Functions/Copy-DscResource.ps1
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# Copyright 2012 Aaron Jensen # # 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 Copy-DscResource { <# .SYNOPSIS Copies DSC resources. .DESCRIPTION This function copies a DSC resource or a directory of DSC resources to a DSC pull server share/website. All files under `$Path` are copied. DSC requires all files have a checksum file (e.g. `localhost.mof.checksum`), which this function generates for you (in a temporary location). Only new files, or files whose checksums have changed, are copied. You can force all files to be copied with the `Force` switch. `Copy-DscResource` is new in Carbon 2.0. .EXAMPLE Copy-DscResource -Path 'localhost.mof' -Destination '\\dscserver\DscResources' Demonstrates how to copy a single resource to a resources SMB share. `localhost.mof` will only be copied if its checksum is different than what is in `\\dscserver\DscResources`. .EXAMPLE Copy-DscResource -Path 'C:\Projects\DscResources' -Destination '\\dscserver\DscResources' Demonstrates how to copy a directory of resources. Only files in the directory are copied. Every file in the source must have a `.checksum` file. Only files whose checksums are different between source and destination will be copied. .EXAMPLE Copy-DscResource -Path 'C:\Projects\DscResources' -Destination '\\dscserver\DscResources' -Recurse Demonstrates how to recursively copy files. .EXAMPLE Copy-DscResource -Path 'C:\Projects\DscResources' -Destination '\\dscserver\DscResources' -Force Demonstrates how to copy all files, even if their `.checksum` files are the same. .EXAMPLE Copy-DscResource -Path 'C:\Projects\DscResources' -Destination '\\dscserver\DscResources' -PassThru Demonstrates how to get `System.IO.FileInfo` objects for all resources copied to the destination. If all files are up-to-date, nothing is copied, and no objects are returned. #> [CmdletBinding()] [OutputType([IO.FileInfo])] param( [Parameter(Mandatory=$true)] [string] # The path to the DSC resource to copy. If a directory is given, all files in that directory are copied. Wildcards supported. $Path, [Parameter(Mandatory=$true)] [string] # The directory where the resources should be copied. $Destination, [Switch] # Recursively copy files from the source directory. $Recurse, [Switch] # Returns `IO.FileInfo` objects for each item copied to `Destination`. $PassThru, [Switch] # Copy resources, even if they are the same on the destination server. $Force ) Set-StrictMode -Version 'Latest' Use-CallerPreference -Cmdlet $PSCmdlet -Session $ExecutionContext.SessionState $tempDir = New-TempDirectory -Prefix 'Carbon+Copy-DscResource+' try { foreach( $item in (Get-ChildItem -Path $Path -Exclude '*.checksum') ) { $destinationPath = Join-Path -Path $Destination -ChildPath $item.Name if( $item.PSIsContainer ) { if( $Recurse ) { if( -not (Test-Path -Path $destinationPath -PathType Container) ) { New-Item -Path $destinationPath -ItemType 'Directory' | Out-Null } Copy-DscResource -Path $item.FullName -Destination $destinationPath -Recurse -Force:$Force -PassThru:$PassThru } continue } $sourceChecksumPath = '{0}.checksum' -f $item.Name $sourceChecksumPath = Join-Path -Path $tempDir -ChildPath $sourceChecksumPath $sourceChecksum = Get-FileHash -Path $item.FullName | Select-Object -ExpandProperty 'Hash' # hash files can't have any newline characters, so we can't use Set-Content [IO.File]::WriteAllText($sourceChecksumPath, $sourceChecksum) $destinationChecksum = '' $destinationChecksumPath = '{0}.checksum' -f $destinationPath if( (Test-Path -Path $destinationChecksumPath -PathType Leaf) ) { $destinationChecksum = Get-Content -TotalCount 1 -Path $destinationChecksumPath } if( $Force -or -not (Test-Path -Path $destinationPath -PathType Leaf) -or ($sourceChecksum -ne $destinationChecksum) ) { Copy-Item -Path $item -Destination $Destination -PassThru:$PassThru Copy-Item -Path $sourceChecksumPath -Destination $Destination -PassThru:$PassThru } else { Write-Verbose ('File ''{0}'' already up-to-date.' -f $destinationPath) } } } finally { Remove-Item -Path $tempDir -Recurse -Force -ErrorAction Ignore } } |