[GitHub] jglick commented on issue #504: Skip CoS copying of class files when the target is already newer, such as from an external compilation

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jglick commented on issue #504: Skip CoS copying of class files when the target is already newer, such as from an external compilation
URL: https://github.com/apache/incubator-netbeans/pull/504#issuecomment-396050212
 
 
   I realized that in the case of Maven there is a way to combine CoS-like recompilation and test run (not sure about main class run) into a single tool execution: create an ephemeral POM in a temp dir listing the open projects with snapshot relationships as `<modules>`, then
   
       mvn resource:copy compiler:compile surefire:test -f /tmp/pom123.xml -DignoreMissingTests -Dtest=MyTest#case
   
   or similar. Compared to using `javax.tools.JavaCompiler` this is a bit safer still, since even POM misinterpretations by the IDE would only affect editor functions, not test runs; and I think the overhead would be modest. (Maven CoS already runs `mvn`.)
   
   TBD what is best for (managed or freeform) Ant- or Gradle-based builds, but this reinforces the notion that the project type can keep CoS functionality closer to the build system.

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