build: Update Python scripts to work with Python 3.

Python 3 makes a number of changes to the language and breaks backward
compatibility with Python 2 in some places.  This change updates the
Python scripts used in the build system to work with Python 3,
although the updated scripts still run in Python 2 as well.  Most of
the changes are minor; the biggest changes are to the palette /
colormap generation scripts.

Signed-off-by: Simon Howard <fraggle@gmail.com>

scripts/extract-pnames.py

@@ -48,26 +48,26 @@ def parse_texture_file():
 
 			patches[name] = True
 
-        print "; autogenerated patch list\n"
+	print("; autogenerated patch list\n")
 
 	for name in sorted(patches.keys()):
-		print name
+		print(name)
 
 # Generate a full list of textures from the files in the
 # patches/ directory
 
 def list_all_textures():
-        print "; autogenerated patch list\n"
+	print("; autogenerated patch list\n")
 
 	for filename in sorted(glob.glob("patches/*.gif")):
 		base = os.path.basename(filename)
 		patch_name = base[0:-4]
-		print patch_name
+		print(patch_name)
 
 if len(sys.argv) == 1:
 	parse_texture_file()
 elif sys.argv[1] == "-a":
 	list_all_textures()
 else:
-        print "Usage: extract-pnames.pl [-a]"
+	print("Usage: extract-pnames.py [-a]")
 

scripts/simplecpp

@@ -84,7 +84,7 @@ def parse_stream(stream):
 		raise Exception("Mismatched #if in '%s'" % stream.name)
 
 def parse_file(filename):
-	f = file(filename)
+	f = open(filename)
 
 	try:
 		parse_stream(f)
@@ -209,7 +209,7 @@ def read_block(stream, ignore):
 				func(arg)
 		else:
 			if not ignore:
-				print line
+				print(line)
 
 parse_cmdline()
 parse_stream(sys.stdin)

scripts/wadinfo-builder.py

@@ -73,9 +73,9 @@ def find_file(section, name):
 # Warning header displayed at the top of an output file.
 
 def print_warning_header():
-	print "; This file is automatically generated."
-	print "; Do not edit it directly!"
-	print
+	print("; This file is automatically generated.")
+	print("; Do not edit it directly!")
+	print("")
 
 # Remove comments beginning with "#" or ";"
 
@@ -171,7 +171,7 @@ def parse_stream(stream):
 			if match:
 				line = parse_assignment(section, line, match)
 
-		print line
+		print(line)
 
 # Parse command line options: