Powershell copying specific files from source directory, excluding several folders, but then recursive with wildcard for files - powershell

Question

Here is my current script and it works fine. Not efficient running same code twice but I don't know how to combine the wildcards... anyway on to the bigger issue.
The below code searches through my $sourceDir, excludes the files listed in $ExclusionFiles, copies all folders and structure as well as any .jpg or any .csv files, then puts them into the $targetDir.
$sourceDir = 'c:\sectionOne\Graphics\Data'
$targetDir = 'C:\Test\'
$ExclusionFiles = #("InProgress.jpg", "input.csv", "PCMCSV2.csv")
# Get .jpg files
Get-ChildItem $sourceDir -filter "*.jpg" -recurse -Exclude $ExclusionFiles | `
foreach{
$targetFile = $targetDir + $_.FullName.SubString($sourceDir.Length);
New-Item -ItemType File -Path $targetFile -Force;
Copy-Item $_.FullName -destination $targetFile
}
# Get .csv files
Get-ChildItem $sourceDir -filter "*.csv" -recurse -Exclude $ExclusionFiles | `
foreach{
$targetFile = $targetDir + $_.FullName.SubString($sourceDir.Length);
New-Item -ItemType File -Path $targetFile -Force;
Copy-Item $_.FullName -destination $targetFile
}
My list of files in the main $sourceDir that I need to exclude is getting longer and there are folders I want to exclude as well. Can someone tell me how to,
Copy only a list of specific files in the $sourceDir
Exclude certain folders in $sourceDir from copying
Combine the wildcard search for .jpg and .csv into one statement
I'm still learning so any help would be greatly appreciated!

Answer 1

This is a case where a little bit of Regex will go a long way:
You can filter multiple extensions by using a pretty basic match:
$extensions = 'jpg', 'csv'
$endsWithExtension = "\.(?>$($extensions -join '|'))$"
Get-ChildItem -Recurse |
Where-Object Name -Match $endsWithExtension
You can exclude a list of specific files with one more Where-Object and the -In parameter:
$extensions = 'jpg', 'csv'
$endsWithExtension = "\.(?>$($extensions -join '|'))$"
$ExcludeFileNames = #("InProgress.jpg", "input.csv", "PCMCSV2.csv")
Get-ChildItem -Recurse |
Where-Object Name -Match $endsWithExtension |
Where-Object Name -NotIn $ExcludeFileNames
From there on in, your Foreach-Object is basically correct (nice touch making sure the file exists by using New-Item, though I'd personally assign it's output to null and -PassThru the Copy-Item).
Get-ChildItem $sourceDir -Recurse |
Where-Object Name -Match $endsWithExtension |
Where-Object Name -NotIn $ExcludeFileNames |
Foreach-Object {
$targetFile = $targetDir + $_.FullName.SubString($sourceDir.Length);
New-Item -ItemType File -Path $targetFile -Force;
Copy-Item $_.FullName -destination $targetFile
}