# Mutilated beyond recognition from the example at:
# https://docs.microsoft.com/azure/devops/pipelines/languages/go

trigger:
  - v2

schedules:
- cron: "0 0 * * *"
  displayName: Daily midnight fuzzing
  branches:
    include:
    - v2
  always: true

variables:
  GOROOT: $(gorootDir)/go
  GOPATH: $(system.defaultWorkingDirectory)/gopath
  GOBIN:  $(GOPATH)/bin
  modulePath: '$(GOPATH)/src/github.com/$(build.repository.name)'
  # TODO: Remove once it's enabled by default
  GO111MODULE: on

jobs:
- job: crossPlatformTest
  displayName: "Cross-Platform Tests"
  strategy:
    matrix:
      linux:
        imageName: ubuntu-16.04
        gorootDir: /usr/local
      mac:
        imageName: macos-10.13
        gorootDir: /usr/local
      windows:
        imageName: windows-2019
        gorootDir: C:\
  pool:
    vmImage: $(imageName)
  
  steps:
  - bash: |
      latestGo=$(curl "https://golang.org/VERSION?m=text")
      echo "##vso[task.setvariable variable=LATEST_GO]$latestGo"
      echo "Latest Go version: $latestGo"
    displayName: "Get latest Go version"

  - bash: |
      sudo rm -f $(which go)
      echo '##vso[task.prependpath]$(GOBIN)'
      echo '##vso[task.prependpath]$(GOROOT)/bin'
      mkdir -p '$(modulePath)'
      shopt -s extglob
      shopt -s dotglob
      mv !(gopath) '$(modulePath)'
    displayName: Remove old Go, set GOBIN/GOROOT, and move project into GOPATH

  # Install Go (this varies by platform)
  - bash: |
      wget "https://dl.google.com/go/$(LATEST_GO).linux-amd64.tar.gz"
      sudo tar -C $(gorootDir) -xzf "$(LATEST_GO).linux-amd64.tar.gz"
    condition: eq( variables['Agent.OS'], 'Linux' )
    displayName: Install Go on Linux

  - bash: |
      wget "https://dl.google.com/go/$(LATEST_GO).darwin-amd64.tar.gz"
      sudo tar -C $(gorootDir) -xzf "$(LATEST_GO).darwin-amd64.tar.gz"
    condition: eq( variables['Agent.OS'], 'Darwin' )
    displayName: Install Go on macOS

  # The low performance is partly due to PowerShell's attempt to update the progress bar. Disabling it speeds up the process.
  # Reference: https://github.com/PowerShell/PowerShell/issues/2138
  - powershell: |
      $ProgressPreference = 'SilentlyContinue'
      Write-Host "Downloading Go..."
      (New-Object System.Net.WebClient).DownloadFile("https://dl.google.com/go/$(LATEST_GO).windows-amd64.zip", "$(LATEST_GO).windows-amd64.zip")
      Write-Host "Extracting Go... (I'm slow too)"
      7z x "$(LATEST_GO).windows-amd64.zip" -o"$(gorootDir)"
    condition: eq( variables['Agent.OS'], 'Windows_NT' )
    displayName: Install Go on Windows

  - bash: curl -sfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(go env GOPATH)/bin v1.19.1
    displayName: Install golangci-lint

  - script: |
      go get github.com/axw/gocov/gocov
      go get github.com/AlekSi/gocov-xml
      go get -u github.com/jstemmer/go-junit-report
    displayName: Install test and coverage analysis tools

  - bash: |
      printf "Using go at: $(which go)\n"
      printf "Go version: $(go version)\n"
      printf "\n\nGo environment:\n\n"
      go env
      printf "\n\nSystem environment:\n\n"
      env
    displayName: Print Go version and environment

  - script: |
      go get -v -t -d ./...
      mkdir test-results
    workingDirectory: '$(modulePath)'
    displayName: Get dependencies

  # its behavior is governed by .golangci.yml
  - script: |
      (golangci-lint run --out-format junit-xml) > test-results/lint-result.xml
      exit 0
    workingDirectory: '$(modulePath)'
    continueOnError: true
    displayName: Run lint check

  - script: |
      (go test -v -coverprofile=cover-profile.out -race ./... 2>&1) > test-results/test-result.out
    workingDirectory: '$(modulePath)'
    continueOnError: true
    displayName: Run tests

  - script: |
      mkdir coverage
      gocov convert cover-profile.out > coverage/coverage.json
      # Because Windows doesn't work with input redirection like *nix, but output redirection works.
      (cat ./coverage/coverage.json | gocov-xml) > coverage/coverage.xml 
    workingDirectory: '$(modulePath)'
    displayName: Prepare coverage reports

  - script: |
      (cat ./test-results/test-result.out | go-junit-report) > test-results/test-result.xml
    workingDirectory: '$(modulePath)'
    displayName: Prepare test report

  - task: PublishCodeCoverageResults@1
    displayName: Publish test coverage report
    inputs:
      codeCoverageTool: Cobertura 
      summaryFileLocation: $(modulePath)/coverage/coverage.xml

  - task: PublishTestResults@2
    displayName: Publish unit test
    inputs:
      testResultsFormat: 'JUnit'
      testResultsFiles: $(modulePath)/test-results/test-result.xml
      testRunTitle: $(agent.OS) Unit Test
      mergeTestResults: false

