#!/bin/sh

chdir () {
  cd "$@" >/dev/null
}

BREW_FILE_DIRECTORY=$(chdir "${0%/*}" && pwd -P)
export HOMEBREW_BREW_FILE="$BREW_FILE_DIRECTORY/${0##*/}"

BREW_SYMLINK=$(readlink "$0")
if [ -n "$BREW_SYMLINK" ]
then
    BREW_SYMLINK_DIRECTORY=$(dirname "$BREW_SYMLINK")
    BREW_FILE_DIRECTORY=$(chdir "$BREW_FILE_DIRECTORY" &&
                          chdir "$BREW_SYMLINK_DIRECTORY" && pwd -P)
fi

BREW_LIBRARY_DIRECTORY=$(chdir "$BREW_FILE_DIRECTORY"/../Library && pwd -P)

# Users may have these set, pointing the system Ruby
# at non-system gem paths
unset GEM_HOME
unset GEM_PATH

BREW_SYSTEM=$(uname -s | tr "[:upper:]" "[:lower:]")
if [ "$BREW_SYSTEM" = "darwin" ]
then
    exec "$BREW_LIBRARY_DIRECTORY/brew.rb" "$@"
else
    exec ruby -W0 "$BREW_LIBRARY_DIRECTORY/brew.rb" "$@"
fi