Simple leader selection utility

[jordanschalm]

A basic utility for reading leader selection for a view range from a snapshot input. Made this last week while debugging networking issues.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 44 lines in your changes missing coverage. Please review.

Project coverage is 41.25%. Comparing base (22768aa) to head (5e8ae24).
Report is 27 commits behind head on master.

Files with missing lines	Patch %	Lines
cmd/util/cmd/leaders/cmd.go	0.00%	43 Missing ⚠️
cmd/util/cmd/root.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #7160      +/-   ##
==========================================
+ Coverage   41.24%   41.25%   +0.01%     
==========================================
  Files        2171     2171              
  Lines      190064   190091      +27     
==========================================
+ Hits        78385    78431      +46     
+ Misses     105129   105121       -8     
+ Partials     6550     6539      -11     

Flag	Coverage Δ
unittests	41.25% <0.00%> (+0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[peterargue]

what's the usage? something like

cat snapshot.json | util ...

would it make sense to accept a path to the snapshot file as an argument instead?

[jordanschalm]

That is the usage. We were starting from some jq queries so the shortest path was something with the same input scheme. I don't mind adding the file IO in the command -- that is probably more consistent with the rest of the util commands.