Steve Loughran wrote:
What do IDEs do to stop ant builds? just kill the thread/process?

NB behaves as follows:

1. It sets a special flag. The next time any BuildListener/BuildLogger method is called on the IDE's listener, it will throw a BuildException, which usually stops the build.

2. If several seconds have elapsed with no listener method, or if the build did not stop for any other reason, Thread.stop is called.

For example, if <java fork="true"> is the active task, any output printed will cause #1 to be triggered. Otherwise, ThreadDeath is caught by the task, which stops the external process and then rethrows.

Not perfect but seems to work reasonably well in practice. #2 could probably be improved to first try Thread.interrupt and only use Thread.stop as a last resort.

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