Microsoft.PowerShell.Archive.psm1
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data LocalizedData { # culture="en-US" ConvertFrom-StringData @' PathNotFoundError=The path '{0}' either does not exist or is not a valid file system path. ExpandArchiveInValidDestinationPath=The path '{0}' is not a valid file system directory path. InvalidZipFileExtensionError={0} is not a supported archive file format. {1} is the only supported archive file format. ArchiveFileIsReadOnly=The attributes of the archive file {0} is set to 'ReadOnly' hence it cannot be updated. If you intend to update the existing archive file, remove the 'ReadOnly' attribute on the archive file else use -Force parameter to override and create a new archive file. ZipFileExistError=The archive file {0} already exists. Use the -Update parameter to update the existing archive file or use the -Force parameter to overwrite the existing archive file. DuplicatePathFoundError=The input to {0} parameter contains a duplicate path '{1}'. Provide a unique set of paths as input to {2} parameter. ArchiveFileIsEmpty=The archive file {0} is empty. CompressProgressBarText=The archive file '{0}' creation is in progress... ExpandProgressBarText=The archive file '{0}' expansion is in progress... AppendArchiveFileExtensionMessage=The archive file path '{0}' supplied to the DestinationPath parameter does not include .zip extension. Hence .zip is appended to the supplied DestinationPath path and the archive file would be created at '{1}'. AddItemtoArchiveFile=Adding '{0}'. BadArchiveEntry=Can not process invalid archive entry '{0}'. CreateFileAtExpandedPath=Created '{0}'. InvalidArchiveFilePathError=The archive file path '{0}' specified as input to the {1} parameter is resolving to multiple file system paths. Provide a unique path to the {2} parameter where the archive file has to be created. InvalidExpandedDirPathError=The directory path '{0}' specified as input to the DestinationPath parameter is resolving to multiple file system paths. Provide a unique path to the Destination parameter where the archive file contents have to be expanded. FileExistsError=Failed to create file '{0}' while expanding the archive file '{1}' contents as the file '{2}' already exists. Use the -Force parameter if you want to overwrite the existing directory '{3}' contents when expanding the archive file. DeleteArchiveFile=The partially created archive file '{0}' is deleted as it is not usable. InvalidDestinationPath=The destination path '{0}' does not contain a valid archive file name. PreparingToCompressVerboseMessage=Preparing to compress... PreparingToExpandVerboseMessage=Preparing to expand... ItemDoesNotAppearToBeAValidZipArchive=File '{0}' does not appear to be a valid zip archive. '@ } Import-LocalizedData LocalizedData -filename ArchiveResources -ErrorAction Ignore $zipFileExtension = ".zip" <############################################################################################ # The Compress-Archive cmdlet can be used to zip/compress one or more files/directories. ############################################################################################> function Compress-Archive { [CmdletBinding( DefaultParameterSetName="Path", SupportsShouldProcess=$true, HelpUri="https://go.microsoft.com/fwlink/?LinkID=393252")] [OutputType([System.IO.File])] param ( [parameter (mandatory=$true, Position=0, ParameterSetName="Path", ValueFromPipeline=$true, ValueFromPipelineByPropertyName=$true)] [parameter (mandatory=$true, Position=0, ParameterSetName="PathWithForce", ValueFromPipeline=$true, ValueFromPipelineByPropertyName=$true)] [parameter (mandatory=$true, Position=0, ParameterSetName="PathWithUpdate", ValueFromPipeline=$true, ValueFromPipelineByPropertyName=$true)] [ValidateNotNullOrEmpty()] [string[]] $Path, [parameter (mandatory=$true, ParameterSetName="LiteralPath", ValueFromPipeline=$false, ValueFromPipelineByPropertyName=$true)] [parameter (mandatory=$true, ParameterSetName="LiteralPathWithForce", ValueFromPipeline=$false, ValueFromPipelineByPropertyName=$true)] [parameter (mandatory=$true, ParameterSetName="LiteralPathWithUpdate", ValueFromPipeline=$false, ValueFromPipelineByPropertyName=$true)] [ValidateNotNullOrEmpty()] [Alias("PSPath")] [string[]] $LiteralPath, [parameter (mandatory=$true, Position=1, ValueFromPipeline=$false, ValueFromPipelineByPropertyName=$false)] [ValidateNotNullOrEmpty()] [string] $DestinationPath, [parameter ( mandatory=$false, ValueFromPipeline=$false, ValueFromPipelineByPropertyName=$false)] [ValidateSet("Optimal","NoCompression","Fastest")] [string] $CompressionLevel = "Optimal", [parameter(mandatory=$true, ParameterSetName="PathWithUpdate", ValueFromPipeline=$false, ValueFromPipelineByPropertyName=$false)] [parameter(mandatory=$true, ParameterSetName="LiteralPathWithUpdate", ValueFromPipeline=$false, ValueFromPipelineByPropertyName=$false)] [switch] $Update = $false, [parameter(mandatory=$true, ParameterSetName="PathWithForce", ValueFromPipeline=$false, ValueFromPipelineByPropertyName=$false)] [parameter(mandatory=$true, ParameterSetName="LiteralPathWithForce", ValueFromPipeline=$false, ValueFromPipelineByPropertyName=$false)] [switch] $Force = $false, [switch] $PassThru = $false ) BEGIN { # Ensure the destination path is in a non-PS-specific format $DestinationPath = $PSCmdlet.GetUnresolvedProviderPathFromPSPath($DestinationPath) $inputPaths = @() $destinationParentDir = [system.IO.Path]::GetDirectoryName($DestinationPath) if($null -eq $destinationParentDir) { $errorMessage = ($LocalizedData.InvalidDestinationPath -f $DestinationPath) ThrowTerminatingErrorHelper "InvalidArchiveFilePath" $errorMessage ([System.Management.Automation.ErrorCategory]::InvalidArgument) $DestinationPath } if($destinationParentDir -eq [string]::Empty) { $destinationParentDir = '.' } $archiveFileName = [system.IO.Path]::GetFileName($DestinationPath) $destinationParentDir = GetResolvedPathHelper $destinationParentDir $false $PSCmdlet if($destinationParentDir.Count -gt 1) { $errorMessage = ($LocalizedData.InvalidArchiveFilePathError -f $DestinationPath, "DestinationPath", "DestinationPath") ThrowTerminatingErrorHelper "InvalidArchiveFilePath" $errorMessage ([System.Management.Automation.ErrorCategory]::InvalidArgument) $DestinationPath } IsValidFileSystemPath $destinationParentDir | Out-Null $DestinationPath = Join-Path -Path $destinationParentDir -ChildPath $archiveFileName # GetExtension API does not validate for the actual existence of the path. $extension = [system.IO.Path]::GetExtension($DestinationPath) # If user does not specify an extension, we append the .zip extension automatically. If($extension -eq [string]::Empty) { $DestinationPathWithOutExtension = $DestinationPath $DestinationPath = $DestinationPathWithOutExtension + $zipFileExtension $appendArchiveFileExtensionMessage = ($LocalizedData.AppendArchiveFileExtensionMessage -f $DestinationPathWithOutExtension, $DestinationPath) Write-Verbose $appendArchiveFileExtensionMessage } $archiveFileExist = Test-Path -LiteralPath $DestinationPath -PathType Leaf if($archiveFileExist -and ($Update -eq $false -and $Force -eq $false)) { $errorMessage = ($LocalizedData.ZipFileExistError -f $DestinationPath) ThrowTerminatingErrorHelper "ArchiveFileExists" $errorMessage ([System.Management.Automation.ErrorCategory]::InvalidArgument) $DestinationPath } # If archive file already exists and if -Update is specified, then we check to see # if we have write access permission to update the existing archive file. if($archiveFileExist -and $Update -eq $true) { $item = Get-Item -Path $DestinationPath if($item.Attributes.ToString().Contains("ReadOnly")) { $errorMessage = ($LocalizedData.ArchiveFileIsReadOnly -f $DestinationPath) ThrowTerminatingErrorHelper "ArchiveFileIsReadOnly" $errorMessage ([System.Management.Automation.ErrorCategory]::InvalidOperation) $DestinationPath } } $isWhatIf = $psboundparameters.ContainsKey("WhatIf") if(!$isWhatIf) { $preparingToCompressVerboseMessage = ($LocalizedData.PreparingToCompressVerboseMessage) Write-Verbose $preparingToCompressVerboseMessage $progressBarStatus = ($LocalizedData.CompressProgressBarText -f $DestinationPath) ProgressBarHelper "Compress-Archive" $progressBarStatus 0 100 100 1 } } PROCESS { if($PsCmdlet.ParameterSetName -eq "Path" -or $PsCmdlet.ParameterSetName -eq "PathWithForce" -or $PsCmdlet.ParameterSetName -eq "PathWithUpdate") { $inputPaths += $Path } if($PsCmdlet.ParameterSetName -eq "LiteralPath" -or $PsCmdlet.ParameterSetName -eq "LiteralPathWithForce" -or $PsCmdlet.ParameterSetName -eq "LiteralPathWithUpdate") { $inputPaths += $LiteralPath } } END { # If archive file already exists and if -Force is specified, we delete the # existing archive file and create a brand new one. if(($PsCmdlet.ParameterSetName -eq "PathWithForce" -or $PsCmdlet.ParameterSetName -eq "LiteralPathWithForce") -and $archiveFileExist) { Remove-Item -Path $DestinationPath -Force -ErrorAction Stop } # Validate Source Path depending on parameter set being used. # The specified source path contains one or more files or directories that needs # to be compressed. $isLiteralPathUsed = $false if($PsCmdlet.ParameterSetName -eq "LiteralPath" -or $PsCmdlet.ParameterSetName -eq "LiteralPathWithForce" -or $PsCmdlet.ParameterSetName -eq "LiteralPathWithUpdate") { $isLiteralPathUsed = $true } ValidateDuplicateFileSystemPath $PsCmdlet.ParameterSetName $inputPaths $resolvedPaths = GetResolvedPathHelper $inputPaths $isLiteralPathUsed $PSCmdlet IsValidFileSystemPath $resolvedPaths | Out-Null $sourcePath = $resolvedPaths; # CSVHelper: This is a helper function used to append comma after each path specified by # the $sourcePath array. The comma separated paths are displayed in the -WhatIf message. $sourcePathInCsvFormat = CSVHelper $sourcePath if($pscmdlet.ShouldProcess($sourcePathInCsvFormat)) { try { # StopProcessing is not available in Script cmdlets. However the pipeline execution # is terminated when ever 'CTRL + C' is entered by user to terminate the cmdlet execution. # The finally block is executed whenever pipeline is terminated. # $isArchiveFileProcessingComplete variable is used to track if 'CTRL + C' is entered by the # user. $isArchiveFileProcessingComplete = $false $numberOfItemsArchived = CompressArchiveHelper $sourcePath $DestinationPath $CompressionLevel $Update $isArchiveFileProcessingComplete = $true } finally { # The $isArchiveFileProcessingComplete would be set to $false if user has typed 'CTRL + C' to # terminate the cmdlet execution or if an unhandled exception is thrown. # $numberOfItemsArchived contains the count of number of files or directories add to the archive file. # If the newly created archive file is empty then we delete it as it's not usable. if(($isArchiveFileProcessingComplete -eq $false) -or ($numberOfItemsArchived -eq 