From d2964dda42f601c514d3e822dc5efd75ef456a40 Mon Sep 17 00:00:00 2001
From: Sergey Poznyakoff <gray@gnu.org>
Date: Tue, 6 Jan 2015 09:36:00 +0200
Subject: Build ChangeLog.

* Makefile.am (ChangeLog): New goal.
* git2chg.awk: New file (from grecs).
---
 Makefile.am | 10 +++++++-
 git2chg.awk | 82 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 91 insertions(+), 1 deletion(-)
 create mode 100644 git2chg.awk

diff --git a/Makefile.am b/Makefile.am
index 2c075fc..2e4dd7e 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1,5 +1,5 @@
 # This file is part of Ellinika project.
-# Copyright (C) 2004, 2007, 2008, 2010 Sergey Poznyakoff
+# Copyright (C) 2004, 2007, 2008, 2010, 2015 Sergey Poznyakoff
 #
 # Ellinika is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -48,3 +48,11 @@ install-html:
 	done
 
 install-data-local: install-html
+
+.PHONY: ChangeLog
+ChangeLog:
+	$(AM_V_GEN)if test -d .git; then                                  \
+		git log --pretty='format:%ct  %an  <%ae>%n%n%s%n%n%b%n' | \
+		awk -f $(top_srcdir)/git2chg.awk                          \
+                    -v append=$(top_srcdir)/ChangeLog.svn > ChangeLog;    \
+        fi
diff --git a/git2chg.awk b/git2chg.awk
new file mode 100644
index 0000000..76881b5
--- /dev/null
+++ b/git2chg.awk
@@ -0,0 +1,82 @@
+# This file is part of grecs
+# Copyright (C) 2007, 2009-2015 Sergey Poznyakoff
+#
+# Grecs is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+#
+# Grecs 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 General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Grecs.  If not, see <http://www.gnu.org/licenses/>.
+
+BEGIN {
+  if (since)
+    split(since,since_a,"-")
+}
+
+function timeok(t,   a) {
+	if (!since)
+		return 1
+	split(t,a,"-")
+	if (a[1] < since_a[1])
+		return 0
+	if (a[1] > since_a[1])
+		return 1
+	if (a[2] < since_a[2])
+		return 0
+	if (a[2] > since_a[2])
+		return 1
+	return a[3] > since_a[3]
+}
+      
+/^[0-9]+ .* +<[^>]+>/ {
+	s = strftime("%F", $1)
+	if (!timeok(s))
+	  exit
+	sub(/^[0-9]+ +/,"")
+	if (s == datestr && author == $0)
+		next
+	datestr = s
+	author = $0
+	if (runlen) { runlen = 0; print "" }
+	printf("%s  %s\n", datestr, author)
+	next
+}
+/^Signed-off-by:/ { next }
+/^<unknown>$/ { next }
+NF==0 {
+	runlen++
+	next
+}
+{ if (runlen) { runlen = 0; print "" }
+  print "\t" $0 }
+
+END {
+	if (append) {
+		print ""
+		init = 1
+		while ((getline < append) > 0) {
+			if (init) {
+				if (match($0, /^#/))
+					continue;
+				else
+					init = 0
+			}
+			if (match($0, /^Local *Variables:/))
+				break
+			print
+		}
+	}
+	print "\f"
+	# Make sure Emacs won't recognize this line:
+	print "Local", "Variables:"
+	print "mode: change-log"
+	print "version-control: never"
+	print "buffer-read-only: t"
+	print "End:"
+}
-- 
cgit v1.2.1