Getting a bundler/setup (LoadError)

[chrisnicola]

This is what I'm seeing when deploying. I'm using Rails 5.0.0.1.

I'm suspecting it may have something to do with the binstubs, but they are the default ones. Nothing special there.

-----> Rake app detected
/tmp/{redacted}/vendor/ruby-2.3.1/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require': cannot load such file -- bundler/setup (LoadError)
    from /tmp/{redacted}/vendor/ruby-2.3.1/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    from /tmp/{redacted}/config/boot.rb:6:in `<top (required)>'
    from bin/rake:2:in `require_relative'
    from bin/rake:2:in `<main>'
 !     Push rejected, failed to compile Rake app.
 !     Push failed

[petrgazarov]

Same, using rails 4.2.7.

Actually, my output is somewhat different (may not be same issue):

-----> Rake app detected
/app/tmp/buildpacks/c72957e2a3a6a40281e4b97afc23d1ba0aaf219f9456d09b2ff23741cb89ea2026349b2adfda30a146b4b2adb05024ad79c04c5ae4975333b55ce131f8dd47c2/bin/compile: line 30: rake: command not found
 !     Push rejected, failed to compile Rake app.
 !     Push failed

[psyho]

Did you remember to set the "base" buildpack? What does the heroku buildpacks command print for your app?

[petrgazarov]

@psyho Yeah, I've got the standard ruby pack first, then I also have a phantomjs pack:

$ heroku buildpacks
=> 1. https://github.com/heroku/heroku-buildpack-ruby.git
2. https://github.com/gunpowderlabs/buildpack-ruby-rake-deploy-tasks.git
3. https://github.com/stomita/heroku-buildpack-phantomjs

[psyho]

@petrgazarov does your Gemfile include a line for rake?

[petrgazarov]

So what's interesting is that, when it first installs the ruby buildpack (since it's first in order), script works fine: bundler is installed, and rake is available. So gems in Gemfile are installed without a problem (there is no line for rake in Gemfile, but I think it's part of the standard ruby buildpack).

When this buildpack is installed next, neither rake nor bundler are installed. When I patch this script to include gem install bundler, it complains that it's a read-only system.

[acarpe]

I solved this same error in this way
febeling/webpack-rails-buildpack#5
you can probably do the same for this buildpack