Hi Kristopher,

> -----Original Message-----
> From: Kristopher Brown
[mailto:[EMAIL PROTECTED]
> Sent: 13 May 2004 17:18
> To: [EMAIL PROTECTED]
> Subject: Inter-plugin dependancy best practices
> 
> Hi,
> 
> How should plugin developers indicate that a plugin is inter-dependant
> on anther plugin?  Some have suggested a registering mechanism like
that
> used by the site report.  Another way is by modifying a shared
variable.
> 

There is already a mechanism in place. It's called dependencies. Simply
add a dependency of type "plugin". For example:

<dependency>
  <groupId>xxx</groupId>
  <artifactId>yyyy</artifactId>
  <version>454354</version>
  <type>plugin</type>
</dependency>

It has the added advantage to automatically download the dependent
plugins if you don't have them in your local repository.

The only issues I know are:
- you would usually like to say "use version > X.Y" instead of "use
version X.Y". If you say "use version X.Y" then you'll have to remember
to upgrade the version every time the dependent plugin changes...
- if the user wants to use a given version of the dependent plugin then
he cannot. A use case for that is for example if there is a bug in the
version used then the user will want to use a previous version. I got
this problem with the Cactus plugin which was depending on fixed
versions of the war and ear plugins and some users complained.

[snip]

Thanks
-Vincent


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