better log and error handling

loved2itunes.rb

@@ -27,22 +27,22 @@
 PVERSION = "Version 1.1, 09/05/2009"
 $KCODE = "u"
 
-require 'rubygems'
+begin
+  require 'rubygems'
 
-gem 'nokogiri', '>= 1.3.3'
-gem 'rb-appscript', '>= 0.5.3'
+  gem 'nokogiri', '>= 1.3.3'
+  gem 'rb-appscript', '>= 0.5.3'
 
-require 'nokogiri'
-require 'appscript'
-require 'open-uri'
+  require 'nokogiri'
+  require 'appscript'
+  require 'open-uri'
 
-username      = ARGV[0]
-playlist_name = ARGV[1] || 'Loved'
-api_key       = ARGV[2] || API_KEY
+  username      = ARGV[0]
+  playlist_name = ARGV[1] || 'Loved'
+  api_key       = ARGV[2] || API_KEY
 
-begin
-  raise("Please specify a username") if username.nil?
-  p "lastfm2itunes #{PVERSION} running on Ruby #{RUBY_VERSION} (#{RUBY_PLATFORM}), initializing..."
+  raise("please specify a username") if username.nil?
+  p "loved2itunes: #{PVERSION} running on Ruby #{RUBY_VERSION} (#{RUBY_PLATFORM}), initializing..."
   url = "http://ws.audioscrobbler.com/2.0/?method=user.getlovedtracks&user=#{URI.escape(username.downcase)}&api_key=#{api_key}&limit=0"
   doc = Nokogiri::XML(open(url))
   # XPath selection.
@@ -58,22 +58,24 @@
   # Reset playlist.
   playlist.tracks.get.each{ |tr| tr.delete } if playlist.tracks.get.size.to_i > 0
 
-  p "Found #{loved_tracks.size} loved tracks, importing..."
+  p "loved2itunes: found #{loved_tracks.size} loved tracks, importing..."
   counter = 0
   loved_tracks.each do |loved_track|
     # Grab the name of the loved track.
     title = loved_track.search('name')[0].inner_html.to_s
     # Get a reference to the existing track, it may be more robust in future.
     track_ref = iTunes.library_playlists[1].tracks[title]
     # Finally add the track to our playlist.
-     if track_ref.exists
-       iTunes.add(track_ref.location.get, :to => playlist)
-       counter += 1
-     else
-       p "Track not found, skipped: #{title}"
-     end
+    if track_ref.exists
+      iTunes.add(track_ref.location.get, :to => playlist)
+      counter += 1
+    else
+      p "loved2itunes: track not found, skipping #{title}"
+    end
   end
   p "#{counter}/#{loved_tracks.size} tracks imported into '#{playlist_name}' playlist."
 rescue Exception => e
-  puts "Something was wrong: #{e.message}"
+  puts "loved2itunes: something went wrong, the error message is: #{e.message}"
+ensure
+  puts "loved2itunes: execution finished."
 end