revid - include

[topbloke-formulae.git] / Makefile

diff --git a/Makefile b/Makefile
index 8bd84b3ea7214db1a1719fad188214b3a10cbfd9..0f2016e40426218384848c911c789702a98bf9d9 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -3,9 +3,13 @@ SRCS := $(wildcard *.tex)
 
 default: final.pdf
 
-once:
+once:          revid.inc
                pdflatex -halt-on-error article.tex </dev/null
 
+revid.inc:     .git-revid $(SRCS) Makefile
+               ./$< >$@.new
+               cmp $@.new $@ || mv -f $@.new $@
+
 final.pdf: $(SRCS)
                $(MAKE) once
                $(MAKE) once