I would like to get the latest files (from the current release) and just place into my portable apps folder to verwrite my version.
Now my question: Is there any official repository, FTP-server URL etc. to get the Win Build with all the uncompressed files, but not as MSI, because obviously I don't want to run the full MSI installer.
We actually serve all our stable installers on https://download.owncloud.com/desktop/stable/ - you can easily scrap that directory listing to get the .exe installers. I have this really crappy script that runs as a cronjob and downloads the latest daily builds for Windows and macOS on a disk location:
#!/usr/bin/env bash
# Dummy cronjob to download the latest daily releases of the oC client
# from http://download.owncloud.com/desktop/daily/ via wget. Both for
# Windows and OS X systems.
#
# Samuel Alfageme <samuel@owncloud.com>
BASE_URL='http://download.owncloud.com/desktop/daily/'
EXTENSION=${1}
TARGETDIR=${2}
if [[ ${EXTENSION} = '.pkg' || ${EXTENSION} = '.exe' ]]; then
# Scrap the URL to get the name of the latest build - .exe for now
BIN_NAME=$(wget --execute="robots = off" -q -O - ${BASE_URL} | grep -o -E "ownCloud[^<>]*?${EXTENSION}" | tail -1)
# Download and save in TARGETDIR location
wget -P ${TARGETDIR} ${BASE_URL}${BIN_NAME}
fi
However, we currently don't serve uncompressed installers as it's not a very common use-case. But this can be as easy as piping the downloaded installer into a compressing utility with CLI.