generating_operation.sh

$ trailblazer generate operation Thing::Create
class Thing::Create < Trailblazer::Operation
end

$ trailblazer generate operation Thing::Create --steps
class Thing::Create < Trailblazer::Operation
  step     Model( Song, :new )
  step     :assign_current_user!
end

trailblazer_generator.sh

$ trailblazer
Commands:
  trailblazer generate COMMANDS  # Generates trailblazer file
  trailblazer help [COMMAND]     # Describe available commands or one specific command

$ trailblazer help
Commands:
  trailblazer generate COMMANDS  # Generates trailblazer file
  trailblazer help [COMMAND]     # Describe available commands or one specific command

$ trailblazer help generate
Commands:
  trailblazer generate help [COMMAND]  # Describe subcommands or one specific subcommand
  trailblazer generate operation       # Generates trailblazer file

$ trailblazer generate     
Commands:
  trailblazer generate help [COMMAND]  # Describe subcommands or one specific subcommand
  trailblazer generate operation       # Generates trailblazer file

$ trailblazer generate help operation
Usage:
  trailblazer operation NAME

Options:
  [--steps], [--no-steps]  

Description:
  `generate operation` generate operation file

$ trailblazer generate operation     
ERROR: "trailblazer operation" was called with no arguments
Usage: "trailblazer operation NAME"