Introduce experimental flag: bun build --auto-install <entry points...>

[Jarred-Sumner]

What does this PR do?

This implements auto install for bun build.

When using bun's bundler, you can now automatically install dependencies -- and only the dependencies the bundled code is using. This means you can skip running bun install (or npm/yarn/pnpm install).

This can lead to smaller Docker containers and faster CI times than using something like turbo prune or "devDependencies" in package.json because dependencies which are not used by any code will not be installed.

To use it:

bun build --auto-install <entry-points...>
bun build -i <entry-points>

If a bun.lockb or a package-json.lock is present, it will continue to use the resolved versions from the lockfile (and will still save space because it only installs those which are referenced). If no lockfile is present, it will prefer the versions from package.json.

Tradeoffs:

• This doesn't run any postinstall scripts
• This doesn't support patch (though that could be fixed in the future)
• If dependencies are not imported or required in any code visible to bun build, it will not be installed

This uses bun's global cache, which conserves disk space by avoiding a per-project node_modules folder.

How did you verify your code works?

TODO before merging:

• Handle manifest download errors
• Handle package download errors
• Investigate difficulty of supporting Bun.build()
• Be a little smarter about resolving package versions
• Some tests

[robobun]

❌ @Jarred-Sumner, your commit 394701e has 15 failures in #7130:

test/js/bun/http/bun-serve-static.test.ts - timeout on 🐧 3.20 x64-baseline

test/cli/hot/hot.test.ts - timeout on 🐧 3.20 x64-baseline

test/cli/hot/hot.test.ts - timeout on 🐧 3.20 x64

test/js/web/timers/setTimeout.test.js - 1 failing on 🐧 22.04 x64

test/js/node/test/parallel/worker-nested-uncaught.test.js - segmentation fault on 🐧 3.20 x64-baseline

test/integration/next-pages/test/dev-server.test.ts - 1 failing on 🐧 3.20 x64-baseline

test/integration/next-pages/test/dev-server.test.ts - 1 failing on 🐧 3.20 x64

test/js/node/test/parallel/fs-watch-recursive-linux-parallel-remove.test.js - 1 failing on 🐧 22.04 x64-baseline

test/js/node/test/parallel/fs-watch-recursive-linux-parallel-remove.test.js - 1 failing on 🐧 3.20 aarch64

test/js/node/test/parallel/fs-watch-recursive-linux-parallel-remove.test.js - 1 failing on 🐧 22.04 x64

test/js/node/test/parallel/fs-watch-recursive-linux-parallel-remove.test.js - 1 failing on 🐧 3.20 x64-baseline

test/js/node/test/parallel/fs-watch-recursive-linux-parallel-remove.test.js - 1 failing on 🐧 3.20 x64

test/v8/v8.test.ts - 22 failing on 🐧 3.20 aarch64

test/v8/v8.test.ts - 22 failing on 🐧 3.20 x64-baseline

test/v8/v8.test.ts - 22 failing on 🐧 3.20 x64

test/js/node/child_process/child_process.test.ts - 1 failing on 🐧 3.20 aarch64

test/js/node/child_process/child_process.test.ts - 1 failing on 🐧 3.20 x64-baseline

test/js/node/child_process/child_process.test.ts - 1 failing on 🐧 3.20 x64

test/js/bun/http/serve.test.ts - SIGTRAP on 🐧 3.20 aarch64

test/js/bun/http/serve.test.ts - SIGILL on 🐧 3.20 x64-baseline

test/js/bun/http/serve.test.ts - SIGILL on 🐧 3.20 x64

test/bake/dev/esm.test.ts - 1 failing on 🐧 3.20 aarch64

test/js/bun/http/serve-body-leak.test.ts - 1 failing on 🍎 13 aarch64

test/cli/install/registry/bun-install-registry.test.ts - 1 failing on 🪟 2019 x64-baseline

test/cli/install/registry/bun-install-registry.test.ts - 1 failing on 🪟 2019 x64

test/cli/install/registry/bun-install-registry.test.ts - 1 failing on 🍎 14 aarch64

test/cli/install/registry/bun-install-registry.test.ts - 1 failing on 🍎 13 aarch64

test/cli/install/registry/bun-install-registry.test.ts - 1 failing on 🍎 14 x64

test/cli/install/registry/bun-install-registry.test.ts - 1 failing on 🍎 13 x64

test/cli/install/registry/bun-install-registry.test.ts - 1 failing on 🐧 11 aarch64

test/cli/install/registry/bun-install-registry.test.ts - 1 failing on 🐧 12 aarch64

test/cli/install/registry/bun-install-registry.test.ts - 1 failing on 🐧 22.04 aarch64

test/cli/install/registry/bun-install-registry.test.ts - 1 failing on 🐧 20.04 aarch64

test/cli/install/registry/bun-install-registry.test.ts - 1 failing on 🐧 12 x64-baseline

test/cli/install/registry/bun-install-registry.test.ts - 1 failing on 🐧 11 x64-baseline

