etlegacy/Update-Installer
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Small cross-platform software update installer
39 commits 6 branches 11 tags 5.3 MiB
C++ 76.3%
Ruby 13%
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Robert Knight 07ed391080 Fix incorrect buffer size calculation in ProcessUtils::runAsyncUnix() 
The buffer needs one entry for the executable path, args.size()
  args for the supplied arguments and one further entry for the null
  terminator.
2011-08-22 14:37:39 +01:00
external Remove dependency on Boost::Thread and use the TinyThread library instead. 2011-08-22 14:00:00 +01:00
src Fix incorrect buffer size calculation in ProcessUtils::runAsyncUnix() 2011-08-22 14:37:39 +01:00
CMakeLists.txt Remove dependency on Boost::Thread and use the TinyThread library instead. 2011-08-22 14:00:00 +01:00
README Improve the description of the tool in the README file 2011-08-21 22:27:10 +01:00
TODO Add support for the old-format updater command-line syntax. 2011-08-22 12:59:08 +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.