40 files changed, 826 insertions, 767 deletions
diff --git a/.github/workflows/bun-linux-build.yml b/.github/workflows/bun-linux-build.yml
index cfe79ef02..39382f22b 100644
--- a/.github/workflows/bun-linux-build.yml
+++ b/.github/workflows/bun-linux-build.yml
@@ -146,38 +146,3 @@ jobs:
           name: "Canary (${{github.sha}})"
           tag: "canary"
           artifacts: "${{runner.temp}}/release/bun-${{matrix.tag}}.zip,${{runner.temp}}/release/bun-${{matrix.tag}}-profile.zip"
-      - id: setup-bun
-        name: Setup Bun
-        uses: oven-sh/setup-bun@v0.1.8
-        if: |
-          github.repository_owner == 'oven-sh'
-          && github.ref == 'refs/heads/main'
-        with:
-          bun-version: canary
-          github-token: ${{ secrets.GITHUB_TOKEN }}
-      # - name: Sign Release
-      #   id: sign-release
-      #   if: |
-      #     github.repository_owner == 'oven-sh'
-      #     && github.ref == 'refs/heads/main'
-      #   env:
-      #     GPG_PASSPHRASE: ${{ secrets.GPG_PASSPHRASE }}
-      #   run: |
-      #     echo "$GPG_PASSPHRASE" | bun run .scripts/sign-release.ts
-      # - name: Release Checksum
-      #   id: release-checksum
-      #   uses: ncipollo/release-action@v1
-      #   if: |
-      #     github.repository_owner == 'oven-sh'
-      #     && github.ref == 'refs/heads/main'
-      #   with:
-      #     prerelease: true
-      #     body: "This canary release of Bun corresponds to the commit [${{ github.sha }}]"
-      #     allowUpdates: true
-      #     replacesArtifacts: true
-      #     generateReleaseNotes: true
-      #     artifactErrorsFailBuild: true
-      #     token: ${{ secrets.GITHUB_TOKEN }}
-      #     name: "Canary (${{github.sha}})"
-      #     tag: "canary"
-      #     artifacts: "SHASUMS256.txt,SHASUMS256.txt.asc"
diff --git a/.github/workflows/bun-mac-aarch64.yml b/.github/workflows/bun-mac-aarch64.yml
index 3b2ce89ca..923f30a5c 100644
--- a/.github/workflows/bun-mac-aarch64.yml
+++ b/.github/workflows/bun-mac-aarch64.yml
@@ -384,38 +384,3 @@ jobs:
           name: "Canary (${{github.sha}})"
           tag: "canary"
           artifacts: "${{runner.temp}}/release/${{matrix.tag}}.zip,${{runner.temp}}/release/${{matrix.tag}}-profile.zip"
-      - id: setup-bun
-        name: Setup Bun
-        uses: oven-sh/setup-bun@v0.1.8
-        if: |
-          github.repository_owner == 'oven-sh'
-          && github.ref == 'refs/heads/main'
-        with:
-          bun-version: canary
-          github-token: ${{ secrets.GITHUB_TOKEN }}
-      # - name: Sign Release
-      #   id: sign-release
-      #   if: |
-      #     github.repository_owner == 'oven-sh'
-      #     && github.ref == 'refs/heads/main'
-      #   env:
-      #     GPG_PASSPHRASE: ${{ secrets.GPG_PASSPHRASE }}
-      #   run: |
-      #     echo "$GPG_PASSPHRASE" | bun run .scripts/sign-release.ts
-      # - name: Release Checksum
-      #   id: release-checksum
-      #   uses: ncipollo/release-action@v1
-      #   if: |
-      #     github.repository_owner == 'oven-sh'
-      #     && github.ref == 'refs/heads/main'
-      #   with:
-      #     prerelease: true
-      #     body: "This canary release of Bun corresponds to the commit [${{ github.sha }}]"
-      #     allowUpdates: true
-      #     replacesArtifacts: true
-      #     generateReleaseNotes: true
-      #     artifactErrorsFailBuild: true
-      #     token: ${{ secrets.GITHUB_TOKEN }}
-      #     name: "Canary (${{github.sha}})"
-      #     tag: "canary"
-      #     artifacts: "SHASUMS256.txt,SHASUMS256.txt.asc"
diff --git a/.github/workflows/bun-mac-x64-baseline.yml b/.github/workflows/bun-mac-x64-baseline.yml
index b7261b7d7..f28d10947 100644
--- a/.github/workflows/bun-mac-x64-baseline.yml
+++ b/.github/workflows/bun-mac-x64-baseline.yml
@@ -388,38 +388,3 @@ jobs:
           name: "Canary (${{github.sha}})"
           tag: "canary"
           artifacts: "${{runner.temp}}/release/${{matrix.tag}}.zip,${{runner.temp}}/release/${{matrix.tag}}-profile.zip"
-      - id: setup-bun
-        name: Setup Bun
-        uses: oven-sh/setup-bun@v0.1.8
-        if: |
-          github.repository_owner == 'oven-sh'
-          && github.ref == 'refs/heads/main'
-        with:
-          bun-version: canary
-          github-token: ${{ secrets.GITHUB_TOKEN }}
-      # - name: Sign Release
-      #   id: sign-release
-      #   if: |
-      #     github.repository_owner == 'oven-sh'
-      #     && github.ref == 'refs/heads/main'
-      #   env:
-      #     GPG_PASSPHRASE: ${{ secrets.GPG_PASSPHRASE }}
-      #   run: |
-      #     echo "$GPG_PASSPHRASE" | bun run .scripts/sign-release.ts
-      # - name: Release Checksum
-      #   id: release-checksum
-      #   uses: ncipollo/release-action@v1
-      #   if: |
-      #     github.repository_owner == 'oven-sh'
-      #     && github.ref == 'refs/heads/main'
-      #   with:
-      #     prerelease: true
-      #     body: "This canary release of Bun corresponds to the commit [${{ github.sha }}]"
-      #     allowUpdates: true
-      #     replacesArtifacts: true
-      #     generateReleaseNotes: true
-      #     artifactErrorsFailBuild: true
-      #     token: ${{ secrets.GITHUB_TOKEN }}
-      #     name: "Canary (${{github.sha}})"
-      #     tag: "canary"
-      #     artifacts: "SHASUMS256.txt,SHASUMS256.txt.asc"
diff --git a/.github/workflows/bun-mac-x64.yml b/.github/workflows/bun-mac-x64.yml
index f094c7b1e..67e07ffe0 100644
--- a/.github/workflows/bun-mac-x64.yml
+++ b/.github/workflows/bun-mac-x64.yml
@@ -390,38 +390,3 @@ jobs:
           name: "Canary (${{github.sha}})"
           tag: "canary"
           artifacts: "${{runner.temp}}/release/${{matrix.tag}}.zip,${{runner.temp}}/release/${{matrix.tag}}-profile.zip"
-      - id: setup-bun
-        name: Setup Bun
-        uses: oven-sh/setup-bun@v0.1.8
-        if: |
-          github.repository_owner == 'oven-sh'
-          && github.ref == 'refs/heads/main'
-        with:
-          bun-version: canary
-          github-token: ${{ secrets.GITHUB_TOKEN }}
-      # - name: Sign Release
-      #   id: sign-release
-      #   if: |
-      #     github.repository_owner == 'oven-sh'
-      #     && github.ref == 'refs/heads/main'
-      #   env:
-      #     GPG_PASSPHRASE: ${{ secrets.GPG_PASSPHRASE }}
-      #   run: |
-      #     echo "$GPG_PASSPHRASE" | bun run .scripts/sign-release.ts
-      # - name: Release Checksum
-      #   id: release-checksum
-      #   uses: ncipollo/release-action@v1
-      #   if: |
-      #     github.repository_owner == 'oven-sh'
-      #     && github.ref == 'refs/heads/main'
-      #   with:
-      #     prerelease: true
-      #     body: "This canary release of Bun corresponds to the commit [${{ github.sha }}]"
-      #     allowUpdates: true
-      #     replacesArtifacts: true
-      #     generateReleaseNotes: true
-      #     artifactErrorsFailBuild: true
-      #     token: ${{ secrets.GITHUB_TOKEN }}
-      #     name: "Canary (${{github.sha}})"
-      #     tag: "canary"
-      #     artifacts: "SHASUMS256.txt,SHASUMS256.txt.asc"
diff --git a/.github/workflows/bun-release.yml b/.github/workflows/bun-release.yml
index 141725379..b25c0d17b 100644
--- a/.github/workflows/bun-release.yml
+++ b/.github/workflows/bun-release.yml
@@ -4,7 +4,6 @@ on:
   release:
     types:
       - published
-      - edited # canary only
   workflow_dispatch:
     inputs:
       tag:
@@ -17,7 +16,7 @@ jobs:
     runs-on: ubuntu-latest
     defaults:
       run:
-        working-directory: packages/bun-npm
+        working-directory: packages/bun-release
     steps:
       - id: checkout
         name: Checkout
@@ -41,7 +40,7 @@ jobs:
         run: bun install
       - id: bun-run
         name: Release
-        run: bun run npm -- "${{ env.TAG }}" publish
+        run: bun upload-npm -- "${{ env.TAG }}" publish
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           NPM_TOKEN: ${{ secrets.NPM_TOKEN }}
@@ -73,7 +72,6 @@ jobs:
         uses: docker/metadata-action@v4
         with:
           images: oven/bun
-          flavor: latest=false # TODO
           tags: |
             type=match,pattern=(bun-v)?(canary|\d.\d.\d),group=2,value=${{ env.TAG }}
             type=match,pattern=(bun-v)?(canary|\d.\d.\d),group=2,value=${{ env.TAG }}
diff --git a/.scripts/sign-release.ts b/.scripts/sign-release.ts
deleted file mode 100644
