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Run tests natively and build images directly from GitHub Actions using a chroot-based virtualized Raspberry Pi (raspios/raspbian) environment

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arm-runner-action

Run tests natively and build images directly from GitHub Actions using a chroot-based virtualized Raspberry Pi (raspios/raspbian) environment.

With this action, you can:

  • run tests in an environment closer to a real embedded system, using qemu userland linux emulation;
  • build artifacts in such environment and upload them;
  • prepare images that are ready to run on Raspberry-Pi and other arm embedded devices.

Usage

Minimal usage is as follows:

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v2
    - uses: pguyot/arm-runner-action@v1
      with:
        commands: |
            commands to run tests

Typical usage to upload an image as an artifact:

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v2
    - uses: pguyot/arm-runner-action@v1
      id: build_image
      with:
        commands: |
            commands to build image
    - name: Compress the release image
      if: github.ref == 'refs/heads/releng' || startsWith(github.ref, 'refs/tags/')
      run: |
        mv ${{ steps.build_image.outputs.image }} my-release-image.img
        xz -0 -T 0 -v my-release-image.img
    - name: Upload release image
      uses: actions/upload-artifact@v2
      if: github.ref == 'refs/heads/releng' || startsWith(github.ref, 'refs/tags/')
      with:
        name: Release image
        path: my-release-image.img.xz

Several scenarios are actually implemented as tests.

Commands

The repository is copied to the image before the commands script is executed in the chroot environment. The commands script is copied to /tmp/ and is deleted on cleanup.

Inputs

commands

Commands to execute. Written to a script within the image. Required.

base_image

Base image to use.

The following values are allowed:

  • raspbian_lite:2020-02-13
  • raspios_lite:2021-03-04
  • raspios_lite:2021-05-07 (default)
  • dietpi:rpi_armv6_buster

The input parameter also accepts any custom URL beginning in http(s)://...

More images will be added, eventually. Feel free to submit PRs.

image_additional_mb

Enlarge the image by this number of MB. Default is to not enlarge the image.

cpu

CPU to pass to qemu. Default value is arm1176 which translates to arm6vl, suitable for Pi Zero. Other values include cortex-a8 which translates to arm7vl.

copy_artifact_path

Source paths(s) inside the image to copy outside after the commands have executed. Relative to the /<repository_name> directory or the directory defined with copy_repolity_path. Globs are allowed. To copy multiple paths, provide a list of paths, separated by semi-colons. Default is not to copy.

copy_artifact_dest

Destination path to copy outside the image after the commands have executed. Relative to the working directory (outside the image). Defaults to .

copy_repository_path

Absolute path, inside the image, where the repository is copied. Defaults to /<repository_name>. It is also the working directory where commands are executed.

optimize_image

Zero-fill unused filesystem blocks during final cleanup, to make any later image compression more efficient. Default is to zero-fill.

use_systemd_nspawn

Use systemd-nspanw instead of chroot to run commands. Default is to use chroot.

shell

Path to shell or shell name to run the commands in. Defaults to /bin/sh. If missing, it will be installed. See shell_package. If defined as basename filename, it will be used as long as the shell binary exists under PATH after the package is installed.

shell_package

The shell package to install, if different from shell. It may be handy with some shells that come packaged under a different package name.

For example, to use ksh93 as shell, set shell to ksh93 and shell_package to ksh.

exit_on_fail

Exit immediately if a command exits with a non-zero status. Default is to exit. Set to no or false to disable exiting on command failure.

debug

Display executed commands as they are executed. Enabled by default.

import_github_env

Imports variables written so far to $GITHUB_ENV to the image. Default is not to import any environment. This may be useful for sharing external variables with the virtual environment. Set to yes or true to enable.

Practically, this setting allows constructs like ${VARIABLE_NAME} instead of ${{ env.VARIABLE_NAME }} within the command set.

export_github_env

Enables $GITHUB_ENV for commands in the image and exports its contents on completion to subsequent tasks. This option is an alternative to using a file-based artifact for passing the results of commands outside the image environment.

Note this parameter does not enable importing any contents written to $GITHUB_ENV ahead of running the commands. For that, use import_github_env.

Outputs

image

Path to the image, useful after the step to upload the image as an artifact.

Examples

Real world examples include:

Releases

Releases are listed on dedicated page. Release numbers follow semantic versionning : incompatible changes in invocation will be reflected with major release upgrades.

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Run tests natively and build images directly from GitHub Actions using a chroot-based virtualized Raspberry Pi (raspios/raspbian) environment

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