Allow specifying platform in tldr command line

[pborenstein]

tldr --platform gnu ln

Each platform uses its own version of a tool (BSD vs GNU, for instance), but in some cases the native platform version may be superseded by another version. (Related to #61)

OS X uses BSD ln

os x$ ln -h
usage: ln [-Ffhinsv] source_file [target_file]
       ln [-Ffhinsv] source_file ... target_dir
       link source_file target_file

Linux tends to use GNU ln

gnu$ ln --help
Usage: ln [OPTION]... [-T] TARGET LINK_NAME   (1st form)
  or:  ln [OPTION]... TARGET                  (2nd form)
  or:  ln [OPTION]... TARGET... DIRECTORY     (3rd form)
  or:  ln [OPTION]... -t DIRECTORY TARGET...  (4th form)
In the 1st form, create a link to TARGET with the name LINK_NAME.
In the 2nd form, create a link to TARGET in the current directory.
In the 3rd and 4th forms, create links to each TARGET in DIRECTORY.
... and so on ...

SunOS uses SunOS ln

sunos$ /usr/bin/ln -h
/usr/bin/ln: illegal option -- h
ln: Insufficient arguments (0)
Usage: ln [-f] [-n] [-s] f1 [f2]
       ln [-f] [-n] [-s] f1 ... fn d1
       ln [-f] [-n] -s d1 d2

(Though in some SmartOS images, the ln tool is symlinked to GNU ln)

[rprieto]

Hi,

Pull request #44 actually added support for this: tldr pacman --os=linux
We should update the docs to mention it.

I do like the idea of renaming the "groups" to the tool flavours gnu / bsd as opposed to linux / osx.

[pborenstein]

You could still use os.platform() by changing the semantics of osDirectories. But I'm sure you've thought of that :)

var osDirectories = {
    darwin  : 'bsd',
    linux   : 'gnu',
    sunos   : 'sunos'
};

[rprieto]

@pborenstein what are your thoughts on #61?

[rprieto]

Closing, we should consolidate this discussion in #190