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From "Vincenzo Mancini (JIRA)" <j...@codehaus.org>
Subject [jira] Created: (MNG-4885) Why incremental build is not supported natively by Maven?
Date Tue, 02 Nov 2010 19:17:03 GMT
Why incremental build is not supported natively by Maven?
---------------------------------------------------------

                 Key: MNG-4885
                 URL: http://jira.codehaus.org/browse/MNG-4885
             Project: Maven 2 & 3
          Issue Type: Bug
            Reporter: Vincenzo Mancini


I have a multi-module project with two sub-modules. I compile and package it without mistakes.
The build is complete. Then I make a change in one {{.java}} file in one of them. And now
I'm trying to package the whole project again. Maven re-runs tests in both two modules, static
code analysis in both modules, etc.

Why so? It's a very ineffective way of building, as far as I understand. Maybe maven can introduce
a mechanism of "dependency discovery" between files. Like:

{noformat}
foo.jar depends on:
  abc.java
  cde.java
bar.jar depends on:
  xxx.java
{noformat}

When there is a change in {{cde.java}} only - maven SHOULD NOT do anything with {{bar.jar}}.
This is how Unix {{make}} utility is working... Thanks.

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