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-rw-r--r--rubocop/cop/gem_fetcher.rb28
-rw-r--r--rubocop/rubocop.rb1
2 files changed, 29 insertions, 0 deletions
diff --git a/rubocop/cop/gem_fetcher.rb b/rubocop/cop/gem_fetcher.rb
new file mode 100644
index 00000000000..4a63c760744
--- /dev/null
+++ b/rubocop/cop/gem_fetcher.rb
@@ -0,0 +1,28 @@
+module RuboCop
+ module Cop
+ # Cop that checks for all gems specified in the Gemfile, and will
+ # alert if any gem is to be fetched not from the RubyGems index.
+ # This enforcement is done so as to minimize external build
+ # dependencies and build times.
+ class GemFetcher < RuboCop::Cop::Cop
+ MSG = 'Do not use gems from git repositories, only use gems from RubyGems.'
+
+ GIT_KEYS = [:git, :github]
+
+ def on_send(node)
+ file_path = node.location.expression.source_buffer.name
+ return unless file_path.end_with?("Gemfile")
+
+ func_name = node.children[1]
+ return unless func_name == :gem
+
+ node.children.last.each_node(:pair) do |pair|
+ key_name = pair.children[0].children[0].to_sym
+ if GIT_KEYS.include?(key_name)
+ add_offense(node, :selector)
+ end
+ end
+ end
+ end
+ end
+end
diff --git a/rubocop/rubocop.rb b/rubocop/rubocop.rb
index 7922e19768b..7f20754ee51 100644
--- a/rubocop/rubocop.rb
+++ b/rubocop/rubocop.rb
@@ -1,3 +1,4 @@
require_relative 'migration_helpers'
require_relative 'cop/migration/add_index'
require_relative 'cop/migration/column_with_default'
+require_relative 'cop/gem_fetcher'