patch for sparkle-cli to keep a copy of downloaded update

[core-code]

trafficstars

here is a patch for sparkle-cli to accept a '--backup-path' flag to store a copy of the downloaded update there

patch.diff.txt

[kornelski]

Can you tell more about it? What is it for?

[core-code]

in case you want to have the download (ZIP/DMG) for future reference. just specify sparkleCLI --check-immediately --backup-path /path/to/file and the download will be copied to /path/to/file.ext (the extension will be added because it is not known upfront)