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authorLuca Falavigna <dktrkranz@debian.org>2010-01-02 20:31:28 +0100
committerLuca Falavigna <dktrkranz@debian.org>2010-01-02 20:31:28 +0100
commitd4ced36437871acd01f2ed12b1899d1969b5492f (patch)
tree25ca9dae17a0b768409dce20de86749ec157e0f5 /engine/SCons/Node/Python.py
parenta26d8475c55ab30f5940ba815235e6bb0036a6de (diff)
parent9b73d2781acfc322319eb5c59b30f2dfa0fea977 (diff)
Merge commit 'upstream/1.2.0.d20091224'
Diffstat (limited to 'engine/SCons/Node/Python.py')
-rw-r--r--engine/SCons/Node/Python.py128
1 files changed, 128 insertions, 0 deletions
diff --git a/engine/SCons/Node/Python.py b/engine/SCons/Node/Python.py
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+++ b/engine/SCons/Node/Python.py
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+"""scons.Node.Python
+
+Python nodes.
+
+"""
+
+#
+# Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 The SCons Foundation
+#
+# 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__ = "src/engine/SCons/Node/Python.py 4577 2009/12/27 19:43:56 scons"
+
+import SCons.Node
+
+class ValueNodeInfo(SCons.Node.NodeInfoBase):
+ current_version_id = 1
+
+ field_list = ['csig']
+
+ def str_to_node(self, s):
+ return Value(s)
+
+class ValueBuildInfo(SCons.Node.BuildInfoBase):
+ current_version_id = 1
+
+class Value(SCons.Node.Node):
+ """A class for Python variables, typically passed on the command line
+ or generated by a script, but not from a file or some other source.
+ """
+
+ NodeInfo = ValueNodeInfo
+ BuildInfo = ValueBuildInfo
+
+ def __init__(self, value, built_value=None):
+ SCons.Node.Node.__init__(self)
+ self.value = value
+ if built_value is not None:
+ self.built_value = built_value
+
+ def str_for_display(self):
+ return repr(self.value)
+
+ def __str__(self):
+ return str(self.value)
+
+ def make_ready(self):
+ self.get_csig()
+
+ def build(self, **kw):
+ if not hasattr(self, 'built_value'):
+ apply (SCons.Node.Node.build, (self,), kw)
+
+ is_up_to_date = SCons.Node.Node.children_are_up_to_date
+
+ def is_under(self, dir):
+ # Make Value nodes get built regardless of
+ # what directory scons was run from. Value nodes
+ # are outside the filesystem:
+ return 1
+
+ def write(self, built_value):
+ """Set the value of the node."""
+ self.built_value = built_value
+
+ def read(self):
+ """Return the value. If necessary, the value is built."""
+ self.build()
+ if not hasattr(self, 'built_value'):
+ self.built_value = self.value
+ return self.built_value
+
+ def get_text_contents(self):
+ """By the assumption that the node.built_value is a
+ deterministic product of the sources, the contents of a Value
+ are the concatenation of all the contents of its sources. As
+ the value need not be built when get_contents() is called, we
+ cannot use the actual node.built_value."""
+ ###TODO: something reasonable about universal newlines
+ contents = str(self.value)
+ for kid in self.children(None):
+ contents = contents + kid.get_contents()
+ return contents
+
+ get_contents = get_text_contents ###TODO should return 'bytes' value
+
+ def changed_since_last_build(self, target, prev_ni):
+ cur_csig = self.get_csig()
+ try:
+ return cur_csig != prev_ni.csig
+ except AttributeError:
+ return 1
+
+ def get_csig(self, calc=None):
+ """Because we're a Python value node and don't have a real
+ timestamp, we get to ignore the calculator and just use the
+ value contents."""
+ try:
+ return self.ninfo.csig
+ except AttributeError:
+ pass
+ contents = self.get_contents()
+ self.get_ninfo().csig = contents
+ return contents
+
+# Local Variables:
+# tab-width:4
+# indent-tabs-mode:nil
+# End:
+# vim: set expandtab tabstop=4 shiftwidth=4: