Facing the error "The command line is too long." when cmd array is very long

[rajaramaniyer]

I am on Windows and OS command length limit is 8191

I traced the line where it fails and it is here:

parallel_tests/lib/parallel_tests/test/runner.rb

Line 115 in d582779

output = IO.popen(env, cmd, popen_options) do |io|

I cannot increase the number of process just to reduce the number of tests in each group. Machine resources are not enough to increase it anymore.

Can we not batch it and run?

Any help in this appreciated!

[grosser]

batching should be possible,
just each_slice the input and then combine the output
... ideally make it automatic in windows and maybe a --max-files-per-test=100 so it is easy to reproduce in any other env

[rajaramaniyer]

I just raised a pull request, suggesting my idea on batching. #981 please have a look.