index 9ff189659..000000000
--- a/.scripts/sign-release.ts
+++ /dev/null
@@ -1,93 +0,0 @@
-/// <reference types="bun-types" />
-import { SHA256, which, write, spawnSync } from "bun";
-import { isatty } from "node:tty";
-import { createInterface } from "node:readline";
-
-const tag = process.argv[2];
-const url = tag
-  ? `https://api.github.com/repos/oven-sh/bun/releases/tags/${tag}`
-  : "https://api.github.com/repos/oven-sh/bun/releases/latest";
-const response = await fetch(url);
-if (response.status === 404) {
-  throw new Error(`Release not found: ${tag}`);
-}
-if (!response.ok) {
-  throw new Error(`Failed to find release: ${tag} [status: ${response.status}]`);
-}
-const release: any = await response.json();
-if (release.assets.find(({ name }) => name === "SHA256SUMS.txt.asc")) {
-  throw new Error(`Release already signed: ${tag}`);
-}
-const sha256s = await Promise.all(
-  release.assets.map(async ({ name, browser_download_url }) => {
-    return `${await sha256(browser_download_url)}  ${name}`;
-  }),
-);
-await write("SHASUMS256.txt", sha256s.join("\n"));
-await sign("SHASUMS256.txt");
-
-async function sha256(url: string): Promise<string> {
-  const response = await fetch(url);
-  if (!response.ok) {
-    throw new Error(`Failed to find asset: ${url} [status: ${response.status}]`);
-  }
-  const body = await response.arrayBuffer();
-  const sha256 = SHA256.hash(body);
-  return Buffer.from(sha256).toString("hex");
-}
-
-async function sign(path: string): Promise<void> {
-  // https://www.gnupg.org/gph/en/manual/x135.html
-  if (!which("gpg")) {
-    throw new Error("Command not found: gpg");
-  }
-  const { stdout } = spawnSync(
-    [
-      "gpg",
-      "--list-secret-keys",
-      "--keyid-format",
-      "long"
-    ],
-    {
-      stdout: "pipe",
-      stderr: "pipe",
-    }
-  );
-  if (!stdout.includes("F3DCC08A8572C0749B3E18888EAB4D40A7B22B59")) {
-    console.warn("Signature is likely wrong, key not found: robobun@oven.sh");
-  }
-  const passphrase = await prompt("Passphrase:");
-  spawnSync(
-    [
-      "gpg",
-      "--batch",
-      "--yes",
-      "--clearsign",
-      "--output",
-      `${path}.asc`,
-      path
-    ],
-    {
-      stdin: new TextEncoder().encode(passphrase),
-      stdout: "inherit",
-      stderr: "inherit",
-    }
-  );
-}
-
-async function prompt(question: string): Promise<string> {
-  if (isatty(process.stdout.fd)) {
-    return globalThis.prompt(question) || "";
-  }
-  const reader = createInterface({
-    input: process.stdin,
-    terminal: false
-  });
-  let buffer = "";
-  reader.on("line", (line) => {
-    buffer += line;
-  });
-  return new Promise((resolve) => {
-    reader.once("close", () => resolve(buffer));
-  });
-}
diff --git a/packages/bun-npm/bun.lockb b/packages/bun-npm/bun.lockb
deleted file mode 100755
index 41a60a1ec..000000000
--- a/packages/bun-npm/bun.lockb
+++ /dev/null
diff --git a/packages/bun-npm/scripts/npm-build.ts b/packages/bun-npm/scripts/npm-build.ts
deleted file mode 100644
index 9f3547565..000000000
--- a/packages/bun-npm/scripts/npm-build.ts
+++ /dev/null
@@ -1,256 +0,0 @@
-import type { Endpoints } from "@octokit/types";
-import { copy, exists, fetch, spawn } from "../src/util";
-import type { JSZipObject } from "jszip";
-import { loadAsync } from "jszip";
-import { join } from "node:path";
-import { chmod, read, write } from "../src/util";
-import type { BuildOptions } from "esbuild";
-import { buildSync, formatMessagesSync } from "esbuild";
-import type { Platform } from "../src/platform";
-import { platforms } from "../src/platform";
-
-type Release =
-  Endpoints["GET /repos/{owner}/{repo}/releases/latest"]["response"]["data"];
-
-const npmPackage = "bun";
-const npmOwner = "@oven";
-let npmVersion: string;
-
-const [tag, action] = process.argv.slice(2);
-
-await build(tag);
-if (action === "publish") {
-  await publish();
-} else if (action === "dry-run") {
-  await publish(true);
-} else if (action) {
-  throw new Error(`Unknown action: ${action}`);
-}
-
-async function build(version: string): Promise<void> {
-  const release = await getRelease(version);
-  if (release.tag_name === "canary") {
-    npmVersion = await getCanaryVersion();
-  } else {
-    npmVersion = release.tag_name.replace("bun-v", "");
-  }
-  await buildBasePackage();
-  for (const platform of platforms) {
-    await buildPackage(release, platform);
-  }
-}
-
-async function publish(dryRun?: boolean): Promise<void> {
-  const npmPackages = platforms.map(({ bin }) => `${npmOwner}/${bin}`);
-  npmPackages.push(npmPackage);
-  for (const npmPackage of npmPackages) {
-    publishPackage(npmPackage, dryRun);
-  }
-}
-
-async function buildBasePackage() {
-  const done = log("Building:", `${npmPackage}@${npmVersion}`);
-  const cwd = join("npm", npmPackage);
-  const define = {
-    npmVersion: `"${npmVersion}"`,
-    npmPackage: `"${npmPackage}"`,
-    npmOwner: `"${npmOwner}"`,
-  };
-  buildJs(join("scripts", "npm-postinstall.ts"), join(cwd, "install.js"), {
-    define,
-  });
-  buildJs(join("scripts", "npm-exec.ts"), join(cwd, "bin", "bun"), {
-    define,
-    banner: {
-      js: "#!/usr/bin/env node",
-    },
-  });
-  const os = [...new Set(platforms.map(({ os }) => os))];
-  const cpu = [...new Set(platforms.map(({ arch }) => arch))];
-  patchJson(join(cwd, "package.json"), {
-    name: npmPackage,
-    version: npmVersion,
-    scripts: {
-      postinstall: "node install.js",
-    },
-    optionalDependencies: Object.fromEntries(
-      platforms.map(({ bin }) => [`${npmOwner}/${bin}`, npmVersion]),
-    ),
-    bin: {
-      bun: "bin/bun",
-      bunx: "bin/bun",
-    },
-    os,
-    cpu,
-  });
-  if (exists(".npmrc")) {
-    copy(".npmrc", join(cwd, ".npmrc"));
-  }
-  done();
-}
-
-async function buildPackage(
-  release: Release,
-  { bin, exe, os, arch }: Platform,
-): Promise<void> {
-  const npmPackage = `${npmOwner}/${bin}`;
-  const done = log("Building:", `${npmPackage}@${npmVersion}`);
-  const asset = release.assets.find(({ name }) => name === `${bin}.zip`);
-  if (!asset) {
-    console.warn(`No asset found: ${bin}`);
-    return;
-  }
-  const bun = await extractFromZip(asset.browser_download_url, `${bin}/bun`);
-  const cwd = join("npm", npmPackage);
-  write(join(cwd, exe), await bun.async("arraybuffer"));
-  chmod(join(cwd, exe), 0o755);
-  patchJson(join(cwd, "package.json"), {
-    name: npmPackage,
-    version: npmVersion,
-    preferUnplugged: true,
-    os: [os],
-    cpu: [arch],
-  });
-  if (exists(".npmrc")) {
-    copy(".npmrc", join(cwd, ".npmrc"));
-  }
-  done();
-}
-
-function publishPackage(name: string, dryRun?: boolean): void {
-  const done = log(
-    dryRun ? "Dry-run Publishing:" : "Publishing:",
-    `${name}@${npmVersion}`,
-  );
-  const { exitCode, stdout, stderr } = spawn(
-    "npm",
-    [
-      "publish",
-      "--access",
-      "public",
-      "--tag",
-      npmVersion.includes("canary") ? "canary" : "latest",
-      ...(dryRun ? ["--dry-run"] : []),
-    ],
-    {
-      cwd: join("npm", name),
-    },
-  );
-  if (exitCode === 0) {
-    done();
-    return;
-  }
-  console.warn(stdout || stderr);
-}
-
-async function extractFromZip(
-  url: string,
-  filename: string,
-): Promise<JSZipObject> {
-  const response = await fetch(url);
-  const buffer = await response.arrayBuffer();
-  const zip = await loadAsync(buffer);
-  for (const [name, file] of Object.entries(zip.files)) {
-    if (!file.dir && name.startsWith(filename)) {
-      return file;
-    }
-  }
-  console.warn("Found files:", Object.keys(zip.files));
-  throw new Error(`File not found: ${filename}`);
-}
-
-async function getRelease(version?: string | null): Promise<Release> {
-  const response = await fetchGithub(
-    version ? `releases/tags/${formatTag(version)}` : `releases/latest`,
-  );
-  return response.json();
-}
-
-async function getSha(version: string): Promise<string> {
-  const response = await fetchGithub(`git/ref/tags/${formatTag(version)}`);
-  const {
-    object,
-  }: Endpoints["GET /repos/{owner}/{repo}/git/ref/{ref}"]["response"]["data"] =
-    await response.json();
-  return object.sha.substring(0, 7);
-}
-
-async function fetchGithub(path: string) {
-  const headers = new Headers();
-  const token = process.env.GITHUB_TOKEN;
-  if (token) {
-    headers.set("Authorization", `Bearer ${token}`);
-  }
-  const url = new URL(path, "https://api.github.com/repos/oven-sh/bun/");
