[IMP] Add list-missing command

[hparfr]

List missing modules in a new command

Because manifestoo tree | grep not installed | sed .... is not handy

[hparfr]

By the way, how do we run tests in this project ? :-)

[codecov-commenter]

Codecov Report

Merging #22 (92f238b) into main (018cffb) will increase coverage by 0.04%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main      #22      +/-   ##
==========================================
+ Coverage   94.22%   94.26%   +0.04%     
==========================================
  Files          21       21              
  Lines         658      663       +5     
  Branches      126      126              
==========================================
+ Hits          620      625       +5     
  Misses         21       21              
  Partials       17       17              

Impacted Files	Coverage Δ
src/manifestoo/main.py	77.98% <100.00%> (+1.05%)	⬆️

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[sbidoul]

List missing modules in a new command

Why not :)

By the way, how do we run tests in this project ? :-)

I guess I'll need to document that. In the meantime:

$ pipx install tox
$ tox -e py38

or, in an active virtualenv with a recent pip

$ pip install -e .[test]
$ pytest

[sbidoul]

LGTM. Can you update documentation ?

[sbidoul]

Looks good. Can you squash and add a news/22.feature with a short changelog entry ?

[hparfr]

Looks good. Can you squash and add a news/22.feature with a short changelog entry ?

Done

[sbidoul]

Hm, 2 pre-commit failures:
1/ black crashing, probably due to click 8.1 - I upgraded it, please rebase
2/ a missing new line in the newsfragment

[hparfr]

Thanks @sbidoul

[sbidoul]

Thanks to you for the contrib, @hparfr