Non è possibile installare capybara-webkit utilizzando il comando di installazione bundle in Rails 4

Question

Viene visualizzato un errore durante l'esecuzione del comando bundle install nell'applicazione Rails 4.

> ruby -v 
ruby 2.1.8p440 (2015-12-16 revision 53160) [i386-mingw32] 

> rails --version 
Could not find gem 'capybara-webkit x86-mingw32' in any of the gem sources listed in your Gemfile or available on this machine. 
Run `bundle install` to install missing gems. 

mio Gemfile

... 
..... 
group :development, :localtesting, :test do 
    gem 'sqlite3',  '1.3.11' 
    gem 'byebug',  '3.4.0' 
    #gem 'web-console', '2.0.0.beta3' 
    gem 'spring',  '1.1.3' 
    gem 'i18n-tasks' 
    gem 'capybara' 
    gem 'selenium-webdriver' 
    gem 'rspec' 
    gem 'rspec-rails' 
    gem 'rspec_junit_formatter' 
    gem 'capybara-webkit' 
end 
..... 
... 

errore

Installing capybara-webkit 1.10.1 with native extensions 

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

    C:/RailsInstaller/Ruby2.1.0/bin/ruby.exe extconf.rb 
*** extconf.rb failed *** 
Could not create Makefile due to some reason, probably lack of necessary 
libraries and/or headers. Check the mkmf.log file for more details. You may 
need configuration options. 

Provided configuration options: 
     --with-opt-dir 
     --without-opt-dir 
     --with-opt-include 
     --without-opt-include=${opt-dir}/include 
     --with-opt-lib 
     --without-opt-lib=${opt-dir}/lib 
     --with-make-prog 
     --without-make-prog 
     --srcdir=. 
     --curdir 
     --ruby=C:/RailsInstaller/Ruby2.1.0/bin/ruby 
     --with-gl-dir 
     --without-gl-dir 
     --with-gl-include 
     --without-gl-include=${gl-dir}/include 
     --with-gl-lib 
     --without-gl-lib=${gl-dir}/lib 
     --with-zlib-dir 
     --without-zlib-dir 
     --with-zlib-include 
     --without-zlib-include=${zlib-dir}/include 
     --with-zlib-lib 
     --without-zlib-lib=${zlib-dir}/lib 
Command 'qmake ' not available 

extconf failed, exit code 1 

Gem files will remain installed in C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/capybara-webkit-1.10.1 for inspection. 
Results logged to C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/extensions/x86-mingw32/2.1.0/capybara-webkit-1.10.1/gem_make.out 
Using guard-minitest 2.3.1 
Using actionview 4.2.2 
Using composite_primary_keys 8.1.2 
Using friendly_id 5.1.0 
Using paper_trail 4.0.2 
An error occurred while installing capybara-webkit (1.10.1), and Bundler cannot 
continue. 
Make sure that `gem install capybara-webkit -v '1.10.1'` succeeds before 
bundling. 

Nota: Ho già provato a guardare in un post con problema simile Cannot install capybara-webkit gem e ho cercato di seguire la soluzione eseguendo il seguente comando. Ma ho seguito l'errore.

> qmake -v 
'qmake' is not recognized as an internal or external command, 
operable program or batch file. 

Answer 1

Le istruzioni di installazione si trovano nel wiki di capybara-webkit - https://github.com/thoughtbot/capybara-webkit/wiki/Installing-Qt-and-compiling-capybara-webkit. Ti consigliamo di installare Qt 5.5.1 (5.6 è supportato solo se il modulo QtWebKit viene compilato separatamente)

Answer 2

Ho il sistema OS X El Capitan. Ho rintracciato su questo link:

https://github.com/thoughtbot/capybara-webkit/wiki/Installing-Qt-and-compiling-capybara-webkit

poi

gem install capybara-webkit -- --with-opt-include=/usr/local/bin/qmake 

Questo problema è stato risolto.