LoaderCLI

class lsst.daf.butler.cli.butler.LoaderCLI(*args, **kwargs)

Bases: click.core.MultiCommand, abc.ABC

Extends click.MultiCommand, which dispatches to subcommands, to load subcommands at runtime.

Attributes Summary

allow_extra_args
allow_interspersed_args
ignore_unknown_options
localCmdPkg localCmdPkg identifies the location of the commands that are in this package.

Methods Summary

__call__(*args, **kwargs) Alias for main().
collect_usage_pieces(ctx) Returns all the pieces that go into the usage line and returns it as a list of strings.
format_commands(ctx, formatter) Extra format methods for multi methods that adds all the commands after the options.
format_epilog(ctx, formatter) Writes the epilog into the formatter if it exists.
format_help(ctx, formatter) Writes the help into the formatter if it exists.
format_help_text(ctx, formatter) Writes the help text to the formatter if it exists.
format_options(ctx, formatter) Writes all the options into the formatter if they exist.
format_usage(ctx, formatter) Writes the usage line into the formatter.
getLocalCommands() Get the commands offered by the local package.
getPluginList() Get the list of importable yaml files that contain cli data for this command.
get_command(ctx, name) Used by Click to get a single command for execution.
get_help(ctx) Formats the help into a string and returns it.
get_help_option(ctx) Returns the help option object.
get_help_option_names(ctx) Returns the names for the help option.
get_params(ctx)
get_short_help_str([limit]) Gets short help for the command or makes it by shortening the long help string.
get_usage(ctx) Formats the usage line into a string and returns it.
invoke(ctx) Given a context, this invokes the attached callback (if it exists) in the right way.
list_commands(ctx) Used by Click to get all the commands that can be called by the butler command, it is used to generate the –help output.
main([args, prog_name, complete_var, …]) This is the way to invoke a script with all the bells and whistles as a command line application.
make_context(info_name, args[, parent]) This function when given an info name and arguments will kick off the parsing and create a new Context.
make_parser(ctx) Creates the underlying option parser for this command.
parse_args(ctx, args) Given a context and a list of arguments this creates the parser and parses the arguments, then modifies the context as necessary.
resolve_command(ctx, args)
resultcallback([replace]) Adds a result callback to the chain command.

Attributes Documentation

allow_extra_args = True
allow_interspersed_args = False
ignore_unknown_options = False
localCmdPkg

localCmdPkg identifies the location of the commands that are in this package. getLocalCommands assumes that the commands can be found in localCmdPkg.__all__, if this is not the case then getLocalCommands should be overridden.

Returns:
package : str

The fully qualified location of this package.

Methods Documentation

__call__(*args, **kwargs)

Alias for main().

collect_usage_pieces(ctx)

Returns all the pieces that go into the usage line and returns it as a list of strings.

format_commands(ctx, formatter)

Extra format methods for multi methods that adds all the commands after the options.

format_epilog(ctx, formatter)

Writes the epilog into the formatter if it exists.

format_help(ctx, formatter)

Writes the help into the formatter if it exists.

This is a low-level method called by get_help().

This calls the following methods:

format_help_text(ctx, formatter)

Writes the help text to the formatter if it exists.

format_options(ctx, formatter)

Writes all the options into the formatter if they exist.

format_usage(ctx, formatter)

Writes the usage line into the formatter.

This is a low-level method called by get_usage().

getLocalCommands() → collections.defaultdict[str, list]

Get the commands offered by the local package. This assumes that the commands can be found in localCmdPkg.__all__, if this is not the case then this function should be overridden.

Returns:
commands : defaultdict [str, list [str]]

The key is the command name. The value is a list of package(s) that contains the command.
classmethod getPluginList() → list

Get the list of importable yaml files that contain cli data for this command.

Returns:
list [str]

The list of files that contain yaml data about a cli plugin.
get_command(ctx: click.core.Context, name: str) → click.core.Command | None[click.core.Command, None]

Used by Click to get a single command for execution.

Parameters:
ctx : click.Context

The current Click context.

name : str

The name of the command to return.
Returns:
command : click.Command

A Command that wraps a callable command function.
get_help(ctx)

Formats the help into a string and returns it.

Calls format_help() internally.

get_help_option(ctx)

Returns the help option object.

get_help_option_names(ctx)

Returns the names for the help option.

get_params(ctx)
get_short_help_str(limit=45)

Gets short help for the command or makes it by shortening the long help string.

get_usage(ctx)

Formats the usage line into a string and returns it.

Calls format_usage() internally.

invoke(ctx)

Given a context, this invokes the attached callback (if it exists) in the right way.

list_commands(ctx: click.core.Context) → list

Used by Click to get all the commands that can be called by the butler command, it is used to generate the –help output.

Parameters:
ctx : click.Context

The current Click context.
Returns:
commands : list [str]

The names of the commands that can be called by the butler command.
main(args=None, prog_name=None, complete_var=None, standalone_mode=True, **extra)

This is the way to invoke a script with all the bells and whistles as a command line application. This will always terminate the application after a call. If this is not wanted, SystemExit needs to be caught.

This method is also available by directly calling the instance of a Command.

New in version 3.0: Added the standalone_mode flag to control the standalone mode.

Parameters:
  • args – the arguments that should be used for parsing. If not provided, sys.argv[1:] is used.
  • prog_name – the program name that should be used. By default the program name is constructed by taking the file name from sys.argv[0].
  • complete_var – the environment variable that controls the bash completion support. The default is "_<prog_name>_COMPLETE" with prog_name in uppercase.
  • standalone_mode – the default behavior is to invoke the script in standalone mode. Click will then handle exceptions and convert them into error messages and the function will never return but shut down the interpreter. If this is set to False they will be propagated to the caller and the return value of this function is the return value of invoke().
  • extra – extra keyword arguments are forwarded to the context constructor. See Context for more information.
make_context(info_name, args, parent=None, **extra)

This function when given an info name and arguments will kick off the parsing and create a new Context. It does not invoke the actual command callback though.

Parameters:
  • info_name – the info name for this invokation. Generally this is the most descriptive name for the script or command. For the toplevel script it’s usually the name of the script, for commands below it it’s the name of the script.
  • args – the arguments to parse as list of strings.
  • parent – the parent context if available.
  • extra – extra keyword arguments forwarded to the context constructor.
make_parser(ctx)

Creates the underlying option parser for this command.

parse_args(ctx, args)

Given a context and a list of arguments this creates the parser and parses the arguments, then modifies the context as necessary. This is automatically invoked by make_context().

resolve_command(ctx, args)
resultcallback(replace=False)

Adds a result callback to the chain command. By default if a result callback is already registered this will chain them but this can be disabled with the replace parameter. The result callback is invoked with the return value of the subcommand (or the list of return values from all subcommands if chaining is enabled) as well as the parameters as they would be passed to the main callback.

Example:

@click.group()
@click.option('-i', '--input', default=23)
def cli(input):
    return 42

@cli.resultcallback()
def process_result(result, input):
    return result + input

New in version 3.0.

Parameters:replace – if set to True an already existing result callback will be removed.