Two default versions of rake installed - how to delete one

[Constantin07]

Hello,

I cannot get rid of one of rake versions on my Ubuntu 16.04.3 LTS box

This issue is related to:

• Installing a library

Here are my current environment details:

$ gem env version
2.6.14

# ./gem list rake

*** LOCAL GEMS ***

rake (default: 12.1.0, default: 10.4.2)

/gem list rake -d

*** LOCAL GEMS ***

rake (12.1.0, 10.4.2)
    Authors: Hiroshi SHIBATA, Eric Hodel, Jim Weirich
    Homepage: https://github.com/ruby/rake
    License: MIT
    Installed at (12.1.0, default): /opt/****/ruby/gems/2.2.0
                 (10.4.2, default): /opt/****/ruby/gems/2.2.0

./gem uninstall rake -v 12.1.0
ERROR:  While executing gem ... (Gem::InstallError)
    gem "rake" cannot be uninstalled because it is a default gem

How does it come that it allows 2 default rake versions ?
Please advice how to delete one of them so just to leave one ...

[colby-swandale]

What's the output of gem env?

[Constantin07]

# ./gem env
RubyGems Environment:
  - RUBYGEMS VERSION: 2.6.14
  - RUBY VERSION: 2.2.8 (2017-09-14 patchlevel 477) [x86_64-linux]
  - INSTALLATION DIRECTORY: /opt/****/embedded/lib/ruby/gems/2.2.0
  - USER INSTALLATION DIRECTORY: /root/.gem/ruby/2.2.0
  - RUBY EXECUTABLE: /opt/****/embedded/bin/ruby
  - EXECUTABLE DIRECTORY: /opt/****/embedded/bin
  - SPEC CACHE DIRECTORY: /root/.gem/specs
  - SYSTEM CONFIGURATION DIRECTORY: /opt/****/embedded/etc
  - RUBYGEMS PLATFORMS:
    - ruby
    - x86_64-linux
  - GEM PATHS:
     - /opt/****/embedded/lib/ruby/gems/2.2.0
     - /root/.gem/ruby/2.2.0
  - GEM CONFIGURATION:
     - :update_sources => true
     - :verbose => true
     - :backtrace => false
     - :bulk_threshold => 1000
  - REMOTE SOURCES:
     - https://rubygems.org/
  - SHELL PATH:
     - /usr/local/sbin
     - /usr/local/bin
     - /usr/sbin
     - /usr/bin
     - /sbin
     - /bin
     - /snap/bin

[segiddins]

My guess is that there's actually only one default rake installed, but 2 gemspecs. What's the output of ls /opt/****/embedded/lib/ruby/gems/2.2.0/specifications/default ?

[znz]

When install ruby with new default gems to same path without uninstalling old ruby, it may cause duplicated default gems.
ref https://bugs.ruby-lang.org/issues/12764

But ruby 2.2.x bundles rake 10.4.2 only.
I wonder where rake 12.1.0 from.

[Constantin07]

@segiddins here is output:

bigdecimal-1.2.6.gemspec
io-console-0.4.3.gemspec
json-1.8.1.1.gemspec
psych-2.0.8.1.gemspec
rake-10.4.2.gemspec
rake-12.1.0.gemspec
rdoc-4.2.0.gemspec

[hsbt]

If you invoke gem install rake --default, rubygems do install rake-12.1.0 as default gems.

You can remove it manually like rm /opt/****/embedded/lib/ruby/gems/2.2.0/specifications/default/rake-12.1.0.gemspec

[colby-swandale]

ping @Constantin07

[Constantin07]

@hsbt Thanks a lot!
Running below solved the problem.

rm /opt/****/embedded/lib/ruby/gems/2.2.0/specifications/default/rake-12.1.0.gemspec

./gem list rake

*** LOCAL GEMS ***

rake (default: 12.1.0)

[rquant]

Thanks this was very helpful. I had a similar issue trying to update bundler gem from 2.1.4 to 2.3.9.

Running gem info bundler I can see there are multiple defaults.

 gem info bundler

*** LOCAL GEMS ***

bundler (2.3.9, 2.1.4)
    Authors: André Arko, Samuel Giddins, Colby Swandale, Hiroshi
    Shibata, David Rodríguez, Grey Baker, Stephanie Morillo, Chris
    Morris, James Wen, Tim Moore, André Medeiros, Jessica Lynn Suttles,
    Terence Lee, Carl Lerche, Yehuda Katz
    Homepage: https://bundler.io
    License: MIT
    Installed at (2.3.9, default): /Users/ryan.quant/.rbenv/versions/2.7.4/lib/ruby/gems/2.7.0
                 (2.1.4, default): /Users/ryan.quant/.rbenv/versions/2.7.4/lib/ruby/gems/2.7.0

    The best way to manage your application's dependencies

The above solution worked for me, but required one additional step (I use rbenv as my ruby manager):

rm /Users/ryan.quant/.rbenv/versions/2.7.4/lib/ruby/gems/2.7.0/specifications/default/bundler-2.1.4.gemspec

gem install bundler:2.3.9

I had to reinstall new version after removing the gemspec for the outdated version.