Add shell completion scripts

[paulo-ferraz-oliveira]

... and maybe when that's done update the Homebrew formula.

[paulo-ferraz-oliveira]

I vote for, at least, Bash and Zsh.

[elbrujohalcon]

Yeah, great idea.

[paulo-ferraz-oliveira]

I just need to make a full tree of them, now, since this should not be that difficult to achieve (kerl has them, these days, and so does rebar3, so we have examples aplenty).

[paulo-ferraz-oliveira]

Here's what I have atm:

command	description
--help (-h)	Show help information
--config <file> (-c <file>)	Provide path to a non-default configuration file
--commands	Show available commands
git-branch <branch|commit>	Execute on files changed since <branch> or <commit>
git-hook	Execute on the pre-commit hook Git-staged files
install git-hook	Install as a Git pre-commit hook
rock [<file>...]	Execute on identified files
--output_format <plain|colors|parsable>	Control the output format
--parallel <auto|n> (-P <auto|n>)	Analyze files concurrently
--quiet (-q)	Suppress all output
--verbose (-V)	Enable verbose output
--version (-v)	Show the current version
--code_path <dir> (-p <dir>)	Add <dir> to analysis code path
--keep_rocking (-k)	Don't stop on errors

[elbrujohalcon]

Yeah… you can simply elvis --help, right?

elvis @ master % _build/default/bin/elvis --help
Usage: elvis [-h] [-c <config>] [--commands]
             [--output-format <output_format>] [-P <parallel>] [-q] [-V]
             [-v] [-p <code_path>] [-k]

  -h, --help          Show this help information.
  -c, --config        Provide the path to the configuration file. When
                      none is provided elvis checks if there's an
                      elvis.config file.
  --commands          Show available commands.
  --output-format     It allows you to display the results in plain text.
                      When none is provided elvis displays the results in
                      colors. The options allowed are (plain | colors |
                      parsable).
  -P, --parallel      Allows to analyze files concurrently. Provide max
                      number of concurrent workers, or specify "auto" to
                      peek default value based on the number of schedulers.
  -q, --quiet         Suppress all output.
  -V, --verbose       Enable verbose output.
  -v, --version       Output the current elvis version.
  -p, --code-path     Add the directory in the code path.
  -k, --keep-rocking  Won't stop rocking on first error when given a list
                      of files

[paulo-ferraz-oliveira]

Yeah, but:

1. I don't wanna trust the README
2. I don't wanna trust --help
3. I wanna trust the code

And, as you can see, --help doesn't mention any of the commands. 😄 At the same time it doesn't show where stuff like <config> is actually used.

[paulo-ferraz-oliveira]

... and it's now in Homebrew already. 🎉