Installing Ruby / GSL in Heroku Application

问题

Context:

I have an application that makes heavy use of the GSL library and its Ruby bindings.
I'd like to deploy the app to Heroku. I'm very new to programming in general, much less deployment, and Heroku is very simple to use, especially for Rails apps.
I have GSL installed on my laptop. I am using the 'gsl' gem.

The Problem:

The gem requires that the GSL library already be installed.
GSL is not already installed in the Heroku environment.

So, unsurprisingly, I get this error from Heroku after I git push heroku master

-----> Heroku receiving push
-----> Removing .DS_Store files
-----> Ruby/Rails app detected
-----> Installing dependencies using Bundler version 1.2.0.rc
       Running: bundle install --without development:test --path vendor/bundle --binstubs bin/ --deployment

...
Installing gsl (1.14.7) with native extensions
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.
/usr/local/bin/ruby extconf.rb
checking gsl version... *** 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
extconf.rb:237:in `rescue in <main>': Check GSL>=0.9.4 is installed, and the command "gsl-config" is in search path. (RuntimeError)
from extconf.rb:138:in `<main>'

The (Probable) Solution:

It seems that working with Heroku's buildpacks is the likely route. This (packing binary buildpack dependencies) seems promising.
I just don't understand what is going on in the tutorial, or how to use vulcan.

What I am hoping for:

An easy-to-follow explanation of how to make the GSL library available to my application on Heroku.

Thank you so much!!

回答1:

Hey Tom (what's the likelihood of two people named Tom needing to use ruby-gsl on heroku?) I've yet to test it out (I really don't exactly know what I'm doing and I don't really have an app ready yet to test it with) but maybe this'll work:

heroku-buildpack-gsl-ruby

if not, well, we'll keep at it ;)

It's gsl 1.15 which is currently the latest.

Though in the future something like: package_nodejs instead for gsl might be nice (see hacking section of the readme). I'll probably add that soon (copy/paste, shudder, so not DRY).

来源：https://stackoverflow.com/questions/11874776/installing-ruby-gsl-in-heroku-application

标签

heroku

gsl

buildpack