Zsh completion for tmuxinator projects that take a file path as their first argument

.zshrc

# add command and project completion to tmuxinator

# add custom file path completion to your specific “my_project” project
# use this inside a ~/.tmuxinator/my_project.yml via <%= @args[0] %>
# e.g. set the root project path via ```root: <%= @args[0] %>```

#compdef _tmuxinator tmuxinator
_tmuxinator() {
  local commands projects
  commands=(${(f)"$(tmuxinator commands zsh)"})
  projects=(${(f)"$(tmuxinator completions start)"})


  if (( CURRENT == 2 )); then
    _alternative \
      'commands:: _describe -t commands "tmuxinator subcommands" commands' \
      'projects:: _describe -t projects "tmuxinator projects" projects'
  elif (( CURRENT == 3)); then
    case $words[2] in
      copy|cp|c|debug|delete|rm|open|o|start|s|edit|e)
        _arguments '*:projects:($projects)'
      ;;
    esac
  elif (( CURRENT == 4)); then
    case $words[3] in
      my_project)
        _arguments '*:target_dir:_files'
      ;;
    esac
  fi

  return
}

my_project.yml

name: MyProject
root: <%= @args[0] %>


windows:
  - MAIN:
      layout: even-horizontal
      panes:
        -
        -
        -

Based on https://github.com/tmuxinator/tmuxinator/blob/master/completion/tmuxinator.zsh with the file path argument added