Use this to help get rid of the annoying warning when using Ruby 1.9 and you probably have Activesupport.

fix iconv will be deprecated, use String#encode instead

1. do a `gem env` to get your paths:

RubyGems Environment:
  - RUBYGEMS VERSION: 1.8.23
  - RUBY VERSION: 1.9.3 (2013-02-22 patchlevel 392) [x86_64-darwin12.2.0]
  - INSTALLATION DIRECTORY: /Users/deploy/.rbenv/versions/1.9.3-p392-railsexpress/lib/ruby/gems/1.9.1
  - RUBY EXECUTABLE: /Users/deploy/.rbenv/versions/1.9.3-p392-railsexpress/bin/ruby
  - EXECUTABLE DIRECTORY: /Users/deploy/.rbenv/versions/1.9.3-p392-railsexpress/bin
  - RUBYGEMS PLATFORMS:
    - ruby
    - x86_64-darwin-12
  - GEM PATHS:
     - /Users/deploy/.rbenv/versions/1.9.3-p392-railsexpress/lib/ruby/gems/1.9.1
     - /Users/deploy/.gem/ruby/1.9.1
  - GEM CONFIGURATION:
     - :update_sources => true
     - :verbose => true
     - :benchmark => false
     - :backtrace => false
     - :bulk_threshold => 1000
     - :sources => ["http://rubygems.org/"]
     - "gem" => "--no-ri --no-rdoc"
  - REMOTE SOURCES:
     - http://rubygems.org/
     

2. Open this folder in your text editor of choice:

subl .

3. Search for the following search term throughout all folders:

require 'iconv'

4. I found that the json-1.7.7 gem has a great algorithm for figuring out how to require 'iconv' or not.


  # Shortuct for iconv.
  if ::String.method_defined?(:encode) &&
    # XXX Rubinius doesn't support ruby 1.9 encoding yet
    defined?(RUBY_ENGINE) && RUBY_ENGINE != 'rbx'
  then
    # Encodes string using Ruby's _String.encode_
    def self.iconv(to, from, string)
      string.encode(to, from)
    end
  else
    require 'iconv'
    # Encodes string using _iconv_ library
    def self.iconv(to, from, string)
      Iconv.conv(to, from, string)
    end
  end


5. So I would just pick and choose from my results from the search before and comment out require 'iconv' and replace them with the above.

Get the gem paths directly:

gem env gempath
gem env gemdir

Search:

cd `gem env gemdir`
grep -rin "require 'iconv'" *