Creates a build number from the current date, build counter and branch name where branch name starts with a story name/number prefix.

buildNumber.ps1

# Generated a build number in the format year.month.day.buildCounter-story 
# where story is derived from the branch name
#
# Parameters are expected in the following order:
#  1. build counter
#  2. branch name in the format develop | XXXX-ddd

param (
    [parameter(Mandatory=$true)] [int]$buildCounter,
    [parameter(Mandatory=$true)] [string]$branch
)

try
{
    if ($branch -eq "develop")
    {
        $branch = ""    
    }
    else
    {
        # strip path root
        $branch = [regex]::Replace($branch, "^(?:.+\/)", "")

        $match = [regex]::Match($branch, "^([a-zA-Z]{3,4})(?:[-_ ])?(\d+)")
        if ($match.Success)
        {
            $branch = $('-{0}{1}'-f $match.Groups[1].Value, $match.Groups[2].Value)
        }
    }

    $buildNumber = $([DateTime]::UtcNow.ToString('yyyy.M.d') + '.' + $buildCounter + $branch)

    Write-Host $("##teamcity[message text='buildNumber: {0}']" -f $buildNumber)
    Write-Host $("##teamcity[buildNumber '{0}']" -f $buildNumber)
} Catch {
    Write-Host $("##teamcity[message text='{0}' status='ERROR']" -f $_.Exception.Message.Replace("]", "|]"))
    [System.Environment]::Exit(1)
}