powershell helper functions for manipulating nuspec

nuspec-tools.ps1

function Get-NuspecVersion($nuspec = $null) {
	if ([string]::IsNullOrEmpty($nuspec)) {
		$nuspec = Get-ChildItem . -Filter *.nuspec | select -First 1
    }
    $content = Get-Content $nuspec
    $verRegex = "<version>(.*)</version>"
    [string]$line = $content | where { $_ -match $verRegex } | select -First 1
    $ver = $matches[1]
    return $ver
}

function Set-NuspecVersion([string] $version, $nuspec = $null) {
	if ($nuspec -eq $null) {
		$nuspec = Get-ChildItem . -Filter *.nuspec | select -First 1
    }
    $content = Get-Content $nuspec
    $content2 = $content | foreach { 
        if ($_ -match "<version>(.*)</version>") {       
            $_.Replace( $matches[0], "<version>$version</version>")
        } else {
            $_
        }
    }
    $content2 | Set-Content $nuspec     
}

function Incremet-NuspecVersion($nuspec = $null) {
	if ($nuspec -eq $null) {
		$nuspec = Get-ChildItem . -Filter *.nuspec | select -First 1
    }
   
    $ver = Get-NuspecVersion $nuspec
    $vernums = $ver.Split('.')
    $lastNum = [int]::Parse($vernums[$vernums.Count-1])
    $lastNum++
    $vernums[$vernums.Count-1] = $lastNum.ToString()
    $ver2 = [string]::Join(".", $vernums)
    Set-NuspecVersion -version $ver2 -nuspec $nuspec   
}

function Incremet-Version($nuspec = $null) {
    Incremet-NuspecVersion -nuspec $nuspec
}