Snippets/woff2_compress: add --hmtx-trasform option; use argparse

Snippets/woff2_compress.py

@@ -2,39 +2,76 @@
 
 from __future__ import print_function, division, absolute_import
 from fontTools.misc.py23 import *
+from fontTools import configLogger
 from fontTools.ttLib import TTFont
 from fontTools.ttx import makeOutputFileName
 from fontTools.ttLib.woff2 import WOFF2FlavorData
 import sys
+import logging
+import argparse
+
+
+def woff2_compress(input_file, output_file, transform_tables=None):
+    logging.info("Processing %s => %s" % (input_file, output_file))
+
+    font = TTFont(input_file, recalcBBoxes=False, recalcTimestamp=False)
+    font.flavor = "woff2"
+
+    if transform_tables is not None:
+        font.flavorData = WOFF2FlavorData(transformedTables=transform_tables)
+
+    font.save(output_file, reorderTables=False)
 
 
 def main(args=None):
-    if args is None:
-        args = sys.argv[1:]
+    parser = argparse.ArgumentParser()
 
-    disableTransforms = False
-    if "--disable-transforms" in args:
-        disableTransforms = True
-        args.remove("--disable-transforms")
+    parser.add_argument("input_file", metavar="INPUT_FILE")
+    parser.add_argument("-o", "--output-file", default=None)
 
-    if len(args) < 1:
-        print("One argument, the input filename, must be provided.", file=sys.stderr)
-        return 1
+    transform_group = parser.add_argument_group()
+    transform_group.add_argument(
+        "--no-glyf-transform",
+        action="store_true",
+        help="Do not transform glyf (and loca) tables",
+    )
+    transform_group.add_argument(
+        "--hmtx-transform",
+        action="store_true",
+        help="Enable optional transformation for 'hmtx' table",
+    )
 
-    filename = args[0]
-    outfilename = makeOutputFileName(filename, outputDir=None, extension='.woff2')
+    logging_group = parser.add_mutually_exclusive_group(required=False)
+    logging_group.add_argument(
+        "-v", "--verbose", action="store_true", help="Run more verbosely."
+    )
+    logging_group.add_argument(
+        "-q", "--quiet", action="store_true", help="Turn verbosity off."
+    )
+    options = parser.parse_args(args)
 
-    print("Processing %s => %s" % (filename, outfilename))
+    configLogger(
+        logger=logging.getLogger(),
+        level=("DEBUG" if options.verbose else "ERROR" if options.quiet else "INFO"),
+    )
 
-    font = TTFont(filename, recalcBBoxes=False, recalcTimestamp=False)
-    font.flavor = "woff2"
+    input_file = options.input_file
 
-    if disableTransforms:
-        # an empty tuple signals that we don't want any table to be transformed
-        font.flavorData = WOFF2FlavorData(transformedTables=())
+    if options.output_file:
+        output_file = options.output_file
+    else:
+        output_file = makeOutputFileName(input_file, outputDir=None, extension=".woff2")
 
-    font.save(outfilename, reorderTables=False)
+    if options.no_glyf_transform:
+        transform_tables = set()
+    else:
+        transform_tables = {"glyf", "loca"}
+
+    if options.hmtx_transform:
+        transform_tables.add("hmtx")
+
+    woff2_compress(input_file, output_file, transform_tables)
 
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     sys.exit(main())