From: John Ellson <ellson@research.att.com>
Date: Sun, 17 May 2015 14:57:09 +0000 (-0400)
Subject:  use time of last git commit for version time
X-Git-Tag: TRAVIS_CI_BUILD_EXPERIMENTAL~114
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=ff14e5bcf5c3fc644f616b9da066ea703c81ccf0;p=graphviz

 use time of last git commit for version time
---

diff --git a/autogen.sh b/autogen.sh
index 27db14172..764823cae 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -1,7 +1,14 @@
 #! /bin/sh
 
-# Use "now" if we can't get time of last commit
-GRAPHVIZ_VERSION_DATE=$( date -u +%Y%m%d.%H%M )
+GRAPHVIZ_VERSION_DATE=$( git log -n 1 --format=%ct )
+if test $? -eq 0; then
+    GRAPHVIZ_VERSION_DATE=$( date -u +%Y%m%d.%H%M -d @$GRAPHVIZ_VERSION_DATE )
+    echo "Version date is based on time of last commit: $GRAPHVIZ_VERSION_DATE"
+else
+    GRAPHVIZ_VERSION_DATE=$( date -u +%Y%m%d.%H%M )
+    echo "Warning: we do not appear to be running in a git clone."
+    echo "Version date is based on time now: $GRAPHVIZ_VERSION_DATE"
+fi
 
 # initialize version for a "stable" build
 cat >./version.m4 <<EOF