cargo-deb-arm

A very simple Dockerfile + action for ARM cross-compilation with cargo deb. Based on cargo-deb-armv7-debian and rust-crosscompiler-arm.

Currently only supports:

• aarch64-unknown-linux-gnu
• armv7-unknown-linux-gnueabihf

Open to adding more as required, feel free to submit PRs + tests.

Originally written for use in bottom.

Action

To use the included action in a workflow:

Inputs

args

The arguments you wish to pass to cargo deb.

working-directory

The working directory, if the default repo directory isn't where you want to run cargo deb on.

Outputs

No outputs, the build artifacts should be in the directory you gave.

Example Usage

- name: Run cargo deb
  uses: ClementTsang/cargo-deb-arm@v0.0.2-alpha
  with:
    args: --target aarch64-unknown-linux-gnu
    working-directory: test/hello_world

See the test workflow for a more complete example of usage.

Dockerfile

You can also directly use the Dockerfile (which is published as a ghcr image). For example:

docker pull ghcr.io/clementtsang/cargo-deb-arm:latest

docker run -t --rm --mount type=bind,source="$(pwd)",target=/volume \
  ghcr.io/clementtsang/cargo-deb-arm \
  "--target ${{ matrix.triple.arch }}" \
  "/volume/test/hello_world"

More specialized Dockerfiles are also included and published (see ./docker). For example:

docker pull ghcr.io/clementtsang/cargo-deb-aarch64-unknown-linux-gnu:latest

docker run -t --rm --mount type=bind,source="$(pwd)",target=/volume \
  ghcr.io/clementtsang/cargo-deb-aarch64-unknown-linux-gnu \
  "--target ${{ matrix.triple.arch }}" \
  "/volume/test/hello_world"

Note that the latest tag generally points to the latest stable Rust version. When a new stable Rust version comes out, this is usually automatically updated as the corresponding Docker container updates.

Known Problems

It seems like the automatic dependency detection includes the cross-compilation libraries, which may not be desirable. I'm not sure how to resolve this at the moment, but a (kinda bad) workaround is manually setting platform-specific depends overrides in your main project's Cargo.toml, and calling them as needed. For example:

# Cargo.toml

[package.metadata.deb]
section = "utility"

[package.metadata.deb.variants.arm64]
depends = "libc6:arm64 (>= 2.28)"

- name: Run cargo deb
  uses: ClementTsang/cargo-deb-arm@v0.0.2-alpha
  with:
    args: --target aarch64-unknown-linux-gnu --variant arm64
    working-directory: test/hello_world

See cargo-deb's documentation for more information.