Command::subcommand_required

subcommand_required

since 0.1.0

If no subcommand is present at runtime, error and exit gracefully.

Example

Spec

TOML

name = "myprog"
subcommand-required = true
[[subcommands]]
name = "test"

YAML

name: myprog
subcommand-required: true
subcommands:
- name: test

JSON

{
  "name": "myprog",
  "subcommand-required": true,
  "subcommands": [
    {
      "name": "test"
    }
  ]
}

Input

myprog

Output

error: 'myprog' requires a subcommand but one was not provided
  [subcommands: test, help]

Usage: myprog <COMMAND>

For more information, try '--help'.