gem

问题 I'm following codeschool's class on rspec. Installing worked fine. I made a file called rspec-zombie for the project. Fine. But when I tried rspec --init in powershell, I got an unholy error message. I'm under the impression there are supposed to be some files made inside the directory, which aren't there. It follows. C:\Users\Roman\The-Odin-Project\rspec-zombie> rspec --init create .rspec C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/rspec-support-3.1.0/lib/rspec/support/directory

问题 Got the DevKit installed and re-ran the ffi install….got this as an output: C:\Documents and Settings\******>gem install ffi Temporarily enhancing PATH to include DevKit... Building native extensions. This could take a while... ERROR: Error installing ffi: ERROR: Failed to build gem native extension. C:/Ruby192/bin/ruby.exe extconf.rb checking for ffi.h... no checking for ffi.h in /usr/local/include... no checking for rb_thread_blocking_region()... yes checking for ruby_thread_has_gvl_p()...

问题 Using Ubuntu, when I run " bundle install " to set up my Rails environment, it throws an error during the JSON gem installation: Installing json (1.7.3) with native extensions Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension. /usr/bin/ruby1.9.1 extconf.rb /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require': cannot load such file -- mkmf (LoadError) from /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require' from extconf.rb:1:in `<main>' Gem

问题 I've found myself twice in this situation: I install a gem on my system and start using it from my Rails project. Eventually I need to make some changes to that gem. How should I proceed? Ideally I'd like to check out the source code of that gem somewhere, like ~/third_party/gems, work on it and have my Rails project use that instead. Is that possible? In all the cases the gems were at github so I would probably for it at github, clone it, make my chances and maintain my own branch. I suppose

问题 I'm stuck trying to install rails on my mac. I have OS X 10.6.8 and I have confirmed that I have Ruby, version 1.8.7 I ran sudo gem update and sudo gem update --system to get the latest versions of the software. However, when I run sudo gem install rails I get this error: ERROR: Error installing rails: ERROR: Failed to build gem native extension. /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby extconf.rb mkmf.rb can't find header files for ruby at /System/Library

问题 Update: Check out this follow-up question: Gem Update on Windows - is it broken? On Windows, when I do this: gem install sqlite3-ruby I get the following error: Building native extensions. This could take a while... ERROR: Error installing sqlite3-ruby: ERROR: Failed to build gem native extension. c:/ruby/bin/ruby.exe extconf.rb install sqlite3-ruby --platform Win32 checking for fdatasync() in rt.lib... no checking for sqlite3.h... no nmake 'nmake' is not recognized as an internal or external

问题 $ rvm use Using /home/owner/.rvm/gems/ruby-2.1.2 $ gem install rails ERROR: While executing gem ... (Gem::RemoteFetcher::FetchError) Errno::ECONNREFUSED: Connection refused - connect(2) for "your-dns-needs-immediate-attention.network" port 80 (http://your-dns-needs-immediate-attention.network/quick/Marshal.4.8/thread_safe-0.3.4.gemspec.rz) $ gem update --system ... $ gem -v 2.4.1 $ gem install rails ERROR: While executing gem ... (Gem::RemoteFetcher::FetchError) Errno::ECONNREFUSED:

问题 $ rvm use Using /home/owner/.rvm/gems/ruby-2.1.2 $ gem install rails ERROR: While executing gem ... (Gem::RemoteFetcher::FetchError) Errno::ECONNREFUSED: Connection refused - connect(2) for "your-dns-needs-immediate-attention.network" port 80 (http://your-dns-needs-immediate-attention.network/quick/Marshal.4.8/thread_safe-0.3.4.gemspec.rz) $ gem update --system ... $ gem -v 2.4.1 $ gem install rails ERROR: While executing gem ... (Gem::RemoteFetcher::FetchError) Errno::ECONNREFUSED:

问题 I recently wanted to update my gem bundle but ran into installation problems with libv8 (requirement for therubyracer): Installing libv8 (3.3.10.3) with native extensions /usr/local/rvm/rubies/ruby-1.9.3-head/lib/ruby/site_ruby/1.9.1/rubygems/installer.rb:552:in `rescue in block in build_extensions': ERROR: Failed to build gem native extension. (Gem::Installer::ExtensionBuildError) /usr/local/rvm/rubies/ruby-1.9.3-head/bin/ruby extconf.rb Checking for Python...*** extconf.rb failed *** Could

问题 I am doing a bundle install and all of the gems work fine except JSON when it get to the JSON gem I receive this error. Installing json (1.6.1) with native extensions c:/Ruby192/lib/ruby/site_ruby/1.9.1/rubygems/installer.rb:55 2:in `rescue in block in build_extensions': ERROR: Failed to build gem native extension. (Gem::Installer::E xtensionBuildError) c:/Ruby192/bin/ruby.exe extconf.rb checking for re.h... *** extconf.rb failed *** Could not create Makefile due to some reason, probably lack