0)) { $DeleteArchiveFileMessage = ($LocalizedData.DeleteArchiveFile -f $DestinationPath) Write-Verbose $DeleteArchiveFileMessage # delete the partial archive file created. if (Test-Path $DestinationPath) { Remove-Item -LiteralPath $DestinationPath -Force -Recurse -ErrorAction SilentlyContinue } } elseif ($PassThru) { Get-Item -LiteralPath $DestinationPath } } } } } <############################################################################################ # The Expand-Archive cmdlet can be used to expand/extract an zip file. ############################################################################################> function Expand-Archive { [CmdletBinding( DefaultParameterSetName="Path", SupportsShouldProcess=$true, HelpUri="https://go.microsoft.com/fwlink/?LinkID=393253")] [OutputType([System.IO.FileSystemInfo])] param ( [parameter ( mandatory=$true, Position=0, ParameterSetName="Path", ValueFromPipeline=$true, ValueFromPipelineByPropertyName=$true)] [ValidateNotNullOrEmpty()] [string] $Path, [parameter ( mandatory=$true, ParameterSetName="LiteralPath", ValueFromPipelineByPropertyName=$true)] [ValidateNotNullOrEmpty()] [Alias("PSPath")] [string] $LiteralPath, [parameter (mandatory=$false, Position=1, ValueFromPipeline=$false, ValueFromPipelineByPropertyName=$false)] [ValidateNotNullOrEmpty()] [string] $DestinationPath, [parameter (mandatory=$false, ValueFromPipeline=$false, ValueFromPipelineByPropertyName=$false)] [switch] $Force, [switch] $PassThru = $false ) BEGIN { $isVerbose = $psboundparameters.ContainsKey("Verbose") $isConfirm = $psboundparameters.ContainsKey("Confirm") $isDestinationPathProvided = $true if($DestinationPath -eq [string]::Empty) { $resolvedDestinationPath = (Get-Location).ProviderPath $isDestinationPathProvided = $false } else { $destinationPathExists = Test-Path -Path $DestinationPath -PathType Container if($destinationPathExists) { $resolvedDestinationPath = GetResolvedPathHelper $DestinationPath $false $PSCmdlet if($resolvedDestinationPath.Count -gt 1) { $errorMessage = ($LocalizedData.InvalidExpandedDirPathError -f $DestinationPath) ThrowTerminatingErrorHelper "InvalidDestinationPath" $errorMessage ([System.Management.Automation.ErrorCategory]::InvalidArgument) $DestinationPath } # At this point we are sure that the provided path resolves to a valid single path. # Calling Resolve-Path again to get the underlying provider name. $suppliedDestinationPath = Resolve-Path -Path $DestinationPath if($suppliedDestinationPath.Provider.Name-ne "FileSystem") { $errorMessage = ($LocalizedData.ExpandArchiveInValidDestinationPath -f $DestinationPath) ThrowTerminatingErrorHelper "InvalidDirectoryPath" $errorMessage ([System.Management.Automation.ErrorCategory]::InvalidArgument) $DestinationPath } } else { $createdItem = New-Item -Path $DestinationPath -ItemType Directory -Confirm:$isConfirm -Verbose:$isVerbose -ErrorAction Stop if($createdItem -ne $null -and $createdItem.PSProvider.Name -ne "FileSystem") { Remove-Item "$DestinationPath" -Force -Recurse -ErrorAction SilentlyContinue $errorMessage = ($LocalizedData.ExpandArchiveInValidDestinationPath -f $DestinationPath) ThrowTerminatingErrorHelper "InvalidDirectoryPath" $errorMessage ([System.Management.Automation.ErrorCategory]::InvalidArgument) $DestinationPath } $resolvedDestinationPath = GetResolvedPathHelper $DestinationPath $true $PSCmdlet } } $isWhatIf = $psboundparameters.ContainsKey("WhatIf") if(!$isWhatIf) { $preparingToExpandVerboseMessage = ($LocalizedData.PreparingToExpandVerboseMessage) Write-Verbose $preparingToExpandVerboseMessage $progressBarStatus = ($LocalizedData.ExpandProgressBarText -f $DestinationPath) ProgressBarHelper "Expand-Archive" $progressBarStatus 0 100 100 1 } } PROCESS { switch($PsCmdlet.ParameterSetName) { "Path" { $resolvedSourcePaths = GetResolvedPathHelper $Path $false $PSCmdlet if($resolvedSourcePaths.Count -gt 1) { $errorMessage = ($LocalizedData.InvalidArchiveFilePathError -f $Path, $PsCmdlet.ParameterSetName, $PsCmdlet.ParameterSetName) ThrowTerminatingErrorHelper "InvalidArchiveFilePath" $errorMessage ([System.Management.Automation.ErrorCategory]::InvalidArgument) $Path } } "LiteralPath" { $resolvedSourcePaths = GetResolvedPathHelper $LiteralPath $true $PSCmdlet if($resolvedSourcePaths.Count -gt 1) { $errorMessage = ($LocalizedData.InvalidArchiveFilePathError -f $LiteralPath, $PsCmdlet.ParameterSetName, $PsCmdlet.ParameterSetName) ThrowTerminatingErrorHelper "InvalidArchiveFilePath" $errorMessage ([System.Management.Automation.ErrorCategory]::InvalidArgument) $LiteralPath } } } ValidateArchivePathHelper $resolvedSourcePaths if($pscmdlet.ShouldProcess($resolvedSourcePaths)) { $expandedItems = @() try { # StopProcessing is not available in Script cmdlets. However the pipeline execution # is terminated when ever 'CTRL + C' is entered by user to terminate the cmdlet execution. # The finally block is executed whenever pipeline is terminated. # $isArchiveFileProcessingComplete variable is used to track if 'CTRL + C' is entered by the # user. $isArchiveFileProcessingComplete = $false # The User has not provided a destination path, hence we use '$pwd\ArchiveFileName' as the directory where the # archive file contents would be expanded. If the path '$pwd\ArchiveFileName' already exists then we use the # Windows default mechanism of appending a counter value at the end of the directory name where the contents # would be expanded. if(!