git-deploy

#!/bin/sh

# git-deploy
#
# - Make sure your deployment environments on Heroku are set as Git remotes:
#   git remote add production git@heroku.com:example-production.git
#   git remote add staging git@heroku.com:example-staging.git
#
# - Have branch names matching those environments:
#   git checkout -b production
#   git push origin production
#   git checkout -b staging
#   git push origin staging
#
# - Call git deploy branch_name:
#   It will call "git push branch_name branch_name:master" to deploy your app.

git_deploy() {
  [ $# -lt 1 ] && git_deploy_usage && return 1

  if [ -z "`git branch --list $1`" ]; then
    git_deploy_error "Branch $1 does not exist."
  fi

  git remote show $1 > /dev/null 2>&1
  if [ $? != 0 ]; then
    git_deploy_error "Remote $1 does not exist."
  fi

  git push $1 $1:master
}

git_deploy_usage() {
  echo "usage: git deploy [branch_name]"
  echo
  echo "The branch_name must match the Git remote name for Heroku."
}

git_deploy_error() {
  echo $1 1>&2
  exit 1
}

git_deploy $@