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rclone/vendor/github.com/spf13/cobra/zsh_completions.md
Nick Craig-Wood d61ba7ef78 vendor: update all dependencies
2019-06-27 13:52:32 +01:00

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Generating Zsh Completion for your cobra.Command

Cobra supports native Zsh completion generated from the root cobra.Command.
The generated completion script should be put somewhere in your $fpath named
_<YOUR COMMAND>.

What's Supported

  • Completion for all non-hidden subcommands using their .Short description.
  • Completion for all non-hidden flags using the following rules:
    • Filename completion works by marking the flag with cmd.MarkFlagFilename...
      family of commands.
    • The requirement for argument to the flag is decided by the .NoOptDefVal
      flag value - if it's empty then completion will expect an argument.
    • Flags of one of the various *Array and *Slice types supports multiple
      specifications (with or without argument depending on the specific type).
  • Completion of positional arguments using the following rules:
    • Argument position for all options below starts at 1. If argument position
      0 is requested it will raise an error.
    • Use command.MarkZshCompPositionalArgumentFile to complete filenames. Glob
      patterns (e.g. "*.log") are optional - if not specified it will offer to
      complete all file types.
    • Use command.MarkZshCompPositionalArgumentWords to offer specific words for
      completion. At least one word is required.
    • It's possible to specify completion for some arguments and leave some
      unspecified (e.g. offer words for second argument but nothing for first
      argument). This will cause no completion for first argument but words
      completion for second argument.
    • If no argument completion was specified for 1st argument (but optionally was
      specified for 2nd) and the command has ValidArgs it will be used as
      completion options for 1st argument.
    • Argument completions only offered for commands with no subcommands.

What's not yet Supported

  • Custom completion scripts are not supported yet (We should probably create zsh
    specific one, doesn't make sense to re-use the bash one as the functions will
    be different).
  • Whatever other feature you're looking for and doesn't exist :)