Script for starting SonarQube differently for PR or Master Branch in CI using PowerShell

blog_github_sonarqube_start_script.ps1

$github_branch_refs_parts = "%teamcity.build.branch%" -split "/"
$is_pr = ($github_branch_refs_parts.Count -eq 2 -and $github_branch_refs_parts[1] -eq "merge")

if (-Not $is_pr) {
    Write-Host "Running SonarQube in master branch mode"    
    SonarQube.Scanner.MSBuild.exe begin /k:"%sonar.project%" /d:"sonar.host.url=%sonar.host.url%" /d:sonar.cs.dotcover.reportsPaths="dotCover.html" /v:"%build.number%"
} else {
    Write-Host "Running SonarQube in PR Mode"

    $pull_request_number = $github_branch_refs_parts[0]
    $repo = "%repo_owner%" + "/" + "%name%"

    $command = 'SonarQube.Scanner.MSBuild.exe' +
    ' begin' + 
    ' /k:' + '%sonar_project%' + 
    ' /v:' + "%build_number%" +
    ' /d:sonar.host.url=' + "%sonar_hosturl%" +
    ' /d:sonar.github.pullRequest=' + $pull_request_number +
    ' /d:sonar.github.repository=' + $repo +
    ' /d:sonar.github.oauth=' + "%sonarqube_github_oauth_token%" +
    ' /d:sonar.analysis.mode=' + "preview" +
    ' /d:sonar.scanAllFiles=' + "true" +
    ' /d:sonar.github.endpoint=' + "%github_api_endpoint%"

    Write-Host $command 
    Invoke-Expression $command
}