Sé que esto es simple pero no puedo entenderlo. Necesito ejecutar un script en Ruby y requiere Nokogiri. Tengo alguna experiencia en otros idiomas pero no en Ruby.

Aquí está mi sistema:

Ruby 2.0.0-p195 (x64) está instalado @C: \ Programs \ RubyLanguage

El kit de desarrollo Ruby (mingw64-64-4.7.2-20130224-1432) está instalado @C: \ Programs \ RubyDevKit

Cuando corrogem install nokogiri Me sale este error:

    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'

Suficientemente fácil. Así que seguíel enlace de arriba e hizo el paso 3. Sin embargo, el paso 4 dice generar "config.yml". Así que lo hice. Ahora el archivo es una lista vacía con algunos comentarios. Todavía no puedo instalar Nokogiri debido al error anterior y parece que no consigo ningún lugar con DevKit. Lo que estoy diciendo es que los pasos en la instalación del kit de desarrollo no son lo suficientemente claros para mí.

Actualizar ahora dice que la instalación de Nokogiri falló (DevKit Works de acuerdo con el paso 5: Instalación de la documentación para json-1.8.0 1 gema instalada)

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 */

Registro de 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