Rails: I installed Ruby, now "bundle install" doesn't work - ruby

Question

I’m using Rails 4.2.7. I downloaded an example that evidently requires me to use Ruby 2.1.6 rather than the Ruby 2.3.0 version I had installed …
localhost:lti_tool_provider_example-master davea$ bundle install
Your Ruby version is 2.3.0, but your Gemfile specified 2.1.6
So that’s what I did. However after installing Ruby 2.1.6, now “bundle install” doesn’t work …
localhost:lti_tool_provider_example-master davea$ rvm install ruby-2.1.6
Warning! PATH is not properly set up, '/Users/davea/.rvm/gems/ruby-2.3.0/bin' is not at first place,
usually this is caused by shell initialization files - check them for 'PATH=...' entries,
it might also help to re-add RVM to your dotfiles: 'rvm get stable --auto-dotfiles',
to fix temporarily in this shell session run: 'rvm use ruby-2.3.0'.
Warning, new version of rvm available '1.27.0', you are using older version '1.26.11'.
You can disable this warning with: echo rvm_autoupdate_flag=0 >> ~/.rvmrc
You can enable auto-update with: echo rvm_autoupdate_flag=2 >> ~/.rvmrc
Searching for binary rubies, this might take some time.
Found remote file https://rubies.travis-ci.org/osx/10.12/x86_64/ruby-2.1.6.tar.bz2
Checking requirements for osx.
Certificates in '/usr/local/etc/openssl/cert.pem' are already up to date.
Requirements installation successful.
ruby-2.1.6 - #configure
ruby-2.1.6 - #download
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0
100 7630k 100 7630k 0 0 1199k 0 0:00:06 0:00:06 --:--:-- 1551k
No checksum for downloaded archive, recording checksum in user configuration.
ruby-2.1.6 - #validate archive
ruby-2.1.6 - #extract
ruby-2.1.6 - #validate binary
Libraries missing for ruby-2.1.6: cannot. Refer to your system manual for installing libraries
Mounting remote ruby failed with status 10, trying to compile.
Checking requirements for osx.
Certificates in '/usr/local/etc/openssl/cert.pem' are already up to date.
Requirements installation successful.
Warning: DYLD_LIBRARY_PATH environment variable is set, this might interact with the compilation and ruby.
Installing Ruby from source to: /Users/davea/.rvm/rubies/ruby-2.1.6, this may take a while depending on your cpu(s)...
ruby-2.1.6 - #downloading ruby-2.1.6, this may take a while depending on your connection...
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 11.4M 100 11.4M 0 0 2272k 0 0:00:05 0:00:05 --:--:-- 2354k
No checksum for downloaded archive, recording checksum in user configuration.
ruby-2.1.6 - #extracting ruby-2.1.6 to /Users/davea/.rvm/src/ruby-2.1.6....
ruby-2.1.6 - #configuring....................................................
ruby-2.1.6 - #post-configuration.
ruby-2.1.6 - #compiling.......................................................................................................................................
ruby-2.1.6 - #installing...............
ruby-2.1.6 - #making binaries executable..
ruby-2.1.6 - #downloading rubygems-2.4.8
ruby-2.1.6 - #extracting rubygems-2.4.8.....
ruby-2.1.6 - #removing old rubygems.........
ruby-2.1.6 - #installing rubygems-2.4.8......................
ruby-2.1.6 - #gemset created /Users/davea/.rvm/gems/ruby-2.1.6#global
ruby-2.1.6 - #importing gemset /Users/davea/.rvm/gemsets/global.gems...............................................
ruby-2.1.6 - #generating global wrappers........
ruby-2.1.6 - #gemset created /Users/davea/.rvm/gems/ruby-2.1.6
ruby-2.1.6 - #importing gemsetfile /Users/davea/.rvm/gemsets/default.gems evaluated to empty gem list
ruby-2.1.6 - #generating default wrappers........
ruby-2.1.6 - #adjusting #shebangs for (gem irb erb ri rdoc testrb rake).
Install of ruby-2.1.6 - #complete
Ruby was built without documentation, to build it run: rvm docs generate-ri
localhost:lti_tool_provider_example-master davea$ bundle install
-bash: bundle: command not found
How do I restore the “bundle” command without interfering with the Ruby 2.1.3 version I just installed?

Answer 1

Bundle with Ruby 2.1.6
You just need to install bundler :
rvm use ruby-2.1.6
gem install bundler
This will be installed in a gemset specific to ruby-2.1.6, so it won't interfere with anything you installed with ruby-2.3.0. You can use
bundle install
to install the required gems.
Trying with Ruby 2.3.0
Alternatively, you could just try the example you downloaded with ruby-2.3.0 by either changing the
ruby '2.1.6'
line or deleting it from the Gemfile.

Answer 2

I experienced this same issue. For my case, the cause of the issue was because of two conflicting versions of the bundler gem that are very close in version number.
bundler (2.0.2, 2.0.1, default: 1.17.2)
The issue was from the bundler versions 2.0.2 and version 2.0.1
This is what I did to fix it.
Open your terminal or command line
Ctrl + Alt + T
N/B: The command above is for Linux Users, the one for Windows users might be different
Display a list of all your local gems for the bundler gem
gem list bundler
N/B: The command above is for rbenv version manager, the one for rvm might be different
Look through the displayed versions of the bundler gem, you will see some closely related conflicting versions like the one below
bundler (2.0.2, 2.0.1, default: 1.17.2)
Uninstall the bundler gem
gem uninstall bundler
Install a new copy of the bundler gem
gem install bundler
Try running the bundle install command again now
bundle install
That's all
I hope this helps.

Answer 3

Simply do the following
Open your terminal
Run gem uninstall bundler to uninstall previous versions of bundler
And then run gem install bundler to install a new copy of bundler
You can now run
bundle install
This worked for me

Answer 4

As mentioned above, you must re-install bundler gem again (because last one was and actually is attached to the previous version you had, as global library, you could actually go back and set it up as default again and see that bundler still there since usually all ruby versions you install thru version managers rbenv or rvm will be kept locally in your machine user's folder.
Step by step run the following (just in case)
rvm list known
Let's say ruby-2.3.3 is the latest or the one you want to work with
rvm install ruby-2.3.3
rvm use --default 2.3.3
gem install bundler
bundle install
In my case i was using OSX also rvm in OSX rvm store rubies in /Users/some_user/.rvm/rubies/default so just remember to configure whatever your terminal is with the proper rvm's ruby path in this case the file i should double check will be .bash_profile and the line of code i would look for will be export PATH=$PATH:/Users/some_user/.rvm/rubies/default
Hope this is helpful for someone that just realizes how rvm and rbenv work around, i was expecting somehow that bundler being a key part of the process will be more like a core library per se (ruby), but instead bundler is a totally separated gem, which bring me back to think, what a gem! way to go! inspirational one!