Add script for automatically creating PRs for user test updates (#24036)

* Draft of script to automatically create user baseline update PRs

* Some modifications to make testing easier

package.json

@@ -29,6 +29,7 @@
         "node": ">=4.2.0"
     },
     "devDependencies": {
+        "@octokit/rest": "latest",
         "@types/browserify": "latest",
         "@types/chai": "latest",
         "@types/convert-source-map": "latest",

scripts/open-user-pr.ts

@@ -0,0 +1,63 @@
+import cp = require("child_process");
+import Octokit = require("@octokit/rest");
+
+const opts = { timeout: 100_000, shell: true, stdio: "inherit" }
+function runSequence(tasks: [string, string[]][]) {
+    for (const task of tasks) {
+        console.log(`${task[0]} ${task[1].join(" ")}`);
+        const result = cp.spawnSync(task[0], task[1], opts);
+        if (result.status !== 0) throw new Error(`${task[0]} ${task[1].join(" ")} failed: ${result.stderr && result.stderr.toString()}`);
+    }
+}
+
+function padNum(number: number) {
+    const str = "" + number;
+    return str.length >= 2 ? str : "0" + str;
+}
+
+const userName = process.env.GH_USERNAME;
+const reviewers = ["weswigham", "sandersn", "mhegazy"]
+const now = new Date();
+const branchName = `user-update-${now.getFullYear()}${padNum(now.getMonth())}${padNum(now.getDay())}`;
+const remoteUrl = `https://github.com/${userName}/TypeScript.git`;
+runSequence([
+    ["git", ["checkout", "."]], // reset any changes
+    ["node", ["./node_modules/jake/bin/cli.js", "baseline-accept"]], // accept baselines
+    ["git", ["checkout", "-b", branchName]], // create a branch
+    ["git", ["add", "."]], // Add all changes
+    ["git", ["commit", "-m", `"Update user baselines"`]], // Commit all changes
+    ["git", ["remote", "add", "fork", remoteUrl]], // Add the remote fork
+    ["git", ["push", "--set-upstream", "fork", branchName]] // push the branch
+]);
+
+const gh = new Octokit();
+gh.authenticate({
+    type: "token",
+    token: process.env.GH_TOKEN
+});
+gh.pullRequests.create({
+    owner: process.env.TARGET_FORK,
+    repo: "TypeScript",
+    maintainer_can_modify: true,
+    title: `🤖 User test baselines have changed`,
+    head: `${userName}:${branchName}`,
+    base: "master",
+    body:
+`Please review the diff and merge if no changes are unexpected.
+
+cc ${reviewers.map(r => "@" + r).join(" ")}`,
+}).then(r => {
+    const num = r.data.number;
+    console.log(`Pull request ${num} created.`);
+    return gh.pullRequests.createReviewRequest({
+        owner: process.env.TARGET_FORK,
+        repo: "TypeScript",
+        number: num,
+        reviewers,
+    });
+}).then(() => {
+    console.log(`Reviewers requested, done.`);
+}).catch(e => {
+    console.error(e);
+    process.exit(1);
+});