etlegacy/Update-Installer
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Small cross-platform software update installer
124 commits 6 branches 11 tags 5.3 MiB
C++ 76.3%
Ruby 13%
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Robert Knight 098c9cb194 When re-launching the application after an update is installed, do it from a non-elevated process. 
Previously the application was restarted from the main install process, which may have
  been elevated.  The main application must be started from a non-elevated updater/updater.exe
  process otherwise the main app will inherit the elevated status from its parent.

  * Modify ProcessUtils::runElevated() to return the status code of the process
  * Change UpdateInstaller to run the main installation synchronously from the initial
    updater process in the case where elevation is not required.
  * Remove calls in main.cpp to relaunch the main application after the UI is closed.
2011-08-26 11:17:09 +01:00
external Add pre-built zlib library to build tree for Windows builds 2011-08-23 20:38:20 +01:00
src When re-launching the application after an update is installed, do it from a non-elevated process. 2011-08-26 11:17:09 +01:00
tools Add a script which creates the file_list.xml file and compressed packages for autoupdates from an installation directory and a package -> file map. 2011-08-25 18:55:23 +01:00
CMakeLists.txt Merge branch 'master' of ssh://gitweb/git/desktop/standalone-updater 2011-08-24 10:46:17 +01:00
README Improve the description of the tool in the README file 2011-08-21 22:27:10 +01:00
TODO Update the TODO file with new tasks 2011-08-26 11:16:26 +01:00

README 

This tool is a component of an auto-update system.  It is responsible for performing
the installation of an update after the necessary files have been downloaded
to a temporary directory.

This tool is responsible for:

 * Reading an XML file specifying the contents of an update.
 
 * Extracting and installing updated files from one or more compressed packages.
   
 * Removing any files which are no longer needed in the new version of the application.

 * Requesting elevated priviledges if required to install the update.

 * Displaying a simple updater UI and re-launching the main application
   once the update is installed.

The tool consists of a single small binary which only has a small number of external 
dependencies that need to be present on the target system.

The external dependencies of the updater binary are:

 * The C++ runtime library (Linux, Mac),
 * pthreads (Linux, Mac),
 * zlib (Linux, Mac)
 * native UI library (Win32 API on Windows, Cocoa on Mac).

To perform an update, the application (or another separate tool) needs to download
the updater binary, an XML file describing the update and one or more zip packages
containing the files for the update to a temporary directory.  It then needs
to invoke the updater, specifying the installation directory, temporary package
directory and path to the update script file.  The updater then installs the
update and restarts the application when done.