Set umask to world readable before generating site

Ensure that calls to Jekyll and Compass force the umask for
those processes to be 022.  This ensures that any files in public/
will be world-readable, which is particularly important for anyone
with stricter umasks (e.g., the paranoid 077) using rsync for deploy.

This fixes #307.

Signed-off-by: Emil Sit <sit@emilsit.net>

Rakefile

@@ -50,6 +50,7 @@ desc "Generate jekyll site"
 task :generate do
   raise "### You haven't set anything up yet. First run `rake install` to set up an Octopress theme." unless File.directory?(source_dir)
   puts "## Generating Site with Jekyll"
+  File.umask(022)
   system "compass compile --css-dir #{source_dir}/stylesheets"
   system "jekyll"
 end
@@ -59,8 +60,8 @@ task :watch do
   raise "### You haven't set anything up yet. First run `rake install` to set up an Octopress theme." unless File.directory?(source_dir)
   puts "Starting to watch source with Jekyll and Compass."
   system "compass compile --css-dir #{source_dir}/stylesheets" unless File.exist?("#{source_dir}/stylesheets/screen.css")
-  jekyllPid = Process.spawn("jekyll --auto")
-  compassPid = Process.spawn("compass watch")
+  jekyllPid = Process.spawn("jekyll --auto", :umask=>022)
+  compassPid = Process.spawn("compass watch", :umask=>022)
 
   trap("INT") {
     [jekyllPid, compassPid].each { |pid| Process.kill(9, pid) rescue Errno::ESRCH }
@@ -75,8 +76,8 @@ task :preview do
   raise "### You haven't set anything up yet. First run `rake install` to set up an Octopress theme." unless File.directory?(source_dir)
   puts "Starting to watch source with Jekyll and Compass. Starting Rack on port #{server_port}"
   system "compass compile --css-dir #{source_dir}/stylesheets" unless File.exist?("#{source_dir}/stylesheets/screen.css")
-  jekyllPid = Process.spawn("jekyll --auto")
-  compassPid = Process.spawn("compass watch")
+  jekyllPid = Process.spawn("jekyll --auto", :umask=>022)
+  compassPid = Process.spawn("compass watch", :umask=>022)
   rackupPid = Process.spawn("rackup --port #{server_port}")
 
   trap("INT") {