Generate predefined Gemfile.lock. Reason:

Gems evolve. While application generation works when a version of
Katapult is released, emerging incompatibilities between gems quickly
break the smooth generation experience. By delivering a working
Gemfile.lock, application generation will work. The user can decide
himself, if he wants to run bundle update.

Author: codener

.gitignore

@@ -4,6 +4,7 @@
 .config
 .yardoc
 Gemfile.lock
+!lib/generators/katapult/basics/templates/Gemfile.lock
 InstalledFiles
 _yardoc
 coverage

bin/katapult

@@ -74,14 +74,15 @@ when 'new'
   # Do not use `basics_command` as commit message, it contains the db password!
   util.git_commit 'rails generate katapult:basics', '--quiet'
 
-  util.pink <<-INSTRUCTIONS
+  util.pink <<-'INSTRUCTIONS'
 Application initialization done.
 
 Next steps:
 
+- Run `bundle update` if you want to use the latest versions of all gems
+- Configure public/robots.txt
 - Model your application in lib/katapult/application_model.rb and transform it
   into code by running `katapult fire`
-- Configure public/robots.txt
 - Write a README
   INSTRUCTIONS
 

features/basics.feature

@@ -25,6 +25,7 @@ Feature: Preparation of a new Rails app (basics generator)
 
     And the configured Rails version should be listed in the Gemfile.lock
     And the file "Gemfile" should contain "gem 'katapult', path: '../../..'"
+    And a file named "Gemfile.lock" should exist
 
     And the file "app/controllers/application_controller.rb" should contain:
     """

features/binary.feature

@@ -48,6 +48,7 @@ Feature: Katapult binary `katapult`
       And the output should contain "Model your application in lib/katapult/application_model.rb"
       And the output should contain "Configure public/robots.txt"
       And the output should contain "Write a README"
+      And the output should contain "Run `bundle update`"
 
     When I cd to "binary_test"
     Then the file "Gemfile" should contain "gem 'katapult'"

lib/generators/katapult/basics/basics_generator.rb

@@ -40,6 +40,7 @@ def enhance_gemfile
         # installed with a custom :path option
         @katapult = File.readlines('Gemfile').find{ |line| line =~ /^gem 'katapult'/ }
         template 'Gemfile', force: true
+        template 'Gemfile.lock', force: true
       end
 
       def bundle_install