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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/tools/cast.py
parentc806a8fff63043f63773874986301f2822a2b552 (diff)
Give in and copy bjam into cdec source code
Diffstat (limited to 'jam-files/boost-build/tools/cast.py')
-rw-r--r--jam-files/boost-build/tools/cast.py69
1 files changed, 69 insertions, 0 deletions
diff --git a/jam-files/boost-build/tools/cast.py b/jam-files/boost-build/tools/cast.py
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+# Status: ported
+# Base revision: 64432.
+# Copyright 2005-2010 Vladimir Prus.
+# Distributed under the Boost Software License, Version 1.0. (See
+# accompanying file LICENSE_1_0.txt or copy at
+# http://www.boost.org/LICENSE_1_0.txt)
+
+# Defines main target 'cast', used to change type for target. For example, in Qt
+# library one wants two kinds of CPP files -- those that just compiled and those
+# that are passed via the MOC tool.
+#
+# This is done with:
+#
+# exe main : main.cpp [ cast _ moccable-cpp : widget.cpp ] ;
+#
+# Boost.Build will assing target type CPP to both main.cpp and widget.cpp. Then,
+# the cast rule will change target type of widget.cpp to MOCCABLE-CPP, and Qt
+# support will run the MOC tool as part of the build process.
+#
+# At the moment, the 'cast' rule only works for non-derived (source) targets.
+#
+# TODO: The following comment is unclear or incorrect. Clean it up.
+# > Another solution would be to add a separate main target 'moc-them' that
+# > would moc all the passed sources, no matter what their type is, but I prefer
+# > cast, as defining a new target type + generator for that type is somewhat
+# > simpler than defining a main target rule.
+
+import b2.build.targets as targets
+import b2.build.virtual_target as virtual_target
+
+from b2.manager import get_manager
+from b2.util import bjam_signature
+
+class CastTargetClass(targets.TypedTarget):
+
+ def construct(name, source_targets, ps):
+ result = []
+ for s in source_targets:
+ if not isinstance(s, virtual_targets.FileTarget):
+ get_manager().errors()("Source to the 'cast' metatager is not a file")
+
+ if s.action():
+ get_manager().errors()("Only non-derived targets allowed as sources for 'cast'.")
+
+
+ r = s.clone_with_different_type(self.type())
+ result.append(get_manager().virtual_targets().register(r))
+
+ return result
+
+
+@bjam_signature((["name", "type"], ["sources", "*"], ["requirements", "*"],
+ ["default_build", "*"], ["usage_requirements", "*"]))
+def cast(name, type, sources, requirements, default_build, usage_requirements):
+
+ from b2.manager import get_manager
+ t = get_manager().targets()
+
+ project = get_manager().projects().current()
+
+ return t.main_target_alternative(
+ CastTargetClass(name, project, type,
+ t.main_target_sources(sources, name),
+ t.main_target_requirements(requirements, project),
+ t.main_target_default_build(default_build, project),
+ t.main_target_usage_requirements(usage_requirements, project)))
+
+
+get_manager().projects().add_rule("cast", cast)