-  return fetch(url.toString());
-}
-
-async function getCanaryVersion(): Promise<string> {
-  const date = new Date().toISOString().split("T")[0].replace(/-/g, "");
-  const semver = `${Bun.version}-canary.${date}`;
-  try {
-    const sha = await getSha("canary");
-    const response = await fetch(
-      `https://registry.npmjs.org/-/package/${npmPackage}/dist-tags`,
-    );
-    const { canary }: { canary: string } = await response.json();
-    if (canary.startsWith(semver)) {
-      const match = /canary.[0-9]{8}\.([0-9]+)+?/.exec(canary);
-      const build = 1 + (match ? parseInt(match[1]) : 0);
-      return `${semver}.${build}+${sha}`;
-    }
-    return `${semver}.1+${sha}`;
-  } catch (error) {
-    console.warn("Failed to calculate canary version", error);
-  }
-  return `${semver}.1`;
-}
-
-function formatTag(version: string): string {
-  if (version.includes("canary") || version.startsWith("bun-v")) {
-    return version;
-  }
-  return `bun-v${version}`;
-}
-
-function patchJson(path: string, patch: object): void {
-  let value;
-  try {
-    const existing = JSON.parse(read(path));
-    value = {
-      ...existing,
-      ...patch,
-    };
-  } catch {
-    value = patch;
-  }
-  write(path, `${JSON.stringify(value, undefined, 2)}\n`);
-}
-
-function buildJs(src: string, dst: string, options: BuildOptions = {}): void {
-  const { errors } = buildSync({
-    bundle: true,
-    treeShaking: true,
-    keepNames: true,
-    minifySyntax: true,
-    pure: ["console.debug"],
-    platform: "node",
-    target: "es6",
-    format: "cjs",
-    entryPoints: [src],
-    outfile: dst,
-    ...options,
-  });
-  if (errors?.length) {
-    const messages = formatMessagesSync(errors, { kind: "error" });
-    throw new Error(messages.join("\n"));
-  }
-}
-
-function log(...args: any[]): () => void {
-  console.write(Bun.inspect(...args));
-  const start = Date.now();
-  return () => {
-    console.write(` [${(Date.now() - start).toFixed()} ms]\n`);
-  };
-}
diff --git a/packages/bun-npm/src/util.ts b/packages/bun-npm/src/util.ts
deleted file mode 100644
index e2cf19ee0..000000000
--- a/packages/bun-npm/src/util.ts
+++ /dev/null
@@ -1,212 +0,0 @@
-import fs from "fs";
-import path, { dirname } from "path";
-import { tmpdir } from "os";
-import child_process from "child_process";
-
-if (process.env["DEBUG"] !== "1") {
-  console.debug = () => {};
-}
-
-export function join(...paths: (string | string[])[]): string {
-  return path.join(...paths.flat(2));
-}
-
-export function tmp(): string {
-  const path = fs.mkdtempSync(join(tmpdir(), "bun-"));
-  console.debug("tmp", path);
-  return path;
-}
-
-export function rm(path: string): void {
-  console.debug("rm", path);
-  try {
-    fs.rmSync(path, { recursive: true });
-    return;
-  } catch (error) {
-    console.debug("rmSync failed", error);
-    // Did not exist before Node.js v14.
-    // Attempt again with older, slower implementation.
-  }
-  let stats: fs.Stats;
-  try {
-    stats = fs.lstatSync(path);
-  } catch (error) {
-    console.debug("lstatSync failed", error);
-    // The file was likely deleted, so return early.
-    return;
-  }
-  if (!stats.isDirectory()) {
-    fs.unlinkSync(path);
-    return;
-  }
-  try {
-    fs.rmdirSync(path, { recursive: true });
-    return;
-  } catch (error) {
-    console.debug("rmdirSync failed", error);
-    // Recursive flag did not exist before Node.js X.
-    // Attempt again with older, slower implementation.
-  }
-  for (const filename of fs.readdirSync(path)) {
-    rm(join(path, filename));
-  }
-  fs.rmdirSync(path);
-}
-
-export function rename(path: string, newPath: string): void {
-  console.debug("rename", path, newPath);
-  try {
-    fs.renameSync(path, newPath);
-    return;
-  } catch (error) {
-    console.debug("renameSync failed", error);
-    // If there is an error, delete the new path and try again.
-  }
-  try {
-    rm(newPath);
-  } catch (error) {
-    console.debug("rm failed", error);
-    // The path could have been deleted already.
-  }
-  fs.renameSync(path, newPath);
-}
-
-export function write(
-  path: string,
-  content: string | ArrayBuffer | ArrayBufferView,
-): void {
-  console.debug("write", path);
-  try {
-    fs.writeFileSync(path, content);
-    return;
-  } catch (error) {
-    console.debug("writeFileSync failed", error);
-    // If there is an error, ensure the parent directory
-    // exists and try again.
-    try {
-      fs.mkdirSync(dirname(path), { recursive: true });
-    } catch (error) {
-      console.debug("mkdirSync failed", error);
-      // The directory could have been created already.
-    }
-    fs.writeFileSync(path, content);
-  }
-}
-
-export function read(path: string): string {
-  console.debug("read", path);
-  return fs.readFileSync(path, "utf-8");
-}
-
-export function chmod(path: string, mode: fs.Mode): void {
-  console.debug("chmod", path, mode);
-  fs.chmodSync(path, mode);
-}
-
-export function copy(path: string, newPath: string): void {
-  console.debug("copy", path, newPath);
-  try {
-    fs.copyFileSync(path, newPath);
-    return;
-  } catch (error) {
-    console.debug("copyFileSync failed", error);
-  }
-  write(newPath, read(path));
-}
-
-export function exists(path: string): boolean {
-  console.debug("exists", path);
-  try {
-    return fs.existsSync(path);
-  } catch (error) {
-    console.debug("existsSync failed", error);
-  }
-  return false;
-}
-
-export function spawn(
-  cmd: string,
-  args: string[],
-  options: child_process.SpawnOptions = {},
-): {
-  exitCode: number;
-  stdout: string;
-  stderr: string;
-} {
-  console.debug("spawn", [cmd, ...args].join(" "));
-  const { status, stdout, stderr } = child_process.spawnSync(cmd, args, {
-    stdio: "pipe",
-    encoding: "utf-8",
-    ...options,
-  });
-  return {
-    exitCode: status ?? 1,
-    stdout,
-    stderr,
-  };
-}
-
-export type Response = {
-  readonly status: number;
-  arrayBuffer(): Promise<ArrayBuffer>;
-  json<T>(): Promise<T>;
-};
-
-export const fetch = "fetch" in globalThis ? webFetch : nodeFetch;
-
-async function webFetch(url: string, assert?: boolean): Promise<Response> {
-  const response = await globalThis.fetch(url);
-  console.debug("fetch", url, response.status);
-  if (assert !== false && !isOk(response.status)) {
-    throw new Error(`${response.status}: ${url}`);
-  }
-  return response;
-}
-
-async function nodeFetch(url: string, assert?: boolean): Promise<Response> {
-  const { get } = await import("node:http");
-  return new Promise((resolve, reject) => {
-    get(url, (response) => {
-      console.debug("get", url, response.statusCode);
-      const status = response.statusCode ?? 501;
-      if (response.headers.location && isRedirect(status)) {
-        return nodeFetch(url).then(resolve, reject);
-      }
-      if (assert !== false && !isOk(status)) {
-        return reject(new Error(`${status}: ${url}`));
-      }
-      const body: Buffer[] = [];
-      response.on("data", (chunk) => {
-        body.push(chunk);
-      });
-      response.on("end", () => {
-        resolve({
-          status,
-          async arrayBuffer() {
-            return Buffer.concat(body).buffer as ArrayBuffer;
-          },
-          async json() {
-            const text = Buffer.concat(body).toString("utf-8");
-            return JSON.parse(text);
-          },
-        });
-      });
-    }).on("error", reject);
-  });
-}
-
-function isOk(status: number): boolean {
-  return status === 200;
-}
-
-function isRedirect(status: number): boolean {
-  switch (status) {
-    case 301: // Moved Permanently
-    case 308: // Permanent Redirect
-    case 302: // Found
-    case 307: // Temporary Redirect
-    case 303: // See Other
-      return true;
-  }
-  return false;
-}
diff --git a/packages/bun-npm/.gitignore b/packages/bun-release/.gitignore
index 4c021cb09..4c021cb09 100644
--- a/packages/bun-npm/.gitignore
+++ b/packages/bun-release/.gitignore
diff --git a/packages/bun-npm/.npmrc b/packages/bun-release/.npmrc
index aa0ab1f07..aa0ab1f07 100644
--- a/packages/bun-npm/.npmrc
+++ b/packages/bun-release/.npmrc
diff --git a/packages/bun-npm/README.md b/packages/bun-release/README.md
index 4556f0f4d..9a01bdbfd 100644
--- a/packages/bun-npm/README.md
+++ b/packages/bun-release/README.md
@@ -1,6 +1,6 @@
-# bun-npm
+# bun-release
 
-Scripts that allow Bun to be installed with `npm install`.
