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LaunchConfiguration contains a line ResourcesPlugin.getWorkspace().build(IncrementalProjectBuilder.INCREMENTAL_BUILD, new SubProgressMonitor(buildMonitor, 3)); This can easily constitute a long running blocking operation. Let's assume I have a bunch of Eclipse plugins projects which build quickly, and a non-built JS project that takes age to validate, and a bunch of Maven jobs that would have to resolve depdencies. If I do run this Launch Configuration to start an Eclipse application made only of my Eclipse plugins, I'll have to wait for ages for the whole workspace build, whereas the actual useful projects of this Launch Configuration are already built.
Tentative for some time in 4.8 stream.
It may be the responsibility of specific Launch Configurations to override it. The use-case mentioned in comment 0 may be something that's more a PDE issue than a Debug one.
Are you sure this scenario happens? If so can you give an example. From what I found, The whole workspace only builds due to your given line if the run delegate is not an instance of ILaunchConfigurationDelegate2 or is and instance of ILaunchConfigurationDelegate2 and buildForLaunch returns false. In your given scenario, the AbstractPDELaunchConfiguraiton will not return false as far as my tracing shows, and will only build the plugins specified in the run configuration. Also tested this by including a small un-built java project in my workspace with other plugins, running configuration and seeing that the the java project was not built.
Thanks for investigating Lucas. I have to admit that while I often encountered this issue, I don't have checked the details and will look more carefully next time it happens (maybe it was a JUnit Plugin tests or something like that...). I suggest we put this ticket on hold, and I'll add more details when I know better how to reproduce the symptom.
