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"""SCons.Util
Various utility functions go here.
"""
__revision__ = "__FILE__ __REVISION__ __DATE__ __DEVELOPER__"
import types
import string
import SCons.Node.FS
def scons_str2nodes(arg, fs=SCons.Node.FS.default_fs):
"""This function converts a string or list into a list of Node instances.
It follows the rules outlined in the SCons design document by accepting
any of the following inputs:
- A single string containing names separated by spaces. These will be
split apart at the spaces.
- A single Node instance,
- A list containingg either strings or Node instances. Any strings
in the list are not split at spaces.
In all cases, the function returns a list of Node instances."""
narg = arg
if type(arg) is types.StringType:
narg = string.split(arg)
elif type(arg) is not types.ListType:
narg = [arg]
nodes = []
for v in narg:
if type(v) is types.StringType:
nodes.append(fs.File(v))
# Do we enforce the following restriction? Maybe, but it
# also restricts what we can do for allowing people to
# use the engine with alternate Node implementations...
# Perhaps this should be split in two, with the SCons.Node
# logic in a wrapper somewhere under SCons.Node, and the
# string-parsing logic here...?
#elif not issubclass(v.__class__, SCons.Node.Node):
# raise TypeError
else:
nodes.append(v)
return nodes
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