roslint python errors to stdout?

asked 2019-10-17 11:53:28 -0600

8729 ●137 ●239 ●256 https://github.com/lucasw

updated 2021-03-01 09:50:38 -0600

I'm running roslint within travis like this:

catkin build $(catkin list --depends-on roslint -u) --no-deps --catkin-make-args roslint

When there is a lint error in C++ it is visible in stdout and is easy to read, but python errors are in a log file like this:

Errors     << foo_pkg:make /home/lucasw/catkin_ws/logs/foo_pkg/build.make.472.log

Adding --verbose works but there is a ton of other output also obscuring the actual error- is there a way to just get the python lint error?

answered 2021-03-01 00:09:38 -0600

Rufus
1083 ●45 ●102 ●89

You can do so by making pep8 redirect stdout to stderr with the following in your CMakeLists.txt

set(ROSLINT_PYTHON_OPTS "1>&2")
roslint_python()

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That works, but it seems like there ought to be a standard option to do that, I looked at the roslint pycodestyle.py source and tried out some options but they didn't have any effect when deliberately introducing pep8 violations:

set(ROSLINT_PYTHON_OPTS "--show-source")
set(ROSLINT_PYTHON_OPTS "--show-pep8")
set(ROSLINT_PYTHON_OPTS "--verbose")

or in combination

set(ROSLINT_PYTHON_OPTS "--show-source" "--show-pep8")

lucasw ( 2021-03-01 09:45:40 -0600 )edit

I think the key is to have outputs print to stderr which is what cpplint does. However, there doesn't seem to be any option to have pep8 output to stderr.

Rufus ( 2021-03-01 20:49:46 -0600 )edit

Example of disabling all the default ignores (E121,E123,E126,E226,E24,E704,W503,W504):

set(ROSLINT_PYTHON_OPTS "--ignore=''" "1>&2")

lucasw ( 2021-09-08 10:55:00 -0600 )edit

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