conda-express 0.2.0

A lightweight, single-binary conda bootstrapper — powered by rattler
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name: "Build cx (conda-express)"
description: >
  Build a custom cx bootstrapper binary with your choice of conda packages
  baked in. Runs on the current runner — use a matrix strategy for
  multi-platform builds.
branding:
  icon: package
  color: green

inputs:
  packages:
    description: >
      Comma-separated conda package specs to include in the bootstrapper.
      Example: "python >=3.12, conda >=25.1, numpy, pandas".
      When empty, uses the default packages from conda-express.
    required: false
    default: ""
  channels:
    description: >
      Comma-separated conda channels.
      When empty, uses the default (conda-forge).
    required: false
    default: ""
  exclude:
    description: >
      Comma-separated packages to exclude (along with their exclusive
      dependencies). When empty, uses the default exclusions.
    required: false
    default: ""
  ref:
    description: "Git ref of conda-express to build from (tag, branch, or SHA)."
    required: false
    default: "main"

outputs:
  binary-path:
    description: "Absolute path to the built cx binary."
    value: ${{ steps.stage.outputs.binary_path }}
  asset-name:
    description: "Platform-qualified asset name (e.g. cx-aarch64-apple-darwin)."
    value: ${{ steps.stage.outputs.asset_name }}

runs:
  using: composite
  steps:
    - name: Checkout conda-express
      uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
      with:
        repository: jezdez/conda-express
        ref: ${{ inputs.ref }}
        path: .cx-build

    - name: Setup pixi
      uses: prefix-dev/setup-pixi@82d477f15f3a381dbcc8adc1206ce643fe110fb7 # v0.9.3
      with:
        manifest-path: .cx-build/pixi.toml
        cache: true

    - name: Setup Rust cache
      uses: Swatinem/rust-cache@9d47c6ad4b02e050fd481d890b2ea34778fd09d6 # v2.7.8
      with:
        workspaces: .cx-build

    - name: Build cx
      shell: bash
      env:
        CX_PACKAGES: ${{ inputs.packages }}
        CX_CHANNELS: ${{ inputs.channels }}
        CX_EXCLUDE: ${{ inputs.exclude }}
      working-directory: .cx-build
      run: pixi run build

    - name: Stage binary
      id: stage
      shell: bash
      run: |
        TARGET="$(rustc -vV | grep '^host:' | cut -d' ' -f2)"
        if [[ "$TARGET" == *"windows"* ]]; then
          BIN_NAME="cx.exe"
          ASSET_NAME="cx-${TARGET}.exe"
        else
          BIN_NAME="cx"
          ASSET_NAME="cx-${TARGET}"
        fi
        BINARY_PATH="${GITHUB_WORKSPACE}/${ASSET_NAME}"
        cp ".cx-build/target/release/${BIN_NAME}" "${BINARY_PATH}"
        sha256sum "${BINARY_PATH}" > "${BINARY_PATH}.sha256"
        echo "binary_path=${BINARY_PATH}" >> "$GITHUB_OUTPUT"
        echo "asset_name=${ASSET_NAME}" >> "$GITHUB_OUTPUT"