mercurial/version.py
author mpm@selenic.com
Fri, 24 Jun 2005 22:51:39 -0800
changeset 460 6409d9a0df43
parent 429 688d03d6997a
child 461 9ae0034f2772
child 464 50da4bb9cab6
permissions -rw-r--r--
add dirstate debugging commands -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 add dirstate debugging commands As I've played with various different merges and more recently rawcommit, I've found the following patch to be very very helpful in figuring out whether the dirstate is being left in a consistent or inconsistent state with respect to the current manifest. I attempted to deduce the invariants that were assumed by the current code, and then check it in this code. I may or may not have captured the design intent in this check; if not, I'd be very happy to hear more clearly what was intended, so that I can write tests to that expectation. Anyway, here's the patch. Not sure if it's a good idea to commit it to the mainline, or just leave it as a debugging aid. I attempted to package it so that it doesn't interfere with normal usage. Michael Fetterman (tweaked by mpm: remove -d magic) manifest hash: 869f5b5f954dc0f46ba27322359e811d5e21d71c -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.0 (GNU/Linux) iD8DBQFCvP77ywK+sNU5EO8RArmtAKCCVuI2slANzWZ26P5edtH/ixdwNwCfZLWl 5P+V+C92II3usO4YW2MULKY= =/Pv4 -----END PGP SIGNATURE-----

# Copyright (C) 2005 by Intevation GmbH
# Author(s):
# Thomas Arendsen Hein <thomas@intevation.de>
#
# This program is free software under the GNU GPL (>=v2)
# Read the file COPYING coming with the software for details.

"""
Mercurial version
"""

import os
import os.path
import re
import time

unknown_version = 'unknown'
remembered_version = False

def get_version():
    """Return version information if available."""
    try:
        from mercurial.__version__ import version
    except ImportError:
        version = unknown_version
    return version

def write_version(version):
    """Overwrite version file."""
    filename = os.path.join(os.path.dirname(__file__), '__version__.py')
    f = open(filename, 'w')
    f.write("# This file is auto-generated.\n")
    f.write("version = %r\n" % version)
    f.close()

def remember_version(version=None):
    """Store version information."""
    global remembered_version
    if not version and os.path.isdir(".hg"):
        f = os.popen("hg identify 2>/dev/null")  # use real hg installation
        ident = f.read()[:-1]
        if not f.close() and ident:
            ids = ident.split(' ', 1)
            version = ids.pop(0)
            if version[-1] == '+':
                version = version[:-1]
                modified = True
            else:
                modified = False
            if version.isalnum() and ids:
                for tag in ids[0].split('/'):
                    # is a tag is suitable as a version number?
                    if re.match(r'^(\d+\.)+[\w.-]+$', tag):
                        version = tag
                        break
            if modified:
                version += time.strftime('+%Y%m%d')
    if version:
        remembered_version = True
        write_version(version)

def forget_version():
    """Remove version information."""
    if remembered_version:
        write_version(unknown_version)