Difference between revisions of "Platform Team/Sweets Distribution/Features/Plugins"

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Plugins are pluggable Sugar Shell code. By design, plugins are not isolated from the rest of shell code and each other, thus, they are assumed to be setup by Sugar distributors or experienced users.
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#REDIRECT [[Deployment Platform/Sugar Shell]]
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A plugin is a Python module placed in a {{Code|/opt/sweets/sugar/src/jarabe/plugins/''PLUGIN_NAME''}} directory. To make a plugin module useful, it should contain the following variables and functions:
 
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* {{Code|'''ORDER'''}}<br>Required. Variable with plugin order. Plugins with smaller {{Code|ORDER}} will be initiated and started earlier.
 
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* {{Code|'''TITLE'''}}<br>Optional. This title will appear in the ''Sweets Distribution'' Control Panel component in order to provide a user the opportunity to enable/disable the plugin. If {{Code|TITLE}} is omitted, the plugin will be enabled unconditionally.
 
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* {{Code|'''init()'''}}<br>Required. Initialize the plugin. This function will be called before the Shell initialization phase, so, it is possible to put [[Wikipedia:Monkey patch|monkey patching]] code here.
 
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* {{Code|'''start()'''}}<br>Required. Start the plugin. Actual starting the plugin. This function will be called when Shell starts heavy code like Journal.
 
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* {{Code|'''binding()'''}}<br>Optional. Posix shell commands to source before starting the Sugar Shell. Function should return a list of strings. Resulting lines will be sourced before starting the Sugar Shell process. Note that sourcing will happen before starting DBus session and after X session.
 
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* {{Code|'''control_panel_section()'''}}<br>Optional. If it exists, it should return a widget to place as a sub-section in the ''Sweets Distribution'' Control Panel section. The returning widget should take care of reading/writing the plugin configuration on its own, and should assume the application of configuration changes right after making them, i.e., without any apply buttons. The regular way to handle plugin configuration is using {{Code|Option}} class like the example code does below.
 
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Use [http://git.sugarlabs.org/desktop/sugar-example-plugin example plugin] source as a template for new ones.
 

Revision as of 01:08, 4 June 2013

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