Why doesn't nokogiri install?

Question

I'm having a devil of a time installing Nokogiri on Ubuntu 12.04. I use rbenv.

    $ gem install nokogiri -v '1.6.1'
    ERROR:  While executing gem ... (Errno::EACCES)
        Permission denied - /home/deploy/.rbenv/versions/2.0.0-p353/lib/ruby/gems/2.0.0/gems/nokogiri-1.6.1/.autotest

    $ sudo gem install nokogiri -v '1.6.1'
    ERROR:  Error installing nokogiri:
        nokogiri requires Ruby version >= 1.9.2.

    $ rbenv sudo gem install nokogiri -v '1.6.1'
    Building native extensions.  This could take a while...
    ERROR:  Error installing nokogiri:
        ERROR: Failed to build gem native extension.

        /home/deploy/.rbenv/versions/2.0.0-p353/bin/ruby extconf.rb

    Gem files will remain installed in /home/deploy/.rbenv/versions/2.0.0-p353/lib/ruby/gems/2.0.0/gems/nokogiri-1.6.1 for inspection.
    Results logged to /home/deploy/.rbenv/versions/2.0.0-p353/lib/ruby/gems/2.0.0/gems/nokogiri-1.6.1/ext/nokogiri/gem_make.out

    $ ruby -v
    ruby 2.0.0p353 (2013-11-22 revision 43784) [x86_64-linux]

    $ sudo ruby -v
    ruby 1.8.7 (2011-06-30 patchlevel 352) [x86_64-linux]

    $ rbenv sudo ruby -v 
    ruby 2.0.0p353 (2013-11-22 revision 43784) [x86_64-linux]

    $ echo $PATH
    /home/deploy/.rbenv/bin:/home/deploy/.rbenv/bin:/home/deploy/.rbenv/shims:/home/deploy/.rbenv/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games

It seems like I need some way of having sudo ruby -v give me 2.0.0. What am I missing?

Answer 1

You shouldn't need sudo when you do gem install with rbenv. Unfortunately, the ownership is usually not correct for the .rbenv directory on a new install.

Do this first to set your permissions correctly:

sudo chown -R $USER "$HOME/.rbenv"

Then go ahead and just run the install again:

gem install nokogiri -v '1.6.1'

It should work without sudo.

Answer 2

This works fine, but make sure to restart your terminal window after running sudo chown.

sudo chown -R $USER "$HOME/.rbenv" 

# close terminal, then run the gem install

gem install nokogiri