You are not missing something. The feature is not available yet in the
JGit that we use. See this eclipse bug:
https://bugs.eclipse.org/bugs/show_bug.cgi?id=299315
Looks like someone submitted a patch for it. Once it is released it will
be picked up and included in Geppetto.
In order to trigger the pre-commit hook, you need to drop to the command
line when comitting. You can do the rest of the git work within Geppetto.
Regards
- henrik
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