Eu sei que isso é simples, mas eu não consigo entender. Eu preciso executar um script em Ruby e requer Nokogiri. Eu tenho alguma experiência em outras linguagens, mas não em Ruby.

Aqui está o meu sistema:

Ruby 2.0.0-p195 (x64) é instalado @C: \ Programas \ RubyLanguage

O Ruby Development Kit (mingw64-64-4.7.2-20130224-1432) está instalado @C: \ Programas \ RubyDevKit

Quando eu corrogem install nokogiri Eu recebo este erro:

    ERROR:  Error installing nokogiri:
        The 'nokogiri' native gem requires installed build tools.

Please update your PATH to include build tools or download the DevKit
from 'http://rubyinstaller.org/downloads' and follow the instructions
at 'http://github.com/oneclick/rubyinstaller/wiki/Development-Kit'

Bastante fácil. Então eu seguio link acima e fiz para o passo 3. No entanto, o passo 4 diz gerar "config.yml". Então eu fiz. Agora o arquivo é uma lista vazia com alguns comentários. Ainda não consigo instalar o Nokogiri por causa do erro acima e não consigo chegar a lugar nenhum com o DevKit. O que estou dizendo é que as etapas na instalação do Kit de Desenvolvimento não estão claras o suficiente para mim.

Atualizar agora diz que a instalação do Nokogiri falhou (o DevKit Works de acordo com a etapa 5: Instalando a documentação do json-1.8.0 1 gem installed)

mkmf.log: package configuration for libxslt is not found
package configuration for libxml-2.0 is not found
package configuration for libiconv is not found
find_header: checking for libxml/parser.h... -------------------- no

"x86_64-w64-mingw32-gcc -o conftest.exe -IC:/Programs/RubyLanguage/include/ruby-2.0.0/x64-mingw32 -IC:/Programs/RubyLanguage/include/ruby-2.0.0/ruby/backward -IC:/Programs/RubyLanguage/include/ruby-2.0.0 -I. -IC:/Programs/RubyLanguage/include/libxml2 -IC:/Programs/RubyLanguage/include -DFD_SETSIZE=2048 -D_WIN32_WINNT=0x0501 -D_FILE_OFFSET_BITS=64   -O3 -fno-omit-frame-pointer -fno-fast-math -g -Wall -Wextra -Wno-unused-parameter -Wno-parentheses -Wno-long-long -Wno-missing-field-initializers -Wunused-variable -Wpointer-arith -Wwrite-strings -Wdeclaration-after-statement -Wimplicit-function-declaration  -DXP_WIN -DXP_WIN32 -DUSE_INCLUDED_VASPRINTF -O3 -Wall -Wcast-qual -Wwrite-strings -Wconversion -Wmissing-noreturn -Winline conftest.c  -L. -LC:/Programs/RubyLanguage/lib -LC:/Programs/RubyLanguage/lib -L.      -lx64-msvcrt-ruby200  -lshell32 -lws2_32 -limagehlp -lshlwapi   "
In file included from C:/Programs/RubyLanguage/include/ruby-2.0.0/ruby/defines.h:153:0,
                 from C:/Programs/RubyLanguage/include/ruby-2.0.0/ruby/ruby.h:70,
                 from C:/Programs/RubyLanguage/include/ruby-2.0.0/ruby.h:33,
                 from conftest.c:1:
C:/Programs/RubyLanguage/include/ruby-2.0.0/ruby/win32.h: In function 'rb_w32_pow':
C:/Programs/RubyLanguage/include/ruby-2.0.0/ruby/win32.h:776:16: warning: conversion to 'double' from 'long double' may alter its value [-Wconversion]
In file included from C:/Programs/RubyLanguage/include/ruby-2.0.0/ruby.h:33:0,
                 from conftest.c:1:
C:/Programs/RubyLanguage/include/ruby-2.0.0/ruby/ruby.h: In function 'rb_float_value':
C:/Programs/RubyLanguage/include/ruby-2.0.0/ruby/ruby.h:777:6: warning: negative integer implicitly converted to unsigned type [-Wsign-conversion]
C:/Programs/RubyLanguage/include/ruby-2.0.0/ruby/ruby.h:777:6: warning: negative integer implicitly converted to unsigned type [-Wsign-conversion]
checked program was:
/* begin */
1: #include "ruby.h"
2: 
3: #include <winsock2.h>
4: #include <windows.h>
5: int main(int argc, char **argv)
6: {
7:   return 0;
8: }
/* end */

