Come posso utilizzare rdiscount su Heroku?

Question

Sto provando a spingere una piccola app di prova su Heroku. Qui è l'applicazione e il file Gem:

App:

require 'sinatra' 
require 'haml' 
require 'rdiscount' 

set :markdown, :layout_engine => :haml, :layout => :layout 


get '/' do 
    haml :index 
end 

get '/blog' do 
    markdown :test 
end 

Gemfile:

source :rubygems 
gem 'sinatra' 
gem 'thin' 
gem 'haml' 
gem 'rdiscount' 

Prima di spingere a Heroku corro bundle install. Ma spinge a Heroku non riesce quando si tenta di installare la gemma rdiscount:

-----> Ruby/Rack app detected 
-----> Installing dependencies using Bundler version 1.3.0.pre.5 
    Running: bundle install --without development:test --path vendor/bundle --binstubs vendor/bundle/bin --deployment 
    Fetching gem metadata from http://rubygems.org/.......... 
    Fetching gem metadata from http://rubygems.org/.. 
    Using daemons (1.1.9) 
    Using eventmachine (1.0.0) 
    Using haml (3.1.7) 
    Using rack (1.4.3) 
    Using rack-protection (1.3.2) 
    installing rdiscount (2.0.7) 
    Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension. 
    /usr/local/bin/ruby extconf.rb 
    checking for random()... yes 
    checking for srandom()... yes 
    checking for rand()... yes 
    checking for srand()... yes 
    checking size of unsigned long... long 
    checking size of unsigned int... int 
    no int with size 4 
    *** 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 
    --with-rdiscount-dir 
    --without-rdiscount-dir 
    --with-rdiscount-include 
    --without-rdiscount-include=${rdiscount-dir}/include 
    --with-rdiscount-lib 
    --without-rdiscount-lib=${rdiscount-dir}/lib 
    Gem files will remain installed in /tmp/build_3aijv3ga0dy1y/vendor/bundle/ruby/1.9.1/gems/rdiscount-2.0.7 for inspection. 
    Results logged to /tmp/build_3aijv3ga0dy1y/vendor/bundle/ruby/1.9.1/gems/rdiscount-2.0.7/ext/gem_make.out 
    An error occurred while installing rdiscount (2.0.7), and Bundler cannot continue. 
    Make sure that `gem install rdiscount -v '2.0.7'` succeeds before bundling. 
! 
!  Failed to install gems via Bundler. 
! 
!  Heroku push rejected, failed to compile Ruby/rack app 

Capisco che rdiscount potrebbe dipendere da altre gemme o biblioteche e questa dipendenza non sembra essere risolto. Tuttavia, non capisco come risolvere questo problema. Potresti darmi qualche consiglio su come farlo funzionare?

Answer 1

Sembra esserci un problema con Ruby 1.9.2 su Heroku e su quanti byte possa essere int.

tenta di aggiungere ruby "1.9.3" a voi Gemfile in questo modo:

source :rubygems 
ruby "1.9.3" 

gem 'sinatra' 
gem 'thin' 
gem 'haml' 
gem 'rdiscount' 

mio test riprodotto l'errore sulla 1.9.2 ed è riuscito a 1.9.3