From 9edc3a2e93f5a0a15475d087c00e6d64de8abb53 Mon Sep 17 00:00:00 2001
From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Sun, 18 Mar 2012 11:29:20 +0000
Subject: [PATCH] revid - better deps

---
 Makefile | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index 2e4d97d..88cfc3b 100644
--- a/Makefile
+++ b/Makefile
@@ -6,11 +6,15 @@ default: final.pdf
 once:		revid.inc
 		pdflatex -halt-on-error article.tex </dev/null
 
-revid.inc:	.git-revid $(SRCS) Makefile
+GITDIR:=$(addsuffix /, $(shell git rev-parse --git-dir))
+HEADREF:=$(shell git symbolic-ref HEAD 2>/dev/null)
+HEADDEPS:=$(addprefix $(GITDIR), HEAD $(HEADREF))
+
+revid.inc:	.git-revid $(SRCS) Makefile $(HEADDEPS)
 		./$< >$@.new
 		cmp $@.new $@ || mv -f $@.new $@
 
-final.pdf: $(SRCS)
+final.pdf: $(SRCS) revid.inc
 		$(MAKE) once
 		$(MAKE) once
 		$(MAKE) once
-- 
2.30.2