Added 'rglob' function to stdlib.

[vitorarins]

[codecov-io]

Codecov Report

Merging #242 into master will decrease coverage by 0.01%. The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #242      +/-   ##
==========================================
- Coverage   56.96%   56.94%   -0.02%     
==========================================
  Files          26       25       -1     
  Lines        4403     4401       -2     
==========================================
- Hits         2508     2506       -2     
  Misses       1653     1653              
  Partials      242      242

Impacted Files	Coverage Δ
internal/sh/util.go	75% <0%> (-4.55%)	:arrow_down:
internal/sh/rfork.go

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[i4ki]

@vitorarins https://github.com/DoctorWkt/unix-jun72/blob/master/src/cmd/glob.c

Version 1 of unix had a program called glob, very useful =) Maybe we create a tool like that in stdbin to be used in conjunction with our rglob function.

[katcipis]

@tiago4orion the idea is to remove the builtin glob function then ?

[vitorarins]

Maybe we create a tool like that in stdbin...

Awesome!

@katcipis @tiago4orion What do you think about creating a new glob that is capable of accepting the two asterisks (**) syntax?

[i4ki]

@katcipis I don't think so. I prefer a builtin function that handles ** also, or a function in stdlib.. I sent the link to the unix glob because maybe we can create a helper binary to help the rglob nash function. But maybe this doesn't make sense.

[katcipis]

@tiago4orion If the builtin function will continue to exist I see very little incentive to have a helper binary...not sure in what will exactly it help if we give support on the glob function.