chore: Add take/untake workflow for issue self-assignment (apache#3270)

Adds a GitHub Actions workflow that allows contributors to self-assign
issues by commenting "take" and unassign by commenting "untake".

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

Author: 2 people

.github/workflows/take.yml

@@ -0,0 +1,55 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+name: Assign/unassign the issue via `take` or `untake` comment
+on:
+  issue_comment:
+    types: created
+
+permissions:
+  issues: write
+
+jobs:
+  issue_assign:
+    runs-on: ubuntu-latest
+    if: (!github.event.issue.pull_request) && (github.event.comment.body == 'take' || github.event.comment.body == 'untake')
+    concurrency:
+      group: ${{ github.actor }}-issue-assign
+    steps:
+      - name: Take or untake issue
+        env:
+          COMMENT_BODY: ${{ github.event.comment.body }}
+          ISSUE_NUMBER: ${{ github.event.issue.number }}
+          USER_LOGIN: ${{ github.event.comment.user.login }}
+          REPO: ${{ github.repository }}
+          TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          if [ "$COMMENT_BODY" == "take" ]
+          then
+            CODE=$(curl -H "Authorization: token $TOKEN" -LI https://api.github.com/repos/$REPO/issues/$ISSUE_NUMBER/assignees/$USER_LOGIN -o /dev/null -w '%{http_code}\n' -s)
+            if [ "$CODE" -eq "204" ]
+            then
+              echo "Assigning issue $ISSUE_NUMBER to $USER_LOGIN"
+              curl -X POST -H "Authorization: token $TOKEN" -H "Content-Type: application/json" -d "{\"assignees\": [\"$USER_LOGIN\"]}" https://api.github.com/repos/$REPO/issues/$ISSUE_NUMBER/assignees
+            else
+              echo "Cannot assign issue $ISSUE_NUMBER to $USER_LOGIN"
+            fi
+          elif [ "$COMMENT_BODY" == "untake" ]
+          then
+            echo "Unassigning issue $ISSUE_NUMBER from $USER_LOGIN"
+            curl -X DELETE -H "Authorization: token $TOKEN" -H "Content-Type: application/json" -d "{\"assignees\": [\"$USER_LOGIN\"]}" https://api.github.com/repos/$REPO/issues/$ISSUE_NUMBER/assignees
+          fi

docs/source/contributor-guide/contributing.md

@@ -32,6 +32,8 @@ Here are some areas where you can help:
 
 We maintain a list of good first issues in GitHub [here](https://github.com/apache/datafusion-comet/issues?q=is%3Aopen+is%3Aissue+label%3A%22good+first+issue%22). We also have a [roadmap](roadmap.md).
 
+To assign yourself an issue, comment `take` on the issue. To unassign yourself, comment `untake`.
+
 ## Reporting issues
 
 We use [GitHub issues](https://github.com/apache/datafusion-comet/issues) for bug reports and feature requests.