CalculateNewProductionVersion.ps1

Param(
 [string]$owner,
 [string]$repo,
 [string]$previewStr
)

Write-Host"Calculating new Production Version:"-ForegroundColor Magenta;

$newVersionStr;

$releasesUrl="https://api.github.com/repos/$($owner)/$($repo)/releases";

Write-Host"Getting list of releases with '$($releasesUrl)'"-ForegroundColor Blue;
$releasesJSON=Invoke-RestMethod-Uri $releasesUrl-Method Get;

if ($releasesJSON.Count-eq0) {
Write-Host"Unable to get releases list with '$($releasesUrl)'"-ForegroundColor Red;
Write-Host"NOTE: This Script cannot handle the first release"-ForegroundColor Cyan;
EXIT1;
}

$latestReleaseJSON=$releasesJSON[0]; 
$latestReleaseVersionStr=$latestReleaseJSON.tag_name;
$isPreRelease=$latestReleaseJSON.prerelease;

if ([string]::IsNullOrEmpty($latestReleaseVersionStr)) {
Write-Host"Unable read the latest release tag name"-ForegroundColor Red;
Write-Host"Latest Release Data:"-ForegroundColor Cyan;
Write-Host-Object $latestReleaseJSON-ForegroundColor Cyan;
EXIT1;
}

if ([string]::IsNullOrEmpty($isPreRelease)) {
Write-Host"Unable read the latest release is pre-release or not"-ForegroundColor Red;
Write-Host"Latest Release Data:"-ForegroundColor Cyan;
Write-Host-Object $latestReleaseJSON-ForegroundColor Cyan;
EXIT1;
}

$isPreRelease=$isPreRelease-as [bool];

if (!$isPreRelease) {
Write-Host"Preview is not released for the latest changes in '$($branchName)' branch"-ForegroundColor Red;
Write-Host"Latest Release Data:"-ForegroundColor Cyan;
Write-Host-Object $latestReleaseJSON-ForegroundColor Cyan;
EXIT1;
}

$versionArr=$latestReleaseVersionStr.split("-");

if ([string]::IsNullOrEmpty($versionArr[1])) {
Write-Host"Latest release is a Preview release but the '$($previewStr)' is missing in version string $($latestReleaseVersionStr)"-ForegroundColor Red;
Write-Host"Latest Release Data:"-ForegroundColor Cyan;
Write-Host-Object $latestReleaseJSON-ForegroundColor Cyan;
EXIT1;
}

$newVersionStr=$versionArr[0];

Write-Host"Current version is '$($latestReleaseVersionStr)'"-ForegroundColor Blue;
Write-Host"New calculated version is '$($newVersionStr)'"-ForegroundColor Green;

Write-Host"##vso[task.setvariable variable=NEW_VERSION_STRING]$($newVersionStr)";

Write-Host"Updated new version in global variable"-ForegroundColor Green;