# This is a hacky workaround to (at least) get some analyzer warnings in the Azure Devops build summary / build log for .NET Core projects
# Be sure to change the DotNetCoreInstaller version to the needed version
# Explanation:
# 'dotnet build --no-incremental /flp:v=q /flp:logfile=MyLog.log'
# no-incremental => makes sure that the solution is being rebuild instead of just build.
# /flp:v=q => sets the verbosity to quiet (= errors + warnings) for the logging. The errors + warnings is what we need for the powershell task.
# /flp:logfile=MyLog.log => the name of the logfile, if not specified the default value of msbuild.log is used.

# The display build issues task gets the content of the build log file (which only contain the needed errors + warnings)
# Then a lot of magical regex is done which results in some fancy output in the build summary.
# The build Log tab still has an open issue about only showing a max of 10 warnings, however in the Summary tab all the warnings are shown.

trigger: none

pool:
  vmImage: 'windows-latest'

variables:
  solution: '**/*.sln'
  buildPlatform: 'Any CPU'
  buildConfiguration: 'Release'

steps:
- task: DotNetCoreInstaller@0
  displayName: 'Use .NET Core sdk 2.2.102'
  inputs:
    version: 2.2.102

- task: DotNetCoreCLI@2
  displayName: 'Dotnet build solution'
  inputs:
    command: build
    arguments: '--no-incremental /flp:v=q /flp:logfile=MyLog.log'
    projects: '$(solution)'

- task: PowerShell@2
  displayName: 'Display build issues'
  condition: succeededOrFailed()
  inputs:
    targetType: 'inline'
    script: '
      $output = Get-Content -Path "$(System.DefaultWorkingDirectory)/MyLog.log";
      $warnings = $output | Select-String -Pattern ".*:\s";
      $hasErrors = $false;

      [regex]$issueTypeRegex = "(warning|error)";
      [regex]$issueLocationRegex = "(\d+,\d+)";
      [regex]$sourcePathRegex = "^[^/(]*";
      [regex]$issueCodeRegex = "(?<=(warning|error) )[A-Za-z0-9]+";
      [regex]$messageRegex = "(?<=((warning|error) [A-Za-z0-9]+: )).*";

      $warnings | Foreach-Object {
        $issueLocationMatch = $issueLocationRegex.Matches($_)[0];
        $issueLocation = $issueLocationMatch.value.split(",");
        $issueType = $issueTypeRegex.Matches($_)[0];
        $sourcepath = $sourcePathRegex.Matches($_)[0];
        $linenumber = $issueLocation[0];
        $columnnumber = $issueLocation[1];
        $issueCode = $issueCodeRegex.Matches($_)[0];
        $message = $messageRegex.Matches($_)[0];

        Write-Host "##vso[task.logissue type=$issueType;sourcepath=$sourcepath;linenumber=$linenumber;columnnumber=$columnnumber;code=$issueCode;]$message";
        if($issueType.Value -eq "error") { $hasErrors = $true; }
      };
      if($warnings.Count -gt 0 -and $hasErrors -eq $true) { Write-Host "##vso[task.complete result=Failed;]There are build errors"; }
      elseif($warnings.Count -gt 0 -and $hasErrors -eq $false) { Write-Host "##vso[task.complete result=SucceededWithIssues;]There are build warnings"; } '

- task: DotNetCoreCLI@2
  displayName: "Dotnet test solution"
  inputs:
    command: 'test'
    projects: '$(solution)'