action.yml

name: "Setup Elixir and Rust Environment"
description: "Sets up Elixir/OTP and Rust with comprehensive caching"

inputs:
  cache-key-suffix:
    description: "Optional suffix for cache keys (useful for matrix jobs)"
    required: false
    default: ""
  skip-rust:
    description: "Skip Rust setup (default: false)"
    required: false
    default: "false"
  elixir-version:
    description: "Explicit Elixir version (overrides .tool-versions)"
    required: false
    default: ""
  otp-version:
    description: "Explicit OTP version (overrides .tool-versions)"
    required: false
    default: ""

outputs:
  otp-version:
    description: "OTP version from setup-beam"
    value: ${{ steps.setup-beam.outputs.otp-version }}
  elixir-version:
    description: "Elixir version from setup-beam"
    value: ${{ steps.setup-beam.outputs.elixir-version }}

runs:
  using: composite
  steps:
    - name: Setup Elixir/OTP
      id: setup-beam
      uses: erlef/setup-beam@v1
      with:
        version-file: ${{ inputs.elixir-version == '' && '.tool-versions' || '' }}
        version-type: ${{ inputs.elixir-version == '' && 'strict' || '' }}
        elixir-version: ${{ inputs.elixir-version }}
        otp-version: ${{ inputs.otp-version }}
        # builds.hex.pm CDN cert trips OTP TLS validation (key_usage_mismatch); fall back to jsdelivr
        hexpm-mirrors: |
          https://builds.hex.pm
          https://cdn.jsdelivr.net/hex

    - name: Cache Elixir Dependencies
      uses: actions/cache@v5
      with:
        path: |
          _build
          deps
          priv
        key: mix-${{ runner.os }}-${{ steps.setup-beam.outputs.otp-version }}-${{ steps.setup-beam.outputs.elixir-version }}-${{ hashFiles('**/mix.lock', 'native/dprint_markdown_formatter/Cargo.lock') }}${{ inputs.cache-key-suffix }}
        restore-keys: |
          mix-${{ runner.os }}-${{ steps.setup-beam.outputs.otp-version }}-${{ steps.setup-beam.outputs.elixir-version }}${{ inputs.cache-key-suffix }}

    - name: Install Dependencies
      run: mix deps.get
      shell: bash

    - name: Setup Rust
      if: inputs.skip-rust != 'true'
      uses: actions-rust-lang/setup-rust-toolchain@v1

    - name: Cache Rust Dependencies
      if: inputs.skip-rust != 'true'
      uses: actions/cache@v5
      with:
        path: |
          ~/.cargo/registry
          ~/.cargo/git
          native/dprint_markdown_formatter/target
        key: ${{ runner.os }}-cargo-${{ hashFiles('native/dprint_markdown_formatter/Cargo.lock') }}${{ inputs.cache-key-suffix }}
        restore-keys: |
          ${{ runner.os }}-cargo-${{ inputs.cache-key-suffix }}