From 16e5a0437ffb30afcc4693afeb2ce06eb3919835 Mon Sep 17 00:00:00 2001
From: Christoph Junghans <ottxor@gentoo.org>
Date: Mon, 3 Apr 2017 17:55:10 -0600
Subject: [PATCH] set revision to 'tip' (for hg) when empty (fix #93)

---
 latexdiff-vc | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/latexdiff-vc b/latexdiff-vc
index 1fd5f2d..eb91f99 100755
--- a/latexdiff-vc
+++ b/latexdiff-vc
@@ -382,6 +382,11 @@ if ( ($vc eq "SVN" || $vc eq "CVS") && scalar(@revs)) {
   length($revs[0]) > 0 or $revs[0]="HEAD";
 }
 
+if ($vc eq "HG" && scalar(@revs)) {
+  length($revs[$#revs]) > 0 or $revs[$#revs]="tip";
+  length($revs[0]) > 0 or $revs[0]="tip";
+}
+
 ### print STDERR "DEBUG revs($#revs): " . join(":",@revs) . "\n";
 ### print STDERR "DEBUG Files($#files): $file1 " . join(":",@files) . "\n";
 print STDERR "DEBUG LDOptions($#ldoptions): " . join(":",@ldoptions) . "\n" if $debug;