Sys

Readdir

List and walk directory using system utils ls. This offer an alternative to stdlib's filepath.Walk(). Their behaviours are the same most of the time (read from ls is much slower though), but it's the rare cases that they are different make this alternative useful (on network devices differences are observed, so as during travis-CI build broken)

TODO

• Investige why the difference (filepath.Walk() read system blocks directly);
• Determined test cases to see who is right;
• Benchmark the slow down.