#!/bin/bash

set -eux

build=${EMACS_BUILD:-.}

# Retrieve installation directory.  Many ways to do this; parsing
# 'config.status --config' might be TRT in principle; for simplicity,
# just:
prefix=$(sed -n s/'^prefix *= *'//p "${build}"/Makefile)

cd "${build}"
make install

[[ ${prefix} =~ ~/apps/(.*) ]] || exit
target=${BASH_REMATCH[1]}

cd ~/apps
ln -fsvT "${target}" emacs