chore: automatically update Releases.md when doing a release (#13837)

Co-authored-by: Aaron O'Mullan <aaron.omullan@gmail.com>

tools/cut_a_release.md

@@ -97,10 +97,10 @@ verify on GitHub that everything looks correct.
 9. If you are doing a patch release, answer `y` to the _Increment patch?_
    prompt.
 
-10. Use the output of the above command to update `Releases.md`. **If you are
+10. The above command will update the `Releases.md` file. Review it and ensure
-    cutting a minor release**: make sure that there are no duplicate entries in
+    its output is correct. **If you are cutting a minor release**: make sure
-    previous releases; most often commits with `fix` prefix would have been
+    that there are no duplicate entries in previous releases; most often commits
-    included in patch releases.
+    with `fix` prefix would have been included in patch releases.
 
 11. Update link in `cli/compat/mod.rs` with the released version of `deno_std`
     and do a search through the tests to find std urls that need to be updated.

tools/release/03_bump_cli_version.ts

@@ -1,6 +1,7 @@
 #!/usr/bin/env -S deno run --allow-read --allow-write --allow-run=cargo,git
 // Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
 import { DenoWorkspace } from "./deno_workspace.ts";
+import { path } from "./deps.ts";
 
 const workspace = await DenoWorkspace.load();
 const repo = workspace.repo;
@@ -13,11 +14,23 @@ await cliCrate.promptAndIncrement();
 // update the lock file
 await cliCrate.cargoCheck();
 
-// output the Releases.md markdown text
+// update the Releases.md markdown text
+await updateReleasesMd();
+await workspace.runFormatter();
 console.log(
-  "You may use the following as a template for updating Releases.md:\n",
+  "Updated Release.md -- Please review the output to ensure it's correct.",
 );
-console.log(await getReleasesMdText());
+
+async function updateReleasesMd() {
+  const filePath = path.join(DenoWorkspace.rootDirPath, "Releases.md");
+  const oldFileText = await Deno.readTextFile(filePath);
+  const insertText = await getReleasesMdText();
+
+  await Deno.writeTextFile(
+    filePath,
+    oldFileText.replace(/^### /m, insertText + "\n\n### "),
+  );
+}
 
 async function getReleasesMdText() {
   const gitLog = await repo.getGitLogFromTags(

tools/release/deno_workspace.ts

@@ -67,4 +67,15 @@ export class DenoWorkspace {
   getCrate(name: string) {
     return this.#repo.getCrate(name);
   }
+
+  runFormatter() {
+    return this.#repo.runCommandWithOutput([
+      "deno",
+      "run",
+      "--allow-write",
+      "--allow-read",
+      "--allow-run",
+      "./tools/format.js",
+    ]);
+  }
 }

tools/release/deps.ts

@@ -1,3 +1,3 @@
 // Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
 
-export * from "https://raw.githubusercontent.com/denoland/automation/0.2.0/mod.ts";
+export * from "https://raw.githubusercontent.com/denoland/automation/0.3.0/mod.ts";