Switch between different Heroku accounts with Bash functions

heroku_accounts.sh

# Set heroku account credentials where each account file is named ~/.heroku/credentials_XXX
#   http://www.mail-archive.com/heroku@googlegroups.com/msg03850.html
function hset() {
  ln -s ~/.heroku/credentials_$1 ~/.heroku/credentials
}

# Clear current Heroku account
function hclear() {
  [ -L ~/.heroku/credentials ] && rm ~/.heroku/credentials
}

# List all Heroku accounts
function hlist() {
  ls ~/.heroku/credentials_* | sed s:^.*/.heroku/credentials_::
}