+Scripts that release Bun to npm, Dockerhub, Homebrew, etc.
 
 ### Running
 
diff --git a/packages/bun-release/bun.lockb b/packages/bun-release/bun.lockb
new file mode 100755
index 000000000..df506ae60
--- /dev/null
+++ b/packages/bun-release/bun.lockb
diff --git a/packages/bun-npm/npm/@oven/bun-darwin-aarch64/README.md b/packages/bun-release/npm/@oven/bun-darwin-aarch64/README.md
index 3b03fdd9f..3b03fdd9f 100644
--- a/packages/bun-npm/npm/@oven/bun-darwin-aarch64/README.md
+++ b/packages/bun-release/npm/@oven/bun-darwin-aarch64/README.md
diff --git a/packages/bun-npm/npm/@oven/bun-darwin-aarch64/package.json b/packages/bun-release/npm/@oven/bun-darwin-aarch64/package.json
index 46da9b168..701f4c92b 100644
--- a/packages/bun-npm/npm/@oven/bun-darwin-aarch64/package.json
+++ b/packages/bun-release/npm/@oven/bun-darwin-aarch64/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@oven/bun-darwin-aarch64",
-  "version": "0.5.1",
+  "version": "0.5.3",
   "description": "This is the macOS arm64 binary for Bun, a fast all-in-one JavaScript runtime.",
   "homepage": "https://bun.sh",
   "bugs": "https://github.com/oven-sh/issues",
diff --git a/packages/bun-npm/npm/@oven/bun-darwin-x64-baseline/README.md b/packages/bun-release/npm/@oven/bun-darwin-x64-baseline/README.md
index e451cccfe..e451cccfe 100644
--- a/packages/bun-npm/npm/@oven/bun-darwin-x64-baseline/README.md
+++ b/packages/bun-release/npm/@oven/bun-darwin-x64-baseline/README.md
diff --git a/packages/bun-npm/npm/@oven/bun-darwin-x64-baseline/package.json b/packages/bun-release/npm/@oven/bun-darwin-x64-baseline/package.json
index a9a330f42..b14492c1c 100644
--- a/packages/bun-npm/npm/@oven/bun-darwin-x64-baseline/package.json
+++ b/packages/bun-release/npm/@oven/bun-darwin-x64-baseline/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@oven/bun-darwin-x64-baseline",
-  "version": "0.5.1",
+  "version": "0.5.3",
   "description": "This is the macOS x64 binary for Bun, a fast all-in-one JavaScript runtime.",
   "homepage": "https://bun.sh",
   "bugs": "https://github.com/oven-sh/issues",
diff --git a/packages/bun-npm/npm/@oven/bun-darwin-x64/README.md b/packages/bun-release/npm/@oven/bun-darwin-x64/README.md
index be73fd7a2..be73fd7a2 100644
--- a/packages/bun-npm/npm/@oven/bun-darwin-x64/README.md
+++ b/packages/bun-release/npm/@oven/bun-darwin-x64/README.md
diff --git a/packages/bun-npm/npm/@oven/bun-darwin-x64/package.json b/packages/bun-release/npm/@oven/bun-darwin-x64/package.json
index d83283425..82934da0a 100644
--- a/packages/bun-npm/npm/@oven/bun-darwin-x64/package.json
+++ b/packages/bun-release/npm/@oven/bun-darwin-x64/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@oven/bun-darwin-x64",
-  "version": "0.5.1",
+  "version": "0.5.3",
   "description": "This is the macOS x64 binary for Bun, a fast all-in-one JavaScript runtime.",
   "homepage": "https://bun.sh",
   "bugs": "https://github.com/oven-sh/issues",
diff --git a/packages/bun-npm/npm/@oven/bun-linux-aarch64/README.md b/packages/bun-release/npm/@oven/bun-linux-aarch64/README.md
index e727d8008..e727d8008 100644
--- a/packages/bun-npm/npm/@oven/bun-linux-aarch64/README.md
+++ b/packages/bun-release/npm/@oven/bun-linux-aarch64/README.md
diff --git a/packages/bun-npm/npm/@oven/bun-linux-aarch64/package.json b/packages/bun-release/npm/@oven/bun-linux-aarch64/package.json
index c2feaf708..4f68fec41 100644
--- a/packages/bun-npm/npm/@oven/bun-linux-aarch64/package.json
+++ b/packages/bun-release/npm/@oven/bun-linux-aarch64/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@oven/bun-linux-aarch64",
-  "version": "0.5.1",
+  "version": "0.5.3",
   "description": "This is the Linux arm64 binary for Bun, a fast all-in-one JavaScript runtime.",
   "homepage": "https://bun.sh",
   "bugs": "https://github.com/oven-sh/issues",
diff --git a/packages/bun-npm/npm/@oven/bun-linux-x64-baseline/README.md b/packages/bun-release/npm/@oven/bun-linux-x64-baseline/README.md
index 6b2ce0fcf..6b2ce0fcf 100644
--- a/packages/bun-npm/npm/@oven/bun-linux-x64-baseline/README.md
+++ b/packages/bun-release/npm/@oven/bun-linux-x64-baseline/README.md
diff --git a/packages/bun-npm/npm/@oven/bun-linux-x64-baseline/package.json b/packages/bun-release/npm/@oven/bun-linux-x64-baseline/package.json
index e3333b134..1767be0dc 100644
--- a/packages/bun-npm/npm/@oven/bun-linux-x64-baseline/package.json
+++ b/packages/bun-release/npm/@oven/bun-linux-x64-baseline/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@oven/bun-linux-x64-baseline",
-  "version": "0.5.1",
+  "version": "0.5.3",
   "description": "This is the Linux x64 binary for Bun, a fast all-in-one JavaScript runtime.",
   "homepage": "https://bun.sh",
   "bugs": "https://github.com/oven-sh/issues",
diff --git a/packages/bun-npm/npm/@oven/bun-linux-x64/README.md b/packages/bun-release/npm/@oven/bun-linux-x64/README.md
index e0fac1347..e0fac1347 100644
--- a/packages/bun-npm/npm/@oven/bun-linux-x64/README.md
+++ b/packages/bun-release/npm/@oven/bun-linux-x64/README.md
diff --git a/packages/bun-npm/npm/@oven/bun-linux-x64/package.json b/packages/bun-release/npm/@oven/bun-linux-x64/package.json
index 71228ad14..16f9309f5 100644
--- a/packages/bun-npm/npm/@oven/bun-linux-x64/package.json
+++ b/packages/bun-release/npm/@oven/bun-linux-x64/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@oven/bun-linux-x64",
-  "version": "0.5.1",
+  "version": "0.5.3",
   "description": "This is the Linux x64 binary for Bun, a fast all-in-one JavaScript runtime.",
   "homepage": "https://bun.sh",
   "bugs": "https://github.com/oven-sh/issues",
diff --git a/packages/bun-npm/npm/bun/README.md b/packages/bun-release/npm/bun/README.md
index f344b258e..f344b258e 100644
--- a/packages/bun-npm/npm/bun/README.md
+++ b/packages/bun-release/npm/bun/README.md
diff --git a/packages/bun-npm/npm/bun/package.json b/packages/bun-release/npm/bun/package.json
index caf298447..374518b85 100644
--- a/packages/bun-npm/npm/bun/package.json
+++ b/packages/bun-release/npm/bun/package.json
@@ -1,6 +1,6 @@
 {
   "name": "bun",
-  "version": "0.5.1",
+  "version": "0.5.3",
   "description": "Bun is a fast all-in-one JavaScript runtime.",
   "keywords": [
     "bun",
@@ -24,12 +24,12 @@
     "postinstall": "node install.js"
   },
   "optionalDependencies": {
-    "@oven/bun-darwin-aarch64": "0.5.1",
-    "@oven/bun-darwin-x64": "0.5.1",
-    "@oven/bun-darwin-x64-baseline": "0.5.1",
-    "@oven/bun-linux-aarch64": "0.5.1",
-    "@oven/bun-linux-x64": "0.5.1",
-    "@oven/bun-linux-x64-baseline": "0.5.1"
+    "@oven/bun-darwin-aarch64": "0.5.3",
+    "@oven/bun-darwin-x64": "0.5.3",
+    "@oven/bun-darwin-x64-baseline": "0.5.3",
+    "@oven/bun-linux-aarch64": "0.5.3",
+    "@oven/bun-linux-x64": "0.5.3",
+    "@oven/bun-linux-x64-baseline": "0.5.3"
   },
   "os": [
     "darwin",
diff --git a/packages/bun-npm/package.json b/packages/bun-release/package.json
index 33de39c3c..6c28a229f 100644
--- a/packages/bun-npm/package.json
+++ b/packages/bun-release/package.json
@@ -1,15 +1,18 @@
 {
   "private": true,
-  "dependencies": {},
+  "dependencies": {
+    "@octokit/rest": "^19.0.7",
+    "esbuild": "^0.17.3",
+    "jszip": "^3.10.1"
+  },
   "devDependencies": {
     "@octokit/types": "^8.1.1",
     "bun-types": "^0.4.0",
-    "prettier": "^2.8.2",
-    "esbuild": "^0.17.3",
-    "jszip": "^3.10.1"
+    "prettier": "^2.8.2"
   },
   "scripts": {
     "format": "prettier --write src scripts",
-    "npm": "bun scripts/npm-build.ts"
+    "upload-npm": "bun scripts/upload-npm.ts",