"x86_64-w64-mingw32-gcc -E -IC:/Programs/RubyLanguage/include/ruby-2.0.0/x64-mingw32 -IC:/Programs/RubyLanguage/include/ruby-2.0.0/ruby/backward -IC:/Programs/RubyLanguage/include/ruby-2.0.0 -I. -IC:/Programs/RubyLanguage/include/libxml2 -IC:/Programs/RubyLanguage/include -DFD_SETSIZE=2048 -D_WIN32_WINNT=0x0501 -D_FILE_OFFSET_BITS=64   -O3 -fno-omit-frame-pointer -fno-fast-math -g -Wall -Wextra -Wno-unused-parameter -Wno-parentheses -Wno-long-long -Wno-missing-field-initializers -Wunused-variable -Wpointer-arith -Wwrite-strings -Wdeclaration-after-statement -Wimplicit-function-declaration  -DXP_WIN -DXP_WIN32 -DUSE_INCLUDED_VASPRINTF -O3 -Wall -Wcast-qual -Wwrite-strings -Wconversion -Wmissing-noreturn -Winline  conftest.c -o conftest.i"
conftest.c:5:27: fatal error: libxml/parser.h: No such file or directory
compilation terminated.
checked program was:
/* begin */
1: #include "ruby.h"
2: 
3: #include <winsock2.h>
4: #include <windows.h>
5: #include <libxml/parser.h>
/* end */

Log CMD

Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation.  All rights reserved.

C:\Users\SEPEHR>gem install nokogiri
Temporarily enhancing PATH to include DevKit...
Building native extensions.  This could take a while...
ERROR:  Error installing nokogiri:
        ERROR: Failed to build gem native extension.

    C:/Programs/RubyLanguage/bin/ruby.exe extconf.rb
checking for libxml/parser.h... no
-----
libxml2 is missing.  please visit http://nokogiri.org/tutorials/installing_nokog
iri.html for help with installing dependencies.
-----
*** 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:/Programs/RubyLanguage/bin/ruby
        --with-zlib-dir
        --without-zlib-dir
        --with-zlib-include
        --without-zlib-include=${zlib-dir}/include
        --with-zlib-lib
        --without-zlib-lib=${zlib-dir}/lib
        --with-iconv-dir
        --without-iconv-dir
        --with-iconv-include
        --without-iconv-include=${iconv-dir}/include
        --with-iconv-lib
        --without-iconv-lib=${iconv-dir}/lib
        --with-xml2-dir
        --without-xml2-dir
        --with-xml2-include
        --without-xml2-include=${xml2-dir}/include
        --with-xml2-lib
        --without-xml2-lib=${xml2-dir}/lib
        --with-xslt-dir
        --without-xslt-dir
        --with-xslt-include
        --without-xslt-include=${xslt-dir}/include
        --with-xslt-lib
        --without-xslt-lib=${xslt-dir}/lib
        --with-libxslt-config
        --without-libxslt-config
        --with-pkg-config
        --without-pkg-config
        --with-libxml-2.0-config
        --without-libxml-2.0-config
        --with-pkg-config
        --without-pkg-config
        --with-libiconv-config
        --without-libiconv-config
        --with-pkg-config
        --without-pkg-config


Gem files will remain installed in C:/Programs/RubyLanguage/lib/ruby/gems/2.0.0/
gems/nokogiri-1.6.0 for inspection.
Results logged to C:/Programs/RubyLanguage/lib/ruby/gems/2.0.0/gems/nokogiri-1.6
.0/ext/nokogiri/gem_make.out