test script: batch roundtripper

git-svn-id: svn://svn.code.sf.net/p/fonttools/code/trunk@261 4cde692c-a291-49d1-8350-778aa11640f8

Tools/ttroundtrip

@@ -0,0 +1,71 @@
+#! /usr/bin/env python
+
+"""ttroundtrip font1 ... fontN
+Dump each font as TTX, compile again to TTF or OTF and dump again.
+Then do a diff on the two TTX files. Log problems and diffs to a
+file called "report.txt" in the current directory. This is only
+for testing FontTools/TTX, the resulting files are deleted
+afterwards."""
+
+
+import sys
+import os
+import tempfile
+
+
+report = open("report.txt", "w")
+
+
+class Error(Exception): pass
+
+
+def doCommand(cmd, verbose=1, okresult=None):
+	print "--> ", cmd
+	f = os.popen(cmd)
+	lines = []
+	for line in f:
+		if verbose:
+			sys.stdout.write(line)
+		lines.append(line)
+	result = os.wait()[1] >> 8
+	if result and result <> okresult:
+		raise Error, result
+	return "".join(lines)
+
+
+if not sys.argv[1:]:
+	print __doc__
+else:
+	for ttFile in sys.argv[1:]:
+		print "--- roundtripping %s ---" % ttFile
+		fn = os.path.basename(ttFile)
+		xmlFile1 = tempfile.mktemp(".%s.ttx1" % fn)
+		ttFile2 = tempfile.mktemp(".%s" % fn)
+		xmlFile2 = tempfile.mktemp(".%s.ttx2" % fn)
+		
+		try:
+			cmd = 'ttdump -i -f "%s" "%s"' % (ttFile, xmlFile1)
+			doCommand(cmd, 0)
+			cmd = 'ttcompile -f "%s" "%s"' % (xmlFile1, ttFile2)
+			doCommand(cmd, 0)
+			cmd = 'ttdump -i -f "%s" "%s"' % (ttFile2, xmlFile2)
+			doCommand(cmd, 0)
+			cmd = 'diff -c2 -I ".*modified value\|checkSumAdjustment.*" "%s" "%s"' % (xmlFile1, xmlFile2)
+			diff = doCommand(cmd, 0, okresult=1)
+			if diff:
+				report.write("=============================================================\n")
+				report.write("%s\n" % xmlFile1)
+				report.write("%s\n" % xmlFile2)
+				report.write("-------------------------------------------------------------\n")
+				report.write(diff)
+				print diff
+			print "--- done ---"
+		except Error, why:
+			report.write("=============================================================\n")
+			report.write("%s\n" % ttFile)
+			report.write("*** round tripping aborted (code %s) ***\n" % why)
+			report.write("-------------------------------------------------------------\n")
+			print "*** round tripping aborted (code %s) ***" % why
+		for tmpFile in (xmlFile1, ttFile2, xmlFile2):
+			if os.path.exists(tmpFile):
+				os.remove(tmpFile)