From 40d77c56055cca89437b36bb5763a820ef931539 Mon Sep 17 00:00:00 2001
From: Matt Mastracci <matthew@mastracci.com>
Date: Tue, 6 Jun 2023 12:53:41 -0600
Subject: [PATCH] chore(core): build_bench tool (#19387)

This is a quick tool that I've been using to build benchmarking builds
for Deno.

Usage:

Build a benchmark `HEAD~1` and `origin/main` executable:

```sh
deno run tools/build_bench.ts HEAD~1 origin/main
```

Build debug benchmark executables of the last three commits:

```sh
deno run tools/build_bench.ts --profile debug HEAD HEAD~1 HEAD~2
```
---
 tools/build_bench.ts | 136 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 136 insertions(+)
 create mode 100755 tools/build_bench.ts

diff --git a/tools/build_bench.ts b/tools/build_bench.ts
new file mode 100755
index 0000000000..dbbe029677
--- /dev/null
+++ b/tools/build_bench.ts
@@ -0,0 +1,136 @@
+#!/usr/bin/env -S deno run --unstable --allow-env --allow-read --allow-write --allow-run
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
+import $ from "https://deno.land/x/dax@0.32.0/mod.ts";
+
+if (Deno.args.length === 0) {
+  $.log(
+    "Usage: build_bench [-v] [--profile release|debug] commit1 [commit2 [comment3...]]",
+  );
+  Deno.exit(1);
+}
+
+const args = Deno.args.slice();
+let verbose = false;
+if (args[0] == "-v") {
+  args.shift();
+  verbose = true;
+}
+
+let profile = "release";
+if (args[0] == "--profile") {
+  args.shift();
+  profile = args.shift();
+}
+
+function exit(msg: string) {
+  $.logError(msg);
+  Deno.exit(1);
+}
+
+// Make sure the .git dir exists
+const gitDir = Deno.cwd() + "/.git";
+await Deno.stat(gitDir);
+
+async function runCommand(human: string, cmd) {
+  if (verbose) {
+    const out = await cmd.noThrow();
+    if (out.code != 0) {
+      exit(human);
+    }
+  } else {
+    const out = await cmd.stdout("piped").stderr("piped").noThrow();
+    if (out.code != 0) {
+      $.logLight("stdout");
+      $.logGroup();
+      $.log(out.stdout);
+      $.logGroupEnd();
+      $.logLight("stderr");
+      $.logGroup();
+      $.log(out.stderr);
+      $.logGroupEnd();
+      exit(human);
+    }
+  }
+}
+
+async function buildGitCommit(progress, commit) {
+  const tempDir = $.path(await Deno.makeTempDir());
+
+  const gitInfo =
+    await $`git log --pretty=oneline --abbrev-commit -n1 ${commit}`.stdout(
+      "piped",
+    ).stderr("piped").noThrow();
+  if (gitInfo.code != 0) {
+    $.log(gitInfo.stdout);
+    $.log(gitInfo.stderr);
+    exit(`Failed to get git info for commit ${commit}`);
+  }
+
+  const hash = gitInfo.stdout.split(" ")[0];
+  progress.message(`${commit} is ${hash}`);
+
+  progress.message(`clone ${hash}`);
+  await runCommand(
+    `Failed to clone commit ${commit}`,
+    $`git clone ${gitDir} ${tempDir}`,
+  );
+
+  progress.message(`reset ${hash}`);
+  await runCommand(
+    `Failed to reset commit ${commit}`,
+    $`git reset --hard ${hash}`.cwd(tempDir),
+  );
+
+  progress.message(`build ${hash} (please wait)`);
+  const now = Date.now();
+  const interval = setInterval(() => {
+    const elapsed = Math.round((Date.now() - now) / 1000);
+    progress.message(`build ${hash} (${elapsed}s)`);
+  }, 100);
+  try {
+    if (profile === "debug") {
+      await runCommand(
+        `Failed to build commit ${commit}`,
+        $`cargo build`.cwd(tempDir),
+      );
+    } else {
+      await runCommand(
+        `Failed to build commit ${commit}`,
+        $`cargo build --profile ${profile}`.cwd(tempDir),
+      );
+    }
+  } finally {
+    clearInterval(interval);
+  }
+  const elapsed = Math.round((Date.now() - now) / 1000);
+
+  let file;
+  if (profile === "release") {
+    file = `deno-${hash}`;
+  } else {
+    file = `deno-${profile}-${hash}`;
+  }
+  progress.message(`copy ${hash}`);
+  await tempDir.join("target").join(profile).join("deno").copyFile(file);
+
+  progress.message(`cleanup ${hash}`);
+  await tempDir.remove({ recursive: true });
+
+  progress.message("done");
+  $.log(`Built ./${file} (${commit}) in ${elapsed}s: ${gitInfo.stdout}`);
+}
+
+const promises = [];
+for (const arg of args) {
+  if (verbose) {
+    promises.push(buildGitCommit({ message() {} }, arg));
+  } else {
+    const progress = $.progress(`${arg}`);
+    promises.push(progress.with(async () => {
+      await buildGitCommit(progress, arg);
+    }));
+  }
+}
+
+await Promise.all(promises);