+    "upload-assets": "bun scripts/upload-assets.ts"
   }
 }
diff --git a/packages/bun-npm/scripts/npm-exec.ts b/packages/bun-release/scripts/npm-exec.ts
index 3937247cb..5b054ac86 100644
--- a/packages/bun-npm/scripts/npm-exec.ts
+++ b/packages/bun-release/scripts/npm-exec.ts
@@ -1,4 +1,4 @@
-import { importBun } from "../src/install";
+import { importBun } from "../src/npm/install";
 import { execFileSync } from "child_process";
 
 importBun()
diff --git a/packages/bun-npm/scripts/npm-postinstall.ts b/packages/bun-release/scripts/npm-postinstall.ts
index c22f2c669..bde044300 100644
--- a/packages/bun-npm/scripts/npm-postinstall.ts
+++ b/packages/bun-release/scripts/npm-postinstall.ts
@@ -1,4 +1,4 @@
-import { importBun, optimizeBun } from "../src/install";
+import { importBun, optimizeBun } from "../src/npm/install";
 
 importBun()
   .then((path) => {
diff --git a/packages/bun-release/scripts/upload-assets.ts b/packages/bun-release/scripts/upload-assets.ts
new file mode 100644
index 000000000..27b7ba01a
--- /dev/null
+++ b/packages/bun-release/scripts/upload-assets.ts
@@ -0,0 +1,113 @@
+import { getRelease, uploadAsset } from "../src/github";
+import { fetch } from "../src/fetch";
+import { spawn } from "../src/spawn";
+import { confirm, exit, log, stdin, warn } from "../src/console";
+import { hash, join, rm, tmp, write, basename, blob } from "../src/fs";
+
+const [tag, ...paths] = process.argv.slice(2);
+
+if (!tag) {
+  exit("Invalid arguments: [tag] [...assets]");
+}
+
+const { tag_name, assets } = await getRelease(tag);
+log("Release:", tag_name, "\n");
+log("Existing assets:\n", ...assets.map(({ name }) => `- ${name}\n`));
+log("Updating assets:\n", ...paths.map((path) => `+ ${basename(path)}\n`));
+await confirm();
+
+log("Hashing assets...\n");
+const existing: Map<string, string> = new Map();
+for (const { name, browser_download_url } of assets) {
+  if (name.startsWith("SHASUMS256.txt")) {
+    continue;
+  }
+  const response = await fetch(browser_download_url);
+  const buffer = Buffer.from(await response.arrayBuffer());
+  existing.set(name, await hash(buffer));
+}
+const updated: Map<string, string> = new Map();
+for (const path of paths) {
+  const name = basename(path);
+  updated.set(name, await hash(path));
+}
+log(
+  "Unchanged hashes:\n",
+  ...Array.from(existing.entries())
+    .filter(([name]) => !updated.has(name))
+    .map(([name, sha256]) => ` - ${sha256} => ${name}\n`),
+);
+log(
+  "Changed hashes:\n",
+  ...Array.from(updated.entries()).map(
+    ([name, sha256]) => ` + ${sha256} => ${name}\n`,
+  ),
+);
+await confirm();
+
+log("Signing assets...\n");
+const cwd = tmp();
+const path = join(cwd, "SHASUMS256.txt");
+const signedPath = `${path}.asc`;
+write(
+  path,
+  [
+    ...Array.from(updated.entries()),
+    ...Array.from(existing.entries()).filter(([name]) => !updated.has(name)),
+  ]
+    .sort(([a], [b]) => a.localeCompare(b))
+    .map(([name, sha256]) => `${sha256}  ${name}`)
+    .join("\n"),
+);
+const { stdout: keys } = spawn("gpg", [
+  "--list-secret-keys",
+  "--keyid-format",
+  "long",
+]);
+const verifiedKeys = [
+  "F3DCC08A8572C0749B3E18888EAB4D40A7B22B59", // robobun@oven.sh
+];
+if (!verifiedKeys.find((key) => keys.includes(key))) {
+  warn("Signature is probably wrong, key not found: robobun@oven.sh");
+}
+const passphrase = await stdin("Passphrase:");
+log();
+const { exitCode, stdout, stderr } = spawn(
+  "gpg",
+  [
+    "--pinentry-mode",
+    "loopback",
+    "--passphrase-fd",
+    "0",
+    "--clearsign",
+    "--output",
+    signedPath,
+    path,
+  ],
+  {
+    // @ts-ignore
+    input: passphrase,
+    stdout: "inherit",
+    stderr: "inherit",
+  },
+);
+if (exitCode !== 0) {
+  exit(stdout || stderr);
+}
+
+const uploads = [...paths, path, signedPath];
+log("Uploading assets:\n", ...uploads.map((path) => ` + ${basename(path)}\n`));
+await confirm();
+
+for (const path of uploads) {
+  const name = basename(path);
+  await uploadAsset(tag_name, name, blob(path));
+}
+try {
+  rm(cwd);
+} catch {
+  warn("Failed to cleanup:", cwd, "\n");
+}
+log("Done");
+
+process.exit(0); // FIXME
diff --git a/packages/bun-release/scripts/upload-npm.ts b/packages/bun-release/scripts/upload-npm.ts
new file mode 100644
index 000000000..8309d7e57
--- /dev/null
+++ b/packages/bun-release/scripts/upload-npm.ts
@@ -0,0 +1,191 @@
+import { join, copy, exists, chmod, write, writeJson } from "../src/fs";
+import { fetch } from "../src/fetch";
+import { spawn } from "../src/spawn";
+import type { Platform } from "../src/platform";
+import { platforms } from "../src/platform";
+import { getSemver } from "../src/github";
+import { getRelease } from "../src/github";
+import type { BuildOptions } from "esbuild";
+import { buildSync, formatMessagesSync } from "esbuild";
+import type { JSZipObject } from "jszip";
+import { loadAsync } from "jszip";
+import { debug, log, error } from "../src/console";
+
+const module = "bun";
+const owner = "@oven";
+let version: string;
+
+const [tag, action] = process.argv.slice(2);
+
+await build(tag);
+if (action === "publish") {
+  await publish();
+} else if (action === "dry-run") {
+  await publish(true);
+} else if (action) {
+  throw new Error(`Unknown action: ${action}`);
+}
+process.exit(0); // HACK
+
+async function build(tag?: string): Promise<void> {
+  const release = await getRelease(tag);
+  if (release.tag_name === "canary") {
+    version = await getCanarySemver();
+  } else {
+    version = release.tag_name.replace("bun-v", "");
+  }
+  await buildRootModule();
+  for (const platform of platforms) {
+    await buildModule(release, platform);
+  }
+}
+
+async function publish(dryRun?: boolean): Promise<void> {
+  const modules = platforms.map(({ bin }) => `${owner}/${bin}`);
+  modules.push(module);
+  for (const module of modules) {
+    publishModule(module, dryRun);
+  }
+}
+
+async function buildRootModule() {
+  log("Building:", `${module}@${version}`);
+  const cwd = join("npm", module);
+  const define = {
+    version: `"${version}"`,
+    module: `"${module}"`,
+    owner: `"${owner}"`,
+  };
+  bundle(join("scripts", "npm-postinstall.ts"), join(cwd, "install.js"), {
+    define,
+  });
+  bundle(join("scripts", "npm-exec.ts"), join(cwd, "bin", "bun"), {
+    define,
+    banner: {
+      js: "#!/usr/bin/env node",
+    },
+  });
+  const os = [...new Set(platforms.map(({ os }) => os))];
+  const cpu = [...new Set(platforms.map(({ arch }) => arch))];
+  writeJson(join(cwd, "package.json"), {
+    name: module,
+    version: version,
+    scripts: {
+      postinstall: "node install.js",
+    },
+    optionalDependencies: Object.fromEntries(
+      platforms.map(({ bin }) => [`${owner}/${bin}`, version]),
+    ),
+    bin: {
+      bun: "bin/bun",
+      bunx: "bin/bun",
+    },
+    os,
+    cpu,
+  });
+  if (exists(".npmrc")) {
+    copy(".npmrc", join(cwd, ".npmrc"));
+  }
+}
+
+async function buildModule(
+  release: Awaited<ReturnType<typeof getRelease>>,
+  { bin, exe, os, arch }: Platform,
+): Promise<void> {
+  const module = `${owner}/${bin}`;
+  log("Building:", `${module}@${version}`);
+  const asset = release.assets.find(({ name }) => name === `${bin}.zip`);
+  if (!asset) {
+    error(`No asset found: ${bin}`);
+    return;
+  }
+  const bun = await extractFromZip(asset.browser_download_url, `${bin}/bun`);
+  const cwd = join("npm", module);
+  write(join(cwd, exe), await bun.async("arraybuffer"));
+  chmod(join(cwd, exe), 0o755);
+  writeJson(join(cwd, "package.json"), {
+    name: module,
+    version: version,
