name: PR Build (Preview)
run-name:  "#${{ github.event.pull_request.number }} - ${{ github.event.pull_request.title }} @${{ github.event.pull_request.head.ref }}:${{ github.event.pull_request.head.sha }}"

on:
  pull_request:
    types: [ opened, synchronize, reopened ]
    paths:
      - "**/*.go"
      - "**/*.c"
      - "**/*.h"
      - "go.mod"
      - "go.sum"
      - ".github/workflows/build.yml"

jobs:
  context:
    runs-on: ubuntu-22.04
    steps:
      - name: Dump GitHub context
        env:
          GITHUB_CONTEXT: ${{ toJson(github) }}
        run: |
          echo "$GITHUB_CONTEXT"

  build:
    strategy:
      matrix:
        goos: [ linux ]
        goarch: [ arm64 ]
        include:
          # BEGIN Linux ARM 5 6 7
          - goos: linux
            goarch: arm
            goarm: 7
          - goos: linux
            goarch: arm
            goarm: 6
          - goos: linux
            goarch: arm
            goarm: 5
          # END Linux ARM 5 6 7
          # BEGIN Linux AMD64 v1 v2 v3
          - goos: linux
            goarch: amd64
            goamd64: v1
          - goos: linux
            goarch: amd64
            goamd64: v2
          - goos: linux
            goarch: amd64
            goamd64: v3
          # END Linux AMD64 v1 v2 v3
      fail-fast: false

    runs-on: ubuntu-22.04
    needs: [context]
    env:
      GOOS: ${{ matrix.goos }}
      GOARCH: ${{ matrix.goarch }}
      GOARM: ${{ matrix.goarm }}
      GOAMD64: ${{ matrix.goamd64 }}
      CGO_ENABLED: 0

    steps:
      - name: Checkout codebase
        uses: actions/checkout@v3
        with:
          fetch-depth: 0

      - name: Get the version
        id: get_version
        env:
          REF: ${{ github.ref }}
        run: |
          if [[ "$REF" == "refs/tags/v"* ]]; then
            tag=$(git describe --tags $(git rev-list --tags --max-count=1))
            version=${tag}
          else
            date=$(git log -1 --format="%cd" --date=short | sed s/-//g)
            count=$(git rev-list --count HEAD)
            commit=$(git rev-parse --short HEAD)
            version="unstable-$date.r${count}.$commit"
          fi
          echo "VERSION=$version" >> $GITHUB_OUTPUT
          echo "VERSION=$version" >> $GITHUB_ENV

      - name: Show workflow information
        id: get_filename
        run: |
          export _NAME=$(jq ".[\"$GOOS-$GOARCH$GOARM$GOAMD64\"].friendlyName" -r < install/friendly-filenames.json)
          echo "GOOS: $GOOS, GOARCH: $GOARCH, RELEASE_NAME: $_NAME"
          echo "ASSET_NAME=$_NAME" >> $GITHUB_OUTPUT
          echo "ASSET_NAME=$_NAME" >> $GITHUB_ENV

      - name: Set up Go
        uses: actions/setup-go@v3
        with:
          go-version: '^1.19'

      - name: Install Dependencies
        run: |
          sudo apt-get update -y
          sudo apt-get install -y clang-15 llvm-15

      - name: Get project dependencies
        run: |
          git submodule update --init --recursive
          GOMODCACHE="${PWD}"/go-mod go mod download -modcacherw
          find ./go-mod/ -maxdepth 1 ! -name "cache" ! -name "go-mod" -exec rm -rf {} \;
          sed -i 's/#export GOMODCACHE=$(PWD)\/go-mod/export GOMODCACHE=$(PWD)\/go-mod/' Makefile

      - name: Build dae
        run: |
          mkdir -p ./build/
          export CGO_ENABLED=0
          export GOFLAGS="-trimpath -modcacherw"
          export CFLAGS="-D__REMOVE_BPF_PRINTK"
          export OUTPUT=build/dae-$ASSET_NAME
          export VERSION=${{ steps.get_version.outputs.VERSION }}
          export CLANG=clang-15
          export STRIP=llvm-strip-15
          make
          cp ./install/dae.service ./build/
          cp ./example.dae ./build/
          curl -L -o ./build/geoip.dat https://github.com/v2fly/geoip/releases/latest/download/geoip.dat
          curl -L -o ./build/geosite.dat https://github.com/v2fly/domain-list-community/releases/latest/download/dlc.dat

      - name: Smoking test
        if: matrix.goarch == 'amd64' && matrix.goamd64 == 'v1'
        run: ./build/dae-$ASSET_NAME --version

      - name: Create binary ZIP archive and Signature
        run: |
          pushd build || exit 1
          zip -9vr ../dae-$ASSET_NAME.zip .
          popd || exit 1
          FILE=./dae-$ASSET_NAME.zip
          DGST=$FILE.dgst
          md5sum        $FILE >>$DGST
          shasum -a 1   $FILE >>$DGST
          shasum -a 256 $FILE >>$DGST
          shasum -a 512 $FILE >>$DGST

      - name: Upload files to Artifacts
        uses: actions/upload-artifact@v3
        with:
          name: dae-${{ steps.get_filename.outputs.ASSET_NAME }}.zip
          path: build/*