name: Build and publish release assets

on:
  release:
    types: [created]
  workflow_dispatch:
    inputs:
      version:
        description: 'Commit-like version of github/licensed to build package at'
        required: true
      release_tag:
        description: 'Release tag to upload built packages to'
        required: false

jobs:
  vars:
    name: "Gather values for remainder of steps"
    runs-on: ubuntu-latest
    outputs:
      version: ${{ steps.get_version.outputs.result }}
      upload_url: ${{ steps.get_url.outputs.result }}
      ref: ${{ steps.get_ref.outputs.result }}
    steps:
      - id: get_version
        name: Get package version
        uses: actions/github-script@v3
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          result-encoding: string
          script: |
            let version = "${{ github.event.release.tag_name }}"
            if (!version) {
              version = "${{ github.event.inputs.version }}"
            }

            if (!version) {
              throw new Error("unable to find package build version")
            }

            return version

      - id: get_url
        name: Get release upload url
        uses: actions/github-script@v3
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          result-encoding: string
          script: |
            let uploadUrl = "${{ github.event.release.upload_url}}"
            const tag = "${{ github.event.inputs.release_tag }}"
            if (!uploadUrl && tag) {
              const { data: release } = await github.repos.getReleaseByTag({
                ...context.repo,
                tag
              })

              if (!release.upload_url) {
                throw new Error("unable to find a release upload url")
              }

              uploadUrl = release.upload_url
            }

            return uploadUrl

      - id: get_ref
        name: Get checkout ref for custom build scripts
        uses: actions/github-script@v3
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          result-encoding: string
          script: |
            let ref = "${{ github.event.release.tag_name }}"
            if (!ref) {
              ref = "${{ github.event.ref }}".replace(/refs\/[^\/]+\//, '')
            }

            if (!ref) {
              throw new Error("unable to find a ref for action")
            }

            return ref

  package_linux:
    needs: vars
    runs-on: ubuntu-18.04
    steps:
    - uses: actions/checkout@v2
      with:
        # checkout at the ref for the action, separate from the target build version
        # this allows running build scripts independent of the target version
        ref: ${{needs.vars.outputs.ref}}
        fetch-depth: 0

    - name: Set up Ruby 2.6
      uses: ruby/setup-ruby@v1
      with:
        ruby-version: 2.6

    - name: Build package
      run: script/packages/linux
      env:
        VERSION: ${{needs.vars.outputs.version}}

    - uses: actions/upload-artifact@v2
      with:
        name: ${{needs.vars.outputs.version}}-linux
        path: pkg/${{needs.vars.outputs.version}}/licensed-${{needs.vars.outputs.version}}-linux-x64.tar.gz

  package_mac:
    needs: vars
    runs-on: macOS-latest
    steps:
    - uses: actions/checkout@v2
      with:
        # checkout at the ref for the action, separate from the target build version
        # this allows running build scripts independent of the target version
        ref: ${{needs.vars.outputs.ref}}
        fetch-depth: 0

    - name: Set up Ruby 2.6
      uses: ruby/setup-ruby@v1
      with:
        ruby-version: 2.6

    - name: Build package
      run: script/packages/mac
      env:
        VERSION: ${{needs.vars.outputs.version}}

    - uses: actions/upload-artifact@v2
      with:
        name: ${{needs.vars.outputs.version}}-darwin
        path: pkg/${{needs.vars.outputs.version}}/licensed-${{needs.vars.outputs.version}}-darwin-x64.tar.gz

  build_gem:
    needs: vars
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v2
      with:
        # building a gem doesn't use a different ref from the version input
        ref: ${{needs.vars.outputs.version}}

    - name: Set up Ruby 2.6
      uses: ruby/setup-ruby@v1
      with:
        ruby-version: 2.6

    - name: Build gem
      run: gem build licensed.gemspec -o licensed-${{needs.vars.outputs.version}}.gem

    - uses: actions/upload-artifact@v2
      with:
        name: ${{needs.vars.outputs.version}}-gem
        path: licensed-${{needs.vars.outputs.version}}.gem

  upload_packages:
    if: ${{ needs.vars.outputs.upload_url != '' }}
    runs-on: ubuntu-latest
    needs: [vars, package_linux, package_mac, build_gem]

    steps:
    - name: Set up Ruby 2.6
      uses: ruby/setup-ruby@v1
      with:
        ruby-version: 2.6

    - name: Download linux package
      uses: actions/download-artifact@v2
      with:
        name: ${{needs.vars.outputs.version}}-linux

    - name: Download macOS package
      uses: actions/download-artifact@v2
      with:
        name: ${{needs.vars.outputs.version}}-darwin

    - name: Download gem
      uses: actions/download-artifact@v2
      with:
        name: ${{needs.vars.outputs.version}}-gem

    - name: Publish linux package
      uses: actions/upload-release-asset@v1
      env:
        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
      with:
        upload_url: ${{ needs.vars.outputs.upload_url }}
        asset_path: ./licensed-${{needs.vars.outputs.version}}-linux-x64.tar.gz
        asset_name: licensed-${{needs.vars.outputs.version}}-linux-x64.tar.gz
        asset_content_type: application/gzip

    - name: Publish mac package
      uses: actions/upload-release-asset@v1
      env:
        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
      with:
        upload_url: ${{ needs.vars.outputs.upload_url }}
        asset_path: ./licensed-${{needs.vars.outputs.version}}-darwin-x64.tar.gz
        asset_name: licensed-${{needs.vars.outputs.version}}-darwin-x64.tar.gz
        asset_content_type: application/gzip

    - name: Publish gem to RubyGems
      run: |
        mkdir -p $HOME/.gem
        touch $HOME/.gem/credentials
        chmod 0600 $HOME/.gem/credentials
        printf -- "---\n:rubygems_api_key: ${RUBYGEMS_API_KEY}\n" > $HOME/.gem/credentials
        gem push $GEM
      env:
        RUBYGEMS_API_KEY: ${{secrets.RUBYGEMS_AUTH_TOKEN}}
        GEM: licensed-${{needs.vars.outputs.version}}.gem