Add wrapper shell script for brew.

[MikeMcQuaid]

To allow easier configuration for non-OSX platforms.

References #16344.

[adamv]

Need to dereference the brew symlink before looking for a relative Library folder.

[jacknagel]

"$@" instead of $*

[MikeMcQuaid]

Updated.

[MikeMcQuaid]

Updated again to resolve (one) symlink. Think we should do either do the brew-$(uname) stuff or remove the shebang. Both seems kinda pointless. I guess from what @sjackman has said so far the latter might be more use.

[MikeMcQuaid]

Let me know how this looks now when you get a chance. Thanks.

[sjackman]

On OS X we want to use a particular Ruby interpreter. On other systems we want to use the Ruby interpreter found in the path. I suggest the following.

if [ "$BREW_SYSTEM" = "darwin" ]
then
    exec "$BREW_DIRECTORY/brew.rb" "$@"
else
    exec ruby -W0 "$BREW_DIRECTORY/brew.rb" "$@"
fi

Cheers,
Shaun

[MikeMcQuaid]

@sjackman Do you see a use in having your own brew-linux script which could do setup/checks for various things and avoid patches?

[sjackman]

@MikeMcQuaid Not immediately, unless we go the monkey patch route, but I'm not convinced that's the best solution.

[MikeMcQuaid]

I think some monkey patching would be a good idea but I'll try and get some of the stuff merged from your other pull where it makes sense.

[MikeMcQuaid]

Updated. Split into two commits so Git's rename detection behaves properly and used @sjackman's changes.

[jacknagel]

Haven't tested it but the approach looks fine.

[MikeMcQuaid]

@Sharpie @mistydemeo @mxcl Thoughts?

[mxcl]

Approved.

FFR: making brew work on Linux is worth it IMO.

Though making the formula in Library/Formula a tap will be a prerequisite for it working well on Linux.

[MikeMcQuaid]

Pushed this. It may well destroy the universe so I'll watch out for that.