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closes bpo-40385: Remove Tools/scripts/checkpyc.py (GH-19709) 

This is one of the few files that has intimate knowledge of the pyc file
format. Since it lacks tests it tends to become outdated fairly quickly.
At present it has been broken since the introduction of PEP 552.
This commit is contained in:
Ammar Askar 2020-04-24 21:33:59 -07:00 committed by GitHub
parent 0e80b561d4
commit f82807746d
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3 changed files with 2 additions and 70 deletions
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2
Misc/NEWS.d/next/Tools-Demos/2020-04-24-21-08-19.bpo-40385.nWIQdq.rst Normal file
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@ -0,0 +1,2 @@
Removed the checkpyc.py tool. Please see compileall without force mode as a
potential alternative.

1
Tools/scripts/README
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@ -7,7 +7,6 @@ abitype.py Converts a C file to use the PEP 384 type definition A
analyze_dxp.py Analyzes the result of sys.getdxp()
byext.py Print lines/words/chars stats of files by extension
byteyears.py Print product of a file's size and age
checkpyc.py Check presence and validity of ".pyc" files
cleanfuture.py Fix redundant Python __future__ statements
combinerefs.py A helper for analyzing PYTHONDUMPREFS output
copytime.py Copy one file's atime and mtime to another

69
Tools/scripts/checkpyc.py
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@ -1,69 +0,0 @@
#! /usr/bin/env python3
# Check that all ".pyc" files exist and are up-to-date
# Uses module 'os'
import sys
import os
from stat import ST_MTIME
import importlib.util
# PEP 3147 compatibility (PYC Repository Directories)
cache_from_source = (importlib.util.cache_from_source if sys.implementation.cache_tag
else lambda path: path + 'c')
def main():
if len(sys.argv) > 1:
verbose = (sys.argv[1] == '-v')
silent = (sys.argv[1] == '-s')
else:
verbose = silent = False
MAGIC = importlib.util.MAGIC_NUMBER
if not silent:
print('Using MAGIC word', repr(MAGIC))
for dirname in sys.path:
try:
names = os.listdir(dirname)
except OSError:
print('Cannot list directory', repr(dirname))
continue
if not silent:
print('Checking ', repr(dirname), '...')
for name in sorted(names):
if name.endswith('.py'):
name = os.path.join(dirname, name)
try:
st = os.stat(name)
except OSError:
print('Cannot stat', repr(name))
continue
if verbose:
print('Check', repr(name), '...')
name_c = cache_from_source(name)
try:
with open(name_c, 'rb') as f:
magic_str = f.read(4)
mtime_str = f.read(4)
except IOError:
print('Cannot open', repr(name_c))
continue
if magic_str != MAGIC:
print('Bad MAGIC word in ".pyc" file', end=' ')
print(repr(name_c))
continue
mtime = get_long(mtime_str)
if mtime in {0, -1}:
print('Bad ".pyc" file', repr(name_c))
elif mtime != st[ST_MTIME]:
print('Out-of-date ".pyc" file', end=' ')
print(repr(name_c))
def get_long(s):
if len(s) != 4:
return -1
return s[0] + (s[1] << 8) + (s[2] << 16) + (s[3] << 24)
if __name__ == '__main__':
main()