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[3.13] gh-121151: argparse: Fix wrapping of long usage text of arguments inside a mutually exclusive groups (GH-121159) (#122777)

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gh-121151: argparse: Fix wrapping of long usage text of arguments inside a mutually exclusive groups (GH-121159)
(cherry picked from commit 013a092975)

Co-authored-by: Ali Hamdan <ali.hamdan.dev@gmail.com>
This commit is contained in:
Miss Islington (bot) 2024-09-02 12:55:16 +02:00 • committed by GitHub
parent 8c01b34268
commit f1a6d2254f
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3 changed files with 36 additions and 7 deletions
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15
Lib/argparse.py
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@ -447,15 +447,24 @@ class HelpFormatter(object):
parts.append(part)
# group mutually exclusive actions
inserted_separators_indices = set()
for start, end in sorted(inserts, reverse=True):
group = inserts[start, end]
group_parts = [item for item in parts[start:end] if item is not None]
group_size = len(group_parts)
if group.required:
open, close = "()" if len(group_parts) > 1 else ("", "")
open, close = "()" if group_size > 1 else ("", "")
else:
open, close = "[]"
parts[start] = open + " | ".join(group_parts) + close
for i in range(start + 1, end):
group_parts[0] = open + group_parts[0]
group_parts[-1] = group_parts[-1] + close
for i, part in enumerate(group_parts[:-1], start=start):
# insert a separator if not already done in a nested group
if i not in inserted_separators_indices:
parts[i] = part + ' |'
inserted_separators_indices.add(i)
parts[start + group_size - 1] = group_parts[-1]
for i in range(start + group_size, end):
parts[i] = None
# return the usage parts