Add ability to self-assign issues for non-committers (#21719)

.github/workflows/self-assign.yml

@@ -0,0 +1,45 @@
+# 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 or close an issue
+on: 
+  issue_comment:
+
+jobs:
+  assign:
+    name: Take or close an issue
+    runs-on: ubuntu-latest
+    steps:
+    - run: |
+        BODY="$(jq '.comment.body' $GITHUB_EVENT_PATH)"
+        ISSUE_NUMBER="$(jq '.issue.number' $GITHUB_EVENT_PATH)"
+        LOGIN="$(jq '.comment.user.login' $GITHUB_EVENT_PATH | tr -d \")"
+        REPO="$(jq '.repository.full_name' $GITHUB_EVENT_PATH | tr -d \")"
+        ISSUE_JSON="$(jq '.issue' $GITHUB_EVENT_PATH)"
+        if [[ $BODY == *"$INPUT_TAKE"* ]]; then
+          echo "Assigning issue $ISSUE_NUMBER to $LOGIN"
+          echo "Using the link: https://api.github.com/repos/$REPO/issues/$ISSUE_NUMBER/assignees"
+          curl -H "Authorization: token $GITHUB_TOKEN" -d '{"assignees":["'"$LOGIN"'"]}' https://api.github.com/repos/$REPO/issues/$ISSUE_NUMBER/assignees
+        fi
+        if [[ $BODY == *"$INPUT_CLOSE"* ]]; then
+          echo "Closing issue $ISSUE_NUMBER"
+          echo "Using the link: https://api.github.com/repos/$REPO/issues/$ISSUE_NUMBER"
+          curl -X PATCH -H "Authorization: token $GITHUB_TOKEN" -d '{"state":"closed"}' https://api.github.com/repos/$REPO/issues/$ISSUE_NUMBER
+        fi
+      shell: bash
+      env:
+        INPUT_TAKE: ".take-issue"
+        INPUT_CLOSE: ".close-issue"
+        GITHUB_TOKEN: ${{ github.token }}

website/www/site/content/en/contribute/get-started-contributing.md

@@ -109,7 +109,10 @@ Questions can be asked on the [#beam channel of the ASF Slack](https://beam.apac
 1. Find or create an issue in the [Beam repo](https://github.com/apache/beam/issues/new/choose).
    Tracking your work in an issue will avoid duplicated or conflicting work, and provide
    a place for notes. Later, your pull request will be linked to the issue as well.
-2. Comment on the issue saying that you would like to work on it.
+2. Comment ".take-issue" on the issue. This will cause the issue to be assigned to you.
+   When you've completed the issue, you can close it by commenting ".close-issue".
+   If you are a committer and would like to assign an issue to a non-committer, they must comment
+   on the issue first; please tag the user asking them to do so or to comment ".take-issue".
 3. If your change is large or it is your first change, it is a good idea to
    [discuss it on the [email protected] mailing list](https://beam.apache.org/community/contact-us/).
 4. For large changes create a design doc