+    preferUnplugged: true,
+    os: [os],
+    cpu: [arch],
+  });
+  if (exists(".npmrc")) {
+    copy(".npmrc", join(cwd, ".npmrc"));
+  }
+}
+
+function publishModule(name: string, dryRun?: boolean): void {
+  log(dryRun ? "Dry-run Publishing:" : "Publishing:", `${name}@${version}`);
+  const { exitCode, stdout, stderr } = spawn(
+    "npm",
+    [
+      "publish",
+      "--access",
+      "public",
+      "--tag",
+      version.includes("canary") ? "canary" : "latest",
+      ...(dryRun ? ["--dry-run"] : []),
+    ],
+    {
+      cwd: join("npm", name),
+    },
+  );
+  if (exitCode === 0) {
+    error(stderr || stdout);
+  }
+}
+
+async function extractFromZip(
+  url: string,
+  filename: string,
+): Promise<JSZipObject> {
+  const response = await fetch(url);
+  const buffer = await response.arrayBuffer();
+  const zip = await loadAsync(buffer);
+  for (const [name, file] of Object.entries(zip.files)) {
+    if (!file.dir && name.startsWith(filename)) {
+      return file;
+    }
+  }
+  debug("Found files:", Object.keys(zip.files));
+  throw new Error(`File not found: ${filename}`);
+}
+
+async function getCanarySemver(): Promise<string> {
+  const date = new Date().toISOString().split("T")[0].replace(/-/g, "");
+  try {
+    const response = await fetch(
+      `https://registry.npmjs.org/-/package/${module}/dist-tags`,
+    );
+    const { canary }: { canary: string } = await response.json();
+    if (canary.includes(date)) {
+      const match = /canary.[0-9]{8}\.([0-9]+)+?/.exec(canary);
+      const build = 1 + (match ? parseInt(match[1]) : 0);
+      return getSemver("canary", build);
+    }
+  } catch (error) {
+    debug("getCanarySemver failed", error);
+  }
+  return getSemver("canary");
+}
+
+function bundle(src: string, dst: string, options: BuildOptions = {}): void {
+  const { errors } = buildSync({
+    bundle: true,
+    treeShaking: true,
+    keepNames: true,
+    minifySyntax: true,
+    pure: ["console.debug"],
+    platform: "node",
+    target: "es6",
+    format: "cjs",
+    entryPoints: [src],
+    outfile: dst,
+    ...options,
+  });
+  if (errors?.length) {
+    const messages = formatMessagesSync(errors, { kind: "error" });
+    throw new Error(messages.join("\n"));
+  }
+}
diff --git a/packages/bun-release/src/console.ts b/packages/bun-release/src/console.ts
new file mode 100644
index 000000000..69e0911d6
--- /dev/null
+++ b/packages/bun-release/src/console.ts
@@ -0,0 +1,77 @@
+import { isatty } from "tty";
+import { createInterface } from "readline";
+
+export const isAction = !!process.env["GITHUB_ACTION"];
+
+export const isDebug =
+  process.env["DEBUG"] === "1" ||
+  process.env["LOG_LEVEL"] === "debug" ||
+  process.env["RUNNER_DEBUG"] === "1";
+
+export function debug(...message: any[]): void {
+  if (isAction) {
+    console.debug("::debug::", ...message);
+  } else if (isDebug) {
+    console.debug(...message);
+  }
+}
+
+export function log(...message: any[]): void {
+  console.log(...message);
+}
+
+export function warn(...message: any[]): void {
+  if (isAction) {
+    console.warn("::warning::", ...message);
+  } else {
+    console.warn(...message);
+  }
+}
+
+export function error(...message: any[]): void {
+  if (isAction) {
+    console.error("::error::", ...message);
+  } else {
+    console.error(...message);
+  }
+}
+
+export function exit(...message: any[]): never {
+  error(...message);
+  process.exit(1);
+}
+
+export function isTty(): boolean {
+  return isatty(process.stdout.fd);
+}
+
+export async function stdin(question: string): Promise<string> {
+  if (isTty()) {
+    return prompt(question) || "";
+  }
+  const reader = createInterface({
+    input: process.stdin,
+    terminal: false,
+  });
+  let buffer = "";
+  reader.on("line", (line) => {
+    buffer += line;
+  });
+  return new Promise((resolve) => {
+    reader.once("close", () => resolve(buffer));
+  });
+}
+
+export async function confirm(message?: string): Promise<void> {
+  if (!isTty()) {
+    return;
+  }
+  const question = message ?? "Confirm?";
+  switch (prompt(`${question} [y/n]`)) {
+    case "y":
+    case "Y":
+      log();
+      return;
+  }
+  exit();
+}
diff --git a/packages/bun-release/src/fetch.ts b/packages/bun-release/src/fetch.ts
new file mode 100644
index 000000000..d9c85a5f3
--- /dev/null
+++ b/packages/bun-release/src/fetch.ts
@@ -0,0 +1,73 @@
+import { debug, isDebug } from "./console";
+
+export const fetch = "fetch" in globalThis ? webFetch : nodeFetch;
+
+type Options = RequestInit & { assert?: boolean };
+
+async function webFetch(url: string, options: Options = {}): Promise<Response> {
+  debug("fetch request", url, options);
+  const response = await globalThis.fetch(url, options, { verbose: isDebug });
+  debug("fetch response", response);
+  if (options?.assert !== false && !isOk(response.status)) {
+    try {
+      debug(await response.text());
+    } catch {}
+    throw new Error(`${response.status}: ${url}`);
+  }
+  return response;
+}
+
+async function nodeFetch(
+  url: string,
+  options: Options = {},
+): Promise<Response> {
+  const { get } = await import("node:http");
+  return new Promise((resolve, reject) => {
+    get(url, (response) => {
+      debug("http.get", url, response.statusCode);
+      const status = response.statusCode ?? 501;
+      if (response.headers.location && isRedirect(status)) {
+        return nodeFetch(url).then(resolve, reject);
+      }
+      if (options?.assert !== false && !isOk(status)) {
+        return reject(new Error(`${status}: ${url}`));
+      }
+      const body: Buffer[] = [];
+      response.on("data", (chunk) => {
+        body.push(chunk);
+      });
+      response.on("end", () => {
+        resolve({
+          ok: isOk(status),
+          status,
+          async arrayBuffer() {
+            return Buffer.concat(body).buffer as ArrayBuffer;
+          },
+          async text() {
+            return Buffer.concat(body).toString("utf-8");
+          },
+          async json() {
+            const text = Buffer.concat(body).toString("utf-8");
+            return JSON.parse(text);
+          },
+        } as Response);
+      });
+    }).on("error", reject);
+  });
+}
+
+function isOk(status: number): boolean {
+  return status >= 200 && status <= 204;
+}
+
+function isRedirect(status: number): boolean {
+  switch (status) {
+    case 301: // Moved Permanently
+    case 308: // Permanent Redirect
+    case 302: // Found
+    case 307: // Temporary Redirect
+    case 303: // See Other
+      return true;
+  }
+  return false;
+}
diff --git a/packages/bun-release/src/fs.ts b/packages/bun-release/src/fs.ts
new file mode 100644
index 000000000..ef20c224a
--- /dev/null
+++ b/packages/bun-release/src/fs.ts
@@ -0,0 +1,166 @@
+import path from "path";
+import fs from "fs";
+import os from "os";
+import crypto from "crypto";
+import { debug } from "./console";
+
+export function join(...paths: (string | string[])[]): string {
+  return path.join(...paths.flat(2));
+}
+
+export function basename(...paths: (string | string[])[]): string {
+  return path.basename(join(...paths));
+}
+
+export function tmp(): string {
+  const tmpdir = process.env["RUNNER_TEMP"] ?? os.tmpdir();
+  const dir = fs.mkdtempSync(join(tmpdir, "bun-"));
+  debug("tmp", dir);
+  return dir;
+}
+
+export function rm(path: string): void {
+  debug("rm", path);
+  try {
+    fs.rmSync(path, { recursive: true });
+    return;
+  } catch (error) {
+    debug("fs.rmSync failed", error);
+    // Did not exist before Node.js v14.
