FRB Docker

Use this skill for ordinary FRB Docker/devcontainer work: local container usage, Apple Silicon behavior, and local Dockerfile validation.

Read frb-upgrade-docker before changing toolchain inputs or publishing fzyzcjy/flutter_rust_bridge_dev. It owns PR boundaries, candidate tags, stable-tag promotion, and registry workflow policy.

Source of Truth

• Devcontainer config: .devcontainer/devcontainer.json
• Dockerfile: .devcontainer/Dockerfile
• Publish workflow: .github/workflows/publish_dev_docker.yaml
• Published image: fzyzcjy/flutter_rust_bridge_dev

The Dockerfile is the source of truth for tool versions. Derive image tags from its ARG values instead of hardcoding stale versions.

Daily Local Use

Devcontainer

Prefer devcontainer for normal development.

shell
Dev Containers: Reopen in Container

The devcontainer builds from .devcontainer/Dockerfile and runs ./frb_internal pub-get-all to prepare Dart/Flutter package dependencies; first Rust/wasm builds may still be slow because crate compilation caches are not warmed.

Published Image

Default behavior is still to build locally from .devcontainer/Dockerfile. If you want to use a prebuilt image instead, switch to the full version tag derived from the current Dockerfile args rather than latest.

shell
docker run --rm -it -v "$PWD:/workspace" -w /workspace fzyzcjy/flutter_rust_bridge_dev:latest bash

Use latest only for quick local checks where reproducibility does not matter.

Manual Docker Build

Use this when not using VS Code devcontainers, or when validating local Dockerfile changes.

shell
docker build -f .devcontainer/Dockerfile -t frb-dev .devcontainer
docker run --rm -it -v "$PWD:/workspace" -w /workspace frb-dev bash

Inside a fresh manual container, run:

shell
./frb_internal pub-get-all

Then run normal development commands such as:

shell
./frb_internal lint
cargo check

Apple Silicon

Apple Silicon Macs use the same commands as other platforms. Do not add --platform linux/amd64 for normal local development.

Docker should select linux/arm64 automatically for multi-arch images. If a command only works with --platform linux/amd64, treat that as a regression to investigate.

Local Dockerfile Validation

For Dockerfile changes, validate at least:

shell
docker build -f .devcontainer/Dockerfile -t frb-dev .devcontainer
docker run --rm -v "$PWD:/workspace" -w /workspace frb-dev bash -lc './frb_internal --help'

For environment changes, smoke-test the installed tools:

shell
docker run --rm -v "$PWD:/workspace" -w /workspace frb-dev bash -lc '
set -euo pipefail
flutter --version
dart --version
node --version
npm --version
cargo --version
wasm-pack --version
"${CHROME_BIN}" --version
'

For broader confidence, run:

shell
docker run --rm -v "$PWD:/workspace" -w /workspace frb-dev bash -lc './frb_internal pub-get-all && ./frb_internal lint --fix'
docker run --rm -v "$PWD:/workspace" -w /workspace/frb_rust frb-dev bash -lc 'cargo check && cargo check --target wasm32-unknown-unknown'

If generated files drift during lint/codegen, do not manually edit generated files. Restore unrelated generated drift unless the task intentionally changes generation outputs.

Do not publish from this ordinary-use workflow. Continue with frb-upgrade-docker when validation must produce a candidate or stable registry image.