LoadError: cannot load such file -- bcrypt_ext on Windows 2008 x64 server

Question

I upgraded my environment from Ruby 2.0.0 to 2.2.3.

I also upgraded (overwrite) DevKit, and re-run ruby dk.rb install.

I removed Gemfile.lock and ran bundle install to start with a brand new environment. Everything looks ok, but I get the error:

E:\Projects\development\Stairs>rake db:migrate 
rake aborted!
LoadError: cannot load such file -- bcrypt_ext
E:/Projects/development/Stairs/config/application.rb:7:in `<top (required)>'
E:/Projects/development/Stairs/Rakefile:4:in `<top (required)>'
LoadError: cannot load such file -- 2.2/bcrypt_ext
E:/Projects/development/Stairs/config/application.rb:7:in `<top (required)>'
E:/Projects/development/Stairs/Rakefile:4:in `<top (required)>'
(See full trace by running task with --trace)

I first had the same issue with Nokogiri, which I solved using this solution : Nokogiri load error using Juloi Elixir's solution and installing Nokogiri from a local copy.

But I don't feel like doing this foreach gem! It looks like ruby is searching the gem using a ./ or ./2.2 path, while gems are stored in a ./2.2.0 path. Is this configurable? How can I solve this issue?

Note: Gemfile contains gem 'bcrypt', '~> 3.1.10'

Thanks!

Answer 1

I spent an entire hour fixing this, just now.

Well what I did was I followed some advice online to do a

gem install bcrypt --platform=ruby

And then, it worked in irb.

irb(main):001:0> require 'bcrypt'
=> true

Later when I had to do a bundle install, for some odd reason rails installed another bcrypt and the error was back. So I had two folders in my gem root.

bcrypt-3.1.10
bcrypt-3.1.10-x64-mingw32

So, since the first folder was the one that got built with the devkit, and it works. I deleted the contents of the second folder and copied the contents of the first into it.

Seems to be working as I'm writing this.

Answer 2

Solution was here: bcrypt-ruby@github:

Rebuild locally the bcrypt gem:

1. Change to the gem directory \Ruby22-x64\lib\ruby\gems\2.2.0\gems\bcrypt-3.1.10-x64-mingw32\ext\mri>
2. Run ruby extconf.rb
3. Run make
4. Run make install

Note that this works only if your DevKit environment is correctly setup (run devkitvars.bat).

Answer 3

@user1185081 's solution worked for me in a windows machine. I ran following commands and worked like magic:

$ cd C:\RailsInstaller\Ruby2.2.0\lib\ruby\gems\2.2.0\gems\bcrypt-3.1.10-x86-mingw32\ext\mri  
$ ruby extconf.rb
$ C:\<DevKit Path>\devkitvars.bat  (assuming you have devkit installed)(Ran this instead of running "make" because it was not recognized as an internal or external command)
$ make install