June 2005
Beginner
224 pages
5h 40m
English
Content preview from Maven: A Developer's Notebook
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Auto-Downloading a Plug-in
Maven has a Plugin plug-in that allows you to download and install plug-ins from one or several Maven remote repositories. To use it, type the following on a single line:
maven plugin:download -DgroupId=[plug-in group id] -DartifactId=[plug-in artifact id] -Dversion=[plug-in version]
where:
[plug-ingroupid]is the plug-in'sgroupId. For all plug-ins provided by Maven, that'smaven.[plug-inartifactid]is the plug-in'sartifactId. For example, for the JAR plug-in that'smaven-jar-plugin.[plugin-inversion]is the version of the plug-in you wish to download.
The best way to get these values is to know the URL where the
plug-in JAR is located and to deduce these values from the URL. Figure
A-1 shows an example of the URL for the JAR plug-in version 1.7 located
on ibiblio. The values of artifactId,
groupId, and version can easily be deduced.
Figure A-1. Mapping between plug-in URL and groupId, artifactId, and version for the Jar plug-in v1.7
If you don't specify the Maven remote repository to use, Maven
will use ibiblio by default. You can change it by defining the maven.repo.remote property (either on the
command line or in your properties files). This property defines the
list of remote repositories to use. For example, to specify both ibiblio
and maven-plugins.sf you would
write:
maven.repo.remote = http://www.ibiblio.org,http://maven-plugins.sf.net/maven
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.