From 51ae3ad8646d0ee74f3613a5bed5cf4ed440f6e1 Mon Sep 17 00:00:00 2001
From: Daniel Borchmann <daniel@algebra20.de>
Date: Sun, 19 Aug 2018 16:08:47 +0200
Subject: [PATCH] Store intermediate files in separate build directory

---
 .gitignore |  1 +
 Makefile   | 24 +++++++++++++++---------
 2 files changed, 16 insertions(+), 9 deletions(-)

diff --git a/.gitignore b/.gitignore
index 8a53aa6..dc31fc3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,3 +7,4 @@
 *.synctex.gz
 /presentations/*.pdf
 /presentations/auto
+/presentations/build/
diff --git a/Makefile b/Makefile
index 4638c74..e090685 100644
--- a/Makefile
+++ b/Makefile
@@ -1,17 +1,23 @@
 PRESENTATIONS=$(patsubst %.tex, %.pdf, $(wildcard presentations/*.tex))
+BUILD_DIR=build
+BUILD_DECKS=$(subst presentations, presentations/$(BUILD_DIR), $(wildcard presentations/content/*))
+LATEX=pdflatex -output-directory $(BUILD_DIR)
 
 all: ${PRESENTATIONS}
 
 clean:
-	rm -f presentations/*.log
-	rm -f presentations/*.out
-	rm -f presentations/*.nav
-	rm -f presentations/*.aux
-	rm -f presentations/*.snm
-	rm -f presentations/*.toc
+	rm -fr presentations/$(BUILD_DIR)
+
+distclean: clean
+	rm -f presentations/*.pdf
+
+.SECONDARY: $(BUILD_DECKS)
+presentations/$(BUILD_DIR)/%:
+	mkdir -p $@
 
 .ONESHELL:
-presentations/%.pdf : presentations/%.tex
+presentations/%.pdf : presentations/%.tex $(BUILD_DECKS)
 	cd presentations
-	pdflatex $(notdir $<)
-	pdflatex $(notdir $<)
+	$(LATEX) $(notdir $<)
+	$(LATEX) $(notdir $<)
+	mv $(BUILD_DIR)/$*.pdf .