Install issues with 2.2.0

[eheydrick]

Getting an error installing rainbow 2.2.0.

Gem::Ext::BuildError: ERROR: Failed to build gem native extension.
    current directory: /home/travis/.rvm/gems/ruby-2.3.0/gems/rainbow-2.2.0/ext
/home/travis/.rvm/rubies/ruby-2.3.0/bin/ruby mkrf_conf.rb
current directory: /home/travis/.rvm/gems/ruby-2.3.0/gems/rainbow-2.2.0/ext
/home/travis/.rvm/rubies/ruby-2.3.0/bin/ruby -rubygems
/home/travis/.rvm/gems/ruby-2.3.0/gems/rake-10.5.0/bin/rake
RUBYARCHDIR=/home/travis/.rvm/gems/ruby-2.3.0/extensions/x86_64-linux/2.3.0/rainbow-2.2.0
RUBYLIBDIR=/home/travis/.rvm/gems/ruby-2.3.0/extensions/x86_64-linux/2.3.0/rainbow-2.2.0
(in /home/travis/.rvm/gems/ruby-2.3.0/gems/rainbow-2.2.0)
fatal: Not a git repository (or any of the parent directories): .git
rake aborted!
LoadError: cannot load such file -- rspec/core/rake_task
/home/travis/.rvm/gems/ruby-2.3.0/gems/rainbow-2.2.0/Rakefile:2:in `<top
(required)>'
(See full trace by running task with --trace)
rake failed, exit code 1
Gem files will remain installed in
/home/travis/.rvm/gems/ruby-2.3.0/gems/rainbow-2.2.0 for inspection.
Results logged to
/home/travis/.rvm/gems/ruby-2.3.0/extensions/x86_64-linux/2.3.0/rainbow-2.2.0/gem_make.out
An error occurred while installing rainbow (2.2.0), and Bundler cannot
continue.
Make sure that `gem install rainbow -v '2.2.0'` succeeds before bundling.

[denisdefreyne]

Perhaps related, but I am getting a similar error:

Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

current directory:
/home/travis/build/nanoc/nanoc/vendor/bundle/ruby/2.4.0/gems/rainbow-2.2.0/ext
/home/travis/.rvm/rubies/ruby-2.4.0/bin/ruby mkrf_conf.rb

current directory:
/home/travis/build/nanoc/nanoc/vendor/bundle/ruby/2.4.0/gems/rainbow-2.2.0/ext
/home/travis/.rvm/rubies/ruby-2.4.0/bin/ruby -rubygems
/home/travis/build/nanoc/nanoc/vendor/bundle/ruby/2.4.0/gems/rake-12.0.0/exe/rake
RUBYARCHDIR=/home/travis/build/nanoc/nanoc/vendor/bundle/ruby/2.4.0/extensions/x86_64-linux/2.4.0/rainbow-2.2.0
RUBYLIBDIR=/home/travis/build/nanoc/nanoc/vendor/bundle/ruby/2.4.0/extensions/x86_64-linux/2.4.0/rainbow-2.2.0
(in /home/travis/build/nanoc/nanoc/vendor/bundle/ruby/2.4.0/gems/rainbow-2.2.0)
rake aborted!
LoadError: cannot load such file -- bundler/gem_tasks
/home/travis/build/nanoc/nanoc/vendor/bundle/ruby/2.4.0/gems/rainbow-2.2.0/Rakefile:1:in
`<top (required)>'
/home/travis/build/nanoc/nanoc/vendor/bundle/ruby/2.4.0/gems/rake-12.0.0/exe/rake:27:in
`<main>'
(See full trace by running task with --trace)

rake failed, exit code 1

Gem files will remain installed in
/home/travis/build/nanoc/nanoc/vendor/bundle/ruby/2.4.0/gems/rainbow-2.2.0 for
inspection.
Results logged to
/home/travis/build/nanoc/nanoc/vendor/bundle/ruby/2.4.0/extensions/x86_64-linux/2.4.0/rainbow-2.2.0/gem_make.out

An error occurred while installing rainbow (2.2.0), and Bundler cannot
continue.
Make sure that `gem install rainbow -v '2.2.0'` succeeds before bundling.

This particular error is a LoadError: cannot load such file -- bundler/gem_tasks, though—not the same error as you’re getting.

[odcinek]

Same here, facebook/between-meals#64

[tardate]

merging "2.2.0 failed to build gem native extension on travis-ci" #41 which I closed as a duplicate. Same issue; my notes:

just hit this issue on travis-ci: https://travis-ci.org/benbalter/jekyll-readme-index/builds/187073263
when the latest build pulled 2.2.0; previously it was using 2.1.0

Installing rainbow 2.2.0 with native extensions
Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

As usual, travis tried 3 times and gave up, building under ubuntu. But locally on MacOSX (10.10.5 ruby 2.4.0), the project updated to 2.2.0 and built fine.

See the build log for exhaustive environment details.

Any idea why this platform variance and what it is about 2.2.0 that might have caused this?

[denisdefreyne]

FYI: I worked around this issue in my own project by adding a version constraint: gem 'rainbow', '>= 2.1.0', '< 2.2.0' — will remove this workaround once this issue is resolved!

[TrevorBramble]

Same for Ruby 2.3.3. Linux x86_64.

[jasnow]

Same for Ruby 2.3.3, Mac 10.11.6

[mattbrictson]

FWIW, I believe the problem is that rainbow's ext/mkrf_conf.rb is not written correctly. This file must generate a Rakefile, as illustrated in this example. Rainbow's does not do this.

When Rubygems subsequently runs rake in the ext directory, it can't find the Rakefile it is expecting there and falls back to the root Rakefile, which blows up with all the various errors we are seeing.

[jimeh]

In my case I came across this when trying to install Rubocop (which depends on rainbow) in a fresh Ruby version.

The main issue seems to be this:

LoadError: cannot load such file -- rspec/core/rake_task

It seems that the rspec gem is required to build the native extensions in 2.2.0. I don't know if this effects earlier versions.

Personally I fixed the issue by simply installing the rspec gem first, and then trying to install rubocop again.