add keygen.py

Makefile

@@ -1,7 +1,6 @@
 # Makefile for keygen
 
 # Executables
-SCAD = openscad
 POLY = PYTHONPATH=/usr/share/inkscape/extensions bin/paths2openscad.py
 
 SCAD_DIR = scad
@@ -20,7 +19,6 @@ POLY_OBJ = $(patsubst $(SVG_DIR)/%.svg,$(POLY_DIR)/%.gen.scad,$(SVG_SRC))
 JSON_OBJ = $(patsubst $(SCAD_DIR)/%.scad,$(JSON_DIR)/%.json,$(SCAD_SRC))
 
 POLYFLAGS  = 
-SCADFLAGS  = 
 
 # Targets
 all: $(JSON_DIR)/keys.json poly

bin/keygen.py

@@ -0,0 +1,37 @@
+#!/usr/bin/env python3
+
+import argparse
+import os
+import string
+import sys
+import subprocess
+
+parser = argparse.ArgumentParser(description='Generates keys', epilog='All remaining arguments are passed to OpenSCAD.')
+parser.add_argument("filename",
+                    help="OpenSCAD source file for the key")
+parser.add_argument("-b", "--bitting", dest='bitting',
+                    help="Key bitting")
+parser.add_argument("-u", "--outline", dest='outline',
+                    help="Key blank outline")
+parser.add_argument("-w", "--warding", dest='warding',
+                    help="Key warding")
+parser.add_argument("-o", "--output", dest='output', default="a.stl",
+                    help="Output file (defaults to a.stl)")
+
+(args, remaining) = parser.parse_known_args()
+
+def escape(s):
+    return s.translate(str.maketrans({'"':  '\\"',
+                                      '\\': '\\\\'}));
+
+scad = os.environ.get("SCAD", "openscad")
+opts = []
+if args.bitting is not None:
+    opts += ["-D", 'bitting="{}"'.format(escape(args.bitting))]
+if args.outline is not None:
+    opts += ["-D", 'outline="{}"'.format(escape(args.outline))]
+if args.warding is not None:
+    opts += ["-D", 'warding="{}"'.format(escape(args.warding))]
+
+r = subprocess.call([scad, args.filename, "-o", args.output] + opts + remaining)
+sys.exit(r)