packages/jQuery.1.10.2/Tools/common.ps1

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function Get-Checksum($file) {
    $cryptoProvider = New-Object "System.Security.Cryptography.MD5CryptoServiceProvider"
	
    $fileInfo = Get-Item $file
	trap { ;
	continue } $stream = $fileInfo.OpenRead()
    if ($? -eq $false) {
		# Couldn't open file for reading
        return $null
	}
    
    $bytes = $cryptoProvider.ComputeHash($stream)
    $checksum = ''
	foreach ($byte in $bytes) {
		$checksum += $byte.ToString('x2')
	}
    
	$stream.Close() | Out-Null
    
    return $checksum
}

function AddOrUpdate-Reference($scriptsFolderProjectItem, $fileNamePattern, $newFileName) {
    try {
        $referencesFileProjectItem = $scriptsFolderProjectItem.ProjectItems.Item("_references.js")
    }
    catch {
        # _references.js file not found
        return
    }

    if ($referencesFileProjectItem -eq $null) {
        # _references.js file not found
        return
    }

    $referencesFilePath = $referencesFileProjectItem.FileNames(1)
    $referencesTempFilePath = Join-Path $env:TEMP "_references.tmp.js"

    if ((Select-String $referencesFilePath -pattern $fileNamePattern).Length -eq 0) {
        # File has no existing matching reference line
        # Add the full reference line to the beginning of the file
        "/// <reference path=""$newFileName"" />" | Add-Content $referencesTempFilePath -Encoding UTF8
         Get-Content $referencesFilePath | Add-Content $referencesTempFilePath
    }
    else {
        # Loop through file and replace old file name with new file name
        Get-Content $referencesFilePath | ForEach-Object { $_ -replace $fileNamePattern, $newFileName } > $referencesTempFilePath
    }

    # Copy over the new _references.js file
    Copy-Item $referencesTempFilePath $referencesFilePath -Force
    Remove-Item $referencesTempFilePath -Force
}

function Remove-Reference($scriptsFolderProjectItem, $fileNamePattern) {
    try {
        $referencesFileProjectItem = $scriptsFolderProjectItem.ProjectItems.Item("_references.js")
    }
    catch {