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authorKenneth Heafield <github@kheafield.com>2012-05-12 14:01:52 -0400
committerKenneth Heafield <github@kheafield.com>2012-05-12 14:01:52 -0400
commit3faecf9a00512dcbc8712c4bca9adae72fb64410 (patch)
tree9761b50d12f81a675fb7cbc663ceebad15079f78 /jam-files/boost-build/build/alias.py
parentc806a8fff63043f63773874986301f2822a2b552 (diff)
Give in and copy bjam into cdec source code
Diffstat (limited to 'jam-files/boost-build/build/alias.py')
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+# Copyright 2003, 2004, 2006 Vladimir Prus
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)
+
+# Status: ported (danielw)
+# Base revision: 56043
+
+# This module defines the 'alias' rule and associated class.
+#
+# Alias is just a main target which returns its source targets without any
+# processing. For example::
+#
+# alias bin : hello test_hello ;
+# alias lib : helpers xml_parser ;
+#
+# Another important use of 'alias' is to conveniently group source files::
+#
+# alias platform-src : win.cpp : <os>NT ;
+# alias platform-src : linux.cpp : <os>LINUX ;
+# exe main : main.cpp platform-src ;
+#
+# Lastly, it's possible to create local alias for some target, with different
+# properties::
+#
+# alias big_lib : : @/external_project/big_lib/<link>static ;
+#
+
+import targets
+import property_set
+from b2.manager import get_manager
+
+from b2.util import metatarget
+
+class AliasTarget(targets.BasicTarget):
+
+ def __init__(self, *args):
+ targets.BasicTarget.__init__(self, *args)
+
+ def construct(self, name, source_targets, properties):
+ return [property_set.empty(), source_targets]
+
+ def compute_usage_requirements(self, subvariant):
+ base = targets.BasicTarget.compute_usage_requirements(self, subvariant)
+ # Add source's usage requirement. If we don't do this, "alias" does not
+ # look like 100% alias.
+ return base.add(subvariant.sources_usage_requirements())
+
+@metatarget
+def alias(name, sources=[], requirements=[], default_build=[], usage_requirements=[]):
+
+ project = get_manager().projects().current()
+ targets = get_manager().targets()
+
+ targets.main_target_alternative(AliasTarget(
+ name, project,
+ targets.main_target_sources(sources, name, no_renaming=True),
+ targets.main_target_requirements(requirements or [], project),
+ targets.main_target_default_build(default_build, project),
+ targets.main_target_usage_requirements(usage_requirements or [], project)))
+
+# Declares the 'alias' target. It will build sources, and return them unaltered.
+get_manager().projects().add_rule("alias", alias)
+