Sample Native Bazel App

A minimal Bazel iOS app (rules_apple + rules_swift, bzlmod, Bazel 9) that your coding agent can build from any environment, including Linux, using Limrun's remote build execution (RBE). No local Xcode required.

It is deliberately tiny so the build is fast:

• //App:App - a single-module ios_application (SwiftUI "Hello, world!") with an asset catalog and a launch storyboard.

Setup

Get an API key from the Limrun Console:

export LIM_API_KEY=lim_....

Install the lim CLI:

npm install --global lim

The agent skill in .agents/skills/limrun-xcode-bazel documents the full lim xcode rbe workflow.

Build over Limrun RBE

From the workspace root, bring up the remote build stack:

lim xcode rbe

This targets/creates a remote Xcode instance, opens a tunnel, and writes a .limrun/ Bazel config. Keep it running. It prints the exact build command, which on Bazel 9 is:

bazelisk --digest_function=sha256 build --config=limrun //App:App

Run that in another shell. Apple build actions (Swift compile, asset catalog, storyboard, bundling) execute on the remote Mac worker. Stop the stack with lim xcode rbe --stop.

Bazel 9 defaults to the BLAKE3 digest; the Limrun cache currently requires SHA256, so --digest_function=sha256 must come before build (it is a startup flag). Use the command the CLI prints verbatim.

Local build (optional, macOS with Xcode)

If you are on a Mac with Xcode and just want a simulator .app:

bazelisk build //App:App

The built bundle lands under bazel-bin/App/App.app. Archive and push it to Limrun Asset Storage to get simulators with the app pre-installed:

tar -czf sample-native-bazel-app.app.tar.gz -C bazel-bin/App App.app
lim push sample-native-bazel-app.app.tar.gz
lim run ios --install-asset=sample-native-bazel-app.app.tar.gz