Awesome
ExcoverallsUmbrella 
Sample project for excoveralls on umbrella elixir projects.
Configurations
Usage
Overall Reporting
elixir/projects/excoveralls_umbrella$ mix coveralls --umbrella
==> subapp0
..
Finished in 0.05 seconds (0.05s on load, 0.00s on tests)
2 tests, 0 failures
Randomized with seed 390885
==> subapp1
.
Finished in 0.00 seconds
1 test, 0 failures
Randomized with seed 454824
----------------
COV FILE LINES RELEVANT MISSED
100.0% apps/subapp0/lib/subapp0.ex 9 2 0
50.0% apps/subapp1/lib/subapp1.ex 9 2 1
[TOTAL] 75.0%
----------------
Individual Reporting
elixir/projects/excoveralls_umbrella[master*]% mix coveralls
==> subapp0
..
Finished in 0.04 seconds (0.04s on load, 0.00s on tests)
2 tests, 0 failures
Randomized with seed 339490
----------------
COV FILE LINES RELEVANT MISSED
100.0% lib/subapp0.ex 9 2 0
[TOTAL] 100.0%
----------------
==> subapp1
.
Finished in 0.00 seconds
1 test, 0 failures
Randomized with seed 429119
----------------
COV FILE LINES RELEVANT MISSED
50.0% lib/subapp1.ex 9 2 1
[TOTAL] 50.0%
----------------