问题
When running gem install RedCloth (on Windows XP) I got:
Fetching: RedCloth-4.2.8.gem (100%)
Temporarily enhancing PATH to include DevKit...
Building native extensions. This could take a while...
Successfully installed RedCloth-4.2.8
1 gem installed
Installing ri documentation for RedCloth-4.2.8...
Installing RDoc documentation for RedCloth-4.2.8...
ERROR: While generating documentation for RedCloth-4.2.8
... MESSAGE: error generating index.html: Error while evaluating D:/Programs/R
uby/lib/ruby/gems/1.9.1/gems/rdoc-3.9/lib/rdoc/generator/template/darkfish/index
.rhtml: undefined method `[]' for nil:NilClass (RDoc::Error)
... RDOC args: --op D:/Programs/Ruby/lib/ruby/gems/1.9.1/doc/RedCloth-4.2.8/rdoc
--charset=UTF-8 --line-numbers --title RedCloth --main README.rdoc lib lib/case
_sensitive_require ext README.rdoc COPYING CHANGELOG --title RedCloth-4.2.8 Docu
mentation --quiet
Why do I get this error ?
Then I added require 'RedCloth' to config/environment.rb, and tried to run rails s, but unfortunately I got:
D:/Programs/Ruby/lib/ruby/gems/1.9.1/gems/RedCloth-4.2.8/lib/redcloth.rb:12:in `
require': no such file to load -- 1.9/redcloth_scan (LoadError)
Couldn't load 1.9/redcloth_scan
The $LOAD_PATH was: ...
What am I doing wrong ?
I use Rails 3.0.1, Ruby 1.9.2.
bundle show RedCloth
=> D:/Programs/Ruby/lib/ruby/gems/1.9.1/gems/RedCloth-4.2.8
回答1:
Here is my workaround to your second error, "Couldn't load 1.9/redcloth_scan", which looks like a bug of RedCloth on Windows. After gem install RedCloth --no-rdoc, I run
cd c:\Ruby192\lib\ruby\gems\1.9.1\gems\RedCloth-4.2.8\lib
mkdir 1.9
copy redcloth_scan.so 1.9
You should replace that directory with your path, "D:\Programs\Ruby\lib\ruby\gems\1.9.1\gems\RedCloth-4.2.8\lib", of course.
回答2:
Be sure to name the directory according to the error message. E.g. for Ruby 2.1 and
LoadError: cannot load such file -- 2.1/redcloth_scan
One should create the directory "2.1" in the "lib" directory and copy redcloth_scan.so to it
来源：https://stackoverflow.com/questions/7290868/how-to-install-redcloth-on-windows