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From Antonio Petrelli <antonio.petre...@gmail.com>
Subject Move to Maven? (WAS: Re: Publishing process for JARs for Maven Central)
Date Sat, 17 Dec 2011 20:24:50 GMT
As requested here is a proposal to move to Maven.

2011/12/17 Mark Thomas <markt@apache.org>

> > Using Maven has several benefits (standardization of structure, lots of
> > reusable plugins, supported by major IDEs),
>
> Those are features, not benefits.
>

The standardization of structure is not a feature, but a constraint. When
you use Maven *the right way* you ought to follow a well standardized
structure.


> You are, of course, free to take a look at this. It might be more
> productive to try and make the case for Maven before doing that work


Ok, let's do it again :-D
1. Standardization. Maven strongly encourages to use a standardized
structure. The source should go into src/main/java, the resources in
src/main/resources etc. You can change it, but this is discouraged. With
Ant you always do things differently for different projects.
2. Modularization. Separation between modules is strong, i.e. one jar-one
source directory. In the case of Tomcat, there is a big big trouble: one
single big source directory. Separating them will be one of the most
important step to do.
3. Metadata-driven process. The build process is driven by metadata (where
the source is? where should I deploy it?) and not by commands (compile the
source that is in that point, deploy it in that repository)
4. POMs are (almost) universal. Projects of the same kind have almost the
same content..
5. Plug-ins do generically what pieces of Ant's script do specifically. For
example take the Maven assembly plugin: via a descriptor you obtain a zip
file to distribute.
6. When all the metadata is in place, the release process is a matter of
launching:
mvn release:prepare
and
mvn release:perform

Antonio

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