Question

If my ivysettings.xml file includes:

<url name='com.springsource.repository.bundles.external'>     <ivy pattern='http://repository.springsource.com/ivy/bundles/external/[organisation]/[module]/[revision]/[artifact]-[revision].[ext]' />     <artifact pattern='http://repository.springsource.com/ivy/bundles/external/[organisation]/[module]/[revision]/[artifact]-[revision].[ext]' /> </url> 

And my ivy.xml file includes:

<dependency org='org.junit'             name='com.springsource.org.junit'              rev='4.4.0' /> 

From when I ran Ivy, I can tell that this resolves to: http://repository.springsource.com/ivy/bundles/external/org.junit/com.springsource.org.junit/4.4.0/com.springsource.org.junit-sources-4.4.0.jar

So the resolutions go:

[organization] => 'org.junit' [module] => 'com.springsource.org.junit' [revision] => '4.4.0' [artifact] => 'com.springsource.org.junit-sources' [ext] => 'jar' 

I see how ivy resolves the [organisation], [module], and [revision] in the URL pattern (duh), but how does it resolve [artifact] and [ext]?

The documentation on the URL resolver seems to be lacking.

Answer 1

Ivy first resolves the <ivy pattern... />, with the organization, module, and revision given, and with the [artifact] hardcoded as ‘ivy’ and [ext] hardcoded as ‘xml’. This yields a URL, in this case:

http://repository.springsource.com/ivy/bundles/external/org.junit/com.springsource.org.junit/4.4.0/ivy-4.4.0.xml

This is the ivy configuration file for this module. Among other things, this ivy configuration file contains information about other artifacts, in particular:

<artifact name='com.springsource.org.junit-sources' type='src' ext='jar'/> <artifact name='license' type='license' ext='txt'/> 

These two are then used to complete the <artifact pattern... /> part – to download the license and to download the jar file.