Ensure stylesheet_base generator runs with a clean bundle

[tute]

Static and Stylesheet suspenders' generators add gems to the Gemfile,
but don't run bundle install after the fact, making installations with
clean gem sets fail with errors like:

 gemfile  high_voltage
generate  suspenders:stylesheet_base
Could not find gem 'high_voltage' in any of the gem sources listed in
your Gemfile or available on this machine.
Run `bundle install` to install missing gems.
     run  bundle install
Fetching gem metadata from https://rubygems.org/
Fetching version metadata from https://rubygems.org/
Fetching dependency metadata from https://rubygems.org/
Resolving dependencies...
Using rake 11.2.2

By adding bundle install calls after modifying the Gemfile we ensure
each step will have the necessary dependencies for application code to
run.

[fixes #568]
[fixes #787]

[id4ho]

LGTM

Though if bundle needs to be run after any generate maybe we could overwrite it here like:

def generate(cmd)
  super
  bundle_command "install"
end

[tute]

Thanks for your review. Indeed. Or run on steps that modify the Gemfile.

[tute]

Added a commit which would render one of the bundle installs unnecessary.

[id4ho]

Nice work, looks really good! I'm not familiar with rails generators though, does every instance var get run automatically inside StylesheetBaseGenerator?

[tute]

What instance variables do you mean?

[mike-burns]

LGTM.

[id4ho]

Ah sorry @tute, I meant instance methods (:install_refills, :install_bitters). Was getting late over here last night, I don't know how you do it ;)

I'm gonna assume it's a meta thing.

[tute]

Does every instance method run automatically?

Yes, public methods defined in the class execute when the generator is run.