Config bundler locally for path, without and gemfile options

[spajic]

The problem

bundle check always failed for me, cause it worked with different options than bundle install

• it worked with different path
• and different without

After some investigation I succeed to pass relevant options to bundle check, so it passed successfully.
But after that bundle exec failed. Because it relied on options that was set during bundle install!

The solution

I suggest to config relevant options beforehand, so bundle check, bundle install, bundle exec all work in the same context.

[capistrano-bot]

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⚠️	Please update CHANGELOG.md with a description of your changes. If this PR is not a user-facing change (e.g. just refactoring), you can disregard this.

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Here's an example of a CHANGELOG.md entry (place it immediately under the * Your contribution here! line):

* [#97](https://github.com/capistrano/bundler/pull/97): Config bundler locally for path, without and gemfile options - [@spajic](https://github.com/spajic)

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[spajic]

I think this may solve issues #95 and #96

[mattbrictson]

Thanks for the PR! This does solve the problem, but it also involves three extra bundle config commands be executed on every deploy. Doesn't this add a lot of time to the deploy? Or is it still an overall speed improvement in your experience?

[spajic]

Hello, @mattbrictson !
It is still almost 100x win in our experience.

bundle command takes about 25 seconds to fetch metadata

Fetching gem metadata from https://rails-assets.org/...
Fetching version metadata from https://rails-assets.org/..
Fetching gem metadata from https://rails-assets.org/...
Fetching gem metadata from https://rubygems.org/.......
Fetching version metadata from https://rails-assets.org/..
Fetching version metadata from https://rubygems.org/..
Fetching dependency metadata from https://rails-assets.org/..
Fetching dependency metadata from https://rubygems.org/.

We have about 50ms ping to our production servers in GCE.
One bundle config command takes about 100ms
3 more commands add about ~300ms

So our win is 0.3 s vs 25 s

By the way, we already use it in production.
I have made some improvements to this PR.

I will make one more PR with this improvements. UPD: #101

[mattbrictson]

Closing in favor of #122