zip.ps1
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Set-StrictMode -Version 2 function Expand-Zip { <# .Synopsis Extracts files or directories from a zip folder .Parameter Path The path to the Zip folder to extract .Parameter Destination The location to extract the files to .Parameter ZipDirectory The directory within the zip folder to extract. If not specified, extracts the whole zip file .Parameter ZipFileName The name of a specific file within ZipDirectory to extract .Example Expand-Zip c:\sample.zip c:\files\ Description ----------- This command extracts the entire contents of c:\sample.zip to c:\files\ .Example Expand-Zip c:\sample.zip c:\sample\web\ -ZipDirectory web Description ----------- This command extracts the contents of the web directory of c:\sample.zip to c:\sample\web .Example Expand-Zip c:\sample.zip c:\test\ -ZipDirectory documentation -zipFileName sample.txt Description ----------- This command extracts the sample.txt file from the web directory of c:\sample.zip to c:\sample\sample.txt #> [CmdletBinding()] param( [parameter(Mandatory=$true, Position=0)] [ValidateNotNullOrEmpty()] [ValidateScript({Test-Zip $_ })] [string]$Path, [parameter(Mandatory=$true, Position=1)] [ValidateNotNullOrEmpty()] [string]$Destination, [ValidateScript({!$_ -or (Test-Path $_ -PathType Container -IsValid)})] [string]$ZipDirectory, [ValidateScript({!$_ -or (Test-Path $_ -PathType Leaf -IsValid)})] [string]$ZipFileName ) $prefix = '' if($ZipDirectory){ $prefix = ($ZipDirectory).Replace('\','/').Trim('/') + '/' } if (!(test-path $Destination -PathType Container)) { New-item $Destination -Type Directory | out-null } #Convert path requried to ensure $absoluteDestination = (Resolve-Path $Destination).ProviderPath $zipAbsolutePath = (Resolve-Path $Path).ProviderPath $zipPackage = [IO.Compression.ZipFile]::OpenRead($zipAbsolutePath) try { $entries = $zipPackage.Entries if ($ZipFileName){ $entries = $entries | ? {$_.FullName.Replace('\','/') -eq "${prefix}${ZipFileName}"} | select -First 1 } else { #Filter out directories $entries = $zipPackage.Entries |? Name if ($ZipDirectory) { #Filter out items not under requested directory $entries = $entries |? { $_.FullName.Replace('\','/').StartsWith($prefix, "OrdinalIgnoreCase")} } } $totalFileSize = ($entries |% length | Measure-Object -sum).Sum $processedFileSize = 0 $entries |% { $destination = join-path $absoluteDestination $_.FullName.Substring($prefix.Length) <# Write-Progress 'Extracting Zip' ` -CurrentOperation $_.FullName ` -PercentComplete ($processedFileSize / $totalFileSize * 100) #> $itemDir = split-path $Destination -Parent if (!(Test-Path $itemDir -PathType Container)) { New-item $itemDir -Type Directory | out-null } [IO.Compression.ZipFileExtensions]::ExtractToFile($_, $Destination, $true) $processedFileSize += $_.Length } #Write-Progress 'Extracting-Zip' -Completed } finally { $zipPackage.Dispose() } } function Test-Zip { <# .Synopsis Tests whether a file exists and is a valid zip file. .Parameter Path The path to the file to test .Example Test-Zip c:\sample.zip Description ----------- This command checks if the file c:\sample.zip exists #> [CmdletBinding()] param( [parameter(Mandatory=$true, Position=0, ValueFromPipeline=$true)] [ValidateNotNullOrEmpty()] [string]$Path ) Test-Path $Path -PathType Leaf if((Get-Item $Path).Extension -ne '.zip') { throw "$Path is not a zip file" } } |