feat: use gen-readme from aarondill/github-actions

Author: aarondill

.github/workflows/gen-readme.yml

@@ -1,61 +1,9 @@
 name: Generate README
 on:
   push:
-  pull_request:
-    paths:
-      - "README.md" # This isn't needed, but it's a good sanity check
-      - "README.tmpl.md"
+  pull_request: { paths: ["README.md", "README.tmpl.md"] }
   workflow_dispatch:
 jobs:
   generate-readme:
-    runs-on: ubuntu-latest
-    permissions:
-      contents: write
-    steps:
-      - uses: actions/checkout@master
-        with: # We need to fetch enough commits to check if we've waited long enough
-          fetch-depth: 12
-      - name: Check if we've waited long enough (10+ commits)
-        id: commit-count
-        continue-on-error: true
-        run: |
-          [ '${{ github.event_name }}' != 'workflow_dispatch' ] || exit 0
-          last_sha=$(git log --oneline --format=format:%H --grep="^chore: Generate README$" -1)
-          echo "last_sha=$last_sha"
-          if [ -n "$last_sha" ]; then # success if last_sha is empty
-            count=$(git rev-list $last_sha..HEAD --count)
-            echo "count=$count"
-            [ $count -gt 10 ] || exit 1
-          fi
-      - name: Initialize README.md
-        if: ${{ steps.commit-count.outcome == 'success' }}
-        run: |
-          [ -f README.tmpl.md ] || cp README.md README.tmpl.md
-          printf '%s\n' "<!-- This file is generated from README.tmpl.md -->" > README.md
-          cat README.tmpl.md >> README.md
-
-      - name: CLOC
-        if: ${{ steps.commit-count.outcome == 'success' }}
-        uses: docker://aldanial/cloc
-        with: # Exclude YAML to avoid counting lock files
-          args: ${{ github.sha }} --md --report-file=cloc.md --hide-rate --exclude-lang=YAML
-
-      - name: output cloc.md
-        if: ${{ steps.commit-count.outcome == 'success' }}
-        run: cat cloc.md
-
-      # Note: initial newline is required because git files don't end with one
-      - name: Update README
-        if: ${{ steps.commit-count.outcome == 'success' }}
-        run: |
-          printf '\n' >> README.md
-          printf '%s\n' '### Lines of code' "<sup><sub>Generated at commit ${{ github.sha }}</sub></sup>" >> README.md
-          cat cloc.md >> README.md
-          rm cloc.md
-      - name: Commit README
-        uses: stefanzweifel/git-auto-commit-action@v4
-        if: ${{ steps.commit-count.outcome == 'success' }}
-        with:
-          commit_message: "chore: Generate README"
-          # Note: README.tmpl.md is needed in the first case
-          file_pattern: README.md README.tmpl.md
+    permissions: { contents: write }
+    uses: aarondill/github-actions/.github/workflows/gen-readme.yml@main