+    // Attempt again with older, slower implementation.
+  }
+  let stats: fs.Stats;
+  try {
+    stats = fs.lstatSync(path);
+  } catch (error) {
+    debug("fs.lstatSync failed", error);
+    // The file was likely deleted, so return early.
+    return;
+  }
+  if (!stats.isDirectory()) {
+    fs.unlinkSync(path);
+    return;
+  }
+  try {
+    fs.rmdirSync(path, { recursive: true });
+    return;
+  } catch (error) {
+    debug("fs.rmdirSync failed", error);
+    // Recursive flag did not exist before Node.js X.
+    // Attempt again with older, slower implementation.
+  }
+  for (const filename of fs.readdirSync(path)) {
+    rm(join(path, filename));
+  }
+  fs.rmdirSync(path);
+}
+
+export function rename(path: string, newPath: string): void {
+  debug("rename", path, newPath);
+  try {
+    fs.renameSync(path, newPath);
+    return;
+  } catch (error) {
+    debug("fs.renameSync failed", error);
+    // If there is an error, delete the new path and try again.
+  }
+  try {
+    rm(newPath);
+  } catch (error) {
+    debug("rm failed", error);
+    // The path could have been deleted already.
+  }
+  fs.renameSync(path, newPath);
+}
+
+export function write(
+  dst: string,
+  content: string | ArrayBuffer | ArrayBufferView,
+): void {
+  debug("write", dst);
+  try {
+    fs.writeFileSync(dst, content);
+    return;
+  } catch (error) {
+    debug("fs.writeFileSync failed", error);
+    // If there is an error, ensure the parent directory
+    // exists and try again.
+    try {
+      fs.mkdirSync(path.dirname(dst), { recursive: true });
+    } catch (error) {
+      debug("fs.mkdirSync failed", error);
+      // The directory could have been created already.
+    }
+    fs.writeFileSync(dst, content);
+  }
+}
+
+export function writeJson(path: string, json: object, force?: boolean): void {
+  let value = json;
+  if (!force && exists(path)) {
+    try {
+      const existing = JSON.parse(read(path));
+      value = {
+        ...existing,
+        ...json,
+      };
+    } catch {
+      value = json;
+    }
+  }
+  write(path, `${JSON.stringify(value, undefined, 2)}\n`);
+}
+
+export function read(path: string): string {
+  debug("read", path);
+  return fs.readFileSync(path, "utf-8");
+}
+
+export function blob(path: string): Blob {
+  debug("blob", path);
+  if ("Bun" in globalThis) {
+    return Bun.file(path);
+  }
+  const buffer = fs.readFileSync(path);
+  return new Blob([buffer], {
+    type: path.endsWith(".zip")
+      ? "application/zip"
+      : path.endsWith(".txt")
+      ? "text/plain"
+      : "application/octet-stream",
+  });
+}
+
+export function hash(content: string | crypto.BinaryLike): string {
+  debug("hash", content);
+  return crypto
+    .createHash("sha256")
+    .update(typeof content === "string" ? fs.readFileSync(content) : content)
+    .digest("hex");
+}
+
+export function chmod(path: string, mode: fs.Mode): void {
+  debug("chmod", path, mode);
+  fs.chmodSync(path, mode);
+}
+
+export function copy(path: string, newPath: string): void {
+  debug("copy", path, newPath);
+  try {
+    fs.copyFileSync(path, newPath);
+    return;
+  } catch (error) {
+    debug("fs.copyFileSync failed", error);
+  }
+  write(newPath, read(path));
+}
+
+export function exists(path: string): boolean {
+  debug("exists", path);
+  try {
+    return fs.existsSync(path);
+  } catch (error) {
+    debug("fs.existsSync failed", error);
+  }
+  return false;
+}
diff --git a/packages/bun-release/src/github.ts b/packages/bun-release/src/github.ts
new file mode 100644
index 000000000..fbbbbf267
--- /dev/null
+++ b/packages/bun-release/src/github.ts
@@ -0,0 +1,113 @@
+import type { Endpoints, RequestParameters, Route } from "@octokit/types";
+import { Octokit } from "octokit";
+import { fetch } from "./fetch";
+import { debug, log, warn, error } from "./console";
+
+const [owner, repo] = process.env["GITHUB_REPOSITORY"]?.split("/") ?? [
+  "oven-sh",
+  "bun",
+];
+
+const octokit = new Octokit({
+  auth: process.env["GITHUB_TOKEN"],
+  request: {
+    fetch,
+  },
+  log: {
+    debug,
+    info: log,
+    warn,
+    error,
+  },
+});
+
+export async function github<R extends Route>(
+  url: R | keyof Endpoints,
+  options?: Omit<
+    R extends keyof Endpoints
+      ? Endpoints[R]["parameters"] & RequestParameters
+      : RequestParameters,
+    "owner" | "repo"
+  >,
+): Promise<
+  R extends keyof Endpoints ? Endpoints[R]["response"]["data"] : unknown
+> {
+  // @ts-ignore
+  const { data } = await octokit.request(url, {
+    owner,
+    repo,
+    ...options,
+  });
+  return data;
+}
+
+export async function getRelease(tag?: string) {
+  if (!tag) {
+    return github("GET /repos/{owner}/{repo}/releases/latest");
+  }
+  return github("GET /repos/{owner}/{repo}/releases/tags/{tag}", {
+    tag: formatTag(tag),
+  });
+}
+
+export async function uploadAsset(tag: string, name: string, blob: Blob) {
+  const release = await getRelease(tag);
+  const asset = release.assets.find((asset) => asset.name === name);
+  // Github requires that existing assets are deleted before uploading
+  // a new asset, but does not provide a rename or re-upload API?!?
