$ comtrya gen-completions --help
Auto generate completions

for examples:
 - bash: ```source <(comtrya gen-completions bash)```
 - fish: ```comtrya gen-completions fish | source```

Usage: comtrya gen-completions <SHELL>

Arguments:
  <SHELL>
          If provided, outputs the completion file for given shell

          [possible values: bash, elvish, fish, powershell, zsh]

Options:
  -h, --help
          Print help (see a summary with '-h')