sigal serve --browser : open in your default browser

[Lucas-C]

Hi!

First, thank you very much for maintaining this tool.
Thanks yo you, yesterday I was able to very quickly setup a web gallery that perfectly suited my need.

This very short contribution introduces a hand --browser / -b flag to the sigal serve command, that opens the sigal gallery in the user default web brower, using the standard Python module webbrowser.

I did not add a unit test to tests/test_cli.py, because it seemed difficult to me to test the standard behaviour of the webbrowser stanbdard package.
If need be, I can add one that ensure that webbrowser.open() gets called, using a mock.

[codecov]

Codecov Report

Attention: Patch coverage is 60.00000% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 88.54%. Comparing base (eea2c56) to head (cf223ce).

Files	Patch %	Lines
src/sigal/__main__.py	60.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #516      +/-   ##
==========================================
- Coverage   88.61%   88.54%   -0.08%     
==========================================
  Files          25       25              
  Lines        2073     2077       +4     
==========================================
+ Hits         1837     1839       +2     
- Misses        236      238       +2     

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[saimn]

Thanks ! I had this idea a long time ago but seems it was forgotten :)
A mock test doesn't seem necessary for 2 lines.

[Lucas-C]

Thanks ! I had this idea a long time ago but seems it was forgotten :) A mock test doesn't seem necessary for 2 lines.

Thanks for accepting my contribution, and for doing so quickly 🙂