The sad realization that STL import/export is not good enough to cache keyblanks

Makefile

@@ -1,13 +1,12 @@
 # Makefile for keygen
 
 # Executables
-SCAD = OPENSCADPATH=src:build openscad
+SCAD = openscad
 POLY = PYTHONPATH=/usr/share/inkscape/extensions bin/paths2openscad.py
 
-SCAD_DIR = src
+SCAD_DIR = scad
 SVG_DIR = resources
-POLY_DIR = build
-STL_DIR = build
+POLY_DIR = scad
 JSON_DIR = build
 
 # Files to include
@@ -17,9 +16,6 @@ SCAD_SRC  = $(SCAD_DIR)/schlage.scad
 # Generated polygon files
 POLY_OBJ = $(patsubst $(SVG_DIR)/%.svg,$(POLY_DIR)/%.gen.scad,$(SVG_SRC))
 
-# Generated STL
-STL_OBJ = # populated in .d files
-
 # Generated JSON files
 JSON_OBJ = $(patsubst $(SCAD_DIR)/%.scad,$(JSON_DIR)/%.json,$(SCAD_SRC))
 
@@ -27,19 +23,13 @@ POLYFLAGS  =
 SCADFLAGS  = 
 
 # Targets
-all: stl $(JSON_DIR)/keys.json
+all: $(JSON_DIR)/keys.json poly
 poly: $(POLY_OBJ)
-$(STL_DIR)/%.d: $(SCAD_DIR)/%.scad
-	bin/parse.py $< $(STL_DIR)/$*.d $(JSON_DIR)/$*.json
 $(JSON_DIR)/%.json: $(SCAD_DIR)/%.scad
-	bin/parse.py $< $(STL_DIR)/$*.d $(JSON_DIR)/$*.json
+	bin/parse.py $< $@
 $(POLY_DIR)/%.gen.scad: $(SVG_DIR)/%.svg
 	$(POLY) $(POLYFLAGS) --fname $@ $<
 $(JSON_DIR)/keys.json: $(JSON_OBJ)
 	bin/json_merge.py $^ >$(JSON_DIR)/keys.json
 clean:
-	-rm -f $(POLY_DIR)/*.gen.scad $(STL_DIR)/*.stl $(STL_DIR)/*.d $(JSON_DIR)/*.json
-
-include $(patsubst $(SCAD_DIR)/%.scad,$(STL_DIR)/%.d,$(SCAD_SRC))
-
-stl: $(STL_OBJ)
+	-rm -f $(POLY_DIR)/*.gen.scad $(JSON_DIR)/*.json