Add flag to init for --man and --completions, default to both

[StephenBrown2]

As I use zsh, I don't want rack automatically adding a source to ~/.bashrc (it fails anyways if it's not there), as that won't be used.

--man flag would only generate the man page,
--completions flag would generate the bash completions file,
both would put them in the current directory, or the proper directory (as /usr/share/man/man1/ rack.1 and /etc/bash_completion.d/rack, respectively).

Running without either flag could do what it does now, depending on #146

edit: negative grammar

[lvh]

#374 was a duplicate of this ticket. Some points made that ticket:

• You may want to consider --no-bash-completions or --no-man-page; I I think it's a little weird that rack init --man-page would do less than rack init. @StephenBrown2 suggested:

# rack init
=
# rack init man
# rack init completion

... which seems even better to me :)

Right now, rack tries to add bash completion. If that fails, it gives up and never tries to install the man page. As a fish user; that's unfortunate -- just getting the man page would have given me working completion.

I think the longer-term behavior mentioned on that ticket, where rack tries to do something smart for zsh/fish/... instead of just giving up with the default rack init command, is probably a different ticket, though?

[StephenBrown2]

I'm all for at least giving the possibility of separating out the file generation.

A secondary goal of this issue was so that I could make a PKGBUILD for Arch and put things in the proper places for Arch, which requires some finagling at the moment

1. Move any ~/.bashrc out of the way

2. Run rack init, then moving ~/.bashrc back

3. Move rack.1 (which is generated even though bash_completions isn't) to /usr/share/man/man1/

4. Delete .rack directory

5. Download https://raw.githubusercontent.com/rackspace/rack/master/setup/commandcompletion_bash.sh to /etc/bash_completion.d/rack

6. At this point, I'm not aware that zsh sources the bash completions directory, so I would manually add:

autoload bashcompinit && bashcompinit
source /etc/bash_completion.d/rack

to my ~/.zshrc file