Changeset 1426 for trunk/locker

Timestamp:

Jan 18, 2010, 2:24:22 AM (15 years ago)

Author:

mitchb

Message:

Deploy enhancements to Ruby on Rails autoinstaller
This pulls in changes which provide an easy knob for users to put
their apps into production mode (which was available in earlier versions
of RoR) and cause code changes to be picked up by the fcgi automatically
without having to kill processes on all our servers (code contributed
by Greg Brockman).
(Merge of r1297:1411 from branches/locker-dev to trunk)

File:

• trunk/locker/deploy/bin/rails (modified) (2 diffs, 1 prop)

trunk/locker/deploy/bin/rails

@@ -90 +90 @@
 
 tie my @railsenv, 'Tie::File', 'config/environment.rb';
+unshift @railsenv, "# ENV['RAILS_ENV'] ||= 'production'";
+unshift @railsenv, "# Uncomment below to put Rails into production mode";
+unshift @railsenv, "";
 unshift @railsenv, "ENV['RAILS_RELATIVE_URL_ROOT'] = \"/$addrend\"";
 untie @railsenv;
@@ -111 +114 @@
 untie @railswelcome;
 
+tie my @railsfcgi, 'Tie::File', 'public/dispatch.fcgi';
+for (@railsfcgi) {
+    s/^[^#]*RailsFCGIHandler/## Commented out by scripts.mit.edu autoinstaller\n## RailsFCGIHandler/;
+}
+untie @railsfcgi;
+open RAILSFCGI, ">>public/dispatch.fcgi";
+print RAILSFCGI <<EOF;
+
+## Added by scripts.mit.edu autoinstaller to reload when app code changes
+Thread.abort_on_exception = true
+
+t1 = Thread.new do
+   RailsFCGIHandler.process!
+end
+
+t2 = Thread.new do
+   # List of directories to watch for changes before reload
+   Thread.current[:watched_dirs] = ['app', 'config', 'db', 'lib', 'public']
+   # Sample filter: /(\.rb|\.erb)\$/.  Default filter: watch all files
+   Thread.current[:watched_extensions] = //
+   # Iterations since last reload
+   Thread.current[:iterations] = 0
+
+   def modified(file)
+     begin
+       mtime = File.stat(file).mtime
+     rescue
+       false
+     else
+       if Thread.current[:iterations] == 0
+         Thread.current[:modifications][file] = mtime
+       end
+       Thread.current[:modifications][file] != mtime
+     end
+   end
+
+   # Don't symlink yourself into a loop.  Please.  Things will still work
+   # (Linux limits your symlink depth) but you will be sad
+   def modified_dir(dir)
+     Dir.new(dir).each do |file|
+       absfile = File.join(dir, file)
+       if FileTest.directory? absfile
+         next if file == '.' or file == '..'
+         return true if modified_dir(absfile)
+       else
+         return true if Thread.current[:watched_extensions] =~ absfile &&
+           modified(absfile)
+       end
+     end
+     false
+   end
+
+   def reload
+     Thread.current[:modifications] = {}
+     Thread.current[:iterations] = 0
+     RailsFCGIHandler.reload!
+   end
+
+   Thread.current[:modifications] = {}
+   # Wait until the modify time changes, then reload.
+   while true
+     reload if Thread.current[:watched_dirs].inject(false) {|z, dir| z || modified_dir(File.join(File.dirname(__FILE__), '..', dir))}
+     Thread.current[:iterations] += 1
+     sleep 1
+   end
+end
+
+t1.join
+t2.join
+## End of scripts.mit.edu autoinstaller additions
+EOF
+
 print "Your application is located in:\n";
 print "  /mit/$USER/web_scripts/$addrend/\n";