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diff --git a/external/onlineupdate/README.md b/external/onlineupdate/README.md new file mode 100644 index 0000000000..5b0d08146e --- /dev/null +++ b/external/onlineupdate/README.md @@ -0,0 +1,44 @@ +# 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 `update` directory 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 +``` |