From f6856745487307f3eebe7fc12ea175014f9d2d4e Mon Sep 17 00:00:00 2001
From: Daniel Borchmann <daniel@algebra20.de>
Date: Sun, 19 Aug 2018 16:46:01 +0200
Subject: [PATCH] Makefile how has dynamic dependencies for each presentation

The dependencies are read from each LaTeX file by searching for calls to
\includedeck.
---
 Makefile | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index 08f9f18..767e248 100644
--- a/Makefile
+++ b/Makefile
@@ -15,9 +15,14 @@ distclean: clean
 presentations/$(BUILD_DIR)/%:
 	mkdir -p $@
 
+define presentation_dependencies
+	$(shell cat $(1) | perl -ne '/includedeck\{(.*)\}/ && print "presentations/content/", $$1, ".tex "')
+endef
+
 define PRESENTATION_template
 .ONESHELL: $(1)
-$(1): $(subst .pdf,.tex,$(1)) $(BUILD_DECKS)
+$(1): $(subst .pdf,.tex,$(1)) $(call presentation_dependencies,$(subst .pdf,.tex,$(1)))
+	echo $$^
 	cd presentations
 	$(LATEX) $$(notdir $$<)
 	$(LATEX) $$(notdir $$<)