An error occurred while installing nokogiri (1.6.2.1), and Bundler cannot continue.

系統爲mac os 10.11，command tool什麼的都安裝了

在執行bundle install時出現下面錯誤：

An error occurred while installing nokogiri (1.6.2.1), and Bundler cannot continue.

  Make sure that `gem install nokogiri -v '1.6.2.1'` succeeds before bundling.

往前翻了下，錯誤詳細爲：

Installing nokogiri 1.6.2.1 with native extensions
Building nokogiri using packaged libraries.

Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.

        /usr/local/bin/ruby extconf.rb
Building nokogiri using packaged libraries.
-----
libiconv is missing.  please visit http://nokogiri.org/tutorials/installing_nokogiri.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=/usr/local/bin/ruby
    --help
    --clean
    --use-system-libraries
    --enable-static
    --disable-static
    --with-zlib-dir
    --without-zlib-dir
    --with-zlib-include
    --without-zlib-include=${zlib-dir}/include
    --with-zlib-lib
    --without-zlib-lib=${zlib-dir}/lib
    --enable-cross-build
    --disable-cross-build


Gem files will remain installed in /Users/sophia/ashelf/vendor/bundle/gems/nokogiri-1.6.2.1 for inspection.
Results logged to /Users/sophia/ashelf/vendor/bundle/gems/nokogiri-1.6.2.1/ext/nokogiri/gem_make.out

裏面有一句：「libiconv is missing. please visit http://nokogiri.org/tutorials/installing_nokogiri.html for help with installing dependencies.」

試了一下這個方法：

 brew install libiconv

brew link libiconv

而後看到輸出的連接地址爲「/usr/local/Cellar/libiconv/1.14/」

執行命令：

gem install nokogiri  -v '1.6.2.1' -- --with-iconv-dir=/usr/local/Cellar/libiconv/1.14/

再bundle install仍是不行，最後找到一個方法：

bundle config build.nokogiri -v '1.6.2.1' \

      --with-iconv-lib=/usr/local/lib \

      --with-iconv-include=/usr/local/include

而後再bundle install 就能夠了。

 

上面的命令每次執行都沒有加 -v '1.6.2.1' ，因此一直裝的1.6.7.2，致使bundle install總失敗，好二啊/(ㄒoㄒ)/~~