name: Sync WireGuard-go

on:
  workflow_dispatch:
  schedule:
    - cron: '18 2 * * *'

jobs:
  WireGuard-go:

    name: Sync WireGuard-go to the latest

    runs-on: ubuntu-20.04

    env:
      WORKDIR: ./wireguard-go-source
      FILEDIR: wireguard-go

    steps:
      - name: Checkout code
        uses: actions/checkout@v3.3.0
        with:
          fetch-depth: 0

      - name: Check the official latest version of WireGuard-go
        run: |
          NOW=$(wget -qO- "https://api.github.com/repos/${{ github.repository }}/releases" | grep "tag_name" | grep -i "wireguard-go" | head -n 1 | sed "s/.*_v\(.*\)\".*/\1/g")
          LATEST=$(wget -qO- https://git.zx2c4.com/wireguard-go/ | grep '/wireguard-go/tag' | sed -n 1p | sed "s/.*>\([0-9.]\{1,\}\)<.*/\1/g")
          
          if [ "$LATEST" != "$NOW" ]; then
            git clone https://git.zx2c4.com/wireguard-go ${{ env.WORKDIR }}
            cp .github/wireguard-go-releaser.yml ${{ env.WORKDIR }}/.goreleaser.yml
            echo "VERSION=$LATEST" >> $GITHUB_ENV
            echo "flags=--snapshot" >> $GITHUB_ENV
            echo "DATE=$(date "+%Y/%m/%d %H:%M:%S")" >> $GITHUB_ENV
          fi
            
      - name: Set up GoReleaser
        uses: actions/setup-go@v4.0.0
        if: ${{ env.VERSION != '' }}
        with:
          go-version: "1.20"

      - name: Cross compile WireGuard-go
        uses: goreleaser/goreleaser-action@v4.2.0
        if: ${{ env.VERSION != '' }}
        with:
          distribution: goreleaser
          workdir: ${{ env.WORKDIR }}
          version: latest
          args: release --clean ${{ env.flags }}
        env:
          GITHUB_TOKEN: ${{ secrets.GH_TOKEN }}
          
      - name: Move the files and delete temp dir
        if: ${{ env.VERSION != '' }}
        run: |
          [ ! -d ${{ env.FILEDIR }} ] && mkdir -p ${{ env.FILEDIR }}
          cp -f ${{ env.WORKDIR }}/dist/*.tar.gz ${{ env.FILEDIR }}
          rm -rf ${{ env.WORKDIR }}

      - name: Upload to repository
        uses: stefanzweifel/git-auto-commit-action@v4.16.0
        if: ${{ env.VERSION != '' }}
        with:
          commit_message: Sync Wireguard-go to V${{ env.VERSION }} by Github Actions, ${{ env.DATE }}
  
      - name: Release binaries 
        uses: softprops/action-gh-release@v1
        if: ${{ env.VERSION != '' }}
        with:
          tag_name: WireGuard-go_v${{ env.VERSION }}
          files: ${{ env.FILEDIR }}/*.tar.gz