Add the assign workflow (#2320)

Adding a workflow that allows users without repo access assign issues to themselves by commenting on an issue with the docathon label: "/assigntome"

Author: Svetlana Karslioglu

.github/workflows/docathon-assign.yml

@@ -0,0 +1,65 @@
+name: Assign User on Comment
+
+on:
+  workflow_dispatch:
+  issue_comment:
+    types: [created]
+
+jobs:
+  assign:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Install Dependencies
+        uses: actions/setup-node@v3
+        with:
+          node-version: '18'
+      - name: Install @octokit/core
+        run: |
+          npm i @octokit/core @octokit/rest
+      - name: Check for "/assigntome" in comment
+        uses: actions/github-script@v4
+        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;
+              const { Octokit } = require("@octokit/rest");
+              const octokit = new Octokit({
+                auth: process.env.GITHUB_TOKEN,
+              });
+              const { data: issue } = await octokit.issues.get({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                issue_number: issueNumber
+              });
+              const hasLabel = issue.labels.some(label => label.name === 'docathon-h1-2023');
+              if (hasLabel) {
+                if (issue.assignee !== null) {
+                  await octokit.issues.createComment({
+                    owner: context.repo.owner,
+                    repo: context.repo.repo,
+                    issue_number: issueNumber,
+                    body: "The issue is already assigned. Please pick an open and unnasigned issue with the [docathon-h1-2023 label](https://github.com/pytorch/tutorials/issues?q=is%3Aopen+is%3Aissue+label%3Adocathon-h1-2023)."
+                  });
+                } else {
+                  octokit.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 open and unnasigned issue with the [docathon-h1-2023 label](https://github.com/pytorch/tutorials/issues?q=is%3Aopen+is%3Aissue+label%3Adocathon-h1-2023)."
+                await octokit.issues.createComment({
+                  owner: context.repo.owner,
+                  repo: context.repo.repo,
+                  issue_number: issueNumber,
+                  body: commmentMessage
+                });
+              }
+            }