.osx: Add `xcode-select --install`

[mathiasbynens]

From https://twitter.com/peolanha/status/392746116732551169 (@peol):

Need to install Command Line Tools in OSX Mavericks? Simply open the terminal and run xcode-select --install #protip

[hkdobrev]

It is important that you update your XCode after you upgrade to Mavericks and then run this command. Otherwise it is working, but not all command line tools are installed with their latest versions.

[mooremo]

Make sure you open Xcode and accept the EULA too or when you run xcode-select --install the process will appear to hang.

[mathiasbynens]

So, something like open -a Xcode && xcode-select --install?

[kud]

Doing xcode-select --install done that:

Usage: xcode-select -print-path
   or: xcode-select -switch <xcode_folder_path>
   or: xcode-select -version
Arguments:
   -print-path                     Prints the path of the current Xcode folder
   -switch <xcode_folder_path>     Sets the path for the current Xcode folder
   -version                        Prints xcode-select version information

[mathiasbynens]

@kud Seems to work fine here:

$ xcode-select --install
xcode-select: note: install requested for command line developer tools
# <opens window>

Sure you’re on OS X 10.9?

[kud]

I've still got 10.7 though.

[mathiasbynens]

@kud Well that explains it :)

[kud]

I see lots of difference between 10.7 and 10.8/9 about these kind of files. Gotta need to upgrade I think.