backtracer.rb in backtracer-0.6.1

- old
+ new
@@ -1,31 +1,37 @@
 # this one display full BT with code, at the end [no performance loss]
 require 'rbconfig'
-WINDOZE = Config::CONFIG['host_os'] =~ /mswin|mingw/
+DOZE = Config::CONFIG['host_os'] =~ /mswin|mingw/
 
 require File.dirname(__FILE__) + "/shared"
 
 at_exit {
   if $! && !$!.is_a?(SystemExit) # SystemExit's are normal, not exceptional
-    puts "\n     " + $!.inspect + ' ' + $!.to_s
-    bt2 = $!.backtrace
+    print "\n\t" unless defined?($same_line)
+    puts $!.inspect + ' ' + $!.to_s
+
+    max = 0
+    $!.backtrace.each{|bt_line| max = [bt_line.length, max].max}
+
     backtrace_with_code = $!.backtrace.map{ |bt_line|
       next if bt_line.include? 'bin/backtracer' # binary lines...
-      if WINDOZE && bt_line[1..1] == ':'
+      if DOZE && bt_line[1..1] == ':'
         
         drive, file, line, junk = bt_line.split(":")
 	#["C", "/dev/ruby/allgems/lib/allgems/GemWorker.rb", "91", "in `unpack'"]              
         file = drive + ":" + file
       else
         file, line, junk = bt_line.split(":")
       end
       line = line.to_i
       actual_line = Tracer.get_line(file, line)
-
-      "#{bt_line}\n\t#{actual_line.strip if actual_line}"
+     
+      "%-#{max + 1}s #{"\n\t" unless defined?($same_line)}%s" % [bt_line, (actual_line.strip if actual_line)]
     }.compact
     puts backtrace_with_code
-    $!.set_backtrace [] # avoid the original backtrace
+    puts # blank line
+    $!.set_backtrace [] # avoid the original backtrace being outputted--though annoyingly it does still output its #to_s...
+    
   else
     puts "(backtracer: no exception found to backtrace)" if $VERBOSE
   end
   # exit! TODO I guess do this once ours isn't *so* ugly
   # I'm not sure it's safe to do that, in case there are other at_exit's [?]