Apply version to assemblies from TF Build. #PS

ApplyAseemblyVersions.ps1

# ApplyVersionToAssemblies.ps1
#
# Look for a 0.0.0.0 pattern in the build number. 
# If found use it to version the assemblies.
#
# For example, if the 'Build number format' build process parameter 
# $(BuildDefinitionName)_$(Year:yyyy).$(Month).$(DayOfMonth)$(Rev:.r)
# then your build numbers come out like this:
# "Build HelloWorld_2013.07.19.1"
# This script would then apply version 2013.07.19.1 to your assemblies.
  
# Enable -Verbose option
[CmdletBinding()]
	
# Disable parameter
# Convenience option so you can debug this script or disable it in 
# your build definition without having to remove it from
# the 'Post-build script path' build process parameter.
param([switch]$Disable)
if ($PSBoundParameters.ContainsKey('Disable'))
{
	Write-Verbose "Script disabled; no actions will be taken on the files."
}
	
# Regular expression pattern to find the version in the build number 
# and then apply it to the assemblies
$VersionRegex = "\d+\.\d+\.\d+\.\d+"
	
# If this script is not running on a build server, remind user to 
# set environment variables so that this script can be debugged
if(-not $Env:TF_BUILD -and -not ($Env:TF_BUILD_SOURCESDIRECTORY -and $Env:TF_BUILD_BUILDNUMBER))
{
	Write-Error "You must set the following environment variables"
	Write-Error "to test this script interactively."
	Write-Host '$Env:TF_BUILD_SOURCESDIRECTORY - For example, enter something like:'
	Write-Host '$Env:TF_BUILD_SOURCESDIRECTORY = "C:\code\FabrikamTFVC\HelloWorld"'
	Write-Host '$Env:TF_BUILD_BUILDNUMBER - For example, enter something like:'
	Write-Host '$Env:TF_BUILD_BUILDNUMBER = "Build HelloWorld_0000.00.00.0"'
	exit 1
}
	
# Make sure path to source code directory is available
if (-not $Env:TF_BUILD_SOURCESDIRECTORY)
{
	Write-Error ("TF_BUILD_SOURCESDIRECTORY environment variable is missing.")
	exit 1
}
elseif (-not (Test-Path $Env:TF_BUILD_SOURCESDIRECTORY))
{
	Write-Error "TF_BUILD_SOURCESDIRECTORY does not exist: $Env:TF_BUILD_SOURCESDIRECTORY"
	exit 1
}
Write-Verbose "TF_BUILD_SOURCESDIRECTORY: $Env:TF_BUILD_SOURCESDIRECTORY"
	
# Make sure there is a build number
if (-not $Env:TF_BUILD_BUILDNUMBER)
{
	Write-Error ("TF_BUILD_BUILDNUMBER environment variable is missing.")
	exit 1
}
Write-Verbose "TF_BUILD_BUILDNUMBER: $Env:TF_BUILD_BUILDNUMBER"
	
# Get and validate the the version data
$VersionData = [regex]::matches($Env:TF_BUILD_BUILDNUMBER,$VersionRegex)
switch($VersionData.Count)
{
   0		
      { 
         Write-Error "Could not find version number data in TF_BUILD_BUILDNUMBER."
         exit 1
      }
   1 {}
   default 
      { 
         Write-Warning "Found more than instance of version data in TF_BUILD_BUILDNUMBER." 
         Write-Warning "Will assume first instnace is version."
      }
}
$NewVersion = $VersionData[0]
Write-Verbose "Version: $NewVersion"
	
# Apply the version to the assembly property files
$files = gci $Env:TF_BUILD_SOURCESDIRECTORY -recurse -include *Properties* | 
	?{ $_.PSIsContainer } | 
	foreach { gci -Path $_.FullName -Recurse -include AssemblyInfo.* }
if($files)
{
	Write-Verbose "Will apply $NewVersion to $files.count files."
	
	foreach ($file in $files) {
			
			
		if(-not $Disable)
		{
			$filecontent = Get-Content($file)
			attrib $file -r
			$filecontent -replace $VersionRegex, $NewVersion | Out-File $file
			Write-Verbose "$file.FullName - version applied"
		}
	}
}
else
{
	Write-Warning "Found no files."
}