Code for automating incremented ZIP compression? - powershell

Question

I'm trying to ZIP a folder of 800 pictures, with each ZIP file containing only 10 or less pictures, so I should end up with 80 ZIP files. If anyone knows the BAT file code to do this, I would be very appreciative. I also do NOT want to delete the files after they've been zipped.
I know that I'll probably be using 7-Zip, but I just can't seem to find an answer for this anywhere. Thanks!

Answer 1

Try the following PowerShell:
# Setup variables (Change)
$ZipFolder = "T:\YourFolder\WithFiles\ToZip"
$7Zip = "C:\Program Files\7-Zip\7z.exe"
$NewZipsFolder = "T:\FolderToPut\AllOfThe\ZipsIn"
# Script Variables
$pendingFiles = #()
$fileNumber = 1
# Get a list of all the files to be zipped
Get-ChildItem $ZipFolder | sort $_.FullName | ForEach-Object { $pendingFiles += $_.FullName }
# While there are files still to zip
While($pendingFiles){
# Select first 10 files to zip and zip them
$ToZip = $pendingFiles | Select -First 10
& $7Zip "a" "$NewZipsFolder\File-$fileNumber.7z" $ToZip
# Remove first 10 zipped files from pending files array
$pendingFiles = $pendingFiles | Where-Object { $ToZip -notcontains $_ }
$fileNumber++
}
This will create a list of all the file that need to be zipped. Then zip them up in batches of 10 files using 7z.exe (7-zip).
Note: For the variables $ZipFolder & $NewZipsFolder do not put a trailing backslash on the folder paths (\).

Answer 2

You could store an list of files in Powershell using something along the lines of
$fileList = Get-Item -Path "C:\MyPhotosDir\*"
Then set an alias for 7zip
set-alias sz "$env:ProgramFiles\7-Zip\7z.exe"
Then create a loop with a counter along the lines of
$i = 1
foreach $file in $fileList
#Build foder name name
$folderDir = "C:\MyPhotoArchive$($i - ($i % 10) + 1).7z"
sz a -t7z $folderDir $file.filename
end for
I have been writing in VB for a short while and so apologies if the Powershell syntax is a bit off. Essentially that should add 10 files to "C:\MyPhotoArchive1", 10 files to "C:\MyPhotoArchive2". I haven't added files to an archive using 7zip for a long time but I think the call just uses a a and should add files to an archive, creating one when needed.