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gh-80744: do not read .pdbrc twice when cwd == $home #136816

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Merged
gaogaotiantian merged 10 commits into from
Dec 21, 2025
+30 −7
Merged

gh-80744: do not read .pdbrc twice when cwd == $home #136816

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d4c6872
gh-80744: do not read .pdbrc twice when cwd == $home
saucoide Jul 19, 2025
53613ef
simplify path comparison
saucoide Jul 23, 2025
64b7a1a
Merge branch 'python:main' into pdbrc-repeat
saucoide Jul 23, 2025
623d54d
rename test
saucoide Jul 24, 2025
b8bb7a9
simplify asserts
saucoide Jul 24, 2025
00f7bef
Merge branch 'python:main' into pdbrc-repeat
saucoide Dec 20, 2025
e85c181
📜🤖 Added by blurb_it.
blurb-it[bot] Dec 20, 2025
04b788f
reuse os.path calls
saucoide Dec 20, 2025
4058d33
rst'ing
saucoide Dec 20, 2025
d3d79f8
rename rcFile to rcfile
saucoide Dec 21, 2025
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19 changes: 12 additions & 7 deletions Lib/pdb.py
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Original file line number Diff line number Diff line change
Expand Up @@ -391,17 +391,22 @@ def __init__(self, completekey='tab', stdin=None, stdout=None, skip=None,
# Read ~/.pdbrc and ./.pdbrc
self.rcLines = []
if readrc:
home_rcfile = os.path.expanduser("~/.pdbrc")
local_rcfile = os.path.abspath(".pdbrc")

try:
with open(os.path.expanduser('~/.pdbrc'), encoding='utf-8') as rcFile:
self.rcLines.extend(rcFile)
except OSError:
pass
try:
with open(".pdbrc", encoding='utf-8') as rcFile:
self.rcLines.extend(rcFile)
with open(home_rcfile, encoding='utf-8') as rcfile:
self.rcLines.extend(rcfile)
except OSError:
pass

if local_rcfile != home_rcfile:
try:
with open(local_rcfile, encoding='utf-8') as rcfile:
self.rcLines.extend(rcfile)
except OSError:
pass

self.commands = {} # associates a command list to breakpoint numbers
self.commands_defining = False # True while in the process of defining
# a command list
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17 changes: 17 additions & 0 deletions Lib/test/test_pdb.py
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Expand Up @@ -4050,6 +4050,23 @@ def test_readrc_homedir(self):
f.write("invalid")
self.assertEqual(pdb.Pdb().rcLines[0], "invalid")

def test_readrc_current_dir(self):
with os_helper.temp_cwd() as cwd:
rc_path = os.path.join(cwd, ".pdbrc")
with open(rc_path, "w") as f:
f.write("invalid")
self.assertEqual(pdb.Pdb().rcLines[-1], "invalid")

def test_readrc_cwd_is_home(self):
with os_helper.EnvironmentVarGuard() as env:
env.unset("HOME")
with os_helper.temp_cwd() as cwd, patch("os.path.expanduser"):
rc_path = os.path.join(cwd, ".pdbrc")
os.path.expanduser.return_value = rc_path
with open(rc_path, "w") as f:
f.write("invalid")
self.assertEqual(pdb.Pdb().rcLines, ["invalid"])

def test_header(self):
stdout = StringIO()
header = 'Nobody expects... blah, blah, blah'
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1 change: 1 addition & 0 deletions Misc/NEWS.d/next/Library/2025-12-20-16-35-42.gh-issue-80744.X4pZ2N.rst
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@@ -0,0 +1 @@
Fix issue where ``pdb`` would read a ``.pdbrc`` twice if launched from the home directory
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