$isDestinationPathProvided) { $archiveFile = New-Object System.IO.FileInfo $resolvedSourcePaths $resolvedDestinationPath = Join-Path -Path $resolvedDestinationPath -ChildPath $archiveFile.BaseName $destinationPathExists = Test-Path -LiteralPath $resolvedDestinationPath -PathType Container if(!$destinationPathExists) { New-Item -Path $resolvedDestinationPath -ItemType Directory -Confirm:$isConfirm -Verbose:$isVerbose -ErrorAction Stop | Out-Null } } ExpandArchiveHelper $resolvedSourcePaths $resolvedDestinationPath ([ref]$expandedItems) $Force $isVerbose $isConfirm $isArchiveFileProcessingComplete = $true } finally { # The $isArchiveFileProcessingComplete would be set to $false if user has typed 'CTRL + C' to # terminate the cmdlet execution or if an unhandled exception is thrown. if($isArchiveFileProcessingComplete -eq $false) { if($expandedItems.Count -gt 0) { # delete the expanded file/directory as the archive # file was not completely expanded. $expandedItems | % { Remove-Item "$_" -Force -Recurse } } } elseif ($PassThru -and $expandedItems.Count -gt 0) { # Return the expanded items, being careful to remove trailing directory separators from # any folder paths for consistency $trailingDirSeparators = '\' + [System.IO.Path]::DirectorySeparatorChar + '+$' Get-Item -LiteralPath ($expandedItems -replace $trailingDirSeparators) } } } } } <############################################################################################ # GetResolvedPathHelper: This is a helper function used to resolve the user specified Path. # The path can either be absolute or relative path. ############################################################################################> function GetResolvedPathHelper { param ( [string[]] $path, [boolean] $isLiteralPath, [System.Management.Automation.PSCmdlet] $callerPSCmdlet ) $resolvedPaths =@() # null and empty check are are already done on Path parameter at the cmdlet layer. foreach($currentPath in $path) { try { if($isLiteralPath) { $currentResolvedPaths = Resolve-Path -LiteralPath $currentPath -ErrorAction Stop } else { $currentResolvedPaths = Resolve-Path -Path $currentPath -ErrorAction Stop } } catch { $errorMessage = ($LocalizedData.PathNotFoundError -f $currentPath) $exception = New-Object System.InvalidOperationException $errorMessage, $_.Exception $errorRecord = CreateErrorRecordHelper "ArchiveCmdletPathNotFound" $null ([System.Management.Automation.ErrorCategory]::InvalidArgument) $exception $currentPath $callerPSCmdlet.ThrowTerminatingError($errorRecord) } foreach($currentResolvedPath in $currentResolvedPaths) { $resolvedPaths += $currentResolvedPath.ProviderPath } } $resolvedPaths } function Add-CompressionAssemblies { Add-Type -AssemblyName System.IO.Compression if ($psedition -eq "Core") { Add-Type -AssemblyName System.IO.Compression.ZipFile } else { Add-Type -AssemblyName System.IO.Compression.FileSystem } } function IsValidFileSystemPath { param ( [string[]] $path ) $result = $true; # null and empty check are are already done on Path parameter at the cmdlet layer. foreach($currentPath in $path) { if(!([System.IO.File]::Exists($currentPath) -or [System.IO.Directory]::Exists($currentPath))) { $errorMessage = ($LocalizedData.PathNotFoundError -f $currentPath) ThrowTerminatingErrorHelper "PathNotFound" $errorMessage ([System.Management.Automation.ErrorCategory]::InvalidArgument) $currentPath } } return $result; } function ValidateDuplicateFileSystemPath { param ( [string] $inputParameter, [string[]] $path ) $uniqueInputPaths = @() # null and empty check are are already done on Path parameter at the cmdlet layer. foreach($currentPath in $path) { $currentInputPath = $currentPath.ToUpper() if($uniqueInputPaths.Contains($currentInputPath)) { $errorMessage = ($LocalizedData.DuplicatePathFoundError -f $inputParameter, $currentPath, $inputParameter) ThrowTerminatingErrorHelper "DuplicatePathFound" $errorMessage ([System.Management.Automation.ErrorCategory]::InvalidArgument) $currentPath } else { $uniqueInputPaths += $currentInputPath } } } function CompressionLevelMapper { param ( [string] $compressionLevel ) $compressionLevelFormat = [System.IO.Compression.CompressionLevel]::Optimal # CompressionLevel format is already validated at the cmdlet layer. switch($compressionLevel.ToString()) { "Fastest" { $compressionLevelFormat = [System.IO.Compression.CompressionLevel]::Fastest } "NoCompression" { $compressionLevelFormat = [System.IO.Compression.CompressionLevel]::NoCompression } } return $compressionLevelFormat } function CompressArchiveHelper { param ( [string[]] $sourcePath, [string] $destinationPath, [string] $compressionLevel, [bool] $isUpdateMode ) $numberOfItemsArchived = 0 $sourceFilePaths = @() $sourceDirPaths = @() foreach($currentPath in $sourcePath) { $result = Test-Path -LiteralPath $currentPath -Type Leaf if($result -eq $true) { $sourceFilePaths += $currentPath } else { $sourceDirPaths += $currentPath } } # The Source Path contains one or more directory (this directory can have files under it) and no files to be compressed. if($sourceFilePaths.Count -eq 0 -and $sourceDirPaths.Count -gt 0) { $currentSegmentWeight = 100/[double]$sourceDirPaths.Count $previousSegmentWeight = 0 foreach($currentSourceDirPath in $sourceDirPaths) { $count = CompressSingleDirHelper $currentSourceDirPath $destinationPath $compressionLevel $true $isUpdateMode $previousSegmentWeight $currentSegmentWeight $numberOfItemsArchived += $count $previousSegmentWeight += $currentSegmentWeight } } # The Source Path contains only files to be compressed. elseIf($sourceFilePaths.Count -gt 0 -and $sourceDirPaths.Count -eq 0) { # $previousSegmentWeight is equal to 0 as there are no prior segments. # $currentSegmentWeight is set to 100 as all files have equal weightage. $previousSegmentWeight = 0 $currentSegmentWeight = 100 $numberOfItemsArchived = CompressFilesHelper $sourceFilePaths $destinationPath $compressionLevel $isUpdateMode $previousSegmentWeight $currentSegmentWeight } # The Source Path contains one or more files and one or more directories (this directory can have files under it) to be compressed. elseif($sourceFilePaths.Count -gt 0 -and $sourceDirPaths.Count -gt 0) { # each directory is considered as an individual segments & all the individual files are clubed in to a separate segment. $currentSegmentWeight = 100/[double]($sourceDirPaths.Count +1) $previousSegmentWeight = 0 foreach($currentSourceDirPath in $sourceDirPaths) { $count = CompressSingleDirHelper $currentSourceDirPath $destinationPath $compressionLevel $true $isUpdateMode $previousSegmentWeight $currentSegmentWeight $numberOfItemsArchived += $count $previousSegmentWeight += $currentSegmentWeight } $count = CompressFilesHelper $sourceFilePaths $destinationPath $compressionLevel $isUpdateMode $previousSegmentWeight $currentSegmentWeight $numberOfItemsArchived += $count } return $numberOfItemsArchived } function CompressFilesHelper { param ( [string[]] $sourceFilePaths, [string] $destinationPath, [string] $compressionLevel, [bool] $isUpdateMode, [double] $previousSegmentWeight, [double] $currentSegmentWeight ) $numberOfItemsArchived = ZipArchiveHelper $sourceFilePaths $destinationPath $compressionLevel $isUpdateMode $null $previousSegmentWeight $currentSegmentWeight return $numberOfItemsArchived } function CompressSingleDirHelper { param ( [string] $sourceDirPath, [string] $destinationPath, [string] $compressionLevel, [bool] $useParentDirAsRoot, [bool] $isUpdateMode, [double] $previousSegmentWeight, [double] $currentSegmentWeight ) [System.Collections.Generic.List[System.String]]$subDirFiles = @() if($useParentDirAsRoot) { $sourceDirInfo = New-Object -TypeName System.IO.DirectoryInfo -ArgumentList $sourceDirPath $sourceDirFullName = $sourceDirInfo.Parent.FullName # If the directory is present at the drive level the DirectoryInfo.Parent include directory separator. example: C:\ # On the other hand if the directory exists at a deper level then DirectoryInfo.Parent # has just the path (without an ending directory separator). example C:\source if($sourceDirFullName.Length -eq 3) { $modifiedSourceDirFullName = $sourceDirFullName } else { $modifiedSourceDirFullName = $sourceDirFullName + [System.IO.Path]::DirectorySeparatorChar } } else { $sourceDirFullName = $sourceDirPath $modifiedSourceDirFullName = $sourceDirFullName + [System.IO.Path]::DirectorySeparatorChar } $dirContents = Get-ChildItem -LiteralPath $sourceDirPath -Recurse foreach($currentContent in $dirContents) { $isContainer = $currentContent -is [System.IO.DirectoryInfo] if(!$isContainer) { $subDirFiles.Add($currentContent.FullName) } else { # The currentContent points to a directory. # We need to check if the directory is an empty directory, if so such a # directory has to be explicitly added to the archive file. # if there are no files in the directory the GetFiles() API returns an empty array. $files = $currentContent.GetFiles() if($files.Count -eq 0) { $subDirFiles.Add($currentContent.FullName + [System.IO.Path]::DirectorySeparatorChar) } } } $numberOfItemsArchived = ZipArchiveHelper $subDirFiles.ToArray() $destinationPath $compressionLevel $isUpdateMode $modifiedSourceDirFullName $previousSegmentWeight $currentSegmentWeight return $numberOfItemsArchived } function ZipArchiveHelper { param ( [System.Collections.Generic.List[System.String]] $sourcePaths, [string] $destinationPath, [string] $compressionLevel, [bool] $isUpdateMode, [string] $modifiedSourceDirFullName, [double] $previousSegmentWeight, [double] $currentSegmentWeight ) $numberOfItemsArchived = 0 $fileMode = [System.IO.FileMode]::Create $result = Test-Path -LiteralPath $DestinationPath -Type Leaf if($result -eq $true) { $fileMode = [System.IO.FileMode]::Open } Add-CompressionAssemblies try { # At this point we are sure that the archive file has write access. $archiveFileStreamArgs = @($destinationPath, $fileMode) $archiveFileStream = New-Object -TypeName System.IO.FileStream -ArgumentList $archiveFileStreamArgs $zipArchiveArgs = @($archiveFileStream, [System.IO.Compression.ZipArchiveMode]::Update, $false) $zipArchive = New-Object -TypeName System.IO.Compression.ZipArchive -ArgumentList $zipArchiveArgs $currentEntryCount = 0 $progressBarStatus = ($LocalizedData.CompressProgressBarText -f $destinationPath) $bufferSize = 4kb $buffer = New-Object Byte[] $bufferSize foreach($currentFilePath in $sourcePaths) { if($modifiedSourceDirFullName -ne $null -and $modifiedSourceDirFullName.Length -gt 0) { $index = $currentFilePath.IndexOf($modifiedSourceDirFullName, [System.StringComparison]::OrdinalIgnoreCase) $currentFilePathSubString = $currentFilePath.Substring($index, $modifiedSourceDirFullName.Length) $relativeFilePath = $currentFilePath.Replace($currentFilePathSubString, "").Trim() } else { $relativeFilePath = [System.IO.Path]::GetFileName($currentFilePath) } # Update