Add GitHub Action to credit new contributors (#400)

Author: vhscampos

.github/workflows/add-contributor.yaml

@@ -0,0 +1,95 @@
+# SPDX-FileCopyrightText: Copyright 2025 Arm Limited and/or its affiliates <[email protected]>
+#
+# SPDX-License-Identifier: Apache-2.0
+
+name: "Add author to all-contributors"
+
+on:
+  pull_request:
+    types: [closed]
+
+jobs:
+  add-contributor:
+    if: github.event.pull_request.merged == true
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/[email protected]
+
+      - name: Set up Python
+        uses: actions/[email protected]
+        with:
+          python-version: "3.x"
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install PyGithub
+
+      - name: Check and comment if needed
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          GITHUB_EVENT_PATH: ${{ github.event_path }}
+          GITHUB_REPOSITORY: ${{ github.repository }}
+        run: |
+          python << 'EOF'
+          import os
+          import json
+          from pathlib import Path
+          from github import Github
+
+          # 1) Load environment / event data
+          token       = os.environ["GITHUB_TOKEN"]
+          event_path  = os.environ["GITHUB_EVENT_PATH"]
+          repo_slug   = os.environ["GITHUB_REPOSITORY"]
+
+          with open(event_path, "r", encoding="utf-8") as f:
+              event = json.load(f)
+
+          pr_info = event.get("pull_request", {})
+          author  = pr_info.get("user", {}).get("login", "").strip()
+
+          # 2) Immediately ignore if author is the All Contributors bot
+          if author.lower() == "allcontributors[bot]":
+              print("PR authored by allcontributors[bot]; skipping.")
+              exit(0)
+
+          # 3) Attempt to read .all-contributorsrc
+          contributors_file = Path(".all-contributorsrc")
+          contributors_data = {"contributors": []}
+          if contributors_file.exists():
+              try:
+                  contributors_data = json.loads(contributors_file.read_text(encoding="utf-8"))
+              except json.JSONDecodeError:
+                  print("Warning: .all-contributorsrc is invalid JSON; assuming empty list.")
+          else:
+              print(".all-contributorsrc not found; assuming no contributors yet.")
+
+          # 4) Find if author is present and if they already have "code"
+          author_lower = author.lower()
+          entry = None
+          for c in contributors_data.get("contributors", []):
+              if c.get("login", "").lower() == author_lower:
+                  entry = c
+                  break
+
+          is_present = entry is not None
+          has_code   = (is_present and ("code" in entry.get("contributions", [])))
+
+          print(f"Author present? {is_present}")
+          print(f"Has 'code' contribution? {has_code}")
+
+          # 5) If missing or missing "code", post a comment via PyGithub
+          if (not is_present) or (not has_code):
+              # Authenticate and post comment
+              gh = Github(token)
+              repo = gh.get_repo(repo_slug)
+              pr_number = pr_info.get("number")
+              comment_body = f"@all-contributors please add @{author} for code"
+              repo.get_issue(pr_number).create_comment(body=comment_body)
+              print(f"Posted comment to add {author} for code.")
+          else:
+              print("No action needed; author already credited for code.")
+          EOF
+