add --name-only option to print only the name of each gemcolby/bundler-list

4 files changed, 24 insertions, 6 deletions

diff --git a/lib/bundler/cli.rb b/lib/bundler/cli.rb
index 3cefc90970..3406a874ce 100644
--- a/lib/bundler/cli.rb
+++ b/lib/bundler/cli.rb
@@ -263,10 +263,11 @@ module Bundler
     # TODO: 2.0 remove `bundle show`
 
     if Bundler.feature_flag.list_command?
-      desc "list", "list all gems in the bundle"
+      desc "list", "List all gems in the bundle"
+      method_option "name-only", :type => :boolean, :banner => "print only the gem names"
       def list
         require "bundler/cli/list"
-        List.new.run
+        List.new(options).run
       end
 
       map %w[ls] => "list"
diff --git a/lib/bundler/cli/list.rb b/lib/bundler/cli/list.rb
index 623e2bc076..b5e7c1e650 100644
--- a/lib/bundler/cli/list.rb
+++ b/lib/bundler/cli/list.rb
@@ -2,12 +2,17 @@
 
 module Bundler
   class CLI::List
+    def initialize(options)
+      @options = options
+    end
+
     def run
-      specs = Bundler.load.specs.reject {|s| s.name == "bundler" }
+      specs = Bundler.load.specs.reject {|s| s.name == "bundler" }.sort_by(&:name)
+      return specs.each {|s| Bundler.ui.info s.name } if @options["name-only"]
 
       return Bundler.ui.info "No gems in the Gemfile" if specs.empty?
       Bundler.ui.info "Gems included by the bundle:"
-      specs.sort_by(&:name).each do |s|
+      specs.each do |s|
         Bundler.ui.info "  * #{s.name} (#{s.version}#{s.git_version})"
       end
 
diff --git a/man/bundle-list.ronn b/man/bundle-list.ronn
index 3a883bf5ff..79fcfff701 100644
--- a/man/bundle-list.ronn
+++ b/man/bundle-list.ronn
@@ -3,8 +3,13 @@ bundle-list(1) -- List all the gems in the bundle
 
 ## SYNOPSIS
 
-`bundle list`
+`bundle list` [--name-only]
 
 ## DESCRIPTION
 
-Prints a list of all the gems in the bundle including their version
+Prints a list of all the gems in the bundle including their version.
+
+## OPTIONS
+
+* `--name-only`:
+  Print only the name of each gem.
diff --git a/spec/commands/list_spec.rb b/spec/commands/list_spec.rb
index 850ca24dc2..0ea70f015c 100644
--- a/spec/commands/list_spec.rb
+++ b/spec/commands/list_spec.rb
@@ -8,6 +8,13 @@ RSpec.describe "bundle list", :bundler => "2" do
     G
   end
 
+  context "with name-only option" do
+    it "prints only the name of the gems in the bundle" do
+      bundle "list --name-only"
+      expect(out).to eq "rack"
+    end
+  end
+
   context "when no gems are in the gemfile" do
     before do
       install_gemfile <<-G