mode is selected. # Check to see if archive file already contains one or more zip files in it. if($isUpdateMode -eq $true -and $zipArchive.Entries.Count -gt 0) { $entryToBeUpdated = $null # Check if the file already exists in the archive file. # If so replace it with new file from the input source. # If the file does not exist in the archive file then default to # create mode and create the entry in the archive file. foreach($currentArchiveEntry in $zipArchive.Entries) { if($currentArchiveEntry.FullName -eq $relativeFilePath) { $entryToBeUpdated = $currentArchiveEntry break } } if($entryToBeUpdated -ne $null) { $addItemtoArchiveFileMessage = ($LocalizedData.AddItemtoArchiveFile -f $currentFilePath) $entryToBeUpdated.Delete() } } $compression = CompressionLevelMapper $compressionLevel # If a directory needs to be added to an archive file, # by convention the .Net API's expect the path of the directory # to end with directory separator to detect the path as an directory. if(!$relativeFilePath.EndsWith([System.IO.Path]::DirectorySeparatorChar, [StringComparison]::OrdinalIgnoreCase)) { try { try { $currentFileStream = [System.IO.File]::Open($currentFilePath, [System.IO.FileMode]::Open, [System.IO.FileAccess]::Read) } catch { # Failed to access the file. Write a non terminating error to the pipeline # and move on with the remaining files. $exception = $_.Exception if($null -ne $_.Exception -and $null -ne $_.Exception.InnerException) { $exception = $_.Exception.InnerException } $errorRecord = CreateErrorRecordHelper "CompressArchiveUnauthorizedAccessError" $null ([System.Management.Automation.ErrorCategory]::PermissionDenied) $exception $currentFilePath Write-Error -ErrorRecord $errorRecord } if($null -ne $currentFileStream) { $srcStream = New-Object System.IO.BinaryReader $currentFileStream $currentArchiveEntry = $zipArchive.CreateEntry($relativeFilePath, $compression) # Updating the File Creation time so that the same timestamp would be retained after expanding the compressed file. # At this point we are sure that Get-ChildItem would succeed. $lastWriteTime = (Get-Item -LiteralPath $currentFilePath).LastWriteTime if ($lastWriteTime.Year -lt 1980) { Write-Warning "'$currentFilePath' has LastWriteTime earlier than 1980. Compress-Archive will store any files with LastWriteTime values earlier than 1980 as 1/1/1980 00:00." $lastWriteTime = [DateTime]::Parse('1980-01-01T00:00:00') } $currentArchiveEntry.LastWriteTime = $lastWriteTime $destStream = New-Object System.IO.BinaryWriter $currentArchiveEntry.Open() while($numberOfBytesRead = $srcStream.Read($buffer, 0, $bufferSize)) { $destStream.Write($buffer, 0, $numberOfBytesRead) $destStream.Flush() } $numberOfItemsArchived += 1 $addItemtoArchiveFileMessage = ($LocalizedData.AddItemtoArchiveFile -f $currentFilePath) } } finally { If($null -ne $currentFileStream) { $currentFileStream.Dispose() } If($null -ne $srcStream) { $srcStream.Dispose() } If($null -ne $destStream) { $destStream.Dispose() } } } else { $currentArchiveEntry = $zipArchive.CreateEntry("$relativeFilePath", $compression) $numberOfItemsArchived += 1 $addItemtoArchiveFileMessage = ($LocalizedData.AddItemtoArchiveFile -f $currentFilePath) } if($null -ne $addItemtoArchiveFileMessage) { Write-Verbose $addItemtoArchiveFileMessage } $currentEntryCount += 1 ProgressBarHelper "Compress-Archive" $progressBarStatus $previousSegmentWeight $currentSegmentWeight $sourcePaths.Count $currentEntryCount } } finally { If($null -ne $zipArchive) { $zipArchive.Dispose() } If($null -ne $archiveFileStream) { $archiveFileStream.Dispose() } # Complete writing progress. Write-Progress -Activity "Compress-Archive" -Completed } return $numberOfItemsArchived } <############################################################################################ # ValidateArchivePathHelper: This is a helper function used to validate the archive file # path & its file format. The only supported archive file format is .zip ############################################################################################> function ValidateArchivePathHelper { param ( [string] $archiveFile ) if(-not [System.IO.File]::Exists($archiveFile)) { $errorMessage = ($LocalizedData.PathNotFoundError -f $archiveFile) ThrowTerminatingErrorHelper "PathNotFound" $errorMessage ([System.Management.Automation.ErrorCategory]::InvalidArgument) $archiveFile } } <############################################################################################ # ExpandArchiveHelper: This is a helper function used to expand the archive file contents # to the specified directory. ############################################################################################> function ExpandArchiveHelper { param ( [string] $archiveFile, [string] $expandedDir, [ref] $expandedItems, [boolean] $force, [boolean] $isVerbose, [boolean] $isConfirm ) Add-CompressionAssemblies try { # The existence of archive file has already been validated by ValidateArchivePathHelper # before calling this helper function. $archiveFileStreamArgs = @($archiveFile, [System.IO.FileMode]::Open, [System.IO.FileAccess]::Read) $archiveFileStream = New-Object -TypeName System.IO.FileStream -ArgumentList $archiveFileStreamArgs $zipArchiveArgs = @($archiveFileStream, [System.IO.Compression.ZipArchiveMode]::Read, $false) try { $zipArchive = New-Object -TypeName System.IO.Compression.ZipArchive -ArgumentList $zipArchiveArgs } catch [System.IO.InvalidDataException] { # Failed to open the file for reading as a zip archive. Wrap the exception # and re-throw it indicating it does not appear to be a valid zip file. $exception = $_.Exception if($null -ne $_.Exception -and $null -ne $_.Exception.InnerException) { $exception = $_.Exception.InnerException } # Load the WindowsBase.dll assembly to get access to the System.IO.FileFormatException class [System.Reflection.Assembly]::Load('WindowsBase,Version=4.0.0.0,Culture=neutral,PublicKeyToken=31bf3856ad364e35') $invalidFileFormatException = New-Object -TypeName System.IO.FileFormatException -ArgumentList @( ($LocalizedData.ItemDoesNotAppearToBeAValidZipArchive -f $archiveFile) $exception ) throw $invalidFileFormatException } if($zipArchive.Entries.Count -eq 0) { $archiveFileIsEmpty = ($LocalizedData.ArchiveFileIsEmpty -f $archiveFile) Write-Verbose $archiveFileIsEmpty return } $currentEntryCount = 0 $progressBarStatus = ($LocalizedData.ExpandProgressBarText -f $archiveFile) # Ensures that the last character on the extraction path is the directory separator char. # Without this, a bad zip file could try to traverse outside of the expected extraction path. # At this point $expandedDir is a fully qualified path without any relative segments. if (-not $expandedDir.EndsWith([System.IO.Path]::DirectorySeparatorChar)) { $expandedDir += [System.IO.Path]::DirectorySeparatorChar } # The archive entries can either be empty directories or files. foreach($currentArchiveEntry in $zipArchive.Entries) { $currentArchiveEntryPath = Join-Path -Path $expandedDir -ChildPath $currentArchiveEntry.FullName # Remove possible relative segments from target # This is similar to [System.IO.Path]::GetFullPath($currentArchiveEntryPath) but uses PS current dir instead of process-wide current dir $currentArchiveEntryPath = $PSCmdlet.SessionState.Path.GetUnresolvedProviderPathFromPSPath($currentArchiveEntryPath) # Check that expanded relative paths and absolute paths from the archive are Not going outside of target directory # Ordinal match is safest, case-sensitive volumes can be mounted within volumes that are case-insensitive. if (-not ($currentArchiveEntryPath.StartsWith($expandedDir, [System.StringComparison]::Ordinal))) { $BadArchiveEntryMessage = ($LocalizedData.BadArchiveEntry -f $currentArchiveEntry.FullName) # notify user of bad archive entry Write-Error $BadArchiveEntryMessage # move on to the next entry in the archive continue } $extension = [system.IO.Path]::GetExtension($currentArchiveEntryPath) # The current archive entry is an empty directory # The FullName of the Archive Entry representing a directory would end with a trailing directory separator. if($extension -eq [string]::Empty -and $currentArchiveEntryPath.EndsWith([System.IO.Path]::DirectorySeparatorChar, [StringComparison]::OrdinalIgnoreCase)) { $pathExists = Test-Path -LiteralPath $currentArchiveEntryPath # The current archive entry expects an empty directory. # Check if the existing directory is empty. If it's not empty # then it means that user has added this directory by other means. if($pathExists -eq $false) { New-Item $currentArchiveEntryPath -Type Directory -Confirm:$isConfirm | Out-Null if(Test-Path -LiteralPath $currentArchiveEntryPath -PathType Container) { $addEmptyDirectorytoExpandedPathMessage = ($LocalizedData.AddItemtoArchiveFile -f $currentArchiveEntryPath) Write-Verbose $addEmptyDirectorytoExpandedPathMessage $expandedItems.Value += $currentArchiveEntryPath } } } else { try { $currentArchiveEntryFileInfo = New-Object -TypeName System.IO.FileInfo -ArgumentList $currentArchiveEntryPath $parentDirExists = Test-Path -LiteralPath $currentArchiveEntryFileInfo.DirectoryName -PathType Container # If the Parent directory of the current entry in the archive file does not exist, then create it. if($parentDirExists -eq $false) { # note that if any ancestor of this directory doesn't exist, we don't recursively create each one as New-Item # takes care of this already, so only one DirectoryInfo is returned instead of one for each parent directory # that only contains directories New-Item $currentArchiveEntryFileInfo.DirectoryName -Type Directory -Confirm:$isConfirm | Out-Null if(!(Test-Path -LiteralPath $currentArchiveEntryFileInfo.DirectoryName -PathType Container)) { # The directory referred by $currentArchiveEntryFileInfo.DirectoryName was not successfully created. # This could be because the user has specified -Confirm parameter when Expand-Archive was invoked # and authorization was not provided when confirmation was prompted. In such a scenario, # we skip the current file in the archive and continue with the remaining archive file contents. Continue } $expandedItems.Value += $currentArchiveEntryFileInfo.DirectoryName } $hasNonTerminatingError = $false # Check if the file in to which the current archive entry contents # would be expanded already exists. if($currentArchiveEntryFileInfo.Exists) { if($force) { Remove-Item -LiteralPath $currentArchiveEntryFileInfo.FullName -Force -ErrorVariable ev -Verbose:$isVerbose -Confirm:$isConfirm if($ev -ne $null) { $hasNonTerminatingError = $true } if(Test-Path -LiteralPath $currentArchiveEntryFileInfo.FullName -PathType Leaf) { # The file referred by $currentArchiveEntryFileInfo.FullName was not successfully removed. # This could be because the user has specified -Confirm parameter when Expand-Archive was invoked # and authorization was not provided when confirmation was prompted. In such a scenario, # we skip the current file in the archive and continue with the remaining archive file contents. Continue } } else { # Write non-terminating error to the pipeline. $errorMessage = ($LocalizedData.FileExistsError -f $currentArchiveEntryFileInfo.FullName, $archiveFile, $currentArchiveEntryFileInfo.FullName, $currentArchiveEntryFileInfo.FullName) $errorRecord = CreateErrorRecordHelper "ExpandArchiveFileExists" $errorMessage ([System.Management.Automation.ErrorCategory]::InvalidOperation) $null $currentArchiveEntryFileInfo.FullName Write-Error -ErrorRecord $errorRecord $hasNonTerminatingError = $true } } if(!