Install luajit+luarocks in sandboxed environment

install-ljitrocks.sh

#!/usr/bin/env bash

set -e

die() {
    echo "$1";
    exit 1;
}

# Fetch and install LuaJIT/LuaRocks into the local directory

ROOT=`pwd`
SANDBOX="${ROOT}/sandbox"
TMP_DIR="${ROOT}/sandbox/src"

if [ ! -d "${TMP_DIR}" ]; then mkdir -p "${TMP_DIR}"; fi
pushd "${TMP_DIR}"

rm -fr "luajit-2.0"
git clone http://luajit.org/git/luajit-2.0.git
pushd luajit-2.0

# Fix for an issue compiling LuaJIT with llvm

LLVM_FIX=''

case `uname` in
'Darwin')
    case `gcc --version` in
        *llvm*)
            LLVM_FIX='TARGET_CC="gcc-4.2"'
            ;;
    esac
    ;;
esac

# Patch the LuaJIT install to allow LUA_ROOT to be overridden by variable

git apply << ENDPATCH
diff --git a/Makefile b/Makefile
index c8d3429..5e4f855 100644
--- a/Makefile
+++ b/Makefile
@@ -26,7 +26,7 @@ NODOTABIVER=  51
 # Change the installation path as needed. This automatically adjusts
 # the paths in src/luaconf.h, too. Note: PREFIX must be an absolute path!
 #
-export PREFIX= /usr/local
+export PREFIX= ${SANDBOX}
 ##############################################################################
 
 DPREFIX= \$(DESTDIR)\$(PREFIX)
diff --git a/src/luaconf.h b/src/luaconf.h
index 4a243ff..40fa9c6 100644
--- a/src/luaconf.h
+++ b/src/luaconf.h
@@ -22,7 +22,7 @@
 #define LUA_CPATH_DEFAULT \\
   ".\\\\?.dll;" LUA_CDIR"?.dll;" LUA_CDIR"loadall.dll"
 #else
-#define LUA_ROOT	"/usr/local/"
+#define LUA_ROOT	"${SANDBOX}"
 #define LUA_LDIR	LUA_ROOT "share/lua/5.1/"
 #define LUA_CDIR	LUA_ROOT "lib/lua/5.1/"
 #ifdef LUA_XROOT
ENDPATCH

# Compile and install Lua
echo $LLVM_FIX
make ${LLVM_FIX} clean install
ln -sf ${SANDBOX}/bin/luajit-2.0.0-beta8 ${SANDBOX}/bin/luajit

# Download and install Luarocks
popd

rm -fr "luarocks-2.0.2.tar.gz"
wget http://luarocks.org/releases/luarocks-2.0.2.tar.gz;
if [ -d "luarocks-2.0.2" ]; then rm -fr luarocks-2.0.2; fi
tar -zxf "luarocks-2.0.2.tar.gz"
pushd luarocks-2.0.2
./configure --with-lua="${SANDBOX}" --prefix="${SANDBOX}" --lua-suffix="jit" --with-lua-include="${SANDBOX}/include/luajit-2.0" --force-config 
make && make install && make clean

popd # Back to tmp
popd # Back to the original directory