In a multiproject environment Assembly causes many unneded rebuilds
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Key: MASSEMBLY-163
URL: http://jira.codehaus.org/browse/MASSEMBLY-163
Project: Maven 2.x Assembly Plugin
Issue Type: Bug
Affects Versions: 2.1
Environment: Linux Gentoo, Java 1.5.0_07_b3 sun, Maven 2.0.4, plugin
2.1
Reporter: Simone Gianni
I have a project subdivided in 10 modules. 2 of these modules uses the assembly
plugin with the built-in descriptor "jar-with-dependencies".
When running mvn clean install (or also only maven install) from the root of
the project, I see that every time it is building one of the two sub-projects
that uses the assembly plugin, it rebuilds some already built projects, even if
they are not dependencies of the "to be assembled" project, nor they have any
other apparent motivation to be rebuilded. One of the two project using
assembly doesn't even has a single dependency on other project, but triggers a
nearly complete rebuild.
One of the projects is a WAR overlaying another war, useless to say that it
consumes a lot of time, and gets built 3 times.
I've tested also with -o to exclude possible changes in external dependencies,
checked all the dependency tree to make sure that there were no circular or
otherwise "crossed" dependencies, changed the order of <modules> in the parent
pom to the best build order, checked by hand starting from an empty local
repository that building the artifacts (by hand, one by one, commenting out the
assembly) in that order satisfies all the dependencies.
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