moved rails binary to rails gem, so rubygems can find specific versions of rails [#4382 state:resolved]

Signed-off-by: wycats <wycats@gmail.com>

1 files changed, 30 insertions, 0 deletions

diff --git a/railties/lib/rails/cli.rb b/railties/lib/rails/cli.rb
new file mode 100644
index 0000000000..173f122445
--- /dev/null
+++ b/railties/lib/rails/cli.rb
@@ -0,0 +1,30 @@
+require 'rbconfig'
+
+module Rails
+  module ScriptRailsLoader
+    RUBY = File.join(*RbConfig::CONFIG.values_at("bindir", "ruby_install_name")) + RbConfig::CONFIG["EXEEXT"]
+    SCRIPT_RAILS = File.join('script', 'rails')
+
+    def self.exec_script_rails!
+      cwd = Dir.pwd
+      exec RUBY, SCRIPT_RAILS, *ARGV if File.exists?(SCRIPT_RAILS)
+      Dir.chdir("..") do
+        # Recurse in a chdir block: if the search fails we want to be sure
+        # the application is generated in the original working directory.
+        exec_script_rails! unless cwd == Dir.pwd
+      end
+    rescue SystemCallError
+      # could not chdir, no problem just return
+    end
+  end
+end
+
+Rails::ScriptRailsLoader.exec_script_rails!
+
+railties_path = File.expand_path('../../lib', __FILE__)
+$:.unshift(railties_path) if File.directory?(railties_path) && !$:.include?(railties_path)
+
+require 'rails/ruby_version_check'
+Signal.trap("INT") { puts; exit }
+
+require 'rails/commands/application'