From 9837f2846a73d054cd7637ec275baa49506a0216 Mon Sep 17 00:00:00 2001
From: emaste <emaste@FreeBSD.org>
Date: Wed, 19 Oct 2016 13:19:45 +0000
Subject: MFC r306740, r307150: groff: use changelog date in man pages

r306740:

groff: use changelog date rather than file modification date in man pages

The source checkout date is not particularly relevant, and this makes
groff man pages build reproducibly.

r307150:

Avoid using 'head' in generating groff doc date

It may not be available in certain cross build cases.

Note that this is a slight change in functionality, in that now only the
first line of the source ChangeLog file is processed. This is acceptable
as groff will be retired and we won't encounter a possibly-different
ChangeLog format.
---
 gnu/usr.bin/groff/Makefile.inc | 3 ++-
 gnu/usr.bin/groff/mdate.sh     | 8 ++++++++
 2 files changed, 10 insertions(+), 1 deletion(-)
 create mode 100755 gnu/usr.bin/groff/mdate.sh

diff --git a/gnu/usr.bin/groff/Makefile.inc b/gnu/usr.bin/groff/Makefile.inc
index 24bcd98..eced62d 100644
--- a/gnu/usr.bin/groff/Makefile.inc
+++ b/gnu/usr.bin/groff/Makefile.inc
@@ -119,7 +119,7 @@ revision=`sed -e 's/^0$$//' -e 's/^[1-9].*$$/.&/' $(GROFF_DIST)/REVISION`
 	-e "s;@TMAC_MDIR@;$(tmacdir)/mm;g" \
 	-e "s;@BROKEN_SPOOLER_FLAGS@;$(BROKEN_SPOOLER_FLAGS);g" \
 	-e "s;@VERSION@;$(version)$(revision);g" \
-	-e "s;@MDATE@;`$(SHELL) ${GROFF_DIST}/mdate.sh $<`;g" \
+	-e "s;@MDATE@;$(MDATE);g" \
 	-e "s;@g@;$(g);g" \
 	-e "s;@G@;`echo $(g) | LC_ALL=C tr a-z A-Z`;g" \
 	$< >$@
@@ -141,4 +141,5 @@ TOPREL?=	..
 GROFF_DIST=	${.CURDIR}/${TOPREL}/../../../contrib/groff
 DIST_SUBDIR?=	${.CURDIR:T}
 DIST_DIR=	${GROFF_DIST}/${DIST_SUBDIR}
+MDATE!=		sh ${.CURDIR}/${TOPREL}/mdate.sh ${GROFF_DIST}/ChangeLog
 .PATH: ${DIST_DIR}
diff --git a/gnu/usr.bin/groff/mdate.sh b/gnu/usr.bin/groff/mdate.sh
new file mode 100755
index 0000000..03a4a09
--- /dev/null
+++ b/gnu/usr.bin/groff/mdate.sh
@@ -0,0 +1,8 @@
+#!/bin/sh
+# $FreeBSD$
+
+set -e
+test -r "$1"
+export LC_ALL=C
+changelog_date=$(sed -E -n '1s/^([0-9]{4}-[0-9]{2}-[0-9]{2}).*$/\1/p' "$1")
+echo $(date -j -f %Y-%m-%d +"%e %B %Y" $changelog_date)
-- 
cgit v1.1