action.yml

name: "Setup Docker on macOS"
description: "Setup Docker on macOS using Colima, Lima-VM, and Homebrew."
inputs:
  lima:
    description: "Lima version. Defaults to the latest version."
    required: false
    default: "latest"
  colima:
    description: "Colima version. Defaults to the latest version."
    required: false
    default: "latest"
  colima-network-address:
    description: "Starts Colima with a reachable network address (`--network-address`). Makes Colima startup slower."
    required: false
    default: "false"
  colima-additional-options:
    description: "Starts Colima with additional options. May break Colima startup."
    required: false
outputs:
  colima-version:
    value: ${{ steps.colima-version.outputs.version }}
    description: Version of Colima
  docker-client-version:
    value: ${{ steps.docker-client-version.outputs.version }}
    description: Version of the Docker client
  docker-compose-version:
    value: ${{ steps.docker-compose-version.outputs.version }}
    description: Version of Docker Compose
runs:
  using: "composite"
  steps:
    - name: OS safety check
      if: runner.os != 'macOS'
      run: |
        echo "Not a macOS runner, exiting."
        exit 1
      shell: bash
    - name: ARM64 safety check
      run: |
        arch_name=$(uname -m)
        if [ "$arch_name" = "arm64" ]
        then
            echo "Detected M-series processor runner without nested virtualization support, exiting."
            exit 1
        else
            echo "Running on supported architecture: ${arch_name}"
        fi
      shell: bash
    - name: Update Homebrew
      run: |
        echo "::group::Updating Homebrew"
        brew update
        echo "::endgroup::"
      shell: bash
    - name: Install Lima
      env:
        GH_TOKEN: ${{ github.token }}
        INPUT_LIMA: ${{ inputs.lima }}
      run: |
        if [ $INPUT_LIMA == "latest" ]
        then
            LIMA_VERSION=$(gh release -R lima-vm/lima view --json tagName -q ".tagName")
        else
            LIMA_VERSION=$INPUT_LIMA
        fi

        echo "::group::Installing Lima version $LIMA_VERSION"
        curl -fsSL "https://github.com/lima-vm/lima/releases/download/${LIMA_VERSION}/lima-${LIMA_VERSION:1}-$(uname -s)-$(uname -m).tar.gz" | tar Cxzvm /usr/local
        echo "::endgroup::"
      shell: bash
    - name: Install Colima
      env:
        GH_TOKEN: ${{ github.token }}
        INPUT_COLIMA: ${{ inputs.colima }}
      run: |
        if [ $INPUT_COLIMA == "latest" ]
        then
            COLIMA_VERSION=$(gh release -R abiosoft/colima view --json tagName -q ".tagName")
        else
            COLIMA_VERSION=$INPUT_COLIMA
        fi

        echo "::group::Installing Colima version $COLIMA_VERSION"
        curl -LO https://github.com/abiosoft/colima/releases/download/${COLIMA_VERSION}/colima-$(uname)-$(uname -m)

        # install in $PATH
        install colima-$(uname)-$(uname -m) /usr/local/bin/colima
        echo "::endgroup::"
      shell: bash
    - name: Workaround for Python conflicts in GHA Runners
      env:
        HOMEBREW_NO_AUTO_UPDATE: "1"
        HOMEBREW_NO_INSTALL_UPGRADE: "1"
        HOMEBREW_NO_INSTALLED_DEPENDENTS_CHECK: "1"
      run: |
        brew unlink python@3 || true
        brew uninstall --ignore-dependencies python@3 || true
        brew install --overwrite --force python@3
      shell: bash
    - name: Install Docker client, and Docker Compose
      env:
        HOMEBREW_NO_AUTO_UPDATE: "1"
        HOMEBREW_NO_INSTALL_UPGRADE: "1"
        HOMEBREW_NO_INSTALLED_DEPENDENTS_CHECK: "1"
      run: |
        echo "::group::Installing Docker client and Docker Compose"
        brew install docker docker-compose
        echo "::endgroup::"
      shell: bash
    - name: Configure Docker Compose plugin
      run: |
        mkdir -p ~/.docker/cli-plugins
        ln -sfn "$(brew --prefix)/opt/docker-compose/bin/docker-compose" ~/.docker/cli-plugins/docker-compose
      shell: bash
    - name: Start Colima
      env:
        COLIMA_ADDITIONAL_OPTIONS: ${{ inputs.colima-additional-options }}
        COLIMA_NETWORK_ADDRESS: ${{ inputs.colima-network-address }}
      run: |
        CPU_COUNT=$(sysctl -n hw.ncpu)
        MEMORY=$(sysctl hw.memsize | awk '{print $2/1024/1024/1024}')
        COLIMA_ARGS="--cpu $CPU_COUNT --memory $MEMORY --arch x86_64 --vm-type=vz --mount-type=virtiofs"
        if [ $COLIMA_NETWORK_ADDRESS == "true" ]
        then
          COLIMA_ARGS="$COLIMA_ARGS --network-address"
        fi
        if [ -n "$COLIMA_ADDITIONAL_OPTIONS" ]
        then
          COLIMA_ARGS="$COLIMA_ARGS $COLIMA_ADDITIONAL_OPTIONS"
        fi
        echo "::group::Starting Colima with args: $COLIMA_ARGS"
        colima start $COLIMA_ARGS
        echo "::endgroup::"
      shell: bash
    - id: docker-client-version
      run: |
        EOF=$(dd if=/dev/urandom bs=15 count=1 status=none | base64)
        echo "version<<$EOF" >> "$GITHUB_OUTPUT"
        docker version >> "$GITHUB_OUTPUT"
        echo "$EOF" >> "$GITHUB_OUTPUT"
      shell: bash
    - id: docker-compose-version
      run: |
        EOF=$(dd if=/dev/urandom bs=15 count=1 status=none | base64)
        echo "version<<$EOF" >> "$GITHUB_OUTPUT"
        docker compose version >> "$GITHUB_OUTPUT"
        echo "$EOF" >> "$GITHUB_OUTPUT"
      shell: bash
    - id: colima-version
      run: |
        EOF=$(dd if=/dev/urandom bs=15 count=1 status=none | base64)
        echo "version<<$EOF" >> "$GITHUB_OUTPUT"
        colima version >> "$GITHUB_OUTPUT"
        echo "$EOF" >> "$GITHUB_OUTPUT"
      shell: bash