build-sys: move python helpers to tools directory

Note that make-man-rules.py is missing in EXTRA_DIST=, this patch
fixes this mistake too.

1 files changed, 41 insertions, 0 deletions

diff --git a/tools/xml_helper.py b/tools/xml_helper.py
new file mode 100644
index 0000000000..08e226fa21
--- /dev/null
+++ b/tools/xml_helper.py
@@ -0,0 +1,41 @@
+#  -*- Mode: python; coding: utf-8; indent-tabs-mode: nil -*- */
+#
+#  This file is part of systemd.
+#
+#  Copyright 2012-2013 Zbigniew Jędrzejewski-Szmek
+#
+#  systemd is free software; you can redistribute it and/or modify it
+#  under the terms of the GNU Lesser General Public License as published by
+#  the Free Software Foundation; either version 2.1 of the License, or
+#  (at your option) any later version.
+#
+#  systemd 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
+#  Lesser General Public License for more details.
+#
+#  You should have received a copy of the GNU Lesser General Public License
+#  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+
+try:
+    from lxml import etree as tree
+
+    class CustomResolver(tree.Resolver):
+        def resolve(self, url, id, context):
+            if 'custom-entities.ent' in url:
+                return self.resolve_filename('man/custom-entities.ent', context)
+
+    _parser = tree.XMLParser()
+    _parser.resolvers.add(CustomResolver())
+    xml_parse = lambda page: tree.parse(page, _parser)
+    xml_print = lambda xml: tree.tostring(xml, pretty_print=True,
+                                          encoding='utf-8')
+except ImportError:
+    import xml.etree.ElementTree as tree
+    import re as _re
+    import io as _io
+
+    def xml_parse(page):
+        s = _re.sub(b'&[a-zA-Z0-9_]+;', b'', open(page, 'rb').read())
+        return tree.parse(_io.BytesIO(s))
+    xml_print = lambda xml: tree.tostring(xml, encoding='utf-8')