":\"section\",\"text\":{\"type\":\"mrkdwn\",\"text\":\$c${i}}}")
+          done
+          SECTIONS_STR=$(IFS=','; echo "${SECTION_EXPRS[*]}")
+
+          jq -n "${RAWFILE_ARGS[@]}" \
+            --arg start "$START_DATE" --arg end "$END_DATE" \
+            --arg link "$GH_SERVER/$GH_REPO/actions/runs/$GITHUB_RUN_ID" \
+            '{blocks:([{type:"header",text:{type:"plain_text",text:"📚 Weekly API Docs Update (Git Repository)",emoji:true}},{type:"context",elements:[{type:"mrkdwn",text:($start+" → "+$end+"  |  <"+$link+"|View run>")}]},{type:"divider"}]+['"$SECTIONS_STR"'])}' \
+            > payload.json
+          echo "payload<<EOF" >> $GITHUB_OUTPUT
+          cat payload.json >> $GITHUB_OUTPUT
+          echo "EOF" >> $GITHUB_OUTPUT
+
+      - name: Post to Slack
+        if: (github.event_name == 'workflow_dispatch' && github.event.inputs.post_to_slack == 'true') || (github.event_name == 'schedule')
+        uses: slackapi/slack-github-action@v1.24.0
+        with:
+          payload: ${{ steps.slack_payload.outputs.payload }}
+        env:
+          SLACK_WEBHOOK_URL: ${{ secrets.SLACK_NOTIFICATIONS_WEBHOOK }}
+          SLACK_WEBHOOK_TYPE: INCOMING_WEBHOOK