diff -r 416e8c497829 -r 9d52b119b3f5 tools/updaterevision.py
--- a/tools/updaterevision.py	Mon Jun 27 02:01:52 2022 +0300
+++ b/tools/updaterevision.py	Mon Jun 27 15:46:12 2022 +0300
@@ -33,36 +33,47 @@
 import argparse
 import outputfile
 
-def main():
+if __name__ == '__main__':
 	import subprocess
 	from datetime import datetime
 	parser = argparse.ArgumentParser(description='Writes a header file with Hg commit information')
 	parser.add_argument('--cwd', default = '.')
 	parser.add_argument('output')
 	args = parser.parse_args()
-	f = outputfile.OutputFile(args.output)
 	data = subprocess.check_output(['hg', 'log', '--cwd', args.cwd, '-r.', '--template',
-		'{node|short} {branch} {date|hgdate}']).decode().replace('\n', '').split(' ')
-
+		'{node|short} {branch} {date|hgdate} {tags}']).decode().replace('\n', '').split()
 	rev = data[0]
 	branch = data[1]
 	timestamp = int(data[2])
+	all_tags = set(data[4:])
+	try:
+		version_tag = [tag for tag in all_tags if tag.startswith('v')][0]
+	except IndexError:
+		version_tag = None
 	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', '--cwd', args.cwd, '-n']).decode().replace('\n', '').endswith('+'):
+		rev = rev[:7]
+	modified = subprocess.check_output(['hg', 'id', '--cwd', args.cwd, '-n']).decode().strip().endswith('+')
+	if modified:
 		rev += '+'
-
-	f.write('#define HG_NODE "%s"\n' % rev)
-	f.write('#define HG_BRANCH "%s"\n' % branch)
-	f.write('#define HG_DATE_VERSION "%s"\n' % datestring)
-	f.write('#define HG_DATE_STRING "%s"\n' % date.strftime('%d %b %Y'))
-	f.write('#define HG_DATE_TIME %d\n' % int(timestamp))
-	if f.save():
-		print('%s updated to %s' %(f.filename, rev))
-
-if __name__ == '__main__':
-	main()
+		# if the source tree is modified, it's not the released version
+		version_tag = None
+	if version_tag is not None:
+		# tags should be the same in released versions whether or not it's tip
+		# (though released versions shouldn't be tip because hgtags is modified
+		# to create the tag 🤔, but let's do this anyway)
+		all_tags -= {'tip'}
+	with outputfile.OutputFile(args.output, verbose = True) as f:
+		f.write(f'#define HG_NODE "{rev}"\n')
+		if branch != 'default':
+			f.write(f'#define HG_BRANCH "{branch}"\n')
+		f.write(f'#define HG_DATE_VERSION "{datestring}"\n')
+		f.write(f'#define HG_DATE_TIME {int(timestamp)}\n')
+		if all_tags:
+			f.write(f'#define HG_ALL_TAGS "{" ".join(sorted(all_tags))}"\n')
+		if version_tag:
+			f.write(f'#define HG_VERSION_TAG "{version_tag[1:]}"\n')
+		if 'tip' in all_tags:
+			f.write('#define HG_TIP\n')
+	print(f'Current Hg revision: {rev}')