first step of changing the command line usage to something more

sensible: it is now possible to do batches, as in
  ./ttDump.py *.ttf
This is not b/w compatible. (The new -d option is not yet implemented)


git-svn-id: svn://svn.code.sf.net/p/fonttools/code/trunk@148 4cde692c-a291-49d1-8350-778aa11640f8

ttDump.py

@@ -1,11 +1,8 @@
 #! /usr/bin/env python
 
 """\
-usage: %s [-hvis] [-t <table>] [-x <table>] TrueType-file [TTX-output-file]
-    Dump a TrueType font as a TTX file (an XML-based text format). If the 
-    TTX-output-file argument is omitted, the out put file name will be 
-    constructed from the input file name, like so: *.ttf becomes *.ttx. 
-    Either way, existing files will be overwritten without warning!
+usage: %s [-hvisf] [-t <table>] [-x <table>] [-d <output-dir>] TrueType-file(s) 
+    Dump TrueType fonts as TTX files (an XML-based text format).
 
     Options:
     -h help: print this message
@@ -20,9 +17,10 @@ usage: %s [-hvis] [-t <table>] [-x <table>] TrueType-file [TTX-output-file]
        directory will be constructed from the input filename (by
        dropping the extension) or can be specified by the optional
        TTX-output-file argument.
+    -f force overwriting existing files.
     -t <table> specify a table to dump. Multiple -t options
        are allowed. When no -t option is specified, all tables
-       will be dumped
+       will be dumped.
     -x <table> specify a table to exclude from the dump. Multiple
        -x options are allowed. -t and -x are mutually exclusive.
 """
@@ -30,11 +28,12 @@ usage: %s [-hvis] [-t <table>] [-x <table>] TrueType-file [TTX-output-file]
 import sys, os, getopt
 from fontTools import ttLib
 
-options, args = getopt.getopt(sys.argv[1:], "hvist:x:")
+options, args = getopt.getopt(sys.argv[1:], "hvisft:x:")
 
 verbose = 0
 splitTables = 0
 disassembleInstructions = 0
+forceOverwrite = 0
 tables = []
 skipTables = []
 for option, value in options:
@@ -54,6 +53,8 @@ for option, value in options:
 		skipTables.append(value)
 	elif option == "-v":
 		verbose = 1
+	elif option == "-f":
+		forceOverwrite = 1
 	elif option == "-h":
 		print __doc__ % sys.argv[0]
 		sys.exit(0)
@@ -66,19 +67,22 @@ if tables and skipTables:
 	print "-t and -x options are mutually exlusive"
 	sys.exit(2)
 
-if len(args) == 1:
-	ttPath = args[0]
+if not args:
+	print __doc__ % sys.argv[0]
+	sys.exit(2)
+
+for ttPath in args:
 	path, ext = os.path.splitext(ttPath)
 	if splitTables:
 		xmlPath = path
 	else:
-		xmlPath = path + '.ttx'
-elif len(args) == 2:
-	ttPath, xmlPath = args
-else:
-	print __doc__ % sys.argv[0]
-	sys.exit(2)
-
+		xmlPath = path + ".ttx"
+		if not forceOverwrite and os.path.exists(xmlPath):
+			answer = raw_input('Overwrite "%s"? ' % xmlPath)
+			if not answer[:1] in ("Y", "y"):
+				print "skipped."
+				continue
+	print 'Dumping "%s" to "%s"...' % (ttPath, xmlPath)
 	tt = ttLib.TTFont(ttPath, 0, verbose=verbose)
 	tt.saveXML(xmlPath, tables=tables, skipTables=skipTables, 
 		splitTables=splitTables, disassembleInstructions=disassembleInstructions)