R6 Class to prepare command parameters.

Command is an R6 class used by developers to create new command. It should not be used by end users.

See also

make_command

Methods

Public methods

• Command$new()

• Command$build_command()

• Command$get_on_start()

• Command$get_on_exit()

• Command$get_on_fail()

• Command$get_on_succeed()

• Command$print()

• Command$clone()

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Method new()

Create a new Command object.

Usage

Command$new(...)

Arguments

...

Additional argument passed into command.

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Method build_command()

Build the command line

Usage

Command$build_command(help = FALSE, verbose = TRUE)

Arguments

help

A boolean value indicating whether to build parameters for help document or not.

verbose

A boolean value indicating whether the command execution should be verbose.

envir

An environment used to Execute command.

Returns

An atomic character combine the command and parameters.

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Method get_on_start()

Get the command startup code

Usage

Command$get_on_start()

Returns

A list of quosures.

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Method get_on_exit()

Get the command exit code

Usage

Command$get_on_exit()

Returns

A list of quosures.

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Method get_on_fail()

Get the command failure code

Usage

Command$get_on_fail()

Returns

A list of quosures.

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Method get_on_succeed()

Get the command succeessful code

Usage

Command$get_on_succeed()

Returns

A list of quosures.

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Method print()

Build parameters to run command.

Usage

Command$print(indent = NULL)

Arguments

indent

A single integer number giving the space of indent.

Returns

The object itself.

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Method clone()

The objects of this class are cloneable with this method.

Usage

Command$clone(deep = FALSE)

Arguments

deep

Whether to make a deep clone.