+  if (asset) {
+    await github("DELETE /repos/{owner}/{repo}/releases/assets/{asset_id}", {
+      asset_id: asset.id,
+    });
+  }
+  return github(
+    "POST {origin}/repos/{owner}/{repo}/releases/{release_id}/assets{?name,label}",
+    {
+      baseUrl: "https://uploads.github.com",
+      release_id: release.id,
+      name,
+      headers: {
+        "content-type": blob.type,
+        "content-length": blob.size,
+      },
+      data: Buffer.from(await blob.arrayBuffer()),
+    },
+  );
+}
+
+export async function downloadAsset(tag: string, name: string): Promise<Blob> {
+  const release = await getRelease(tag);
+  const asset = release.assets.find((asset) => asset.name === name);
+  if (!asset) {
+    throw new Error(`Asset not found: ${name}`);
+  }
+  const response = await fetch(asset.browser_download_url);
+  return response.blob();
+}
+
+export async function getSha(tag: string, format?: "short" | "long") {
+  const { sha } = await github("GET /repos/{owner}/{repo}/git/tags/{tag_sha}", {
+    tag_sha: formatTag(tag),
+  });
+  return format === "short" ? sha.substring(0, 7) : sha;
+}
+
+export async function getSemver(tag?: string, build?: number): Promise<string> {
+  const { tag_name } = await getRelease(tag);
+  if (tag_name !== "canary") {
+    return tag_name.replace("bun-v", "");
+  }
+  const sha = await getSha(tag_name, "short");
+  const date = new Date().toISOString().split("T")[0].replace(/-/g, "");
+  return `${Bun.version}-canary.${date}.${build ?? 1}+${sha}`;
+}
+
+export function formatTag(tag: string): string {
+  if (tag === "canary" || tag.startsWith("bun-v")) {
+    return tag;
+  }
+  if (tag.startsWith("v")) {
+    return tag.slice(1);
+  }
+  return `bun-v${tag}`;
+}
diff --git a/packages/bun-npm/src/install.ts b/packages/bun-release/src/npm/install.ts
index 9eabd2c41..ac6f2e670 100644
--- a/packages/bun-npm/src/install.ts
+++ b/packages/bun-release/src/npm/install.ts
@@ -1,11 +1,14 @@
-import { fetch, chmod, join, rename, rm, tmp, write, spawn } from "./util";
+import { fetch } from "../fetch";
+import { spawn } from "../spawn";
+import { chmod, join, rename, rm, tmp, write } from "../fs";
 import { unzipSync } from "zlib";
-import type { Platform } from "./platform";
-import { os, arch, supportedPlatforms } from "./platform";
+import type { Platform } from "../platform";
+import { os, arch, supportedPlatforms } from "../platform";
+import { debug, error } from "../console";
 
-declare const npmVersion: string;
-declare const npmPackage: string;
-declare const npmOwner: string;
+declare const version: string;
+declare const module: string;
+declare const owner: string;
 
 export async function importBun(): Promise<string> {
   if (!supportedPlatforms.length) {
@@ -15,16 +18,16 @@ export async function importBun(): Promise<string> {
     try {
       return await requireBun(platform);
     } catch (error) {
-      console.debug("requireBun failed", error);
+      debug("requireBun failed", error);
     }
   }
-  throw new Error(`Failed to install package "${npmPackage}"`);
+  throw new Error(`Failed to install package "${module}"`);
 }
 
 async function requireBun(platform: Platform): Promise<string> {
-  const npmPackage = `${npmOwner}/${platform.bin}`;
+  const module = `${owner}/${platform.bin}`;
   function resolveBun() {
-    const exe = require.resolve(join(npmPackage, platform.exe));
+    const exe = require.resolve(join(module, platform.exe));
     const { exitCode, stderr, stdout } = spawn(exe, ["--version"]);
     if (exitCode === 0) {
       return exe;
@@ -33,29 +36,26 @@ async function requireBun(platform: Platform): Promise<string> {
   }
   try {
     return resolveBun();
-  } catch (error) {
-    console.debug("resolveBun failed", error);
-    console.error(
-      `Failed to find package "${npmPackage}".`,
+  } catch (cause) {
+    debug("resolveBun failed", cause);
+    error(
+      `Failed to find package "${module}".`,
       `You may have used the "--no-optional" flag when running "npm install".`,
     );
   }
-  const cwd = join("node_modules", npmPackage);
+  const cwd = join("node_modules", module);
   try {
     installBun(platform, cwd);
-  } catch (error) {
-    console.debug("installBun failed", error);
-    console.error(
-      `Failed to install package "${npmPackage}" using "npm install".`,
-      error,
-    );
+  } catch (cause) {
+    debug("installBun failed", cause);
+    error(`Failed to install package "${module}" using "npm install".`, cause);
     try {
       await downloadBun(platform, cwd);
-    } catch (error) {
-      console.debug("downloadBun failed", error);
-      console.error(
-        `Failed to download package "${npmPackage}" from "registry.npmjs.org".`,
-        error,
+    } catch (cause) {
+      debug("downloadBun failed", cause);
+      error(
+        `Failed to download package "${module}" from "registry.npmjs.org".`,
+        cause,
       );
     }
   }
@@ -63,7 +63,7 @@ async function requireBun(platform: Platform): Promise<string> {
 }
 
 function installBun(platform: Platform, dst: string): void {
-  const npmPackage = `${npmOwner}/${platform.bin}`;
+  const module = `${owner}/${platform.bin}`;
   const cwd = tmp();
   try {
     write(join(cwd, "package.json"), "{}");
@@ -75,7 +75,7 @@ function installBun(platform: Platform, dst: string): void {
         "--prefer-offline",
         "--no-audit",
         "--progress=false",
-        `${npmPackage}@${npmVersion}`,
+        `${module}@${version}`,
       ],
       {
         cwd,
@@ -87,13 +87,13 @@ function installBun(platform: Platform, dst: string): void {
       },
     );
     if (exitCode === 0) {
-      rename(join(cwd, "node_modules", npmPackage), dst);
+      rename(join(cwd, "node_modules", module), dst);
     }
   } finally {
     try {
       rm(cwd);
     } catch (error) {
-      console.debug("rm failed", error);
+      debug("rm failed", error);
       // There is nothing to do if the directory cannot be cleaned up.
     }
   }
@@ -101,7 +101,7 @@ function installBun(platform: Platform, dst: string): void {
 
 async function downloadBun(platform: Platform, dst: string): Promise<void> {
   const response = await fetch(
-    `https://registry.npmjs.org/${npmOwner}/${platform.bin}/-/${platform.bin}-${npmVersion}.tgz`,
+    `https://registry.npmjs.org/${owner}/${platform.bin}/-/${platform.bin}-${version}.tgz`,
   );
   const tgz = await response.arrayBuffer();
   let buffer: Buffer;
@@ -127,7 +127,7 @@ async function downloadBun(platform: Platform, dst: string): Promise<void> {
         try {
           chmod(join(dst, name), 0o755);
         } catch (error) {
-          console.debug("chmod failed", error);
+          debug("chmod failed", error);
         }
       }
       offset += (size + 511) & ~511;
@@ -151,7 +151,7 @@ export function optimizeBun(path: string): void {
     rename(path, join(__dirname, "bin", "bun"));
     return;
   } catch (error) {
-    console.debug("optimizeBun failed", error);
+    debug("optimizeBun failed", error);
   }
   throw new Error(
     "Your package manager doesn't seem to support bun. To use bun, install using the following command: curl -fsSL https://bun.sh/install | bash",
diff --git a/packages/bun-npm/src/platform.ts b/packages/bun-release/src/platform.ts
index a01cc3ddc..fb438d824 100644
--- a/packages/bun-npm/src/platform.ts
+++ b/packages/bun-release/src/platform.ts
@@ -1,4 +1,6 @@
-import { read, spawn } from "./util";
+import { spawn } from "./spawn";
+import { read } from "./fs";
+import { debug } from "./console";
 
 export const os = process.platform;
 
@@ -71,7 +73,7 @@ function isLinuxAVX2(): boolean {
   try {
     return read("/proc/cpuinfo").includes("avx2");
   } catch (error) {
-    console.debug("isLinuxAVX2 failed", error);
+    debug("isLinuxAVX2 failed", error);
     return false;
   }
 }
@@ -81,7 +83,7 @@ function isDarwinAVX2(): boolean {
     const { exitCode, stdout } = spawn("sysctl", ["-n", "machdep.cpu"]);
     return exitCode === 0 && stdout.includes("AVX2");
   } catch (error) {
-    console.debug("isDarwinAVX2 failed", error);
+    debug("isDarwinAVX2 failed", error);
     return false;
   }
 }
@@ -94,7 +96,7 @@ function isRosetta2(): boolean {
     ]);
     return exitCode === 0 && stdout.includes("1");
   } catch (error) {
-    console.debug("isRosetta2 failed", error);
+    debug("isRosetta2 failed", error);
     return false;
   }
 }
diff --git a/packages/bun-release/src/spawn.ts b/packages/bun-release/src/spawn.ts
new file mode 100644
index 000000000..7a04dc3f2
--- /dev/null
+++ b/packages/bun-release/src/spawn.ts
@@ -0,0 +1,24 @@
+import child_process from "child_process";
+import { debug } from "./console";
+
+export function spawn(
+  cmd: string,
+  args: string[],
+  options: child_process.SpawnOptions = {},
+): {
+  exitCode: number;
+  stdout: string;
+  stderr: string;
+} {
+  debug("spawn", [cmd, ...args].join(" "));
+  const { status, stdout, stderr } = child_process.spawnSync(cmd, args, {
+    stdio: "pipe",
+    encoding: "utf-8",
+    ...options,
+  });
+  return {
+    exitCode: status ?? 1,
+    stdout,
+    stderr,
+  };
+}
diff --git a/packages/bun-npm/tsconfig.json b/packages/bun-release/tsconfig.json
index 9272b9920..b7194ece3 100644
--- a/packages/bun-npm/tsconfig.json
+++ b/packages/bun-release/tsconfig.json
@@ -1,8 +1,8 @@
 {
   "compilerOptions": {
-    "lib": ["esnext"],
-    "module": "esnext",
-    "target": "esnext",
+    "lib": ["ESNext"],
+    "module": "ESNext",
+    "target": "ESNext",
     "moduleResolution": "node",
     "types": ["bun-types"],
     "esModuleInterop": true,