complete

Provides argument autocompletion to shell commands. More information: https://www.gnu.org/software/bash/manual/html_node/Programmable-Completion-Builtins.html.

• Apply a function that performs autocompletion to a command:
  complete -F {{function}} {{command}}
• Apply a command that performs autocompletion to another command:
  complete -C {{autocomplete_command}} {{command}}
• Apply autocompletion without appending a space to the completed word:
  complete -o nospace -F {{function}} {{command}}