Fix get_depends returning 1st run) none then on 2nd run) fewer pkgs #144
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Issue: As described in #142.
Suggested solution
Note that I'm not adding a test case for this specific issue. To reproduce this issue requires traversing the dependency chain AFAICT, but looks like CI environment is kept plain so no ros pkgs are installed thus hard to replicate the environment.
get_depends
is tested in multiple test cases (e.g. test_rospkg_packages.py).Output
See the output in #142 (comment)