alt-emacs.sh

#!/bin/bash -e

EMACS=${EMACS:-"open /Applications/Emacs.app -n --args"}

if [ $# != 1 ]; then
    echo "Usage: alt-emacs </path/to/.emacs.d>" 1>&2
    exit 1
fi

if [[ "$1" == */ ]]; then
    emacs_dir="$1"
else
    emacs_dir="$1/"
fi

init_file="${emacs_dir}init.el"

if [ ! -d $emacs_dir ]; then
    echo "No such directory: $emacs_dir" 1>&2
    exit 1
elif [ ! -f "$init_file" ]; then
    echo "No such file: $init_file" 1>&2
    exit 1
fi

init_form="(progn
(setq user-emacs-directory \"${emacs_dir}\")
 (load \"~/${init_file}\")
 (run-hooks 'after-init-hook))"

$EMACS -q --eval "$init_form"