Friday, October 16, 2009

Recipe 12.1 Installing a Plug-in











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Recipe 12.1 Installing a Plug-in







12.1.1 Problem





You want to install an Eclipse

plug-in.









12.1.2 Solution





Download the plug-in, and expand it in

the Eclipse

plugins directory.









12.1.3 Discussion





Numerous plug-ins are available already, and many are free for the

downloading. To install a plug-in, stop Eclipse if

it's running, and download the plug-in to the

eclipse directory, the

directory that contains the workspace and

plugins directories.







You can find more than 450 Eclipse plug-ins at http://www.eclipse-plugins.2y.net/eclipse/,

and most of them are free. About 7,000 plug-ins are downloaded

everyday from this site. Many of them support what Eclipse left

out�especially drag-and-drop development for environments such

as Swing, Struts, and SWT.








Eclipse plug-ins come zipped

or tarred, and you typically

uncompress them in the eclipse

directory. When uncompressed, the files for the plug-ins

are stored automatically in the

plugins and

features directories.





Each plug-in gets its own folder in the Eclipse

plugins directory.

Typically, you'll find the following files in every

plug-in's folder:






*.jar





The code for the plug-in, stored in a .jar file






about.html





Shown when the user requests information about the plug-in






icons





Directory for icons (the standard is GIF format)






lib





Holds library .jar files






plugin.xml





The plug-in manifest, which is what describes the plug-in to Eclipse






plugin.properties





Holds text data used by plugin.xml











Although you usually uncompress plug-ins in the

eclipse directory, some

plug-ins are designed to be unzipped in the

plugins directory. If installation instructions

for the plug-in are unavailable, open the plug-in using an unzip or

untar tool, and take a look at how it'll expand

itself�the file plugin.xml always has to

go into a subdirectory of the plugins directory.








That's all you need to do to install a plug-in.

After expanding the plug-in's compressed file, start

Eclipse again. You might see a dialog indicating that configuration

changes are pending; restart Eclipse again if necessary.



















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