* tool/file2lastrev.rb: get rid of global variables.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@23912 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,4 +1,6 @@
-Tue Jun 30 16:48:49 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+Tue Jun 30 16:53:17 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* tool/file2lastrev.rb: get rid of global variables.
 
 	* tool/compile_prelude.rb: use US-ASCII name.
 

tool/file2lastrev.rb

@@ -48,25 +48,27 @@ def get_revisions(path)
   return last, changed
 end
 
-def raise_if_conflict
+@output = nil
-  raise "you can specify only one of --changed, --revision.h and --doxygen" if $output
+def self.output=(output)
+  if @output and @output != output
+    raise "you can specify only one of --changed, --revision.h and --doxygen"
+  end
+  @output = output
 end
+@suppress_not_found = false
 
 parser = OptionParser.new {|opts|
   opts.on("--changed", "changed rev") do
-    raise_if_conflict
+    self.output = :changed
-    $output = :changed
   end
   opts.on("--revision.h") do
-    raise_if_conflict
+    self.output = :revision_h
-    $output = :revision_h
   end
   opts.on("--doxygen") do
-    raise_if_conflict
+    self.output = :doxygen
-    $output = :doxygen
   end
   opts.on("-q", "--suppress_not_found") do
-    $suppress_not_found = true
+    @suppress_not_found = true
   end
 }
 parser.parse!
@@ -75,10 +77,10 @@ parser.parse!
 begin
   last, changed = get_revisions(ARGV.shift)
 rescue VCSNotFoundError
-  raise unless $suppress_not_found
+  raise unless @suppress_not_found
 end
 
-case $output
+case @output
 when :changed, nil
   puts changed
 when :revision_h
@@ -86,5 +88,5 @@ when :revision_h
 when :doxygen
   puts "r#{changed}/r#{last}"
 else
-  raise "unknown output format `#{$output}'"
+  raise "unknown output format `#{@output}'"
 end