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This commit adds a command line option to generate completion scripts, as well as updates
clap
to 2.16.0 which adds ZSH completion support.Here's a gif of the new ZSH support and the new
rustup completions
subcommand backing it.Specifically this commit adds
Finally, this PR adds some additional help documentation on the
completions
command, and changes theREADME.md
slightly to reflect the new additions.Some notes about the ZSH script generated by
clap
, it supports, subcommands, flags, args, and options. The options also automatically list theirpossible_values
, and will automatically not list any arguments theyconflict
with. This may not be too applicable torustup
since I don't think many of those options are used, but it's good to note for future reference.Also, positional arguments, such as
toolchain
in a few of the subcommands is changed to uppercase ASCII byclap
in order to differentiate.Edit: removed verbiage about
--completions