diff -r 792876306489 -r 4dd5bde4e777 updaterevision/updaterevision.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/updaterevision/updaterevision.py	Wed Dec 10 19:17:00 2014 +0200
@@ -0,0 +1,75 @@
+#
+#	Copyright 2014 Teemu Piippo
+#	All rights reserved.
+#
+#	Redistribution and use in source and binary forms, with or without
+#	modification, are permitted provided that the following conditions
+#	are met:
+#
+#	1. Redistributions of source code must retain the above copyright
+#	   notice, this list of conditions and the following disclaimer.
+#	2. Redistributions in binary form must reproduce the above copyright
+#	   notice, this list of conditions and the following disclaimer in the
+#	   documentation and/or other materials provided with the distribution.
+#	3. Neither the name of the copyright holder nor the names of its
+#	   contributors may be used to endorse or promote products derived from
+#	   this software without specific prior written permission.
+#
+#	THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+#	"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+#	TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+#	PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER
+#	OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+#	EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+#	PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+#	PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+#	LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+#	NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+#	SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+
+import sys
+import subprocess
+from datetime import datetime
+
+if len (sys.argv) != 2:
+    print 'usage: %s <output>' % sys.argv[0]
+    quit (1)
+
+oldrev = ''
+
+try:
+    with open (sys.argv[1]) as fp:
+        oldrev = fp.readline().replace ('\n', '').replace ('// ', '')
+except IOError:
+    pass
+
+data = subprocess.check_output (['hg', 'log', '-r.', '--template',
+    '{node|short} {branch} {date|hgdate}']).replace ('\n', '').split (' ')
+
+rev = data[0]
+branch = data[1]
+timestamp = int (data[2])
+date = datetime.utcfromtimestamp (timestamp)
+datestring = date.strftime ('%y%m%d-%H%M') if date.year >= 2000 else '000000-0000'
+
+if len(rev) > 7:
+    rev = rev[0:7]
+
+if subprocess.check_output (['hg', 'id', '-n']).replace ('\n', '')[-1] == '+':
+    rev += '+'
+
+if branch != 'default':
+    rev += '-%s' % branch
+
+if rev == oldrev:
+    print "%s is up to date at %s" % (sys.argv[1], rev)
+    quit (0)
+
+with open (sys.argv[1], 'w') as fp:
+    fp.write ('// %s\n' % rev)
+    fp.write ('#define REVISION_STRING "%s"\n' % rev)
+    fp.write ('#define REVISION_DATE "%s"\n' % datestring)
+    fp.write ('#define REVISION_DISPLAY_DATE "%s"\n' % date.strftime ('%d %b %Y'))
+    fp.write ('#define REVISION_TIME %d\n' % int (timestamp))
+    print '%s updated to %s' % (sys.argv[1], rev)