Command<T> class abstract

A single command.

A command is known as a "leaf command" if it has no subcommands and is meant to be run. Leaf commands must override run.

A command with subcommands is known as a "branch command" and cannot be run itself. It should call addSubcommand (often from the constructor) to register subcommands.

Constructors

Command()

Properties

aliases → List<String>
Alternate names for this command.
read-only
argParser → ArgParser
The argument parser for this command.
read-only
argResults → ArgResults?
The parsed argument results for this command.
read-only
category → String
The command's category.
read-only
description → String
A description of this command, included in usage.
read-only
globalResults → ArgResults?
The parsed global argument results.
read-only
hashCode → int
The hash code for this object.
read-onlyinherited
hidden → bool
Whether or not this command should be hidden from help listings.
read-only
invocation → String
A single-line template for how to invoke this command (e.g. "pub get package").
read-only
name → String
The name of this command.
read-only
parent → Command<T>?
The command's parent command, if this is a subcommand.
read-only
runner → CommandRunner<T>?
The command runner for this command.
read-only
runtimeType → Type
A representation of the runtime type of the object.
read-onlyinherited
subcommands → Map<String, Command<T>>
An unmodifiable view of all sublevel commands of this command.
read-only
suggestionAliases → List<String>
Alternate non-functional names for this command.
read-only
summary → String
A short description of this command, included in parent's CommandRunner.usage.
read-only
takesArguments → bool
Whether or not this command takes positional arguments in addition to options.
read-only
usage → String
Generates a string displaying usage information for this command.
read-only
usageFooter → String?
An optional footer for usage.
read-only

Methods

addSubcommand(Command<T> command) → void
Adds Command as a subcommand of this.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
printUsage() → void
Prints the usage information for this command.
run() → FutureOr<T>?
Runs this command.
toString() → String
A string representation of this object.
inherited
usageException(String message) → Never
Throws a UsageException with message.

Operators

operator ==(Object other) → bool
The equality operator.
inherited