Bump the version to 0.9

* The viewer now sends `SIGHUP` to the main process when it exists
* The main process signal handler kills the viewer and terminates the
  notifier/main event loop when receiving `SIGINT`/`SIGTERM`/`SIGQUIT`
* The main process signal handler just terminates the notifier/main
  event loop when receiving `SIGHUP`
* Clean just after the notifier/main loop finishes

rubberin

@@ -70,10 +70,8 @@ def compile(infile, mode)
   params = ARGV.join(" ")
   err_file = infile.with_extname("err")
 
-  _ret = system "rubber --inplace #{mode_opt} #{params} #{infile} 2> #{err_file}"
+  system "rubber --inplace #{mode_opt} #{params} #{infile} 2> #{err_file}"
   File.open(err_file) { |file| puts file.read }
-  # Remove the output save file if compile was succesful.
-  # clean(infile) if ret
 end
 
 # Start the right viewer based on the mode.
@@ -109,7 +107,7 @@ end
 
 ## Initialisation
 PROGRAM = File.basename($PROGRAM_NAME).freeze
-VERSION = "0.8".freeze
+VERSION = "0.9".freeze
 
 # Parse the command line options.
 # Determine the compile mode from the options.
@@ -128,8 +126,10 @@ opts.each do |opt, _arg|
   when "--ps"
     mode = :ps
   when "--pdf"
-    mode = if mode == :ps then :pspdf
-           else :pdf
+    mode = if mode == :ps
+             :pspdf
+           else
+             :pdf
            end
   when "--version"
     puts "#{PROGRAM} #{VERSION}"
@@ -172,18 +172,9 @@ viewer_pid =
     view(infile, mode)
     # If xdvi/evince exits, this program should exit too.
     puts "#{PROGRAM}: viewer exited, so will I!"
-    Process.kill("TERM", pid)
+    Process.kill("HUP", pid)
   end
 
-# Handle signals.
-["INT", "TERM", "QUIT"].each do |sig|
-  Signal.trap(sig) do
-    Process.kill(sig, viewer_pid)
-    clean(infile)
-    exit
-  end
-end
-
 ## Main event loop
 
 # Add input file with dependancies to the watch list and start event loop.
@@ -196,11 +187,25 @@ dirs.each do |dir|
     file_path = (dir + ev.name).to_s
     next unless files.include? file_path
 
-    puts "I: file #{ev.name} modified, compiling #{infile}..."
+    puts "#{PROGRAM}: file #{ev.name} modified, compiling #{infile}..."
     compile(infile, mode)
     reload(infile, mode)
     puts
   end
 end
 
+# Handle signals during the main event loop.
+["INT", "TERM", "QUIT"].each do |sig|
+  Signal.trap(sig) do
+    puts "#{PROGRAM}: caught signal #{sig}, stopping the viewer..."
+    Process.kill(sig, viewer_pid)
+    notifier.stop
+  end
+end
+Signal.trap("HUP") { notifier.stop }
+
+# Run the main event loop.
 notifier.run
+
+# Clean before finishing!
+clean(infile)