fixnotice.py

#! /usr/bin/env python

"""(Ostensibly) fix copyright notices in files.

Actually, this script will simply replace a block of text in a file from one
string to another. It will only do this once though, i.e. not globally
throughout the file. It writes a backup file and then does an os.rename()
dance for atomicity.

Usage: fixnotices.py [options] [filenames]
Options:
 -h / --help
 Print this message and exit

 --oldnotice=file
 Use the notice in the file as the old (to be replaced) string, instead
 of the hard coded value in the script.

 --newnotice=file
 Use the notice in the file as the new (replacement) string, instead of
 the hard coded value in the script.

 --dry-run
 Don't actually make the changes, but print out the list of files that
 would change. When used with -v, a status will be printed for every
 file.

 -v / --verbose
 Print a message for every file looked at, indicating whether the file
 is changed or not.
"""

OLD_NOTICE="""/***********************************************************
Copyright (c) 2000, BeOpen.com.
Copyright (c) 1995-2000, Corporation for National Research Initiatives.
Copyright (c) 1990-1995, Stichting Mathematisch Centrum.
All rights reserved.

See the file "Misc/COPYRIGHT" for information on usage and
redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES.
******************************************************************/
"""
importos
importsys
importgetopt

NEW_NOTICE=""
DRYRUN=0
VERBOSE=0


defusage(code, msg=''):
print__doc__%globals()
ifmsg:
printmsg
sys.exit(code)


defmain():
globalDRYRUN, OLD_NOTICE, NEW_NOTICE, VERBOSE
try:
opts, args=getopt.getopt(sys.argv[1:], 'hv',
 ['help', 'oldnotice=', 'newnotice=',
'dry-run', 'verbose'])
exceptgetopt.error, msg:
usage(1, msg)

foropt, arginopts:
ifoptin ('-h', '--help'):
usage(0)
elifoptin ('-v', '--verbose'):
VERBOSE=1
elifopt=='--dry-run':
DRYRUN=1
elifopt=='--oldnotice':
fp=open(arg)
OLD_NOTICE=fp.read()
fp.close()
elifopt=='--newnotice':
fp=open(arg)
NEW_NOTICE=fp.read()
fp.close()

forarginargs:
process(arg)


defprocess(file):
f=open(file)
data=f.read()
f.close()
i=data.find(OLD_NOTICE)
ifi<0:
ifVERBOSE:
print'no change:', file
return
elifDRYRUNorVERBOSE:
print' change:', file
ifDRYRUN:
# Don't actually change the file
return
data=data[:i] +NEW_NOTICE+data[i+len(OLD_NOTICE):]
new=file+".new"
backup=file+".bak"
f=open(new, "w")
f.write(data)
f.close()
os.rename(file, backup)
os.rename(new, file)


if__name__=='__main__':
main()