Add --skip-install flag to bundle add

3 files changed, 13 insertions, 2 deletions

diff --git a/lib/bundler/cli.rb b/lib/bundler/cli.rb
index 1b913024e2..3a15ec6dc5 100644
--- a/lib/bundler/cli.rb
+++ b/lib/bundler/cli.rb
@@ -333,7 +333,8 @@ module Bundler
     method_option "version", :aliases => "-v", :type => :string
     method_option "group", :aliases => "-g", :type => :string
     method_option "source", :aliases => "-s", :type => :string
-
+    method_option "skip-install", :type => :boolean, :banner =>
+      "Adds gem to gemfile but does not install it"
     def add(gem_name)
       require "bundler/cli/add"
       Add.new(options.dup, gem_name).run
diff --git a/lib/bundler/cli/add.rb b/lib/bundler/cli/add.rb
index 1fcbd22f28..e1a662161e 100644
--- a/lib/bundler/cli/add.rb
+++ b/lib/bundler/cli/add.rb
@@ -19,7 +19,7 @@ module Bundler
       dependency = Bundler::Dependency.new(@gem_name, version, @options)
 
       Injector.inject([dependency], :conservative_versioning => @options[:version].nil?) # Perform conservative versioning only when version is not specified
-      Installer.install(Bundler.root, Bundler.definition)
+      Installer.install(Bundler.root, Bundler.definition) unless @options["skip-install"]
     end
   end
 end
diff --git a/spec/commands/add_spec.rb b/spec/commands/add_spec.rb
index d1f2050aa0..194ff7651b 100644
--- a/spec/commands/add_spec.rb
+++ b/spec/commands/add_spec.rb
@@ -75,11 +75,21 @@ RSpec.describe "bundle add" do
   describe "with --source" do
     it "adds dependency with specified source" do
       bundle "add 'foo' --source='file://#{gem_repo2}'"
+
       expect(bundled_app("Gemfile").read).to match(%r{gem "foo", "~> 2.0", :source => "file:\/\/#{gem_repo2}"})
       expect(the_bundle).to include_gems "foo 2.0"
     end
   end
 
+  describe "with --skip-install" do
+    it "adds gem to Gemfile but is not installed" do
+      bundle "add foo --skip-install --version=2.0"
+
+      expect(bundled_app("Gemfile").read).to match(%r{gem "foo", "= 2.0"})
+      expect(the_bundle).to_not include_gems "foo 2.0"
+    end
+  end
+
   it "using combination of short form options works like long form" do
     bundle "add 'foo' -s='file://#{gem_repo2}' -g='development' -v='~>1.0'"
     expect(bundled_app("Gemfile").read).to include %(gem "foo", "~> 1.0", :group => [:development], :source => "file://#{gem_repo2}")