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"""SCons.Sig
The Signature package for the scons software construction utility.
"""
#
# __COPYRIGHT__
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
# KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
# WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#
__revision__ = "__FILE__ __REVISION__ __DATE__ __DEVELOPER__"
try:
import MD5
default_module = MD5
except ImportError:
import TimeStamp
default_module = TimeStamp
# XXX We should move max_drift into Node/FS.py,
# since it's really something about files.
default_max_drift = 2*24*60*60
class SConsignEntry:
"""The old SConsignEntry format.
We keep this around to handle conversions from old .sconsign files."""
timestamp = None
bsig = None
csig = None
implicit = None
def convert_to_sconsign(self):
pass
def convert_from_sconsign(self, dir, name):
pass
class Calculator:
"""
Encapsulates signature calculations and .sconsign file generating
for the build engine.
"""
def __init__(self, module=default_module, max_drift=default_max_drift):
"""
Initialize the calculator.
module - the signature module to use for signature calculations
max_drift - the maximum system clock drift used to determine when to
cache content signatures. A negative value means to never cache
content signatures. (defaults to 2 days)
"""
self.module = module
self.max_drift = max_drift
default_calc = Calculator()
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