refactored makefile

Makefile

@@ -1,32 +1,37 @@
 
-OUTPUT    := output
-SINGLE    := $(wildcard *.md)
-MULTI     := $(wildcard *.txt)
-TARGET_S  := $(SINGLE:.md=)
-TARGET_M  := $(MULTI:.txt=)
+SRC_DIR     := ./
+OUT_DIR     := ./output
 
-PANDOC_OPT = --template ./template.tex \
+SRC         := $(wildcard *.md)
+PDF         := $(addprefix $(OUT_DIR)/, $(SRC:.md=.pdf))
+
+PANDOC_OPT  := --template ./template.tex \
+               --pdf-engine pdflatex \
                --listings
 
-.PHONY: all clean out_dir test $(DIRECTORIES)
+MK_DIR      := $(OUT_DIR)
+
+
+.PHONY: all clean test
+
+
+all: $(PDF)
 
-all: $(TARGET_S) $(TARGETS_M)
 
 clean:
-	rm -f $(OUTPUT)/*
+	rm -f $(MK_DIR)
+
 
 test:
-	@echo "test test :)"
-	@echo "$(MULTI)"
+	@echo "$(SRC)" | sed 's/ /\n/g'
 
-$(TARGET_S): out_dir
-	@pandoc $(PANDOC_OPT) $@.md -o $(OUTPUT)/$@.pdf
 
-$(TARGET_M): out_dir
-	@pandoc $(PANDOC_OPT) $(shell cat $@.txt | xargs) -o $(OUTPUT)/$@.pdf
+$(OUT_DIR)/%.pdf: %.md $(MK_DIR)
+	@pandoc $(PANDOC_OPT) \
+        -o $@ \
+        $<
 
-out_dir:
-	@if [[ ! -d $(OUTPUT) ]]; then\
-		mkdir $(OUTPUT);\
-	fi
+
+$(MK_DIR):
+	mkdir -p $@