Implement writing output to arbitrary files including stdout.

Partially-fixes: http://sourceforge.net/p/fonttools/feature-requests/7/

git-svn-id: svn://svn.code.sf.net/p/fonttools/code/trunk@614 4cde692c-a291-49d1-8350-778aa11640f8

Doc/ttx.1

@@ -67,6 +67,11 @@ Write the output files to directory
 .Ar dir
 instead of writing every output file to the same directory as the
 corresponding input file.
+.It Fl o Ar file
+Write the output to
+.Ar file
+instead of writing it to the same directory as the
+corresponding input file. Use - to write it to stdout.
 .It Fl v
 Be verbose.  Write more messages to the standard output describing what
 is being done.

Lib/fontTools/ttx.py

@@ -15,6 +15,8 @@ usage: ttx [options] inputfile1 [... inputfileN]
     -h Help: print this message
     -d <outputfolder> Specify a directory where the output files are
        to be created.
+    -o <outputfile> Specify a file to write the output to, use - for
+       standard output.
     -v Verbose: more messages will be written to stdout about what
        is being done.
     -a allow virtual glyphs ID's on compile or decompile.
@@ -88,6 +90,7 @@ class Options:
 
 	listTables = 0
 	outputDir = None
+	outputFile = None
 	verbose = 0
 	splitTables = 0
 	disassembleInstructions = 1
@@ -110,6 +113,8 @@ class Options:
 					print "The -d option value must be an existing directory"
 					sys.exit(2)
 				self.outputDir = value
+			elif option == "-o":
+				self.outputFile = value
 			elif option == "-v":
 				self.verbose = 1
 			# dump options
@@ -242,7 +247,7 @@ def guessFileType(fileName):
 
 def parseOptions(args):
 	try:
-		rawOptions, files = getopt.getopt(args, "ld:vht:x:sim:baey:")
+		rawOptions, files = getopt.getopt(args, "ld:o:vht:x:sim:baey:")
 	except getopt.GetoptError:
 		usage()
 	
@@ -270,7 +275,10 @@ def parseOptions(args):
 			print 'Unknown file type: "%s"' % input
 			continue
 		
-		output = makeOutputFileName(input, options.outputDir, extension)
+		if options.outputFile:
+			output = options.outputFile
+		else:
+			output = makeOutputFileName(input, options.outputDir, extension)
 		jobs.append((action, input, output))
 	return jobs, options