brand new round trip tool
git-svn-id: svn://svn.code.sf.net/p/fonttools/code/trunk@347 4cde692c-a291-49d1-8350-778aa11640f8
diff --git a/MetaTools/roundTrip.py b/MetaTools/roundTrip.py
new file mode 100755
index 0000000..08b7d61
--- /dev/null
+++ b/MetaTools/roundTrip.py
@@ -0,0 +1,98 @@
+#! /usr/bin/env python
+
+"""usage: ttroundtrip [options] font1 ... fontN
+
+ Dump each TT/OT font as a TTX file, compile again to TTF or OTF
+ and dump again. Then do a diff on the two TTX files. Append 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.
+
+ This tool supports some of ttdump's command line options (-i, -t
+ and -x) and they will in fact be passed to ttdump. Specifying -t
+ or -x implies ttcompile -i <originalfile> on the way back.
+
+ Normally all output from ttdump and ttcompile is suppressed,
+ -v (verbose) causes it to be shown.
+"""
+
+
+import sys
+import os
+import tempfile
+import getopt
+import traceback
+from fontTools import ttx
+
+class Error(Exception): pass
+
+
+def usage():
+ print __doc__
+ sys.exit(2)
+
+
+def roundTrip(ttFile1, options, report):
+ fn = os.path.basename(ttFile1)
+ xmlFile1 = tempfile.mktemp(".%s.ttx1" % fn)
+ ttFile2 = tempfile.mktemp(".%s" % fn)
+ xmlFile2 = tempfile.mktemp(".%s.ttx2" % fn)
+
+ try:
+ ttx.ttDump(ttFile1, xmlFile1, options)
+ if options.onlyTables or options.skipTables:
+ options.mergeFile = ttFile1
+ ttx.ttCompile(xmlFile1, ttFile2, options)
+ options.mergeFile = None
+ ttx.ttDump(ttFile2, xmlFile2, options)
+
+ diffcmd = 'diff -c2 -I ".*modified value\|checkSumAdjustment.*" "%s" "%s"' % (xmlFile1, xmlFile2)
+ output = os.popen(diffcmd, "r", 1)
+ lines = []
+ while 1:
+ line = output.readline()
+ if not line:
+ break
+ sys.stdout.write(line)
+ lines.append(line)
+ if lines:
+ report.write("=============================================================\n")
+ report.write(" \"%s\" differs after round tripping\n" % ttFile1)
+ report.write("-------------------------------------------------------------\n")
+ report.writelines(lines)
+ else:
+ print "(TTX files are the same)"
+ finally:
+ for tmpFile in (xmlFile1, ttFile2, xmlFile2):
+ if os.path.exists(tmpFile):
+ os.remove(tmpFile)
+
+
+def main(args):
+ try:
+ rawOptions, files = getopt.getopt(args, "it:x:v")
+ except getopt.GetoptError:
+ usage()
+
+ if not files:
+ usage()
+
+ report = open("report.txt", "a+")
+ options = ttx.Options(rawOptions, len(files))
+ for ttFile in files:
+ try:
+ roundTrip(ttFile, options, report)
+ except KeyboardInterrupt:
+ print "(Cancelled)"
+ except:
+ print "*** round tripping aborted ***"
+ traceback.print_exc()
+ report.write("=============================================================\n")
+ report.write(" An exception occurred while round tripping")
+ report.write(" \"%s\"\n" % ttFile)
+ traceback.print_exc(file=report)
+ report.write("-------------------------------------------------------------\n")
+ report.close()
+
+
+main(sys.argv[1:])
