Few Lines of Code - Appveyor init powershell script

gistfile1.txt

$ErrorActionPreference='Stop';

$branch = $env:APPVEYOR_REPO_BRANCH;
$buildNumber = $env:APPVEYOR_BUILD_NUMBER;
$num = '(0|[1-9]{1}[0-9]{0,})';
$rx = "^[a-z\-]+/v(?'ver'$num\.$num\.$num)(-(?'preSpec'[a-zA-Z]{1,}[0-9]{0,})){0,1}$";
$match = [regex]::match($branch, $rx);
if (!$match.Success)
{
    throw "Branch name is not correct semver (1.0.0): " + $branch;
}
$version = $match.Groups['ver'].Value;
$preReleaseSpec = $match.Groups['preSpec'].Value;
$assemblyVersion = $version + ".0";
$fileVersion = $version + "." + $buildNumber;
$informationalVersion = $version;

if ("" -eq $preReleaseSpec)
{
    $informationalVersion = $version + "." + $buildNumber;
}
else
{
    $informationalVersion = $version + "-" + $preReleaseSpec + "-" + $buildNumber.PadLeft(6,'0');
}
$env:release_AssemblyVersion = $assemblyVersion;
$env:release_FileVersion = $fileVersion;
$env:release_InformationalVersion = $informationalVersion;

Write-Output "Versioning for a nuget release"
Write-Output "env:release_AssemblyVersion = $assemblyVersion"
Write-Output "env:release_FileVersion = $fileVersion"
Write-Output "env:release_InformationalVersion = $informationalVersion"

$displayVersion = "debug 01 " + $informationalVersion

Update-AppveyorBuild -Version $displayVersion