Initial commit.

.gitignore

+# Ignore temp files
+*~
+
+# Ignore other junk files
+*.backup
+*.kate-swp
+*.swp
+

data.yml

+# Contains data required by the script hello.rb
+# Uses YAML format.
+
+first:
+last:

hello.rb

+#!/usr/bin/env ruby
+
+require 'optparse'
+require 'yaml'
+require 'date'
+
+class Parser
+  def self.parse_options(args)
+    options = {}
+    opt_parser = OptionParser.new do |opts|
+      opts.banner = "Greets whoever is identified by data.yml."
+      opts.separator "Will use the cowsay program, if it is installed."
+      opts.separator "Usage: hello.rb [options]"
+      opts.on("-c", "--cow COW", "Show message using cow type COW") do |c|
+        options["cow"] = c
+      end
+      opts.on("-h", "--help", "Prints this help") do
+        puts opts
+        exit
+      end
+    end
+    opt_parser.parse!(args)
+    return options
+  end
+end
+
+class Greeting
+  def self.greet
+    case DateTime.now.hour
+    when 0..11
+      "Good morning"
+    when 12..16
+      "Good afternoon"
+    else
+      "Good evening"
+    end
+  end
+end
+
+class MaybeCow
+  def self.command?(command)
+    system("which #{command} > /dev/null 2>&1")
+  end
+
+  def self.program(options)
+    primary = "/usr/games/cowsay"
+    alt     = "/usr/bin/tee"
+    if command?(primary)
+      options["cow"] ? "#{primary} -f #{options["cow"]}" : primary
+    else
+      alt
+    end
+  end
+end
+
+options = Parser.parse_options(ARGV)
+data = YAML.load_file('data.yml')
+name = 
+  if data["first"]
+    "#{data["first"]} #{data["last"]} (#{ENV["USER"]})"
+  else
+    "whoever you are"
+  end
+
+IO.popen(MaybeCow.program(options), "w") do |c|
+  c.puts "#{Greeting.greet} #{name}!"
+  c.close
+  puts
+end