Remove the requirement of updating the PATH on Mac OS

[pearl-core]

Remove the requirement of updating the PATH on Mac OS

[fsquillace]

Hi Gustavo,

I agree with you on this. Forcing the use to have the GNU coreutils might not be a good idea.

The only reason I forced it is because there are few packages that still requires GNU coreutils anyway. For instance kyrat is an example.

What I can do is following your approach. I can define a bash module like osx-compat.sh which will be sourced from all scripts that have GNU coreutils dependencies. This module will change PATH variable by prepending /usr/local/opt/coreutils/libexec/gnubin path. WDYT?

[fsquillace]

I am not a OSX expert, but I think in order to understand if the script is running on a OSX I could simply check that the path /usr/local/opt/coreutils/libexec/gnubin exists. Do you know an alternative way to do this?

[guhcampos]

I usually do a $(uname -s), this will return "Linux" on Linux boxes and "Darwin" for Mac OS X. I'm not sure for other flavors of BSD and POSIX though.

[fsquillace]

Change completed. Now, the user does not need to change the PATH variable anymore.
The installation process in OSX is greatly simplified: https://github.com/pearl-core/pearl#osx

However, Pearl packages that depends on GNU coreutils might be affected by this change although they will be easily fixed via the osx-compat.{fish,sh} files available: https://github.com/pearl-core/pearl/blob/master/lib/utils/osx-compat.sh

Thanks for catching this. It was a good one.