Simplify/correct finding the hg executable (fixes issue644)
Simply use find_exe('hg') as the default value for $HG and require to manually
set it if you have special requirements.
While the default will not always be 100% correct (i.e. the identical hg
version) for many users it is and for the others the hg executable found in
the PATH should do most things correctly.
Developers or other users with multiple installs can set $HG or run something
like util.set_hgexecutable in their shell or python scripts.
Additionally util.hgexecutable() is now available so extensions can access
the value with a public interface, too.
# Copyright (C) 2005, 2006 by Intevation GmbH
# Author(s):
# Thomas Arendsen Hein <thomas@intevation.de>
#
# This program is free software under the GNU GPL (>=v2)
# Read the file COPYING coming with the software for details.
"""
Mercurial version
"""
import os
import os.path
import re
import time
import util
unknown_version = 'unknown'
remembered_version = False
def get_version(doreload=False):
"""Return version information if available."""
try:
import mercurial.__version__
if doreload:
reload(mercurial.__version__)
version = mercurial.__version__.version
except ImportError:
version = unknown_version
return version
def write_version(version):
"""Overwrite version file."""
if version == get_version():
return
directory = os.path.dirname(__file__)
for suffix in ['py', 'pyc', 'pyo']:
try:
os.unlink(os.path.join(directory, '__version__.%s' % suffix))
except OSError:
pass
f = open(os.path.join(directory, '__version__.py'), 'w')
f.write("# This file is auto-generated.\n")
f.write("version = %r\n" % version)
f.close()
# reload the file we've just written
get_version(True)
def remember_version(version=None):
"""Store version information."""
global remembered_version
if not version and os.path.isdir(".hg"):
f = os.popen("hg identify 2> %s" % util.nulldev) # use real hg installation
ident = f.read()[:-1]
if not f.close() and ident:
ids = ident.split(' ', 1)
version = ids.pop(0)
if version[-1] == '+':
version = version[:-1]
modified = True
else:
modified = False
if version.isalnum() and ids:
for tag in ids[0].split('/'):
# is a tag is suitable as a version number?
if re.match(r'^(\d+\.)+[\w.-]+$', 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)