Update README.md

.github/actions/branch/action.yml

@@ -0,0 +1,5 @@
+name: 'Branch from fork'
+description: 'creates a branch based off PR from fork'
+runs:
+  using: 'node16'
+  main: 'index.js'

.github/actions/branch/index.js

@@ -0,0 +1,54 @@
+const core = require('@actions/core');
+const github = require('@actions/github');
+
+const octokit = new github.GitHub(process.env.GITHUB_TOKEN);
+run();
+// Creates a branch off a fork PR
+async function run() {
+  const context = github.context;
+  try {
+    // Get info of the fork PR
+    const prNumber = context.issue.number;
+    const {data} = await octokit.pulls.get({
+      ...context.repo,
+      pull_number: prNumber
+    });
+    const branch = `${data.user.login}-${data.head.ref}`;
+    const ref = `refs/heads/${branch}`;
+    const sha = data.merge_commit_sha;
+
+    let res;
+    // Look up if branch for fork PR exists in base repo
+    try {
+      res = await octokit.repos.getBranch({
+        ...context.repo,
+        branch
+      });
+    } catch (error) {
+      if (!(error.name === 'HttpError' && error.status === 404)) {
+        throw error;
+      } else {
+        // If branch doesn't exist for the forked PR, create one so we can get a
+        // build for it and return
+        await octokit.git.createRef({
+          ...context.repo,
+          ref,
+          sha
+        });
+        return;
+      }
+    }
+
+    // If branch already exists update it to match fork PR state.
+    if (res.status === 200) {
+      await octokit.git.updateRef({
+        ...context.repo,
+        sha,
+        ref: `heads/${branch}`,
+        force: true
+      })
+    }
+  } catch (error) {
+    core.setFailed(error.message);
+  }
+}

.github/workflows/pr-comment.yaml

@@ -0,0 +1,27 @@
+name: PR comment
+on: issue_comment
+
+jobs:
+  pr_commented:
+    name: PR comment workflow
+    # TODOs: change the github.repositiory to our actual repo
+    # - change author association to memeber in actual repo (maybe change to something else entirely)
+    if: |
+      github.event.issue.pull_request &&
+      github.repository == 'LFDanLu/react-spectrum' &&
+      github.event.comment.author_association == 'OWNER'
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@main
+      - name: Use Node 16
+        uses: actions/setup-node@v2
+        with:
+          node-version: '16'
+      - name: install
+        # TODO: change to yarn when running in RSP
+        run: yarn install
+      - name: Comment contains trigger
+        if: contains(github.event.comment.body, 'test comment')
+        uses: ./.github/actions/branch
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

README.md

@@ -1,6 +1,7 @@
 #  [React Spectrum Libraries](https://react-spectrum.adobe.com/)
 
-A collection of libraries and tools that help you build adaptive, accessible, and robust user experiences.
+A collection of libraries and tools that help you build adaptive, accessible, and robust user experiences. Dummy commit
+commit 2
 
 ### React Spectrum