Calling 7-Zip from powershell
I had to write a little utility-script to backup and restore some files used for testdata. First i tried a commandline plugin for IZarc which seemed to select the wrong set of files…
I decided to use 7-Zip after reading this post:John Robbins blog which helped me with the -o option.
What i struggled with was how to call 7-Zip, but The PowerShell Guy came to my rescue.
So here is my little example script to call 7-Zip from powershell.
# Alias for 7-zip if (-not (test-path "$env:ProgramFiles\7-Zip\7z.exe")) {throw "$env:ProgramFiles\7-Zip\7z.exe needed"} set-alias sz "$env:ProgramFiles\7-Zip\7z.exe" # directories to use $base = 'C:\dev\ps\ziptest\' $Extract = 'C:\dev\ps\ziptest\to dir\' $zipdir = 'C:\dev\ps\ziptest\zip dir\' # Zip-file name $yy = "test" $zipfile = $zipdir + 'zz' + $yy+ '.zip' $zipoption = ' -tzip "' + $zipfile + '"' # Files to compress $from = $base + "from\*.*" # Create zip-file write-host "from:" $from write-host "zipopt:" $zipoption remove-item "$zipfile" sz a -tzip "$zipfile" $from # Extract files from archive # Since the -o option to 7Z.EXE cannot have a space between it and the # directory there's a bit of a problem. PowerShell does not expand the # line -o$Extract if passed directly on the command line. # John Robbins blog # http://www.wintellect.com/cs/blogs/jrobbins/archive/2008/04/20/easily-downloading-and-installing-the-sysinternals-suite.aspx $outputOption = "-o$Extract" Write-Output "Extracting files into $Extract" write-host "output:" $outputOption sz e -tzip "$zipfile" $outputOption -y # Show contents of archive sz l -tzip "$zipfile"
