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#! /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 imp
def main():
silent = 0
verbose = 0
if sys.argv[1:]:
if sys.argv[1] == '-v':
verbose = 1
elif sys.argv[1] == '-s':
silent = 1
MAGIC = imp.get_magic()
if not silent:
print('Using MAGIC word', repr(MAGIC))
for dirname in sys.path:
try:
names = os.listdir(dirname)
except os.error:
print('Cannot list directory', repr(dirname))
continue
if not silent:
print('Checking ', repr(dirname), '...')
names.sort()
for name in names:
if name[-3:] == '.py':
name = os.path.join(dirname, name)
try:
st = os.stat(name)
except os.error:
print('Cannot stat', repr(name))
continue
if verbose:
print('Check', repr(name), '...')
name_c = name + 'c'
try:
f = open(name_c, 'r')
except IOError:
print('Cannot open', repr(name_c))
continue
magic_str = f.read(4)
mtime_str = f.read(4)
f.close()
if magic_str != MAGIC:
print('Bad MAGIC word in ".pyc" file', end=' ')
print(repr(name_c))
continue
mtime = get_long(mtime_str)
if mtime == 0 or mtime == -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print('Out-of-date ".pyc" file', end=' ')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 ord(s[0]) + (ord(s[1])<<8) + (ord(s[2])<<16) + (ord(s[3])<<24)
if __name__ == '__main__':
main()
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