name: Update DLLs 📚

on:
  workflow_dispatch:

jobs:
  update_dlls:
    name: Update Yarn Spinner DLLs
    runs-on: ubuntu-latest
    permissions:
      # We need to be able to:
      # 1. create a branch in a repo ('contents'), and
      # 2. create a pull request using that branch ('pull-requests')
      pull-requests: write
      contents: write

    steps:
      - name: Checkout Yarn Spinner for Unity
        uses: actions/checkout@v2
        with:
          path: YarnSpinner-Unity
      - name: Checkout Yarn Spinner
        uses: actions/checkout@v2
        with:
          repository: YarnSpinnerTool/YarnSpinner
          path: YarnSpinner

      - name: Setup .NET
        uses: actions/setup-dotnet@v1
        with:
          dotnet-version: |
            6.0.x
            9.0.x

      - name: Fetch all commits
        run: git fetch --unshallow
        working-directory: ./YarnSpinner

      - name: Install dotnet-assembly-alias
        run: dotnet tool install -g Alias

      # Update the assembly info for this build of YS, so that the About window is
      # appropriate
      - name: Execute GitVersion
        id: version # step id used as reference for output values
        run: ./get-version.sh
        working-directory: ./YarnSpinner

      - name: Restore dependencies
        run: dotnet restore
        working-directory: ./YarnSpinner

      - name: Build
        run: dotnet build --no-restore --configuration Release
        working-directory: ./YarnSpinner

      # Don't proceed unless we're including a build of Yarn Spinner that passes
      # its tests.
      - name: Test
        run: dotnet test --no-build --configuration Release --verbosity normal
        working-directory: ./YarnSpinner

      # We need to copy dependency DLLs into the project, but if a Unity project
      # contains multiple DLLs with the same name (even from a package), that's an
      # error. This causes problems for users who want to use, for example,
      # Google.Protobuf (especially if they want to use a different version).
      #
      # Our solution partly involves renaming the dependency DLLs to have the
      # prefix 'Yarn.', and updating all references to these renamed DLLs, using
      # dotnet-assembly-alias
      # (https://github.com/getsentry/dotnet-assembly-alias/). For more
      # information on this fix, see
      # https://github.com/YarnSpinnerTool/YarnSpinner-Unity/issues/15#issuecomment-1036162152.
      - name: Rename vendored DLLs
        run: |
          assemblyalias --target-directory "YarnSpinner/YarnSpinner.Compiler/bin/Release/netstandard2.0/" --prefix "Yarn." --assemblies-to-alias "Antlr*;Csv*;Google*;"
          assemblyalias --target-directory "YarnSpinner/YarnSpinner.Compiler/bin/Release/netstandard2.0/" --internalize --prefix "Yarn." --assemblies-to-alias "System*;Microsoft.Bcl*;Microsoft.Extensions*"

      # Copy all of the dependency DLLs into the YarnSpinner-Unity repo, except
      # for Microsoft.CSharp.dll (which is provided by Unity, so including it
      # would cause an error.)
      - name: Copy DLLs
        run: |
          cp -v YarnSpinner/YarnSpinner.Compiler/bin/Release/netstandard2.0/*.dll YarnSpinner-Unity/Runtime/DLLs
          cp -v YarnSpinner/YarnSpinner.Compiler/bin/Release/netstandard2.0/*.pdb YarnSpinner-Unity/Runtime/DLLs
          cp -v YarnSpinner/YarnSpinner.Compiler/bin/Release/netstandard2.0/*.xml YarnSpinner-Unity/Runtime/DLLs
          rm -fv YarnSpinner-Unity/Runtime/DLLs/Microsoft.CSharp.dll

      # Make the PR against YarnSpinner-Unity that merges this change
      - name: Create pull request
        uses: peter-evans/create-pull-request@v3
        with:
          path: ./YarnSpinner-Unity
          commit-message: Update Yarn Spinner DLLs to YarnSpinnerTool/YarnSpinner@${{ steps.version.outputs.ShortSha }}
          branch: update-dlls-${{ steps.version.outputs.ShortSha }}
          title: Update Yarn Spinner DLLs to latest (${{ steps.version.outputs.ShortSha }})
          body: |
            This is an automated PR made by @${{ github.actor }} that updates the precompiled Yarn Spinner DLLs (and their dependencies) to YarnSpinnerTool/YarnSpinner@${{ steps.version.outputs.ShortSha }} (v${{ steps.version.outputs.SemVer }}).