improved environment detection

and PEP8 and wording of "does not exist" message

minetestmapper-expertmm.py

@@ -3,8 +3,8 @@
 
 # This program is free software. It comes without any warranty, to
 # the extent permitted by applicable law. You can redistribute it
-# and/or modify it under the terms of the Do What ... You Want
-# To Public License, Version 2, as published by Sam Hocevar. See
+# and/or modify it under the terms of the WTFPL
+# Public License, Version 2, as published by Sam Hocevar. See
 # COPYING for more details.
 
 # Made by Jogge, modified by celeron55
@@ -135,16 +135,25 @@ usagetext = """minetestmapper.py [options]
   --region <xmin>:<xmax>,<zmin>:<zmax>
   --geometry <xmin>:<zmin>+<width>+<height>
   --drawunderground
-Color format: '#000000'"""
+Color format: '#000000'
+NOTE: colors.txt must be in same directory as
+this script or in the current working
+directory (or util directory if installed).
+"""
+
 
 def usage():
     print(usagetext)
 
+
 try:
-    opts, args = getopt.getopt(sys.argv[1:], "hi:o:", ["help", "input=",
-        "output=", "bgcolor=", "scalecolor=", "origincolor=",
-        "playercolor=", "draworigin", "drawplayers", "drawscale",
-        "drawunderground", "geometry=", "region="])
+    opts, args = getopt.getopt(sys.argv[1:],
+                               "hi:o:",
+                               ["help", "input=", "output=",
+                                "bgcolor=", "scalecolor=", "origincolor=",
+                                "playercolor=", "draworigin", "drawplayers",
+                                "drawscale", "drawunderground", "geometry=",
+                                "region="])
 except getopt.GetoptError as err:
     # print help information and exit:
     print(str(err))  # will print something like "option -a not recognized"
@@ -196,6 +205,7 @@ for o, a in opts:
         region_string = a
     else:
         assert False, "unhandled option"
+
 nonchunky_xmin = -1500
 nonchunky_xmax = 1500
 nonchunky_zmin = -1500
@@ -213,9 +223,9 @@ if geometry_string is not None:
             this_width = int(width_string)
             this_height = int(height_string)
             nonchunky_xmin = x
-            nonchunky_xmax = nonchunky_xmin + this_width - 1  # -1 since max is inclusive rect
+            nonchunky_xmax = nonchunky_xmin + this_width - 1  # inclusive rect
             nonchunky_zmin = z
-            nonchunky_zmax = nonchunky_zmin + this_height - 1  # -1 since max is inclusive rect
+            nonchunky_zmax = nonchunky_zmin + this_height - 1  # inclusive rect
             print("#geometry:")
             print("#  x:" + str(x))
             print("#  z:" + str(z))
@@ -227,11 +237,13 @@ if geometry_string is not None:
             print("  zmin:" + str(nonchunky_zmin))
             print("  zmax:" + str(nonchunky_zmax))
         else:
-            print("ERROR: (Missing coordinates in '"+geometry_string+"' for geometry) Geometry should be in the form: x:z+width+height")
+            print("ERROR: Missing coordinates in '" + geometry_string +
+                  "' for geometry (must be in the form: x:z+width+height)")
             usage()
             sys.exit(2)
     else:
-        print("ERROR: (Incorrect value '"+geometry_string+"' for geometry) Geometry should be in the form: x:z+width+height")
+        print("ERROR: Incorrect value '" + geometry_string +
+              "' for geometry (must be in the form: x:z+width+height)")
         usage()
         sys.exit(2)
 elif region_string is not None:
@@ -252,18 +264,18 @@ elif region_string is not None:
         print("  zmin:" + str(nonchunky_zmin))
         print("  zmax:" + str(nonchunky_zmax))
     else:
-        print("ERROR: (Incorrect value '"+region_string+"' for region) Region should be in the form: xmin:xmax,zmin:zmax")
+        print("ERROR: Incorrect value '" + region_string +
+              "' for region (must be in the form: xmin:xmax,zmin:zmax)")
         usage()
         sys.exit(2)
-#answer=raw_input("press enter to continue")
+
 sector_xmin = nonchunky_xmin / 16
 sector_xmax = nonchunky_xmax / 16
 sector_zmin = nonchunky_zmin / 16
 sector_zmax = nonchunky_zmax / 16
 
-
 if path is None:
-    print("Please select world path (eg. -i ../worlds/yourworld) (or use --help)")
+    print("Please select world path (-i ../worlds/yourworld) (or use --help)")
     sys.exit(1)
 
 if path[-1:] != "/" and path[-1:] != "\\":
@@ -273,30 +285,40 @@ if path[-1:] != "/" and path[-1:] != "\\":
 colors = {}
 colors_path = "colors.txt"
 
-os_name="linux"
-if (os.path.sep!="/"):
-    os_name="windows"
-
 profile_path = None
-if os_name=="windows":
+if 'USERPROFILE' in os.environ:
     profile_path = os.environ['USERPROFILE']
-else:
+elif 'HOME' in os.environ:
     profile_path = os.environ['HOME']
 
-mt_path = os.path.join( profile_path, "minetest")
-mt_util_path = os.path.join( mt_path, "util")
-abs_colors_path = os.path.join( mt_util_path, "colors.txt" )
+mt_path = None
+mt_util_path = None
+abs_colors_path = None
+
+if not os.path.isfile(colors_path):
+    colors_path = os.path.join(os.path.dirname(os.path.abspath(__file__)),
+                               "colors.txt")
 
 if not os.path.isfile(colors_path):
+    if profile_path is not None:
+        try_path = os.path.join(profile_path, "minetest")
+        if os.path.isdir(try_path):
+            mt_path = try_path
+            mt_util_path = os.path.join(mt_path, "util")
+            abs_colors_path = os.path.join(mt_util_path, "colors.txt")
+            if os.path.isfile(abs_colors_path):
                 colors_path = abs_colors_path
 
 if not os.path.isfile(colors_path):
-    print("WARNING: could not find colors.txt is current path or '"+colors_path+"'")
+    print("ERROR: could not find colors.txt")
+    usage()
+    sys.exit(1)
 
 try:
     f = file(colors_path)
 except IOError:
-    f = file(os.path.join(os.path.dirname(__file__), "colors.txt"))
+    f = file(os.path.join(os.path.dirname(os.path.abspath(__file__)),
+                          "colors.txt"))
 for line in f:
     values = string.split(line)
     if len(values) < 4:
@@ -375,7 +397,7 @@ if os.path.exists(path + "sectors"):
         zlist.append(z)
 
 if len(xlist) == 0 or len(zlist) == 0:
-    print("At this location data does not exist.")
+    print("Data does not exist at this location.")
     sys.exit(1)
 
 # Get rid of doubles
@@ -840,4 +862,3 @@ if unknown_node_ids:
     for node_id in unknown_node_ids:
         sys.stdout.write(" "+str(hex(node_id)))
     sys.stdout.write(os.linesep)
-