X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ian/git?p=topbloke-formulae.git;a=blobdiff_plain;f=Makefile;h=88cfc3b873c973fdd36bab1232b5e6de80edb954;hp=0f2016e40426218384848c911c789702a98bf9d9;hb=dbc2fa88cece12d33ca5788ad5d359f77676a802;hpb=c5c1e92428e7289249f68b4ecc39cca4b629f209

diff --git a/Makefile b/Makefile
index 0f2016e..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
@@ -20,4 +24,4 @@ final.pdf: $(SRCS)
 		pdftops $*.pdf $*.ps
 
 clean:
-	rm -f *.aux *.log *.dvi *.out *.pdf *~
+	rm -f *.aux *.log *.dvi *.out *.pdf *.ps *~