Functions/Test-ZipFile.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 Test-ZipFile { <# .SYNOPSIS Tests if a file is a ZIP file using the `DotNetZip` library. .DESCRIPTION Uses the `Ionic.Zip.ZipFile.IsZipFile` static method to determine if a file is a ZIP file. The file *must* exist. If it doesn't, an error is written and `$null` is returned. You can pipe `System.IO.FileInfo` (or strings) to this function to filter multiple items. .LINK https://www.nuget.org/packages/DotNetZip .LINK Compress-Item .LINK Expand-Item .EXAMPLE Test-ZipFile -Path 'MyCoolZip.zip' Demonstrates how to check the current directory if MyCoolZip.zip is really a ZIP file. #> [OutputType([bool])] [CmdletBinding()] param( [Parameter(Mandatory=$true)] [Alias('FullName')] [string] # The path to the file to test. $Path ) Set-StrictMode -Version 'Latest' Use-CallerPreference -Cmdlet $PSCmdlet -Session $ExecutionContext.SessionState $Path = Resolve-FullPath -Path $Path if( -not (Test-Path -Path $Path -PathType Leaf) ) { Write-Error ('File ''{0}'' not found.' -f $Path) return } return [Ionic.Zip.ZipFile]::IsZipFile( $Path ) } |