Remove ruby version check from "bundle exec"?

[nirvdrum]

This is a continuation to #2951. Is there any reason to do a Ruby version check when running "bundle exec" at all? As far as I can tell there's two situations:

• Running a command that does load the Gemfile, such as "bundle exec rails c"
• Running a command that doesn't load the Gemfile at all, such as "bundle exec ruby -v"

I realize I'm stating the obvious there. But in the former case, the Ruby version check will be performed by the subcommand anyway. As of today, it's effectively being run twice. In the latter case, where the Gemfile isn't being loaded, you wouldn't see the error you see today, but does that really matter? Bundler isn't being used for anything other than a command dispatcher in that case.

[indirect]

Bundle exec has to load the bundled environment to know what PATH to use for commands that it’s going to exec. I think the Ruby version check is an incidental part of that, but it shouldn’t be required.

On Mar 29, 2014, at 9:17 AM, Kevin Menard notifications@github.com wrote:

This is a continuation to #2951. Is there any reason to do a Ruby version check when running "bundle exec" at all? As far as I can tell there's two situations:

Running a command that does load the Gemfile, such as "bundle exec rails c"
Running a command that doesn't load the Gemfile at all, such as "bundle exec ruby -v"
I realize I'm stating the obvious there. But in the former case, the Ruby version check will be performed by the subcommand anyway. As of today, it's effectively being run twice. In the latter case, where the Gemfile isn't being loaded, you wouldn't see the error you see today, but does that really matter? Bundler isn't being used for anything other than a command dispatcher in that case.

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[nirvdrum]

Got it. Those are two separate lines. The version check seems to be deliberate. If I remove that, the environment is still loaded. I'll pull together a PR for review.

[segiddins]

Removing that Bundler.definition.validate_ruby! line yields:

  2) bundle platform bundle exec fails when the ruby version doesn't match
     Failure/Error: expect(exitstatus).to eq(18) if opts[:exitstatus]

       expected: 18
            got: 1

       (compared using ==)
     # ./spec/other/platform_spec.rb:209:in `should_be_ruby_version_incorrect'
     # ./spec/other/platform_spec.rb:830:in `block (3 levels) in <top (required)>'

  3) bundle platform bundle exec fails when the engine doesn't match
     Failure/Error: expect(exitstatus).to eq(18) if opts[:exitstatus]

       expected: 18
            got: 1

       (compared using ==)
     # ./spec/other/platform_spec.rb:214:in `should_be_engine_incorrect'
     # ./spec/other/platform_spec.rb:841:in `block (3 levels) in <top (required)>'

  4) bundle platform bundle exec fails when the engine version doesn't match
     Failure/Error: expect(exitstatus).to eq(18) if opts[:exitstatus]

       expected: 18
            got: 1

       (compared using ==)
     # ./spec/other/platform_spec.rb:219:in `should_be_engine_version_incorrect'
     # ./spec/other/platform_spec.rb:853:in `block (4 levels) in <top (required)>'
     # ./spec/support/helpers.rb:327:in `simulate_ruby_engine'
     # ./spec/other/platform_spec.rb:845:in `block (3 levels) in <top (required)>'

  5) bundle platform bundle exec fails when patchlevel doesn't match
     Failure/Error: expect(exitstatus).to eq(18) if opts[:exitstatus]

       expected: 18
            got: 1

       (compared using ==)
     # ./spec/other/platform_spec.rb:224:in `should_be_patchlevel_incorrect'
     # ./spec/other/platform_spec.rb:866:in `block (3 levels) in <top (required)>'

[segiddins]

@indirect are those spec failures OK?