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|
"""SCons.Builder
XXX
"""
#
# Copyright (c) 2001 Steven Knight
#
# 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__"
import os
import SCons.Node.FS
import SCons.Util
import string
import types
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_factory = SCons.Node.FS.default_fs.File):
self.name = name
self.action = Action(action)
self.insuffix = input_suffix
self.outsuffix = output_suffix
self.node_factory = node_factory
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, env, target = None, source = None):
tlist = SCons.Util.scons_str2nodes(target, self.node_factory)
slist = SCons.Util.scons_str2nodes(source, self.node_factory)
for t in tlist:
t.builder_set(self)
t.env_set(env)
t.derived = 1
t.add_source(slist)
if len(tlist) == 1:
tlist = tlist[0]
return tlist
def execute(self, **kw):
"""Execute a builder's action to create an output object.
"""
return apply(self.action.execute, (), kw)
class BuilderProxy:
"""This base class serves as a proxy to a builder object,
exposing the same interface, but just forwarding calls to
the underlying object."""
def __init__(self, builder):
self.subject = builder
def __call__(self, env, target = None, source = None):
return self.subject.__call__(env, target, source)
def execute(self, **kw):
return apply(self.subject.execute, (), kw)
def __cmp__(self, other):
return cmp(self.__dict__, other.__dict__)
def __getattr__(self, name):
assert 'subject' in self.__dict__.keys(), \
"You must call __init__() on the BuilderProxy base."
return getattr(self.subject, name)
class TargetNamingBuilder(BuilderProxy):
"""This is a simple Builder Proxy that decorates the names
of a Builder's targets prior to passing them to the underlying
Builder. You can use this to simplify the syntax of a target
file. For instance, you might want to call a Library builder
with a target of "foo" and expect to get "libfoo.a" back."""
def __init__(self, builder, prefix='', suffix=''):
"""
builder - The underlying Builder object
prefix - text to prepend to target names (may contain
environment variables)
suffix - text to append to target names (may contain
environment variables)
"""
BuilderProxy.__init__(self, builder)
self.prefix=prefix
self.suffix=suffix
def __call__(self, env, target = None, source = None):
tlist = SCons.Util.scons_str2nodes(target,
self.subject.node_factory)
tlist_decorated = []
for tnode in tlist:
path, fn = os.path.split(tnode.path)
tlist_decorated.append(self.subject.
node_factory(os.path.join(path,
env.subst(self.prefix) +
fn +
env.subst(self.suffix))))
return self.subject.__call__(env, target=tlist_decorated, source=source)
class MultiStepBuilder(Builder):
"""This is a builder subclass that can build targets in
multiple steps according to the suffixes of the source files.
Given one or more "subordinate" builders in its constructor,
this class will apply those builders to any files matching
the builder's input_suffix, using a file of the same name
as the source, but with input_suffix changed to output_suffix.
The targets of these builders then become sources for this
builder.
"""
def __init__(self, name = None,
action = None,
input_suffix = None,
output_suffix = None,
node_factory = SCons.Node.FS.default_fs.File,
builders = []):
Builder.__init__(self, name, action, input_suffix, output_suffix,
node_factory)
self.builder_dict = {}
for bld in builders:
if bld.insuffix and bld.outsuffix:
self.builder_dict[bld.insuffix] = bld
def __call__(self, env, target = None, source = None):
slist = SCons.Util.scons_str2nodes(source, self.node_factory)
final_sources = []
for snode in slist:
path, ext = os.path.splitext(snode.path)
if self.builder_dict.has_key(ext):
bld = self.builder_dict[ext]
tgt = bld(env,
target=[ path+bld.outsuffix, ],
source=snode)
if not type(tgt) is types.ListType:
final_sources.append(tgt)
else:
final_sources.extend(tgt)
else:
final_sources.append(snode)
return Builder.__call__(self, env, target=target,
source=final_sources)
print_actions = 1;
execute_actions = 1;
def Action(act):
"""A factory for action objects."""
if type(act) == types.StringType:
l = string.split(act, "\n")
if len(l) > 1:
act = l
if callable(act):
return FunctionAction(act)
elif type(act) == types.StringType:
return CommandAction(act)
elif type(act) == types.ListType:
return ListAction(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
if print_actions:
self.show(cmd)
ret = 0
if execute_actions:
pid = os.fork()
if not pid:
# Child process.
args = string.split(cmd)
try:
ENV = kw['ENV']
except:
import SCons.Defaults
ENV = SCons.Defaults.ENV
os.execvpe(args[0], args, ENV)
else:
# Parent process.
pid, stat = os.waitpid(pid, 0)
ret = stat >> 8
return ret
class FunctionAction(ActionBase):
"""Class for Python function actions."""
def __init__(self, function):
self.function = function
def execute(self, **kw):
# if print_actions:
# XXX: WHAT SHOULD WE PRINT HERE?
if execute_actions:
return self.function(kw)
class ListAction(ActionBase):
"""Class for lists of other actions."""
def __init__(self, list):
self.list = map(lambda x: Action(x), list)
def execute(self, **kw):
for l in self.list:
r = apply(l.execute, (), kw)
if r != 0:
return r
return 0
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