This is a oneline torch7 installation script (including dependencies) for macosx -- Adapted from: https://github.com/clementfarabet/torchinstall/blob/master/install -- It has been tested in parts but not as a whole.

torch_install.sh

#!/usr/bin/env bash

#################################################################################################
# This script installls Torch7 and it's various dependencies.
#
# The script is adapted from:
# https://github.com/clementfarabet/torchinstall/blob/master/install
#
# The above didn't quite work for me on macosx (10.8.2) so the following adjustments were made:
# (1) install gcc 4.7.2 and set as compilers used in Torch build so open OpenMP works
# (2) brew install a previous version of zeromq (2.2) since Torch7 doesn't play well 
#     with the version 3.2 yet
# (3) install xquartz package since X11 is no longer included with macosx >= 10.8
# (4) update luarocks config file so macosx defaults.variables.MAKE="make" not 
#     "gmake" -- This was changed in the luarocks development code (see: 
#     https://github.com/keplerproject/luarocks/commit/73ddf616ba5b9e14979a4ab8f16702d2d502098c)
#     but isn't reflected in the 2.0.12 release (which is the release that 
#     the homebrew formula uses)
#
#
# NOTE: I removed the Linux option since I'm not running any Linux machines right now
#################################################################################################

if [[ `uname` == 'Darwin' ]]; then
  # Install Homebrew (pkg manager):                                                                                   
  if [[ `which brew` == '' ]]; then
    ruby <(curl -fsSkL raw.github.com/mxcl/homebrew/go)
  fi

  # Install git:
  brew install git

  # Install gcc (4.7.2 -- necessary for OpenMP functionality of Torch):
  brew install --enable-gxx --enable-fortran  https://raw.github.com/Homebrew/homebrew-dupes/master/gcc.rb

  # install other dependencies:
  brew install readline cmake wget qt
  brew install libjpeg imagemagick

  # zeromq 3.x doesn't work with Torch yet -- use 2.2 (brew versions zeromq will provide the zeromq 2.2 checkout):
  git checkout 6a2e6ef /usr/local/Library/Formula/zeromq.rb
  brew install zeromq

  # install gnuplot:
  if [[ `which X` == '' ]]; then 
    echo 'downloading X11'
    curl http://xquartz.macosforge.org/downloads/SL/XQuartz-2.7.4.dmg > ~/xquartz.dmg
    echo 'mounting X11 disk image'
    hdiutil ~/xquart.dmg
    echo 'installing xquartz'
    sudo installer -verbose -pkg "/Volumes/XQuartz-2.7.4/XQuartz.pkg" -target /
    hdiutil detach /Volumes/XQuartz-2.7.4
    if [[ `which X` == '' ]]; then
      echo 'error installing xquartz package, aborting...'
      exit
    fi
  fi
  brew install gnuplot

  # install lua and luarocks (lua package manager)
  brew install lua luarocks

  # macosx uses make not gmake like other BSDs
  if [[ $(awk -v w=0 '/if detected.macosx then/, /^\s*end\s*/ {if ($0 ~ /defaults\.variables\.MAKE[ *]=[ *]"make"/) w += 1} 
  END {print w}' /usr/local/Cellar/luarocks/2.0.12/share/lua/5.1/luarocks/cfg.lua) == 0 ]]; then
    sed 's/if[ *]detected\.macosx[ *]then/if detected\.macosx then\
   defaults.variables.MAKE = "make"/' /usr/local/Cellar/luarocks/2.0.12/share/lua/5.1/luarocks/cfg.lua > TEMPcfg.lua
    mv TEMPcfg.lua /usr/local/Cellar/luarocks/2.0.12/share/lua/5.1/luarocks/cfg.lua
  fi
  # Use more recent gcc (>=4.6) to compile Torch, etc.
  export CC=/usr/local/Cellar/gcc/4.7.2/bin/gcc-4.7
  export CXX=/usr/local/Cellar/gcc/4.7.2/bin/g++-4.7

  # Create custom config file for Luarocks                                                                                                            
  mkdir -p ~/.luarocks
  echo "rocks_servers = {"                                          > ~/.luarocks/config.lua
  echo "   [[http://luarocks.org/repositories/rocks]],"            >> ~/.luarocks/config.lua
  echo "   [[http://data.neuflow.org/luarocks]],"                  >> ~/.luarocks/config.lua
  echo "}"                                                         >> ~/.luarocks/config.lua
  echo "rocks_trees = {"                                           >> ~/.luarocks/config.lua
  echo "   home..[[/.luarocks]],"                                  >> ~/.luarocks/config.lua
  echo "   [[/usr/local]]"                                         >> ~/.luarocks/config.lua
  echo "}"                                                         >> ~/.luarocks/config.lua

  # Install Torch7, with LuaJIT support, and extra packages                                                                                           
  luarocks install torch WITH_LUA_JIT=1
  luarocks install penlight
  luarocks install image
  luarocks install parallel
  luarocks install optim
  luarocks install json
else
  # Unsupported
  echo '==> platform not supported, aborting'
  exit
fi