avoid installing binding_of_caller if it's already installed

BetterErrors · Sep 8, 2013 · 71a3bfa · 71a3bfa
1 parent db808bf
commit 71a3bfa
Showing 1 changed file with 4 additions and 2 deletions.
diff --git a/ext/mkrf_conf.rb b/ext/mkrf_conf.rb
@@ -1,7 +1,9 @@
-require 'rubygems/dependency_installer' 
+require 'rubygems/dependency_installer'
 
 gem = Gem::DependencyInstaller.new
 
 if ["rbx", "ruby"].include?(RUBY_ENGINE)
-  gem.install "binding_of_caller", "0.7.2"
+  if Gem::Dependency.new("binding_of_caller", "0.7.2").matching_specs.empty?
+    gem.install "binding_of_caller", "0.7.2"
+  end
 end