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"""scons.Builder
XXX
"""
__revision__ = "Builder.py __REVISION__ __DATE__ __DEVELOPER__"
import os
import types
from scons.Node.FS import Dir, File, lookup
class Builder:
"""Base class for Builders, objects that create output
nodes (files) from input nodes (files).
"""
def __init__(self, name = None,
action = None,
input_suffix = None,
output_suffix = None,
node_class = File):
self.name = name
self.action = Action(action)
self.insuffix = input_suffix
self.outsuffix = output_suffix
self.node_class = node_class
if not self.insuffix is None and self.insuffix[0] != '.':
self.insuffix = '.' + self.insuffix
if not self.outsuffix is None and self.outsuffix[0] != '.':
self.outsuffix = '.' + self.outsuffix
def __cmp__(self, other):
return cmp(self.__dict__, other.__dict__)
def __call__(self, target = None, source = None):
node = lookup(self.node_class, target)
node.builder_set(self)
node.sources = source # XXX REACHING INTO ANOTHER OBJECT
return node
def execute(self, **kw):
"""Execute a builder's action to create an output object.
"""
apply(self.action.execute, (), kw)
def Action(act):
"""A factory for action objects."""
if type(act) == types.FunctionType:
return FunctionAction(act)
elif type(act) == types.StringType:
return CommandAction(act)
else:
return None
class ActionBase:
"""Base class for actions that create output objects.
We currently expect Actions will only be accessible through
Builder objects, so they don't yet merit their own module."""
def __cmp__(self, other):
return cmp(self.__dict__, other.__dict__)
def show(self, string):
print string
class CommandAction(ActionBase):
"""Class for command-execution actions."""
def __init__(self, string):
self.command = string
def execute(self, **kw):
cmd = self.command % kw
self.show(cmd)
os.system(cmd)
class FunctionAction(ActionBase):
"""Class for Python function actions."""
def __init__(self, function):
self.function = function
def execute(self, **kw):
# XXX: WHAT SHOULD WE PRINT HERE?
self.function(kw)
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