`bundle exec` without using gems' binaries

[Reto Kaiser]

I'm wondering if there's a way to make `bundle exec <binary>` not use binaries of the gems from the bundle.

Sometimes a gem includes library code and a binary, but I would like to use only the library code (and instead use the binary from my default PATH).

I understand bundler prepends the bundle's "bin/" directory to the PATH in "SharedHelpers#set_bundle_environment". Is there a way to avoid it?

For example: "vagrant-librarian-puppet" is a vagrant plugin gem and includes "puppet" as a library dependency. When it shells out to run the "puppet" command it should use the system's puppet, and not the one from the bundle.

Thanks for any input!

 Reto

[André Arko]

Yes, you should shell out using the `Bundler.with_clean_env` method. For example: `Bundler.with_clean_env { system(“puppet dostuff”) }`.

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[Reto Kaiser]

Perfect, thanks!

I see it's even in the man page…

Reto

[Reto Kaiser]

Hm, it doesn't work well in my case.

1. Let's say the original PATH is "/bin".

2. Then I run `bundle exec rspec`:

 - ENV's PATH is set to "/ruby/gems/bin:/bin".

 - ORIGINAL_ENV's PATH is set to "/bin"

3. The "rspec" binary is executed, bundler is required again:

 - ENV's PATH is set to "/ruby/gems/bin:/bin" (nothing added because of "uniq")

 - ORIGINAL_ENV's PATH is set to "/ruby/gems/bin:/bin"

At that point obviously there's no way to restore the original environment, because it's already overwritten.

Is this a general issue, or something wrong with my setup?

Regards,

 Reto

[Reto Kaiser]

Ok I've opened a ticket about this, with some more details:

https://github.com/bundler/bundler/issues/4251