Mercurial > cpython-lru_cache-weakref

annotate Tools/scripts/rgrep.py @ 58689:514b56efd89a 3.1

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Merged revisions 77962 via svnmerge from svn+ssh://pythondev@svn.python.org/python/branches/py3k ................ r77962 | r.david.murray | 2010-02-04 11:41:57 -0500 (Thu, 04 Feb 2010) | 17 lines Merged revisions 77943,77959-77960 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r77943 | r.david.murray | 2010-02-03 08:36:23 -0500 (Wed, 03 Feb 2010) | 2 lines Explicitly mention the default value for formatdate's usegmt parameter. ........ r77959 | nick.coghlan | 2010-02-04 07:43:58 -0500 (Thu, 04 Feb 2010) | 1 line Issue 6760: Clarify args handling for subprocess.Popen. Patch by Chris Rebert ........ r77960 | r.david.murray | 2010-02-04 11:33:31 -0500 (Thu, 04 Feb 2010) | 2 lines Add Chris Rebert to ACKS for issue 6760 Popen doc improvements. ........ ................
author R. David Murray <rdmurray@bitdance.com>
date Thu, 04 Feb 2010 16:44:31 +0000
parents 46625e6122e9
children fcfe324663a6
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
8981
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
1 #! /usr/bin/env python
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
2
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
3 """Reverse grep.
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
4
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
5 Usage: rgrep [-i] pattern file
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
6 """
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
7
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
8 import sys
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
9 import re
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
10 import getopt
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
11
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
12 def main():
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
13 bufsize = 64*1024
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
14 reflags = 0
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
15 opts, args = getopt.getopt(sys.argv[1:], "i")
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
16 for o, a in opts:
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
17 if o == '-i':
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
18 reflags = reflags | re.IGNORECASE
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
19 if len(args) < 2:
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
20 usage("not enough arguments")
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
21 if len(args) > 2:
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
22 usage("exactly one file argument required")
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
23 pattern, filename = args
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
24 try:
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
25 prog = re.compile(pattern, reflags)
40587
6b18a095c2e7 SF patch 1631942 by Collin Winter:
Guido van Rossum <guido@python.org>
parents: 25219
diff changeset
26 except re.error as msg:
8981
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
27 usage("error in regular expression: %s" % str(msg))
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
28 try:
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
29 f = open(filename)
40587
6b18a095c2e7 SF patch 1631942 by Collin Winter:
Guido van Rossum <guido@python.org>
parents: 25219
diff changeset
30 except IOError as msg:
8981
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
31 usage("can't open %s: %s" % (repr(filename), str(msg)), 1)
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
32 f.seek(0, 2)
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
33 pos = f.tell()
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
34 leftover = None
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
35 while pos > 0:
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
36 size = min(pos, bufsize)
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
37 pos = pos - size
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
38 f.seek(pos)
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
39 buffer = f.read(size)
25219
8a7a2f1f88f0 Apply diff2.txt from SF patch http://www.python.org/sf/572113
Walter Dörwald <walter@livinglogic.de>
parents: 8981
diff changeset
40 lines = buffer.split("\n")
8981
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
41 del buffer
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
42 if leftover is None:
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
43 if not lines[-1]:
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
44 del lines[-1]
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
45 else:
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
46 lines[-1] = lines[-1] + leftover
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
47 if pos > 0:
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
48 leftover = lines[0]
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
49 del lines[0]
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
50 else:
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
51 leftover = None
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
52 lines.reverse()
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
53 for line in lines:
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
54 if prog.search(line):
42427
46625e6122e9 Convert print statements to function calls in Tools/.
Collin Winter <collinw@gmail.com>
parents: 40587
diff changeset
55 print(line)
8981
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
56
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
57 def usage(msg, code=2):
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
58 sys.stdout = sys.stderr
42427
46625e6122e9 Convert print statements to function calls in Tools/.
Collin Winter <collinw@gmail.com>
parents: 40587
diff changeset
59 print(msg)
46625e6122e9 Convert print statements to function calls in Tools/.
Collin Winter <collinw@gmail.com>
parents: 40587
diff changeset
60 print(__doc__)
8981
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
61 sys.exit(code)
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
62
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
63 if __name__ == '__main__':
0398051f8ffa New tool: reverse grep (greps from the end). Uses a fairly efficient
Guido van Rossum <guido@python.org>
parents:
diff changeset
64 main()