2011-08-21 21:18:41 +00:00
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This tool is a component of an auto-update system. It is responsible for performing
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the installation of an update after the necessary files have been downloaded
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to a temporary directory.
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2011-08-19 18:59:21 +00:00
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2011-08-21 21:18:41 +00:00
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This tool is responsible for:
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2011-08-19 18:59:21 +00:00
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2011-08-21 21:18:41 +00:00
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* Reading an XML file specifying the contents of an update.
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* Extracting and installing updated files from one or more compressed packages.
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* Removing any files which are no longer needed in the new version of the application.
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2011-08-19 18:59:21 +00:00
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2011-08-21 21:18:41 +00:00
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* Requesting elevated priviledges if required to install the update.
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2011-08-19 18:59:21 +00:00
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2011-08-21 21:18:41 +00:00
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* Displaying a simple updater UI and re-launching the main application
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once the update is installed.
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2011-08-19 18:59:21 +00:00
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2011-08-21 21:18:41 +00:00
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The tool consists of a single small binary which only has a small number of external
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dependencies that need to be present on the target system.
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The external dependencies of the updater binary are:
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* The C++ runtime library (Linux, Mac),
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* pthreads (Linux, Mac),
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* zlib (Linux, Mac)
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2011-08-26 16:40:34 +00:00
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* native UI library (Win32 API on Windows, Cocoa on Mac, GTK on Linux if available)
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2011-08-21 21:18:41 +00:00
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To perform an update, the application (or another separate tool) needs to download
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the updater binary, an XML file describing the update and one or more zip packages
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containing the files for the update to a temporary directory. It then needs
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to invoke the updater, specifying the installation directory, temporary package
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directory and path to the update script file. The updater then installs the
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update and restarts the application when done.
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