Add warnings for different versions of bundler; add specs

Remove space

2 files changed, 20 insertions, 3 deletions

diff --git a/lib/bundler/cli/install.rb b/lib/bundler/cli/install.rb
index a087ab42..6e5d03ad 100644
--- a/lib/bundler/cli/install.rb
+++ b/lib/bundler/cli/install.rb
@@ -11,6 +11,8 @@ module Bundler
 
       warn_if_root
 
+      warn_if_outdated
+
       [:with, :without].each do |option|
         if options[option]
           options[option] = options[option].join(":").tr(" ", ":").split(":")
@@ -114,6 +116,19 @@ module Bundler
         "application for all non-root users on this machine.", :wrap => true
     end
 
+    def warn_if_outdated
+      return if ENV["BUNDLE_POSTIT_TRAMPOLINING_VERSION"].nil?
+      installed_version = Gem::Version.new(ENV["BUNDLE_POSTIT_TRAMPOLINING_VERSION"])
+      running_version = Gem::Version.new(Bundler::VERSION)
+      if Bundler.settings[:warned_version].nil? || running_version > Gem::Version.new(Bundler.settings[:warned_version])
+        Bundler.settings[:warned_version] = running_version
+        Bundler.ui.warn "You're running Bundler #{installed_version} but this " \
+          "project uses #{running_version}. To update, run `bundle update " \
+          "--bundler`. You won't see this message again unless you upgrade " \
+          "to a newer version of Bundler.", :wrap => true
+      end
+    end
+
     def confirm_without_groups
       return unless Bundler.settings.without.any?
       require "bundler/cli/common"
diff --git a/lib/bundler/postit_trampoline.rb b/lib/bundler/postit_trampoline.rb
index 90d5d97f..643822f6 100644
--- a/lib/bundler/postit_trampoline.rb
+++ b/lib/bundler/postit_trampoline.rb
@@ -49,9 +49,11 @@ rescue LoadError, NameError
   nil
 end
 
-if installed_version.to_s != running_version.to_s
-  puts <<-WARN
-You're running Bundler #{installed_version.to_s} but this project uses #{running_version.to_s}. To update, run `bundle update --bundler`. You won't see this message again unless you upgrade to a newer version of Bundler.\n
+if Gem::Version.new(running_version) >= Gem::Version.new("1.13.0.pre.1")
+  ENV["BUNDLE_POSTIT_TRAMPOLINING_VERSION"] = installed_version.to_s
+else
+  puts <<-WARN.strip
+You're running Bundler #{installed_version} but this project uses #{running_version}. To update, run `bundle update --bundler`.\n
   WARN
 end