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Maven: Don’t just blindly “mvn clean install”

 
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Suppose you have a multi-module Maven project, with a ton of modules, two of them being fancynewtool-db and fancynewtool-rest. fancynewtool-rest has fancynewtool-db as a dependency. What happens if you cd into the rest-module and do a mvn clean compile/test for the first time? Maven will tell you that it cannot resolve the db-module dependency. And now your instinct might be to do a blind mvn clean install in the parent project, because that is just the way Maven works ™.

A full mvn clean install works, but is simply not the fastest and most efficient way. Read more...
 
Consider Paul's rocket mass heater.
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