Add original error context info to GemRequireError message

[RochesterinNYC]

Addresses #4182.

[RochesterinNYC]

Hm, actually, @indirect, any tips on a quick way to reproduce the error condition without requiring something running stuff in a Docker container or uninstalling my node environment? I'd like to check the formatting and see if it's clean looking.

[segiddins]

Backtrace should be joined rather than inspected.

[segiddins]

Build a gem that just raises in the file bundler will attempt to require?

[RochesterinNYC]

Got y'all. Updated the PR with a change to the appropriate spec and updated the formatting.
The output will now look like:

/path/bundler/lib/bundler/runtime.rb:80:in `rescue in block (2 levels) in require': There was an error while trying to load the gem 'faulty'. (Bundler::GemRequireError)
Gem Load Error is: Gem Internal Error Message
Backtrace for gem load error is:
/path/bundler/tmp/libs/faulty-1.0.0/lib/faulty.rb:1:in `<top (required)>'
/path/bundler/lib/bundler/runtime.rb:77:in `require'
/path/bundler/lib/bundler/runtime.rb:77:in `block (2 levels) in require'
/path/bundler/lib/bundler/runtime.rb:72:in `each'
/path/bundler/lib/bundler/runtime.rb:72:in `block in require'
/path/bundler/lib/bundler/runtime.rb:61:in `each'
/path/bundler/lib/bundler/runtime.rb:61:in `require'
/path/bundler/lib/bundler.rb:100:in `require'
-e:2:in `<main>'
Bundler Error Backtrace:
  from /path/bundler/lib/bundler/runtime.rb:76:in `block (2 levels) in require'
  from /path/bundler/lib/bundler/runtime.rb:72:in `each'
  from /path/bundler/lib/bundler/runtime.rb:72:in `block in require'
  from /path/bundler/lib/bundler/runtime.rb:61:in `each'
  from /path/bundler/lib/bundler/runtime.rb:61:in `require'
  from /path/bundler/lib/bundler.rb:100:in `require'
  from -e:2:in `<main>'

The backtrace for the gem load error would, for the coffee-rails example that the original issue #4182 brought up, be all stuff in the internals of the coffee-rails gem presumably. It's only still bundler-related code/files in backtrace for this example output because this is copied from the test suite.

[segiddins]

👍🏻

[indirect]

@homu r+

[homu]

📌 Commit 85d6cea has been approved by indirect

[homu]

⌛ Testing commit 85d6cea with merge ba0bac9...

[homu]

☀️ Test successful - status

[emirkin]

@RochesterinNYC what is the simplest way to pick up this fix considering that the new version of Bundler won't be released for a while?

[RochesterinNYC]

@emirkin a new release of v1.12.0 will be made very soon.

If you really don't want to wait for it, though, you can install v1.12.0.pre.2 via gem install bundler --pre

[emirkin]

@RochesterinNYC Thanks!