"The process cannot access the file" when Unzipping an archive in predeploy.ps1

Legacy Uncategorised
2

I changed the extraction code to extract files one by one and check for the existence of the file before trying to extract. Can’t have a process lock a file that doesn’t can we? Well apparently we can…

$archive = [System.IO.Compression.ZipFile]::OpenRead($zipFile)
	foreach ($file in $archive.Entries) {
		$destinationFileName = [System.IO.Path]::Combine($destination, $file.FullName)
		$destinationFilePath = [System.IO.Path]::GetDirectoryName($destinationFileName)
		[System.IO.Directory]::CreateDirectory($destinationFilePath)
		if (Test-Path $destinationFileName) {
		}
		else {
			[System.IO.Compression.ZipFileExtensions]::ExtractToFile($file, $destinationFileName, $false)
		}
	}

So this resulted in:

Exception calling "ExtractToFile" with "3" argument(s): "The process cannot 
Error    12:20:25
access the file 'D:\Octopus Tentacle\Applications\UAT\Playup.Api\0.0.164-fb-bfe
Error    12:20:25
d40d\website\approot\bin\NewRelicAgent_x64_3.9.146.0.msi' because it is being 
Error    12:20:25
used by another process."
Error    12:20:25
At D:\Octopus 
Error    12:20:25
Tentacle\Applications\UAT\Playup.Api\0.0.164-fb-bfed40d\predeploy.ps1:28 char:4
Error    12:20:25
+             [System.IO.Compression.ZipFileExtensions]::ExtractToFile($file, 
Error    12:20:25
$destinationF ...
Error    12:20:25
+    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Error    12:20:25
~~~~~~~~~~~~
Error    12:20:25
    + CategoryInfo          : NotSpecified: (:) [], ParentContainsErrorRecordE 
Error    12:20:25
   xception
Error    12:20:25
    + FullyQualifiedErrorId : IOException
Fatal    12:20:25
PowerShell script returned a non-zero exit code: 1

All i can say is WTF!?