Search code examples
rubyrubygemsgemspecs

Gemspec resolve dependencies

I wanted to create a gem with some dependencies. I followed a tutorial, here is the full code.

I have

s.add_dependency "sinatra"

In the gemspec. I build the gem. When I tried to install it with

gem install --local gemname.gem

I got

ERROR: Could not find a valid gem 'sinatra' (>= 0) in any repository

I instead expected that gem install will first install sinatra and then proceed with my gem.

How can I make it install any dependencies prior to my gem? I tried to:

  • add gem 'sinatra' to the gemfile
  • use add_runtime_dependency instead of add_dependency
  • require 'rubygems' on top of my gemspec file
Solution

  • TL;DR:

    gem install gemname.gem # NO --local switch

    When given, --local restricts all the actions to local domain, as clearly written in gem help install output:

    Local/Remote Options:

    -l, --local                      Restrict operations to the LOCAL domain

    That said, the above will succeed if and only sinatra is already available in local.