Compress-Archive handle files with same name in Powershell - powershell

Question

I'm writing an archiving script which collecting desired files to an array then adding them to an archive 1 by 1.
I came to a problem when there is DIR1/file.ext and DIR2/file.ext because DIR2's file going to overwrite the previous.
How can I set unique filename or how it's possible to solve it on the fly instead of copying files to a dir with structures then zip the whole dir?
Here is my code:
# GET FILE LIST
$outgoingfiles = Get-ChildItem -Depth 1 -Filter "*.EXT" | Where-Object { $_.DirectoryName -like "*OUTGOING*" }
# Handle if OUTGOING/archive dir is exists
if(-not (Test-Path "OUTGOING/archive")) {
New-Item -Path "OUTGOING/archive" -ItemType Directory
}
# ZIP outgoing files
ForEach ($outgoing in $outgoingfiles) {
Compress-Archive $outgoing.FullName -Update -DestinationPath $zippath
}
Thank you!

Answer 1

I don't think there is a way to tell Compress-Archive to rename files when a file with the same name is already included in the zip.
What you can do is create a temporary folder, copy all files to there and if needed rename them. Then create the zip file using the unique files in that folder.
Finally, remove the temp folder again:
$zippath = 'D:\Test\OutGoing.zip' # path and filename for the output zip file
$rootPath = 'D:\Test' # where the files can be found
# create a temporary folder to uniquely copy the files to
$tempFolder = Join-Path -Path ([System.IO.Path]::GetTempPath()) -ChildPath ([Guid]::NewGuid().Guid)
$null = New-Item -ItemType Directory -Path $tempFolder
# create a hashtable to store the fileHash already copied
$fileHash = #{}
# get the list of files and copy them to a temporary folder
Get-ChildItem -Path $rootPath -Depth 1 -Filter '*.EXT' -File | Where-Object { $_.DirectoryName -like "*OUTGOING*" } | ForEach-Object {
$count = 1
$newName = $_.Name
# test if the file name is already in the hash and if so, append a counter to the basename
while ($fileHash.ContainsKey($newName)) {
$newName = "{0}({1}){2}" -f $_.BaseName, $count++, $_.Extension
}
# store this file name in the hash and copy the file
$fileHash[$newName] = $true
$newFile = Join-Path -Path $tempFolder -ChildPath $newName
$_ | Copy-Item -Destination $newFile -Force
}
# append '*.*' to the temporary folder name.
$path = Join-Path -Path $tempFolder -ChildPath '*.*'
# next, get the list of files in this temp folder and start archiving
Compress-Archive -Path $path -DestinationPath $zippath -Update
# when done, remove the tempfolder and files
Remove-Item -Path $tempFolder -Force -Recurse
Hope that helps

Answer 2

I would just copy the files along with their parent directories to a destination folder, then zip it up with Compress-Archive. Then you don't have to worry about making filenames unique.
Demo:
$sourceFolder = "C:\\"
$destinationFolder = "C:\\OUTGOING"
# Create destination folder if it doesn't exist
if (-not(Test-Path -Path $destinationFolder -PathType Container))
{
New-Item -Path $destinationFolder -ItemType Directory
}
# Get all .exe files one level deep
$files = Get-ChildItem -Path $sourceFolder -Depth 1 -Filter *.ext
foreach ($file in $files)
{
# Get standalone parent directory e.g. DIR1, DIR2
$parentFolder = Split-Path -Path (Split-Path -Path $file.FullName) -Leaf
# Create destination path with this parent directory
$destination = Join-Path -Path $destinationFolder -ChildPath $parentFolder
# Create destination parent directory if it doesn't exist
if (-not(Test-Path -Path $destination -PathType Container))
{
New-Item -Path $destination -ItemType Directory
}
# Copy file to parent directory in destination
Copy-Item -Path $file.FullName -Destination $destination
}
# Zip up destination folder
# Make sure to pass -Update for redoing compression
Compress-Archive -Path $destinationFolder -DestinationPath "OUTGOING.zip" -Update -CompressionLevel Optimal