name: Routine Docs

on:
  push:
    branches-ignore:
      - gh-pages

jobs:
  docs:
    env:
      ORIGIN_SITE: _origin_site
      TAGS_DIR: tags
      BRANCH_DIR: branch
    name: Generate docs
    runs-on: windows-latest
    steps:
      - name: Configure Git
        shell: powershell
        run: |
          git config --global core.autocrlf true
          git config --global user.email ([$env:GITHUB_ACTOR,"@users.noreply.github.com" -join "")
          git config --global user.name $env:GITHUB_ACTOR
          $env:BRANCH_NAME = (git rev-parse --abbrev-ref $env:GITHUB_REF) -join ""
          echo $env:BRANCH_NAME
      - name: Checkout branch
        uses: actions/checkout@v2
      - name: Checkout submodules
        run: git submodule update --init --recursive
      - name: Locate MSBuild
        uses: warrenbuckley/Setup-MSBuild@v1
      - name: Setup Nuget
        uses: warrenbuckley/Setup-Nuget@v1
      - name: Nuget Restore
        run: nuget restore
      - name: Install DocFX
        uses: crazy-max/ghaction-chocolatey@v1
        with:
          args: install docfx -y
      - name: Build docs
        shell: powershell
        working-directory: ./docs
        run: |
          Add-Content link_branch.json "{`"_gitContribute`":{`"sourceBranch`":`"$env:GITHUB_SHA`",`"apiSpecFolder`":`"docs/override`"}}"
          powershell .\build.ps1
          if ($lastexitcode -ne 0){
              throw [System.Exception] "docfx build failed with exit code $lastexitcode."
          }
          echo $env:BRANCH_NAME
      - name: Checkout current pages
        uses: actions/checkout@v2
        with:
          ref: gh-pages
          token: ${{ secrets.pagesCommitToken }}
          path: docs/${{ env.ORIGIN_SITE }}
      - name: Publish master site to GitHub pages
        shell: powershell
        working-directory: ./docs
        run: |
          Move-Item "$env:ORIGIN_SITE/.git" _site
          Move-Item "$env:ORIGIN_SITE/$env:TAGS_DIR" _site
          Move-Item "$env:ORIGIN_SITE/$env:BRANCH_DIR" _site

          cd _site
          git add -A 2>&1

          $srcMessage = (git show -s --format=%B $env:GITHUB_SHA) -join "`n"
          git commit -q -a -m "Generated Docs -- $srcMessage"
          
          git push -q origin gh-pages 
        if: env.BRANCH_NAME == 'master'
      - name: Publish branch site to GitHub pages
        shell: powershell
        working-directory: ./docs/${{ env.ORIGIN_SITE }}
        run: |
          if (-Not (Test-Path $env:BRANCH_DIR))
          { New-Item -ItemType directory -Path $env:BRANCH_DIR }

          $branchPath = "$env:BRANCH_DIR/$env:BRANCH_NAME"

          if (Test-Path $branchPath) {
            # force remove it
            Get-ChildItem -Path $branchPath -Recurse | Remove-Item -Force -Recurse
            Remove-Item $branchPath -Force
          }
              
          # move generated into place
          Move-Item ../_site $branchPath

          git add -A 2>&1

          $srcMessage = (git show -s --format=%B $env:GITHUB_SHA) -join "`n"
          git commit -q -a -m "Generated Docs ($env:BRANCH_NAME) -- $srcMessage"
          
          git push -q origin gh-pages 
        if: env.BRANCH_NAME != 'master'