rbenv — 'find_spec_for_exe': can't find gem bundler (>= 0.a) with executable bundle (Gem::GemNotFoundException)

Question

I'm new to rbenv (was using RVM for long time). Today I do clean uninstall of my RVM and install rbenv. I managed to install Ruby 2.5.1 without any issues.

But when I try to run bundle install for a project today, I got the following error:

'find_spec_for_exe': can't find gem bundler (>= 0.a) with executable bundle (Gem::GemNotFoundException)

Seems like something is broken with my bundler installation but I'm not sure what is wrong. Running gem install bundler with sudo doesn't solve the problem.

Here is the full trace:

$ echo $SHELL
/bin/zsh


$ cat ~/.gemrc
gem: --no-document
install: --no-document
update: --no-document


$ rbenv versions
  system
* 2.5.1 (set by /Users/zulh/.rbenv/version)


$ ruby -v
ruby 2.5.1p57 (2018-03-29 revision 63029) [x86_64-darwin16]


$ which ruby
/Users/zulh/.rbenv/shims/ruby


$ gem env
RubyGems Environment:
  - RUBYGEMS VERSION: 2.7.6
  - RUBY VERSION: 2.5.1 (2018-03-29 patchlevel 57) [x86_64-darwin16]
  - INSTALLATION DIRECTORY: /Users/zulh/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0
  - USER INSTALLATION DIRECTORY: /Users/zulh/.gem/ruby/2.5.0
  - RUBY EXECUTABLE: /Users/zulh/.rbenv/versions/2.5.1/bin/ruby
  - EXECUTABLE DIRECTORY: /Users/zulh/.rbenv/versions/2.5.1/bin
  - SPEC CACHE DIRECTORY: /Users/zulh/.gem/specs
  - SYSTEM CONFIGURATION DIRECTORY: /Users/zulh/.rbenv/versions/2.5.1/etc
  - RUBYGEMS PLATFORMS:
    - ruby
    - x86_64-darwin-16
  - GEM PATHS:
     - /Users/zulh/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0
     - /Users/zulh/.gem/ruby/2.5.0
  - GEM CONFIGURATION:
     - :update_sources => true
     - :verbose => true
     - :backtrace => false
     - :bulk_threshold => 1000
     - "gem" => "--no-document"
     - "install" => "--no-document"
     - "update" => "--no-document"
  - REMOTE SOURCES:
     - https://rubygems.org/
  - SHELL PATH:
     - /Users/zulh/.rbenv/versions/2.5.1/bin
     - /usr/local/Cellar/rbenv/1.1.1/libexec
     - /Users/zulh/.rbenv/shims
     - /usr/local/bin
     - /Users/zulh/go/bin
     - /usr/local/bin
     - /Users/zulh/go/bin
     - /Users/zulh/.rbenv/shims
     - /usr/local/bin
     - /Users/zulh/go/bin
     - /Users/zulh/.rbenv/shims
     - /usr/local/bin
     - /Users/zulh/go/bin
     - /usr/local/bin
     - /usr/bin
     - /bin
     - /usr/sbin
     - /sbin
     - /Library/Frameworks/Mono.framework/Versions/Current/Commands
     - /Applications/Postgres.app/Contents/Versions/latest/bin
     - /Users/zulh/projects/tifig/build/tifig
     - /Applications/Postgres.app/Contents/Versions/latest/bin
     - /Users/zulh/projects/tifig/build/tifig
     - /Applications/Postgres.app/Contents/Versions/latest/bin
     - /Users/zulh/projects/tifig/build/tifig
     - /Applications/Postgres.app/Contents/Versions/latest/bin
     - /Users/zulh/projects/tifig/build/tifig
     - /Applications/Postgres.app/Contents/Versions/latest/bin


$ which bundler
/Users/zulh/.rbenv/shims/bundler


$ bundler --version
Traceback (most recent call last):
    2: from /Users/zulh/.rbenv/versions/2.5.1/bin/bundler:23:in `<main>'
    1: from /Users/zulh/.rbenv/versions/2.5.1/lib/ruby/2.5.0/rubygems.rb:308:in `activate_bin_path'
/Users/zulh/.rbenv/versions/2.5.1/lib/ruby/2.5.0/rubygems.rb:289:in `find_spec_for_exe': can't find gem bundler (>= 0.a) with executable bundler (Gem::GemNotFoundException)


$ cd projects/www.ruby-lang.org


$ bundle install --without production
Traceback (most recent call last):
    2: from /Users/zulh/.rbenv/versions/2.5.1/bin/bundle:23:in `<main>'
    1: from /Users/zulh/.rbenv/versions/2.5.1/lib/ruby/2.5.0/rubygems.rb:308:in `activate_bin_path'
/Users/zulh/.rbenv/versions/2.5.1/lib/ruby/2.5.0/rubygems.rb:289:in `find_spec_for_exe': can't find gem bundler (>= 0.a) with executable bundle (Gem::GemNotFoundException)


$ sudo gem install bundler
Password:
Successfully installed bundler-2.0.1
1 gem installed


$ which bundler
/Users/zulh/.rbenv/shims/bundler


$ bundler --version
Traceback (most recent call last):
    2: from /Users/zulh/.rbenv/versions/2.5.1/bin/bundler:23:in `<main>'
    1: from /Users/zulh/.rbenv/versions/2.5.1/lib/ruby/2.5.0/rubygems.rb:308:in `activate_bin_path'
/Users/zulh/.rbenv/versions/2.5.1/lib/ruby/2.5.0/rubygems.rb:289:in `find_spec_for_exe': can't find gem bundler (>= 0.a) with executable bundler (Gem::GemNotFoundException)


$ bundle install --without production
Traceback (most recent call last):
    2: from /Users/zulh/.rbenv/versions/2.5.1/bin/bundle:23:in `<main>'
    1: from /Users/zulh/.rbenv/versions/2.5.1/lib/ruby/2.5.0/rubygems.rb:308:in `activate_bin_path'
/Users/zulh/.rbenv/versions/2.5.1/lib/ruby/2.5.0/rubygems.rb:289:in `find_spec_for_exe': can't find gem bundler (>= 0.a) with executable bundle (Gem::GemNotFoundException)

How to fix this issue?

Note: I'm using OSX 10.12.6

Answer 1

bundler was updated from 1.7 to 2 on Jan 4. Due to the update, gem install bundler will install version 2 since Jan 4, if you trying to install bundler without specifying a version. And bundler 2.0 requires rubygems version at least 3.0.

First, check your rubygems installed on your local machine, using gem --version. If you use ruby v2.5.1, your rubygems version will be or 2.7.x and under 3.x.

RubyGems Environment:
    - RUBYGEMS VERSION: 2.7.6
    - RUBY VERSION: 2.5.1 (2018-03-29 patchlevel 57) [x86_64-darwin17]

Under rubygems version 3.x, gem install bundler command will not work well.

To fix problem,

1) update rubygems

gem update --system

2) install an older version of bundler

gem install bundler -v 1.17.3

3) install Ruby 2.6. 2.6 was released on last Christmas, Ruby 2.6 merges bundler gem and use rubygems 3.0.1 as default. Since Ruby 2.6, you don't need to install bundler manually.

rbenv install 2.6