  - task: PublishTestResults@2
    displayName: Publish lint results
    inputs:
      testResultsFormat: 'JUnit'
      testResultsFiles: $(modulePath)/test-results/lint-result.xml
      testRunTitle: $(agent.OS) Lint
      mergeTestResults: false

  - bash: |
      exit 1
    condition: eq(variables['Agent.JobStatus'], 'SucceededWithIssues')
    displayName: Coerce correct build result

- job: fuzzing
  displayName: 'Fuzzing'
  # Only run this job on schedules or PRs for non-forks.
  condition: or(eq(variables['System.PullRequest.IsFork'], 'False'), eq(variables['Build.Reason'], 'Schedule') )
  strategy:
    matrix:
      linux:
        imageName: ubuntu-16.04
        gorootDir: /usr/local
  pool:
    vmImage: $(imageName)

  steps:
  - bash: |
      latestGo=$(curl "https://golang.org/VERSION?m=text")
      echo "##vso[task.setvariable variable=LATEST_GO]$latestGo"
      echo "Latest Go version: $latestGo"
    displayName: "Get latest Go version"

  - bash: |
      sudo rm -f $(which go)
      echo '##vso[task.prependpath]$(GOBIN)'
      echo '##vso[task.prependpath]$(GOROOT)/bin'
      mkdir -p '$(modulePath)'
      shopt -s extglob
      shopt -s dotglob
      mv !(gopath) '$(modulePath)'
    displayName: Remove old Go, set GOBIN/GOROOT, and move project into GOPATH

  - bash: |
      wget "https://dl.google.com/go/$(LATEST_GO).linux-amd64.tar.gz"
      sudo tar -C $(gorootDir) -xzf "$(LATEST_GO).linux-amd64.tar.gz"
    condition: eq( variables['Agent.OS'], 'Linux' )
    displayName: Install Go on Linux

  - bash: |
      # Install Clang-7.0 because other versions seem to be missing the file libclang_rt.fuzzer-x86_64.a
      sudo add-apt-repository "deb http://apt.llvm.org/xenial/ llvm-toolchain-xenial-7 main"
      wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | sudo apt-key add -
      sudo apt update && sudo apt install -y clang-7 lldb-7 lld-7

      go get -v github.com/dvyukov/go-fuzz/go-fuzz github.com/dvyukov/go-fuzz/go-fuzz-build
      wget -q -O fuzzit https://github.com/fuzzitdev/fuzzit/releases/download/v2.4.74/fuzzit_Linux_x86_64
      chmod a+x fuzzit
      mv fuzzit $(GOBIN)
    displayName: Download go-fuzz tools and the Fuzzit CLI, and move Fuzzit CLI to GOBIN
    condition: and(eq(variables['System.PullRequest.IsFork'], 'False') , eq( variables['Agent.OS'], 'Linux' ))

  - bash: |
      declare -A fuzzers_funcs=(\
        ["./admin_fuzz.go"]="FuzzAdmin" \
        ["./caddyconfig/httpcaddyfile/adapter_fuzz.go"]="FuzzHTTPCaddyfileAdapter" \
        ["./caddyconfig/httpcaddyfile/addresses_fuzz.go"]="FuzzParseAddress" \
        ["./caddyconfig/caddyfile/parse_fuzz.go"]="FuzzParseCaddyfile" \
        ["./listeners_fuzz.go"]="FuzzParseNetworkAddress" \
        ["./replacer_fuzz.go"]="FuzzReplacer" \
      )

      declare -A fuzzers_targets=(\
        ["./admin_fuzz.go"]="admin" \
        ["./caddyconfig/httpcaddyfile/adapter_fuzz.go"]="caddyfile-adapter" \
        ["./caddyconfig/httpcaddyfile/addresses_fuzz.go"]="parse-address" \
        ["./caddyconfig/caddyfile/parse_fuzz.go"]="parse-caddyfile" \
        ["./listeners_fuzz.go"]="parse-listen-addr" \
        ["./replacer_fuzz.go"]="replacer" \
      )

      fuzz_type="regression"
      if [[ $(Build.Reason) == "Schedule" ]]; then
        fuzz_type="fuzzing"
      fi

      for f in $(find . -name \*_fuzz.go); do
        FUZZER_DIRECTORY=$(dirname $f)
        echo "go-fuzz-build func ${fuzzers_funcs[$f]} residing in $f"
        go-fuzz-build -func "${fuzzers_funcs[$f]}" -libfuzzer -o "$FUZZER_DIRECTORY/${fuzzers_targets[$f]}.a" $FUZZER_DIRECTORY
        echo "Generating fuzzer binary of func ${fuzzers_funcs[$f]} which resides in $f"
        clang-7 -fsanitize=fuzzer "$FUZZER_DIRECTORY/${fuzzers_targets[$f]}.a" -o "$FUZZER_DIRECTORY/${fuzzers_targets[$f]}"
        fuzzit create job caddyserver/${fuzzers_targets[$f]} $FUZZER_DIRECTORY/${fuzzers_targets[$f]} --api-key ${FUZZIT_API_KEY} --type "${fuzz_type}" --branch "${SYSTEM_PULLREQUEST_SOURCEBRANCH}" --revision "${BUILD_SOURCEVERSION}"
        echo "Completed $f"
      done
    env:
      FUZZIT_API_KEY: $(FUZZIT_API_KEY)
    workingDirectory: '$(modulePath)'
    displayName: Generate fuzzers & submit them to Fuzzit