Bash Functions for quickly setting the appropriate user for the git repo

.profile

# GIT USER PROFILE SETTING / SWITCHING
# This will strip the current static User from the current repo and Include an external User profile.
# This function relies on: Git, A Git Repo, a config file located in ~/config/git/profilename.user.config
# Format must be profilename.user.config
# Usage: gituser home => ~/config/git/home.user.config
# Usage: gituser "Work GitHub" => ~/config/git/Work Github.user.config
gituser() { 
  # Sanity check
  if [ -z "$(which git)" ]
  then
    echo "Error: git binary not found" >&2
    return 255
  fi

  # Check if the directory has a git repo
  if [ -z "$(git status)" ]
  then
    echo "Error: Current directory does not contain a git repository (or any of the parent directories): .git" >&2
    return 255
  fi

  # Check for the config file
  if [ ! -e "$HOME/config/git/$1.user.config" ]
  then
    echo "Error: '$1.user.config' not found in: ~/config/git/" >&2
    return 255
  fi

  # Remove current static User Name and Email for the repo
  if [ -n "$(git config --local user.name)" ] || [ -n "$(git config --local user.email)" ]
  then
    username="$(git config --local user.name)"
    useremail="$(git config --local user.email)"
    git config --local --unset-all user
    git config --local --remove-section user
    echo "User's Name: $username has been removed."
    echo "User's Email: $useremail has been removed."
  fi

  # Time to include the user profile!
  git config include.path "~/config/git/$1.user.config"
  echo "User Profile: $1.user.config has been included."

  return 0
}