diff-heroku-config-vars.sh

#! /bin/bash
set -eu

# Expects two Heroku app names as arguments
# Displays the diff of the environment variable *names* (ignoring their values)

args=("$@")
first_app_var_names=$(heroku config -s --app ${args[0]} | sed -E 's/=.*$//')
second_app_var_names=$(heroku config -s --app ${args[1]} | sed -E 's/=.*$//')

diff -y <(echo "$first_app_var_names" ) <(echo "$second_app_var_names")