From f9d95f812b53fcb365522babe39d518b01a7b624 Mon Sep 17 00:00:00 2001
From: Trygve Laugstøl <trygvis@inamo.no>
Date: Sat, 21 Apr 2018 14:20:40 +0200
Subject: wip

---
 Makefile | 17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

(limited to 'Makefile')

diff --git a/Makefile b/Makefile
index 2f8da55..5761bbb 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 P=what-is-iot
 # Madrid Pittsburgh boxes
-SLIDE_THEME=boxes
+SLIDE_THEME?=boxes
 PDFS=$(P)-text.pdf $(P)-slides.pdf
 HTMLS=$(P)-reveal.html
 
@@ -49,10 +49,10 @@ $(P).md: Makefile
 %-text.pdf: %.beamer.md
 	$(RUN_PANDOC_TEXT) -o $@ $<
 
-%-slides.pdf: %.beamer.md
+%-slides.pdf: %.beamer.md .var/SLIDE_THEME
 	$(RUN_PANDOC_BEAMER) -o $@ $<
 
-%-slides.tex: %.beamer.md
+%-slides.tex: %.beamer.md .var/SLIDE_THEME
 	$(RUN_PANDOC_BEAMER) -o $@ $<
 
 %.revealjs.md: %.md
@@ -66,6 +66,17 @@ images/%.pdf: images/%.tex | images/pp-template Makefile
 	xelatex -output-directory=images $(patsubst %.tex,%-full.tex,$<)
 	mv $(patsubst %.pdf,%-full.pdf,$@) $@
 
+
+VARS=SLIDE_THEME
+
+define refresh =
+.var/$(1)::
+	@mkdir -p .var
+	@./refresh $$@ $(1) $($(1))
+endef
+
+$(foreach var,$(VARS),$(eval $(call refresh,$(var))))
+
 # Dependencies
 $(P).md: images/IP-Header_eng.tex
 $(P).md: images/ip-header.pdf
-- 
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