Script to copy environment variables from an existing heroku app to another one

heroku_env_copy.sh

#!/bin/bash

# Source: http://blog.nonuby.com/blog/2012/07/05/copying-env-vars-from-one-heroku-app-to-another/

set -e

sourceApp="$1"
targetApp="$2"

while read key value; do
  key=${key%%:}
  echo "Setting $key=$value"
  heroku config:set "$key=$value" --app "$targetApp"
done  < <(heroku config --app "$sourceApp" | sed -e '1d')

FYI much quicker to set them all in one heroku config:set a=b c=d etc

If you prefer a manual review and you do have bash/zsh:

heroku config -s -a source-heroku-app > config.txt

Now review config.txt and remove any unwanted config lines

cat config.txt | tr '\n' ' ' | xargs heroku config:set -a target-heroku-app

https://gist.github.com/nabucosound/8181671#gistcomment-2597319