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Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alexellis2@gmail.com>
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vendor/github.com/spf13/cobra/zsh_completions.md
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## Generating Zsh Completion for your cobra.Command
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Cobra supports native Zsh completion generated from the root `cobra.Command`.
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The generated completion script should be put somewhere in your `$fpath` named
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`_<YOUR COMMAND>`.
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### What's Supported
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* Completion for all non-hidden subcommands using their `.Short` description.
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* Completion for all non-hidden flags using the following rules:
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* Filename completion works by marking the flag with `cmd.MarkFlagFilename...`
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family of commands.
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* The requirement for argument to the flag is decided by the `.NoOptDefVal`
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flag value - if it's empty then completion will expect an argument.
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* Flags of one of the various `*Array` and `*Slice` types supports multiple
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specifications (with or without argument depending on the specific type).
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* Completion of positional arguments using the following rules:
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* Argument position for all options below starts at `1`. If argument position
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`0` is requested it will raise an error.
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* Use `command.MarkZshCompPositionalArgumentFile` to complete filenames. Glob
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patterns (e.g. `"*.log"`) are optional - if not specified it will offer to
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complete all file types.
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* Use `command.MarkZshCompPositionalArgumentWords` to offer specific words for
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completion. At least one word is required.
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* It's possible to specify completion for some arguments and leave some
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unspecified (e.g. offer words for second argument but nothing for first
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argument). This will cause no completion for first argument but words
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completion for second argument.
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* If no argument completion was specified for 1st argument (but optionally was
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specified for 2nd) and the command has `ValidArgs` it will be used as
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completion options for 1st argument.
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* Argument completions only offered for commands with no subcommands.
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### What's not yet Supported
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* Custom completion scripts are not supported yet (We should probably create zsh
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specific one, doesn't make sense to re-use the bash one as the functions will
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be different).
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* Whatever other feature you're looking for and doesn't exist :)
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