Fix setup.py to not touch pylock.po

setup.py

@@ -1,18 +1,43 @@
 #!/usr/bin/env python3
 
 import distutils.core
+import distutils.command.build
 import distutils.command.install
-from DistUtilsExtra.command import build_extra, build_i18n
+import glob
 import os
 
 
+class build_pylock(distutils.command.build.build):
+    def run(self):
+        distutils.command.build.build.run(self)
+
+        data_files = self.distribution.data_files
+        if data_files is None:
+            # in case not data_files are defined in setup.py
+            self.distribution.data_files = data_files = []
+
+        for po_file in glob.glob("po/*.po"):
+            lang = os.path.basename(po_file[:-3])
+            mo_dir =  os.path.join("build", "mo", lang, "LC_MESSAGES")
+            mo_file = os.path.join(mo_dir, "%s.mo" % self.distribution.metadata.name)
+            if not os.path.exists(mo_dir):
+                os.makedirs(mo_dir)
+            cmd = ["msgfmt", po_file, "-o", mo_file]
+            po_mtime = os.path.getmtime(po_file)
+            mo_mtime = os.path.exists(mo_file) and os.path.getmtime(mo_file) or 0
+            if po_mtime > mo_mtime:
+                self.spawn(cmd)
+
+            targetpath = os.path.join("share/locale", lang, "LC_MESSAGES")
+            data_files.append((targetpath, (mo_file,)))
+
 class install_pylock(distutils.command.install.install):
     def run(self):
+        distutils.command.install.install.run(self)
+
         distutils.dir_util.copy_tree('etc', os.path.join(self.root, 'etc'),
                                      preserve_times=0, preserve_symlinks=1, verbose=1)
 
-        distutils.command.install.install.run(self)
-
 distutils.core.setup(
     name = 'pylock',
     version = '1',
@@ -30,8 +55,7 @@ distutils.core.setup(
     scripts = ['scripts/pylock'],
 
     cmdclass = {
-        'build': build_extra.build_extra,
+        'build': build_pylock,
-        'build_i18n': build_i18n.build_i18n,
         'install': install_pylock,
     },