Noticed by browsing somebody else's CI output:

 hg identify: option -d not recognized

But, as you can see in this file: https://github.com/codecov/codecov-python/blob/master/codecov/__init__.py#L865 the command's intent is to provide -d not to hg id, but to tr. It doesn't work because by default shell argument of try_to_run() is False.

The fix could be to just provide shell=True to that function, but I suggest to replace the whole call with try_to_run(['hg', 'log', '-r', '.', '-T', '{node}']).

Thank you for supporting Mercurial. If you have any questions, feel free to ping me.