Git Config Switcher for Multiple GitHub Accounts

Save this in your .zshrc file to automatically switch between different GitHub accounts based on your project directory.

# Function to check current git configuration
# Returns the current git user.name and user.email
function check-git-config() {
  local name=$(git config user.name)
  local email=$(git config user.email)
  echo "Current git config:"
  echo "  user.name:  $name"
  echo "  user.email: $email"
  # Return values for reuse
  echo "$name:$email"
}

# Function to switch to personal GitHub account
# Updates git config and GitHub CLI authentication
function set-git-personal() {
  local target_name="YOUR_NAME"              # Replace with your name
  local target_email="YOUR_PERSONAL_EMAIL"   # Replace with your personal email
  
  # Switch to personal GitHub account
  gh auth switch --user YOUR_PERSONAL_GH_USERNAME  # Replace with your GitHub username
  
  # Set git config
  local config_output=$(check-git-config)
  local current_config=(${(s/:/)config_output[-1]})
  local current_name=$current_config[1]
  local current_email=$current_config[2]

  if [[ "$current_name" != "$target_name" ]] || [[ "$current_email" != "$target_email" ]]; then
    git config user.name "$target_name"
    git config user.email "$target_email"
    echo "Git config updated: user.name='$target_name', user.email='$target_email'"
  fi
}

# Function to switch to work GitHub account
# Updates git config and GitHub CLI authentication
function set-git-work() {
  local target_name="YOUR_NAME"           # Replace with your name
  local target_email="YOUR_WORK_EMAIL"    # Replace with your work email
  
  # Switch to work GitHub account
  gh auth switch --user YOUR_WORK_GH_USERNAME  # Replace with your work GitHub username
  
  # Set git config
  local config_output=$(check-git-config)
  local current_config=(${(s/:/)config_output[-1]})
  local current_name=$current_config[1]
  local current_email=$current_config[2]

  if [[ "$current_name" != "$target_name" ]] || [[ "$current_email" != "$target_email" ]]; then
    git config user.name "$target_name"
    git config user.email "$target_email"
    echo "Git config updated: user.name='$target_name', user.email='$target_email'"
  fi
}

# Auto-switching function that runs when changing directories
# Automatically switches git config based on project directory
function chpwd() {
  local current_dir="$PWD"
  if [[ -d ".git" ]]; then
    if [[ "$current_dir" == "$HOME/path/to/work/projects"* ]]; then  # Replace with your work projects path
      set-git-work
    else
      set-git-personal
    fi
  fi
}

Setup Instructions

1. Copy paste the excerpt to your .zshrc file and replace values.

2. Replace the placeholder values:

   • YOUR_NAME: Your full name
   • YOUR_PERSONAL_EMAIL: Your personal GitHub email
   • YOUR_WORK_EMAIL: Your work GitHub email
   • YOUR_PERSONAL_GH_USERNAME: Your personal GitHub username
   • YOUR_WORK_GH_USERNAME: Your work GitHub username
   • $HOME/path/to/work/projects: Path to your work projects directory

3. Save the modified code in your .zshrc file

4. Reload your shell: source ~/.zshrc

Features

• Automatically switches between work and personal GitHub accounts when changing directories
• Updates both git config and GitHub CLI authentication
• Shows current git configuration when changes are made
• Only runs in git repositories
• Prevents unnecessary config updates when values are already correct

Requirements

• Zsh shell
• GitHub CLI (gh) installed and configured with multiple accounts
• Git installed