Read the data files from the same path where the script resides.

lslopt/lslparse.py

@@ -21,6 +21,7 @@
 # TODO: Add info to be able to propagate error position to the source.
 
 from lslcommon import Key, Vector, Quaternion
+import lslcommon
 import lslfuncs
 import sys, re
 from base64 import b64encode
@@ -2326,7 +2327,7 @@ list lazy_list_set(list L, integer i, list v)
         parse_num_re = re.compile(r'^\s*(-?(?=[0-9]|\.[0-9])[0-9]*((?:\.[0-9]*)?(?:[Ee][+-]?[0-9]+)?))\s*$')
         parse_str_re = re.compile(ur'^"((?:[^"\\]|\\.)*)"$')
 
-        f = open('builtins.txt', 'rb')
+        f = open(lslcommon.DataPath + 'builtins.txt', 'rb')
         try:
             while True:
                 line = f.readline()
@@ -2443,7 +2444,7 @@ list lazy_list_set(list L, integer i, list v)
             f.close()
 
         # Load the side-effect-free table as well.
-        f = open('seftable.txt', 'rb')
+        f = open(lslcommon.DataPath + 'seftable.txt', 'rb')
         try:
             while True:
                 line = f.readline()

main.py

@@ -23,6 +23,8 @@ from lslopt.lslparse import parser,EParse
 from lslopt.lsloutput import outscript
 from lslopt.lsloptimizer import optimizer
 import sys
+import os
+import lslopt.lslcommon
 
 def main():
     if len(sys.argv) < 2:
@@ -129,6 +131,10 @@ Options (+ means active by default, - means inactive by default):
         'optsigns','optfloats','constfold','dcr'
         ))
 
+    # If it's good to append the basename to it, it's good to append the
+    # auxiliary files' names to it.
+    lslopt.lslcommon.DataPath = __file__[:-len(os.path.basename(__file__))]
+
     if sys.argv[1] == '-O':
         if len(sys.argv) < 4:
             sys.stderr.write('Command line: Not enough parameters\n')