HasNewCommitsAfterLastRelease.ps1

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

Write-Host"Checking for availability of new commits after last release:"-ForegroundColor Magenta;
$releasesUrl="https://api.github.com/repos/$($owner)/$($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;
}

$lastReleaseJSON=$releasesJSON[0];
$publishedTime=$lastReleaseJSON.published_at;
$lastReleaseTag=$lastReleaseJSON.tag_name;

if ([string]::IsNullOrEmpty($publishedTime)) {
Write-Host"Unable read the last release published time"-ForegroundColor Red;
Write-Host"Last Release Data:"-ForegroundColor Red;
Write-Host-Object $lastReleaseJSON-ForegroundColor Red;
EXIT1;
}

if ([string]::IsNullOrEmpty($lastReleaseTag)) {
Write-Host"Unable read the last release tag name"-ForegroundColor Red;
Write-Host"Last Release Data:"-ForegroundColor Red;
Write-Host-Object $lastReleaseJSON-ForegroundColor Red;
EXIT1;
}

$newCommitsUrl="https://api.github.com/repos/$($owner)/$($repo)/commits?sha=$($branchName)&since=$($publishedTime)";

Write-Host"Getting commits after last release with '$($newCommitsUrl)'"-ForegroundColor Blue;
$newCommitsJSON=Invoke-RestMethod-Uri $newCommitsUrl-Method Get;

if ($newCommitsJSON.Count-gt0) {
Write-Host"There are atleast '$($newCommitsJSON.Length)' Commits in '$($branchName)' branch after last release with tag $'($lastReleaseTag)'"-ForegroundColor Green;
EXIT0;
}
else {
Write-Host"Unable to get commits after last release with '$($newCommitsUrl)'"-ForegroundColor Red;
Write-Host"NOTE: Possibly, there are no commits in '$($branchName)' branch after last release with tag '$($lastReleaseTag)'"-ForegroundColor Cyan;
Write-Host"To verify there are not commits, make a request by pasting '$($newCommitsUrl)' in your browser"-ForegroundColor Cyan;
EXIT1;
}