diffoscope/main.py

@@ -25,6 +25,7 @@ import sys
 import json
 import signal
 import logging
+import textwrap
 import argparse
 import traceback
 
@@ -428,15 +429,17 @@ def create_parser():
         parser.epilog = (
             'File renaming detection based on fuzzy-matching is currently '
             'disabled. It can be enabled by installing the "tlsh" module '
-            'available at https://github.com/trendmicro/tlsh'
+            'available from https://github.com/trendmicro/tlsh or in the '
+            'python3-tlsh package.'
         )
     if argcomplete:
         argcomplete.autocomplete(parser)
     elif '_ARGCOMPLETE' in os.environ:
         logger.error(
             'Argument completion requested but the "argcomplete" module is '
-            'not installed. It can be obtained at '
-            'https://pypi.python.org/pypi/argcomplete'
+            'not installed. It can be obtained from '
+            'https://pypi.python.org/pypi/argcomplete or in the '
+            'python3-argcomplete package.'
         )
         sys.exit(1)
 
@@ -467,10 +470,29 @@ class HelpFormatter(argparse.HelpFormatter):
         if not set(sys.argv) & {'--help', '-h'}:
             return val
 
+        def append(title, content, indent=24, max_width=78):
+            nonlocal val
+            wrapped = textwrap.fill(content, max_width - indent)
+            val += '\n{}:\n{}\n'.format(
+                title, textwrap.indent(wrapped, ' ' * indent)
+            )
+
         descriptions = list(sorted(ComparatorManager().get_descriptions()))
-        val = '{}\n\nfile formats supported:\n{}{} and {}.\n'.format(
-            val, ' ' * 24, ', '.join(descriptions[:-1]), descriptions[-1]
+        append(
+            'file formats supported',
+            '{} and {}.\n'.format(
+                ', '.join(descriptions[:-1]), descriptions[-1]
+            ),
         )
+
+        append('diffoscope homepage', '<https://diffoscope.org/>')
+
+        append(
+            'bugs/issues',
+            '<https://salsa.debian.org/reproducible-builds/diffoscope/issues>',
+            max_width=sys.maxsize,
+        )
+
         return val