When I require 'nokogiri' in Ruby 2.0, it has a error
`require': cannot load such file -- nokogiri/2.0/nokogiri (LoadError)
Is nokogiri not supporting Ruby 2.0 yet? I can see nokogiri in gem list
Ruby 2.0 support is not yet available for Windows. Follow along here for updates:
Yes, it works fine:
RUBY_VERSION # => "2.0.0"
require 'nokogiri'
doc = Nokogiri::HTML('<html><body><p>foo</p></body></html>')
doc.at('p').text # => "foo"
Nokogiri now support Ruby 2.0, even on Windows, see HERE
Related
I am using bundler to require all the gems in my project. However, it's not working for yaml/logger.
If I add gem 'yaml' to my gemfile, and run bundle install, I get:
Could not find gem 'yaml (>= 0) ruby' in the gems available on this machine.
But I require it normally just fine. What am I doing wrong?
Thanks
YAML is part of the Ruby Standard Library, and not a Gem.
You do not need to add it to your Gemfile, just require it.
irb(main):001:0> require 'yaml'
=> true
irb(main):002:0> YAML
=> Psych
The same applies for Logger.
I'm having a problem using unroller. I have installed the gem and wrote this simple program to help focus on the problem i'm having:
#!/usr/bin/ruby
require 'rubygems'
require 'unroller'
Unroller::trace
def foo(p1, p2)
puts p1
puts p2
end
foo("param1", "param2")
Running the program yields:
/Library/Ruby/Gems/1.8/gems/facets-2.9.3/lib/core/facets/filetest/separator_pattern.rb:5: warning: already initialized constant SEPARATOR_PATTERN
/Library/Ruby/Gems/1.8/gems/facets-2.9.3/lib/core/facets/string/bracket.rb:3: warning: already initialized constant BRA2KET
/Library/Ruby/Site/1.8/rubygems/custom_require.rb:36:in `gem_original_require': no such file to load -- facets/methodspace (LoadError)
from /Library/Ruby/Site/1.8/rubygems/custom_require.rb:36:in `require'
from /Library/Ruby/Gems/1.8/gems/unroller-1.0.0/lib/unroller.rb:4
from /Library/Ruby/Site/1.8/rubygems/custom_require.rb:60:in `gem_original_require'
from /Library/Ruby/Site/1.8/rubygems/custom_require.rb:60:in `require'
from ./ut:4
My ruby version is ruby 1.8.7 (2011-12-28 patchlevel 357). I also installed ruby on my Windows development box and get the same error and that ruby version is 1.9.3 so it does not appear to be related to the version of Ruby I'm on.
Anyone have any ideas?
Thanks very much in advance!
jon
This is a bug of unroller gem, described here: https://github.com/TylerRick/unroller/issues/1. unroller automatically requires the latest version of facets gem and the version 2.9 breaks it. (BTW gems should never use '>=' when loading dependencies, that's why '~>' is for.)
It's not that difficult to hotfix locally by using bundler and hardcoding facets gem to specific version before requiring unroller (so the specific facets version gets loaded instead of latest 2.9).
create Gemfile:
source 'http://rubygems.org'
gem 'facets', '2.8.4'
gem 'termios' # you're gonna need this gem too, for some reason
gem 'unroller'
run bundle install and then either run the script by bundle exec ruby test.rb or require bundler/setup in it:
require 'rubygems'
require 'bundler/setup'
require 'unroller'
...
UPDATE: or if you don't wanna deal with bundler, try this first, it could work too:
require 'rubygems'
gem 'facets', '2.8.4'
require 'unroller'
...
Why am I not able to use these lines in a Gemfile:
gem 'date'
gem 'pp'
Must these be required in file instead like this:
require 'date'
require 'pp'
Or is there a way to mix them into your Gemfile so they are available project wide?
I think that date and pp are part of ruby 1.9.2 core and as a result are different from regular gems but I don't exactly understand why...
Because those are not Gems but part of the Ruby standard library. But the standard library isnt loaded by default, hence the require statements
I have successfully installed:
Ruby 1.8.7-p334
Rubygems 1.7.2
rake 0.9.0
qtruby4 2.1.0 mswin32
Now the following block of code
require 'rubygems'
require 'Qt4'
gives me an error:
C:/Ruby187/lib/ruby/site_ruby/1.8/rubygems.rb:926:in report_activate_error': RubyGem version error: qtruby4(2.1.0 not >= 0) (Gem::LoadError)
from C:/Ruby187/lib/ruby/site_ruby/1.8/rubygems.rb:244:inactivate_dep'
from C:/Ruby187/lib/ruby/site_ruby/1.8/rubygems.rb:236:in activate'
from C:/Ruby187/lib/ruby/site_ruby/1.8/rubygems.rb:213:intry_activate'
from C:/Ruby187/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:56:in `require'
from C:/Users/nick/Documents/NetBeansProjects/RubyApplication2/lib/main.rb:4
Everything good when requiring just 'rubygems'. My OS is Windows 7.
Make sure you require correct gem name
require 'Qt4' seems like little different as almost all the ruby gem names are in simple letters
isnt your gem name 'qtruby4' by any chance, if so try
require 'rubygems'
require 'qtruby4'
HTH
sameera
Specifically, the ruby-oci8 gem. I have both 1.0.7 and 2.0.4 installed. I want 1.0.7.
I can just require oci8, but I don't get the version I want.
irb(main):001:0> require 'oci8'
=> true
irb(main):002:0> OCI8::VERSION
=> "2.0.4"
I can require using the full path to the file, which works, but is not going to be portable:
irb(main):001:0> require 'C:\Ruby\lib\ruby\gems\1.8\gems\ruby-oci8-1.0.7-x86-mswin32-60\lib\oci8'
=> true
irb(main):002:0> OCI8::VERSION
=> "1.0.7"
I can use the gem command to ask for the version I want, but it doesn't appear to actually load the library:
irb(main):001:0> gem 'ruby-oci8', :lib=>'oci8', :version=>'=1.0.7'
=> true
irb(main):002:0> OCI8::VERSION
NameError: uninitialized constant OCI8
from (irb):2
I would definitely favor this last approach if would load the library, rather than just confirming that it's present on my system. What am I missing?
My problem was twofold:
1) confusing gem command syntax with that used in config.gem lines in a rails environment.rb configuration file.
2) failing to issue a require command after the gem command.
Proper usage in a script is:
gem 'ruby-oci8', '=1.0.7'
require 'oci8' # example is confusing; file required (oci8.rb) is not
# same name as gem, as is frequently the case
Proper usage in a rails 2.3.x environment.rb file is:
config.gem "ruby-oci8", :version=>'1.0.7'
Thanks to the folks at http://www.ruby-forum.com/topic/109100
Try the following syntax (instead of require):
require_gem 'RMagick' , '=1.10'
require_gem 'RMagick' , '>=1.10'
require_gem 'rake', '>=0.7.0', '<0.9.0'