A function that executes commitizen's git-cz command or installs it if not present (using npm)

CommitWithCommitizenZsh.function.sh

# Commit using commitizen
commit-with-commitizen() {
  if [[ $(command-exists "git-cz") -eq 0 ]]; then
    npm install --global commitizen
  fi
  git-cz
}

This ZSH function that checks if commitizen is installed globally, install it if not and then uses commitizen to commit.

Optional: Add an alias to always commit using commitizen

Add this alias to your .zshrc

# Commit with commitizen
unalias gc # If you are using the zsh git plugin, you need to unalias the gc alias first
alias gc="commit-with-commitizen"