$hasNonTerminatingError) { # The ExtractToFile() method doesn't handle whitespace correctly, strip whitespace which is consistent with how Explorer handles archives # There is an edge case where an archive contains files whose only difference is whitespace, but this is uncommon and likely not legitimate [string[]] $parts = $currentArchiveEntryPath.Split([System.IO.Path]::DirectorySeparatorChar) | % { $_.Trim() } $currentArchiveEntryPath = [string]::Join([System.IO.Path]::DirectorySeparatorChar, $parts) [System.IO.Compression.ZipFileExtensions]::ExtractToFile($currentArchiveEntry, $currentArchiveEntryPath, $false) # Add the expanded file path to the $expandedItems array, # to keep track of all the expanded files created while expanding the archive file. # If user enters CTRL + C then at that point of time, all these expanded files # would be deleted as part of the clean up process. $expandedItems.Value += $currentArchiveEntryPath $addFiletoExpandedPathMessage = ($LocalizedData.CreateFileAtExpandedPath -f $currentArchiveEntryPath) Write-Verbose $addFiletoExpandedPathMessage } } finally { If($null -ne $destStream) { $destStream.Dispose() } If($null -ne $srcStream) { $srcStream.Dispose() } } } $currentEntryCount += 1 # $currentSegmentWeight is Set to 100 giving equal weightage to each file that is getting expanded. # $previousSegmentWeight is set to 0 as there are no prior segments. $previousSegmentWeight = 0 $currentSegmentWeight = 100 ProgressBarHelper "Expand-Archive" $progressBarStatus $previousSegmentWeight $currentSegmentWeight $zipArchive.Entries.Count $currentEntryCount } } finally { If($null -ne $zipArchive) { $zipArchive.Dispose() } If($null -ne $archiveFileStream) { $archiveFileStream.Dispose() } # Complete writing progress. Write-Progress -Activity "Expand-Archive" -Completed } } <############################################################################################ # ProgressBarHelper: This is a helper function used to display progress message. # This function is used by both Compress-Archive & Expand-Archive to display archive file # creation/expansion progress. ############################################################################################> function ProgressBarHelper { param ( [string] $cmdletName, [string] $status, [double] $previousSegmentWeight, [double] $currentSegmentWeight, [int] $totalNumberofEntries, [int] $currentEntryCount ) if($currentEntryCount -gt 0 -and $totalNumberofEntries -gt 0 -and $previousSegmentWeight -ge 0 -and $currentSegmentWeight -gt 0) { $entryDefaultWeight = $currentSegmentWeight/[double]$totalNumberofEntries $percentComplete = $previousSegmentWeight + ($entryDefaultWeight * $currentEntryCount) Write-Progress -Activity $cmdletName -Status $status -PercentComplete $percentComplete } } <############################################################################################ # CSVHelper: This is a helper function used to append comma after each path specified by # the SourcePath array. This helper function is used to display all the user supplied paths # in the WhatIf message. ############################################################################################> function CSVHelper { param ( [string[]] $sourcePath ) # SourcePath has already been validated by the calling function. if($sourcePath.Count -gt 1) { $sourcePathInCsvFormat = "`n" for($currentIndex=0; $currentIndex -lt $sourcePath.Count; $currentIndex++) { if($currentIndex -eq $sourcePath.Count - 1) { $sourcePathInCsvFormat += $sourcePath[$currentIndex] } else { $sourcePathInCsvFormat += $sourcePath[$currentIndex] + "`n" } } } else { $sourcePathInCsvFormat = $sourcePath } return $sourcePathInCsvFormat } <############################################################################################ # ThrowTerminatingErrorHelper: This is a helper function used to throw terminating error. ############################################################################################> function ThrowTerminatingErrorHelper { param ( [string] $errorId, [string] $errorMessage, [System.Management.Automation.ErrorCategory] $errorCategory, [object] $targetObject, [Exception] $innerException ) if($innerException -eq $null) { $exception = New-object System.IO.IOException $errorMessage } else { $exception = New-Object System.IO.IOException $errorMessage, $innerException } $exception = New-Object System.IO.IOException $errorMessage $errorRecord = New-Object System.Management.Automation.ErrorRecord $exception, $errorId, $errorCategory, $targetObject $PSCmdlet.ThrowTerminatingError($errorRecord) } <############################################################################################ # 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