Script for replacing strings in Java files

Uses a file in keys.pot format:
    - msgid: String to substitute
    - msgstr: New string

FEA: ItEr76S04BugFixing

scripts/replace-keys.rb

@@ -0,0 +1,84 @@
+#!/usr/bin/ruby -w
+# encoding: UTF-8
+
+# Copyright (C) 2012 Diego Pino García <dpino@igalia.com>
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor,
+# Boston, MA  02110-1301, USA.
+
+# Reads a files in keys.pot format and replaces msgid for msgstr in
+# list of files marked with '#: '
+#
+# It doesn't work if msgid contains escaped characters
+# Strings with several lines should be rewritten as one line only
+
+
+require 'pp'
+
+def readfile(filename)
+    entries = Array.new
+    entry = Hash.new
+    files = Hash.new
+
+    file = File.new(filename, "r")
+    while (line = file.gets)
+        line = line.strip
+        if (/^msgstr "(.*?)"/.match(line))
+            if (!$1.empty?)
+                entry["msgstr"] = $1
+                entry["files"] = files.keys
+                entries.push(entry)
+
+                entry = Hash.new
+                files = Hash.new
+            end
+        elsif (/^msgid "(.*?)"/.match(line))
+            if (!$1.empty?)
+                entry["msgid"] = $1
+            end
+        elsif (/^#: (.*)/.match(line))
+            if (!$1.empty?)
+                parts = $1.split(":")
+                key = parts[0]
+                files[key] = ""
+            end
+        end
+    end
+    file.close
+
+    return entries
+end
+
+def print_entries(entries)
+    entries.each { |entry|
+        puts "msgid: #{entry['msgid']}"
+        puts "msgstr: #{entry['msgstr']}"
+        puts "---\n"
+    }
+end
+
+filename = "keys.pot";
+
+entries = readfile(filename)
+# print_entries(entries)
+
+entries.each { |entry|
+    entry["files"].each { |filename|
+        filename = "../#{filename}"
+        content = File.read(filename)
+        content = content.gsub(entry["msgid"], entry["msgstr"])
+        File.open(filename, "w") { |file| file.puts content}
+    }
+}