Process logger

[AWolf81]

Summary: Some tasks don't have a terminal where messages are logged (e.g. eject). So debugging is pretty difficult.

That's why I'd like to add a process logging service. I've added it to all child processes except CreateProject - I think we can add more logging later.

The logging can be enabled/disabled in app/config.js with LOGGING. Logging is always disabled in production. Maybe we could add a command line argument so logging could be enabled if required e.g. with --debug in production.

Please let me know what do you think - is it worth to add? For me it helped to see why eject task failed.

[superhawk610]

Shameless plug for my logging package. Giving these logs their own colors or a single color for all of them would make them stand out from other miscellaneous messages in the console.

[AWolf81]

@superhawk610 Not sure if we can use your logging package as there are control characters inside the logs that are not properly parsed - I think they would tell something about coloring. For coloring we could also use chalk. I think it's OK to have it not colored but the control characters are a bit confusing. Maybe we could strip them out so debugging is easier.

[AWolf81]

@melanieseltzer what do you think? Anything open except the log for devServer where it is not really needed but I like it as we sometimes have a stripped down logging in the Guppy output - so we can see everything.

I think we could improve this and the control characters in the console later. I'd like to have it as this is pretty useful. I needed it for the refactoring of the project creation so I merged it into that branch.

[codecov[bot]]

Codecov Report

Merging #287 into master will increase coverage by 0.09%. The diff coverage is 46.15%.

@@            Coverage Diff             @@
##           master     #287      +/-   ##
==========================================
+ Coverage   20.09%   20.18%   +0.09%     
==========================================
  Files         235      236       +1     
  Lines        3648     3661      +13     
  Branches      368      370       +2     
==========================================
+ Hits          733      739       +6     
- Misses       2648     2654       +6     
- Partials      267      268       +1

Impacted Files	Coverage Δ
src/config/app.js	100% <ø> (ø)	:arrow_up:
src/services/dependencies.service.js	25% <0%> (-1.32%)	:arrow_down:
src/sagas/task.saga.js	60.71% <100%> (+1.08%)	:arrow_up:
src/services/process-logger.service.js	33.33% <33.33%> (ø)