Functions/Expand-Item.ps1
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# Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. function Expand-Item { <# .SYNOPSIS Decompresses a ZIP file to a directory using the `DotNetZip` library. .DESCRIPTION The contents of the ZIP file are extracted to a temporary directory, and that directory is returned as a `System.IO.DirectoryInfo` object. You are responsible for deleting that directory when you're finished. You can extract to a specific directory with the `OutDirectory` parameter. If the directory doesn't exist, it is created. If the directory exists, and is empty, the file is decompressed into that directory. If the directory isn't empty, use the `-Force` parameter to overwrite any files/directories which may be present. The directory where the files were decompressed is returned. .LINK https://www.nuget.org/packages/DotNetZip .LINK Compress-Item .LINK Test-ZipFile .EXAMPLE $unzipRoot = Expand-Item -Path 'C:\Carbon.zip' Demonstrates how to unzip a file into a temporary directory. You are responsible for deleting that directory. .EXAMPLE Expand-Item -Path 'C:\Carbon.zip' -OutDirectory 'C:\Modules\Carbon' Demonstrates how to unzip a file into a specific directory. .EXAMPLE Expand-Item -Path 'C:\Carbon.zip' -OutDirectory 'C:\Modules\Carbon' -Force Demonstrates how to decompress to an existing, non-empty directory with the `-Force` parameter. Existing files are overwritten. #> [OutputType([IO.DirectoryInfo])] [CmdletBinding(SupportsShouldProcess=$true)] param( [Parameter(Mandatory=$true)] [string] # The path to the files/directories to compress. $Path, [string] # Path to a directory where the file should be extracted. $OutDirectory, [Switch] # Overwrite any existing files/directories in `OutDirectory`. $Force ) Set-StrictMode -Version 'Latest' Use-CallerPreference -Cmdlet $PSCmdlet -Session $ExecutionContext.SessionState $Path = Resolve-Path -Path $Path | Select-Object -ExpandProperty 'ProviderPath' if( -not $Path ) { return } if( -not (Test-ZipFile -Path $Path) ) { Write-Error ('File ''{0}'' is not a ZIP file.' -f $Path) return } if( $OutDirectory ) { $OutDirectory = Resolve-FullPath -Path $OutDirectory if( (Test-Path -Path $OutDirectory -PathType Container) ) { if( -not $Force -and (Get-ChildItem -LiteralPath $OutDirectory | Measure-Object | Select-Object -ExpandProperty Count) ) { Write-Error ('Output directory ''{0}'' is not empty. Use the `-Force` switch to overwrite existing files/directories.' -f $OutDirectory) return } } } else { $OutDirectory = 'Carbon+Expand-Item+{0}+{1}' -f (Split-Path -Leaf -Path $Path),([IO.Path]::GetRandomFileName()) $OutDirectory = Join-Path -Path $env:TEMP -ChildPath $OutDirectory $null = New-Item -Path $OutDirectory -ItemType 'Directory' } $zipFile = [Ionic.Zip.ZipFile]::Read($Path) try { $zipFile.ExtractAll($OutDirectory, [Ionic.Zip.ExtractExistingFileAction]::OverwriteSilently) } finally { $zipFile.Dispose() } Get-Item -Path $OutDirectory } |