$useLegacy = ($PSVersionTable.PSVersion -as [version]) -le ("2.0" -as [version])

if ($useLegacy){

$inputDir = Split-Path -Parent $MyInvocation.MyCommand.Path

}

else {

$inputDir = $PSScriptRoot

}

$theRootestRoot = Split-Path -Parent $inputDir;

$outputDir = Join-Path -Path $theRootestRoot -ChildPath \_Build\ProductInfo

$changeLogFile = Join-Path -Path $outputDir -ChildPath "ChangeLog.txt"

$releaseNotesFile = Join-Path -Path $outputDir -ChildPath "ReleaseNotes.txt"

if (-not (Test-Path $outputDir)) { New-Item $outputDir -Type directory -Force }

if (Test-Path $changeLogFile) { Remove-Item $changeLogFile -Force }

if (Test-Path $releaseNotesFile) { Remove-Item $releaseNotesFile -Force }

#perform right files order

$items = Get-ChildItem -Path $inputDir -Filter *.txt |

Select-Object -Property @{Name = "FileName"; Expression = {$_.BaseName}},

@{Name = "File"; Expression = {$_}},

@{Name = "ReleaseVersion"; Expression= {($_.BaseName -split "_", 2)[0] -as [Version]}},

@{Name ="ReleaseName"; Expression= {($_.BaseName -split "_", 2)[1] }},

@{Name ="FixedReleaseName"; Expression = {($_.BaseName -split "_", 2)[1] -replace "Z_Final", "Final"}} |

Sort-Object -Property @{Expression="ReleaseVersion";Descending=$true}, @{Expression="ReleaseName";Descending=$true}

#compose ChangeLog and ReleaseInfo files

Foreach ($complexObject in $items) {

$isInitial = $complexObject.FileName -eq "0.0.0"

if($isInitial){

Add-Content $changeLogFile ( Get-Content $complexObject.File.FullName)

Add-Content $changeLogFile ""

}

else{

#on first itteration create ReleaseNotes

if (-not(Test-Path $releaseNotesFile)) { Add-Content $releaseNotesFile (Get-Content $complexObject.File.FullName) }

Add-Content $changeLogFile ("Changes in {0} {1}" -f $complexObject.ReleaseVersion, $complexObject.FixedReleaseName)

Add-Content $changeLogFile ""

Add-Content $changeLogFile ( Get-Content $complexObject.File.FullName)

Add-Content $changeLogFile ""

}

}