Online Update
Online update implementation based on Mozilla's MAR format + update mechanism
The source code has been extracted from https://github.com/mozilla/gecko-dev with external/onlineupdate/generate-sources.sh.
The source/service directory contains the code for the silent windows updater that avoids the repeated administrator check for an update.
Note
The updater executable should not depend on any other dynamic library in the LibreOffice installation as we would need to copy that one also to a temporary directory during update. We can't update any library or executable that is currently in use. For the updater executable we solve this problem by copying the updater before using it to a temporary directory.
On Windows we use the system to provide us with a crypto library whereas on Linux we use NSS.
Update Procedure
The updater executable is run two times. In a first run, the current installation is copied to an
update directory and the update is applied in this update directory. During the next run, a
replacement request is executed. The replacement request removes the old installation directory and
replaces it with the content of the update directory.
User Profile in the Installation Directory
The archive based installations have the user profile by default inside of the installation directory. During the update process this causes some problems that need special handling in the updater.
- The
updatedirectory is inside of the user profile resulting in recursive copying. - During the replacement request the updater log is in the user profile, which changes location from the actual location to a backup location.
Executable_test_updater_dialog
To run that manual test, do
$ cp instdir/program/updater.ini workdir/LinkTarget/Executable/test_updater_dialog.ini
$ workdir/LinkTarget/Executable/test_updater_dialog
$ rm workdir/LinkTarget/Executable/test_updater_dialog.ini