test/cli/install/registry/bun-install-registry.test.ts - 1 failing on 🐧 20.04 x64-baseline

test/cli/install/registry/bun-install-registry.test.ts - 1 failing on 🐧 12 x64

test/cli/install/registry/bun-install-registry.test.ts - 1 failing on 🐧 22.04 x64

test/cli/install/registry/bun-install-registry.test.ts - 1 failing on 🐧 3.20 aarch64

test/cli/install/registry/bun-install-registry.test.ts - 1 failing on 🐧 11 x64

test/cli/install/registry/bun-install-registry.test.ts - 1 failing on 🐧 20.04 x64

test/cli/install/registry/bun-install-registry.test.ts - timeout on 🐧 22.04 x64-baseline

test/cli/install/registry/bun-install-registry.test.ts - 1 failing on 🐧 3.20 x64-baseline

test/cli/install/registry/bun-install-registry.test.ts - 1 failing on 🐧 3.20 x64

test/cli/run/require-cache.test.ts - 1 failing on 🪟 2019 x64-baseline

test/cli/install/bun-workspaces.test.ts - 1 failing on 🪟 2019 x64

test/cli/install/bun-workspaces.test.ts - 1 failing on 🪟 2019 x64-baseline

test/cli/install/bun-workspaces.test.ts - 1 failing on 🍎 13 aarch64

test/cli/install/bun-workspaces.test.ts - 1 failing on 🍎 14 aarch64

test/cli/install/bun-workspaces.test.ts - 1 failing on 🍎 14 x64

test/cli/install/bun-workspaces.test.ts - 1 failing on 🍎 13 x64

test/cli/install/bun-workspaces.test.ts - 1 failing on 🐧 12 aarch64

test/cli/install/bun-workspaces.test.ts - 1 failing on 🐧 11 aarch64

test/cli/install/bun-workspaces.test.ts - 1 failing on 🐧 22.04 aarch64

test/cli/install/bun-workspaces.test.ts - 1 failing on 🐧 20.04 aarch64

test/cli/install/bun-workspaces.test.ts - 1 failing on 🐧 11 x64-baseline

test/cli/install/bun-workspaces.test.ts - 1 failing on 🐧 12 x64-baseline

test/cli/install/bun-workspaces.test.ts - 1 failing on 🐧 20.04 x64-baseline

test/cli/install/bun-workspaces.test.ts - 1 failing on 🐧 22.04 x64-baseline

test/cli/install/bun-workspaces.test.ts - 1 failing on 🐧 3.20 aarch64

test/cli/install/bun-workspaces.test.ts - 1 failing on 🐧 22.04 x64

test/cli/install/bun-workspaces.test.ts - 1 failing on 🐧 12 x64

test/cli/install/bun-workspaces.test.ts - 1 failing on 🐧 11 x64

test/cli/install/bun-workspaces.test.ts - 1 failing on 🐧 20.04 x64

test/cli/install/bun-workspaces.test.ts - 1 failing on 🐧 3.20 x64-baseline

test/cli/install/bun-workspaces.test.ts - 1 failing on 🐧 3.20 x64

test/cli/install/bun-run.test.ts - 2 failing on 🍎 13 aarch64

test/cli/install/bun-run.test.ts - 2 failing on 🍎 14 aarch64

test/cli/install/bun-run.test.ts - 2 failing on 🍎 13 x64

test/cli/install/bun-run.test.ts - 2 failing on 🍎 14 x64

test/cli/install/bun-run.test.ts - 2 failing on 🪟 2019 x64

test/cli/install/bun-run.test.ts - 2 failing on 🪟 2019 x64-baseline

test/cli/install/bun-run.test.ts - 2 failing on 🐧 12 aarch64

test/cli/install/bun-run.test.ts - 2 failing on 🐧 11 aarch64

test/cli/install/bun-run.test.ts - 2 failing on 🐧 22.04 aarch64

test/cli/install/bun-run.test.ts - 2 failing on 🐧 20.04 aarch64

test/cli/install/bun-run.test.ts - 2 failing on 🐧 11 x64-baseline

test/cli/install/bun-run.test.ts - 2 failing on 🐧 12 x64-baseline

test/cli/install/bun-run.test.ts - 2 failing on 🐧 20.04 x64-baseline

test/cli/install/bun-run.test.ts - 2 failing on 🐧 22.04 x64-baseline

test/cli/install/bun-run.test.ts - 2 failing on 🐧 3.20 aarch64

test/cli/install/bun-run.test.ts - 2 failing on 🐧 11 x64

test/cli/install/bun-run.test.ts - 2 failing on 🐧 12 x64

test/cli/install/bun-run.test.ts - 2 failing on 🐧 20.04 x64

test/cli/install/bun-run.test.ts - 2 failing on 🐧 22.04 x64

test/cli/install/bun-run.test.ts - 2 failing on 🐧 3.20 x64-baseline

test/cli/install/bun-run.test.ts - 2 failing on 🐧 3.20 x64