Use editable install to fix coverage

[maxnoe]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (49ab82b) 60.60% compared to head (5ee0e9b) 87.96%.
Report is 2 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #2460       +/-   ##
===========================================
+ Coverage   60.60%   87.96%   +27.35%     
===========================================
  Files           3      231      +228     
  Lines          33    19768    +19735     
===========================================
+ Hits           20    17388    +17368     
- Misses         13     2380     +2367     

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[maxnoe]

Using the editable install fixed coverage.py being able to associate the coverage report with the source files, so now we have correctly working coverage reports again.

Please review @Tobychev @LukasNickel

The muon fit fix is temporary, a proper fix is under investigation in #2425

[Tobychev]

I don't understand what the problem being solved is, nor why doing an editable install would matter. I don't even understand why the muon test needs to be patched in this PR, so I don't think I can provide a meaningful review.

[maxnoe]

I don't understand what the problem being solved is

Codecov reports coverage of 60% on 30 lines, because it doesn't recognize the file paths being tested because we run the tests in a temporary directory using the package installed into the prefix of the python installation.

See: https://app.codecov.io/gh/cta-observatory/ctapipe/

why doing an editable install would matter.

Doing an editable install means the installation is just creating symlinks to the checked out repository, which means that codecov can link the executed code to the source files correctly.

I don't even understand why the muon test needs to be patched in this PR

To be honest, me neither. The test started failing after I added the -e and I fixed it to see if the coverage was ok after I got the tests to run using the editable install, which it does now, see:

https://app.codecov.io/gh/cta-observatory/ctapipe/pull/2460/indirect-changes