Docathon: Add workflow to assign user on comment (#19294)

This workflow assigns a user to an issue when a comment containing
'/assigntome' is made, provided the issue has the 'docathon-2026' label.

cc @mergennachin @AlannaBurke

Author: nil-is-all

.github/workflows/assigntome-docathon.yml

@@ -0,0 +1,60 @@
+name: Assign User on Comment
+
+on:
+  workflow_dispatch:
+  issue_comment:
+    types: [created]
+
+jobs:
+  assign:
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write
+    steps:
+      - name: Check for "/assigntome" in comment
+        uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea # v7.0.1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          script: |
+            const issueComment = context.payload.comment.body;
+            const assignRegex = /\/assigntome/i;
+            if (assignRegex.test(issueComment)) {
+              const assignee = context.payload.comment.user.login;
+              const issueNumber = context.payload.issue.number;
+              try {
+                const { data: issue } = await github.rest.issues.get({
+                  owner: context.repo.owner,
+                  repo: context.repo.repo,
+                  issue_number: issueNumber
+                });
+              const hasLabel = issue.labels.some(label => label.name === 'docathon-2026');
+              if (hasLabel) {
+                if (issue.assignee !== null) {
+                  await github.rest.issues.createComment({
+                    owner: context.repo.owner,
+                    repo: context.repo.repo,
+                    issue_number: issueNumber,
+                    body: "The issue is already assigned. Please pick an opened and unnasigned issue with the [docathon-2026 label](https://github.com/pytorch/executorch/issues?q=is%3Aopen+is%3Aissue+label%3Adocathon-2026)"
+                  });
+                } else {
+                  await github.rest.issues.addAssignees({
+                    owner: context.repo.owner,
+                    repo: context.repo.repo,
+                    issue_number: issueNumber,
+                    assignees: [assignee]
+                  });
+                }
+              } else {
+                const commmentMessage = "This issue does not have the correct label. Please pick an opened and unnasigned issue with the [docathon-2026 label](https://github.com/pytorch/executorch/issues?q=is%3Aopen+is%3Aissue+label%3Adocathon-2026)";
+                await github.rest.issues.createComment({
+                  owner: context.repo.owner,
+                  repo: context.repo.repo,
+                  issue_number: issueNumber,
+                  body: commmentMessage
+                });
+               }
+              } catch (error) {
+                console.error(error);
+              }
+            }

.github/workflows/docathon-sync-label.yml

@@ -0,0 +1,31 @@
+name: Docathon Labels Sync
+
+on:
+  pull_request_target:
+    types: [opened, synchronize, edited]
+    branches: [main]
+
+jobs:
+  check-labels:
+    if: github.repository_owner == 'pytorch'
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write
+      pull-requests: write
+    steps:
+      - name: Check out the repo
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        with:
+          fetch-depth: 1
+      - name: Set up Python
+        uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5.6.0
+        with:
+          python-version: 3.x
+      - name: Install dependencies
+        run: |
+          pip install requests==2.32.3
+          pip install PyGithub==2.3.0
+      - name: Run Python script
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: python ./.github/scripts/docathon-label-sync.py ${{ github.event.pull_request.number }}