# HG changeset patch
# User Franz Glasner <fzglas.hg@dom66.de>
# Date 1607079955 -3600
# Node ID 5a6ed622846cbd07e514b6e8dac201e8e1ceb3b8
# Parent  5510a39a2d0442a1ef8a774c53271b76e3863ad0
Add comman line switches for reading in binary and text mode

diff -r 5510a39a2d04 -r 5a6ed622846c shasum.py
--- a/shasum.py	Fri Dec 04 11:41:25 2020 +0100
+++ b/shasum.py	Fri Dec 04 12:05:55 2020 +0100
@@ -23,17 +23,23 @@
 
 
 def main(argv=None):
-    if argv is None:
-        argv = sys.argv[1:]
-
     aparser = argparse.ArgumentParser(
         description="Python implementation of shasum",
         fromfile_prefix_chars='@')
     aparser.add_argument(
+        "--binary", "-b", action="store_false", dest="text_mode", default=False,
+        help="read in binary mode (default)")
+    aparser.add_argument(
+        "--text", "-t", action="store_true", dest="text_mode", default=False,
+        help="read in text mode (not yet supported)")
+    aparser.add_argument(
         "files", nargs="*", metavar="FILE")
 
     opts = aparser.parse_args(args=argv)
 
+    if opts.text_mode:
+        print("ERROR: text mode not supported", file=sys.stderr)
+        sys.exit(78)   # :manpage:`sysexits(3)` EX_CONFIG
     if not opts.files:
         opts.files.append("-")
     for fn in opts.files: