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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/virtual_target.py
parentc806a8fff63043f63773874986301f2822a2b552 (diff)
Give in and copy bjam into cdec source code
Diffstat (limited to 'jam-files/boost-build/build/virtual_target.py')
-rw-r--r--jam-files/boost-build/build/virtual_target.py1118
1 files changed, 1118 insertions, 0 deletions
diff --git a/jam-files/boost-build/build/virtual_target.py b/jam-files/boost-build/build/virtual_target.py
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+++ b/jam-files/boost-build/build/virtual_target.py
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+# Status: ported.
+# Base revision: 64488.
+#
+# Copyright (C) Vladimir Prus 2002. Permission to copy, use, modify, sell and
+# distribute this software is granted provided this copyright notice appears in
+# all copies. This software is provided "as is" without express or implied
+# warranty, and with no claim as to its suitability for any purpose.
+
+# Implements virtual targets, which correspond to actual files created during
+# build, but are not yet targets in Jam sense. They are needed, for example,
+# when searching for possible transormation sequences, when it's not known
+# if particular target should be created at all.
+#
+#
+# +--------------------------+
+# | VirtualTarget |
+# +==========================+
+# | actualize |
+# +--------------------------+
+# | actualize_action() = 0 |
+# | actualize_location() = 0 |
+# +----------------+---------+
+# |
+# ^
+# / \
+# +-+-+
+# |
+# +---------------------+ +-------+--------------+
+# | Action | | AbstractFileTarget |
+# +=====================| * +======================+
+# | action_name | +--+ action |
+# | properties | | +----------------------+
+# +---------------------+--+ | actualize_action() |
+# | actualize() |0..1 +-----------+----------+
+# | path() | |
+# | adjust_properties() | sources |
+# | actualize_sources() | targets |
+# +------+--------------+ ^
+# | / \
+# ^ +-+-+
+# / \ |
+# +-+-+ +-------------+-------------+
+# | | |
+# | +------+---------------+ +--------+-------------+
+# | | FileTarget | | SearchedLibTarget |
+# | +======================+ +======================+
+# | | actualize-location() | | actualize-location() |
+# | +----------------------+ +----------------------+
+# |
+# +-+------------------------------+
+# | |
+# +----+----------------+ +---------+-----------+
+# | CompileAction | | LinkAction |
+# +=====================+ +=====================+
+# | adjust_properties() | | adjust_properties() |
+# +---------------------+ | actualize_sources() |
+# +---------------------+
+#
+# The 'CompileAction' and 'LinkAction' classes are defined not here,
+# but in builtin.jam modules. They are shown in the diagram to give
+# the big picture.
+
+import bjam
+
+import re
+import os.path
+import string
+import types
+
+from b2.util import path, utility, set
+from b2.util.utility import add_grist, get_grist, ungrist, replace_grist, get_value
+from b2.util.sequence import unique
+from b2.tools import common
+from b2.exceptions import *
+import b2.build.type
+import b2.build.property_set as property_set
+
+import b2.build.property as property
+
+from b2.manager import get_manager
+from b2.util import bjam_signature
+
+__re_starts_with_at = re.compile ('^@(.*)')
+
+class VirtualTargetRegistry:
+ def __init__ (self, manager):
+ self.manager_ = manager
+
+ # A cache for FileTargets
+ self.files_ = {}
+
+ # A cache for targets.
+ self.cache_ = {}
+
+ # A map of actual names to virtual targets.
+ # Used to make sure we don't associate same
+ # actual target to two virtual targets.
+ self.actual_ = {}
+
+ self.recent_targets_ = []
+
+ # All targets ever registed
+ self.all_targets_ = []
+
+ self.next_id_ = 0
+
+ def register (self, target):
+ """ Registers a new virtual target. Checks if there's already registered target, with the same
+ name, type, project and subvariant properties, and also with the same sources
+ and equal action. If such target is found it is retured and 'target' is not registered.
+ Otherwise, 'target' is registered and returned.
+ """
+ if target.path():
+ signature = target.path() + "-" + target.name()
+ else:
+ signature = "-" + target.name()
+
+ result = None
+ if not self.cache_.has_key (signature):
+ self.cache_ [signature] = []
+
+ for t in self.cache_ [signature]:
+ a1 = t.action ()
+ a2 = target.action ()
+
+ # TODO: why are we checking for not result?
+ if not result:
+ if not a1 and not a2:
+ result = t
+ else:
+ if a1 and a2 and a1.action_name () == a2.action_name () and a1.sources () == a2.sources ():
+ ps1 = a1.properties ()
+ ps2 = a2.properties ()
+ p1 = ps1.base () + ps1.free () +\
+ b2.util.set.difference(ps1.dependency(), ps1.incidental())
+ p2 = ps2.base () + ps2.free () +\
+ b2.util.set.difference(ps2.dependency(), ps2.incidental())
+ if p1 == p2:
+ result = t
+
+ if not result:
+ self.cache_ [signature].append (target)
+ result = target
+
+ # TODO: Don't append if we found pre-existing target?
+ self.recent_targets_.append(result)
+ self.all_targets_.append(result)
+
+ return result
+
+ def from_file (self, file, file_location, project):
+ """ Creates a virtual target with appropriate name and type from 'file'.
+ If a target with that name in that project was already created, returns that already
+ created target.
+ TODO: more correct way would be to compute path to the file, based on name and source location
+ for the project, and use that path to determine if the target was already created.
+ TODO: passing project with all virtual targets starts to be annoying.
+ """
+ # Check if we've created a target corresponding to this file.
+ path = os.path.join(os.getcwd(), file_location, file)
+ path = os.path.normpath(path)
+
+ if self.files_.has_key (path):
+ return self.files_ [path]
+
+ file_type = b2.build.type.type (file)
+
+ result = FileTarget (file, file_type, project,
+ None, file_location)
+ self.files_ [path] = result
+
+ return result
+
+ def recent_targets(self):
+ """Each target returned by 'register' is added to a list of
+ 'recent-target', returned by this function. So, this allows
+ us to find all targets created when building a given main
+ target, even if the target."""
+
+ return self.recent_targets_
+
+ def clear_recent_targets(self):
+ self.recent_targets_ = []
+
+ def all_targets(self):
+ # Returns all virtual targets ever created
+ return self.all_targets_
+
+ # Returns all targets from 'targets' with types
+ # equal to 'type' or derived from it.
+ def select_by_type(self, type, targets):
+ return [t for t in targets if b2.build.type.is_sybtype(t.type(), type)]
+
+ def register_actual_name (self, actual_name, virtual_target):
+ if self.actual_.has_key (actual_name):
+ cs1 = self.actual_ [actual_name].creating_subvariant ()
+ cs2 = virtual_target.creating_subvariant ()
+ cmt1 = cs1.main_target ()
+ cmt2 = cs2.main_target ()
+
+ action1 = self.actual_ [actual_name].action ()
+ action2 = virtual_target.action ()
+
+ properties_added = []
+ properties_removed = []
+ if action1 and action2:
+ p1 = action1.properties ()
+ p1 = p1.raw ()
+ p2 = action2.properties ()
+ p2 = p2.raw ()
+
+ properties_removed = set.difference (p1, p2)
+ if not properties_removed: properties_removed = "none"
+
+ properties_added = set.difference (p2, p1)
+ if not properties_added: properties_added = "none"
+
+ # FIXME: Revive printing of real location.
+ get_manager().errors()(
+ "Duplicate name of actual target: '%s'\n"
+ "previous virtual target '%s'\n"
+ "created from '%s'\n"
+ "another virtual target '%s'\n"
+ "created from '%s'\n"
+ "added properties: '%s'\n"
+ "removed properties: '%s'\n"
+ % (actual_name,
+ self.actual_ [actual_name], "loc", #cmt1.location (),
+ virtual_target,
+ "loc", #cmt2.location (),
+ properties_added, properties_removed))
+
+ else:
+ self.actual_ [actual_name] = virtual_target
+
+
+ def add_suffix (self, specified_name, file_type, prop_set):
+ """ Appends the suffix appropriate to 'type/property_set' combination
+ to the specified name and returns the result.
+ """
+ suffix = b2.build.type.generated_target_suffix (file_type, prop_set)
+
+ if suffix:
+ return specified_name + '.' + suffix
+
+ else:
+ return specified_name
+
+class VirtualTarget:
+ """ Potential target. It can be converted into jam target and used in
+ building, if needed. However, it can be also dropped, which allows
+ to search for different transformation and select only one.
+ name: name of this target.
+ project: project to which this target belongs.
+ """
+ def __init__ (self, name, project):
+ self.name_ = name
+ self.project_ = project
+ self.dependencies_ = []
+ self.always_ = False
+
+ # Caches if dapendencies for scanners have already been set.
+ self.made_ = {}
+
+ def manager(self):
+ return self.project_.manager()
+
+ def virtual_targets(self):
+ return self.manager().virtual_targets()
+
+ def name (self):
+ """ Name of this target.
+ """
+ return self.name_
+
+ def project (self):
+ """ Project of this target.
+ """
+ return self.project_
+
+ def depends (self, d):
+ """ Adds additional instances of 'VirtualTarget' that this
+ one depends on.
+ """
+ self.dependencies_ = unique (self.dependencies_ + d).sort ()
+
+ def dependencies (self):
+ return self.dependencies_
+
+ def always(self):
+ self.always_ = True
+
+ def actualize (self, scanner = None):
+ """ Generates all the actual targets and sets up build actions for
+ this target.
+
+ If 'scanner' is specified, creates an additional target
+ with the same location as actual target, which will depend on the
+ actual target and be associated with 'scanner'. That additional
+ target is returned. See the docs (#dependency_scanning) for rationale.
+ Target must correspond to a file if 'scanner' is specified.
+
+ If scanner is not specified, then actual target is returned.
+ """
+ actual_name = self.actualize_no_scanner ()
+
+ if self.always_:
+ bjam.call("ALWAYS", actual_name)
+
+ if not scanner:
+ return actual_name
+
+ else:
+ # Add the scanner instance to the grist for name.
+ g = '-'.join ([ungrist(get_grist(actual_name)), str(id(scanner))])
+
+ name = replace_grist (actual_name, '<' + g + '>')
+
+ if not self.made_.has_key (name):
+ self.made_ [name] = True
+
+ self.project_.manager ().engine ().add_dependency (name, actual_name)
+
+ self.actualize_location (name)
+
+ self.project_.manager ().scanners ().install (scanner, name, str (self))
+
+ return name
+
+# private: (overridables)
+
+ def actualize_action (self, target):
+ """ Sets up build actions for 'target'. Should call appropriate rules
+ and set target variables.
+ """
+ raise BaseException ("method should be defined in derived classes")
+
+ def actualize_location (self, target):
+ """ Sets up variables on 'target' which specify its location.
+ """
+ raise BaseException ("method should be defined in derived classes")
+
+ def path (self):
+ """ If the target is generated one, returns the path where it will be
+ generated. Otherwise, returns empty list.
+ """
+ raise BaseException ("method should be defined in derived classes")
+
+ def actual_name (self):
+ """ Return that actual target name that should be used
+ (for the case where no scanner is involved)
+ """
+ raise BaseException ("method should be defined in derived classes")
+
+
+class AbstractFileTarget (VirtualTarget):
+ """ Target which correspond to a file. The exact mapping for file
+ is not yet specified in this class. (TODO: Actually, the class name
+ could be better...)
+
+ May be a source file (when no action is specified), or
+ derived file (otherwise).
+
+ The target's grist is concatenation of project's location,
+ properties of action (for derived files), and, optionally,
+ value identifying the main target.
+
+ exact: If non-empty, the name is exactly the name
+ created file should have. Otherwise, the '__init__'
+ method will add suffix obtained from 'type' by
+ calling 'type.generated-target-suffix'.
+
+ type: optional type of this target.
+ """
+ def __init__ (self, name, type, project, action = None, exact=False):
+ VirtualTarget.__init__ (self, name, project)
+
+ self.type_ = type
+
+ self.action_ = action
+ self.exact_ = exact
+
+ if action:
+ action.add_targets ([self])
+
+ if self.type and not exact:
+ self.__adjust_name (name)
+
+
+ self.actual_name_ = None
+ self.path_ = None
+ self.intermediate_ = False
+ self.creating_subvariant_ = None
+
+ # True if this is a root target.
+ self.root_ = False
+
+ def type (self):
+ return self.type_
+
+ def set_path (self, path):
+ """ Sets the path. When generating target name, it will override any path
+ computation from properties.
+ """
+ self.path_ = path
+
+ def action (self):
+ """ Returns the action.
+ """
+ return self.action_
+
+ def root (self, set = None):
+ """ Sets/gets the 'root' flag. Target is root is it directly correspods to some
+ variant of a main target.
+ """
+ if set:
+ self.root_ = True
+ return self.root_
+
+ def creating_subvariant (self, s = None):
+ """ Gets or sets the subvariant which created this target. Subvariant
+ is set when target is brought into existance, and is never changed
+ after that. In particual, if target is shared by subvariant, only
+ the first is stored.
+ s: If specified, specified the value to set,
+ which should be instance of 'subvariant' class.
+ """
+ if s and not self.creating_subvariant ():
+ if self.creating_subvariant ():
+ raise BaseException ("Attempt to change 'dg'")
+
+ else:
+ self.creating_subvariant_ = s
+
+ return self.creating_subvariant_
+
+ def actualize_action (self, target):
+ if self.action_:
+ self.action_.actualize ()
+
+ # Return a human-readable representation of this target
+ #
+ # If this target has an action, that's:
+ #
+ # { <action-name>-<self.name>.<self.type> <action-sources>... }
+ #
+ # otherwise, it's:
+ #
+ # { <self.name>.<self.type> }
+ #
+ def str(self):
+ a = self.action()
+
+ name_dot_type = self.name_ + "." + self.type_
+
+ if a:
+ action_name = a.action_name()
+ ss = [ s.str() for s in a.sources()]
+
+ return "{ %s-%s %s}" % (action_name, name_dot_type, str(ss))
+ else:
+ return "{ " + name_dot_type + " }"
+
+# private:
+
+ def actual_name (self):
+ if not self.actual_name_:
+ self.actual_name_ = '<' + self.grist() + '>' + self.name_
+
+ return self.actual_name_
+
+ def grist (self):
+ """Helper to 'actual_name', above. Compute unique prefix used to distinguish
+ this target from other targets with the same name which create different
+ file.
+ """
+ # Depending on target, there may be different approaches to generating
+ # unique prefixes. We'll generate prefixes in the form
+ # <one letter approach code> <the actual prefix>
+ path = self.path ()
+
+ if path:
+ # The target will be generated to a known path. Just use the path
+ # for identification, since path is as unique as it can get.
+ return 'p' + path
+
+ else:
+ # File is either source, which will be searched for, or is not a file at
+ # all. Use the location of project for distinguishing.
+ project_location = self.project_.get ('location')
+ path_components = b2.util.path.split(project_location)
+ location_grist = '!'.join (path_components)
+
+ if self.action_:
+ ps = self.action_.properties ()
+ property_grist = ps.as_path ()
+ # 'property_grist' can be empty when 'ps' is an empty
+ # property set.
+ if property_grist:
+ location_grist = location_grist + '/' + property_grist
+
+ return 'l' + location_grist
+
+ def __adjust_name(self, specified_name):
+ """Given the target name specified in constructor, returns the
+ name which should be really used, by looking at the <tag> properties.
+ The tag properties come in two flavour:
+ - <tag>value,
+ - <tag>@rule-name
+ In the first case, value is just added to name
+ In the second case, the specified rule is called with specified name,
+ target type and properties and should return the new name.
+ If not <tag> property is specified, or the rule specified by
+ <tag> returns nothing, returns the result of calling
+ virtual-target.add-suffix"""
+
+ if self.action_:
+ ps = self.action_.properties()
+ else:
+ ps = property_set.empty()
+
+ # FIXME: I'm not sure how this is used, need to check with
+ # Rene to figure out how to implement
+ #~ We add ourselves to the properties so that any tag rule can get
+ #~ more direct information about the target than just that available
+ #~ through the properties. This is useful in implementing
+ #~ name changes based on the sources of the target. For example to
+ #~ make unique names of object files based on the source file.
+ #~ --grafik
+ #ps = property_set.create(ps.raw() + ["<target>%s" % "XXXX"])
+ #ps = [ property-set.create [ $(ps).raw ] <target>$(__name__) ] ;
+
+ tag = ps.get("<tag>")
+
+ if tag:
+
+ if len(tag) > 1:
+ get_manager().errors()(
+ """<tag>@rulename is present but is not the only <tag> feature""")
+
+ tag = tag[0]
+ if callable(tag):
+ self.name_ = tag(specified_name, self.type_, ps)
+ else:
+ if not tag[0] == '@':
+ self.manager_.errors()("""The value of the <tag> feature must be '@rule-nane'""")
+
+ exported_ps = b2.util.value_to_jam(ps, methods=True)
+ self.name_ = b2.util.call_jam_function(
+ tag[1:], specified_name, self.type_, exported_ps)
+ if self.name_:
+ self.name_ = self.name_[0]
+
+ # If there's no tag or the tag rule returned nothing.
+ if not tag or not self.name_:
+ self.name_ = add_prefix_and_suffix(specified_name, self.type_, ps)
+
+ def actualize_no_scanner(self):
+ name = self.actual_name()
+
+ # Do anything only on the first invocation
+ if not self.made_:
+ self.made_[name] = True
+
+ if self.action_:
+ # For non-derived target, we don't care if there
+ # are several virtual targets that refer to the same name.
+ # One case when this is unavoidable is when file name is
+ # main.cpp and two targets have types CPP (for compiling)
+ # and MOCCABLE_CPP (for convertion to H via Qt tools).
+ self.virtual_targets().register_actual_name(name, self)
+
+ for i in self.dependencies_:
+ self.manager_.engine().add_dependency(name, i.actualize())
+
+ self.actualize_location(name)
+ self.actualize_action(name)
+
+ return name
+
+@bjam_signature((["specified_name"], ["type"], ["property_set"]))
+def add_prefix_and_suffix(specified_name, type, property_set):
+ """Appends the suffix appropriate to 'type/property-set' combination
+ to the specified name and returns the result."""
+
+ property_set = b2.util.jam_to_value_maybe(property_set)
+
+ suffix = ""
+ if type:
+ suffix = b2.build.type.generated_target_suffix(type, property_set)
+
+ # Handle suffixes for which no leading dot is desired. Those are
+ # specified by enclosing them in <...>. Needed by python so it
+ # can create "_d.so" extensions, for example.
+ if get_grist(suffix):
+ suffix = ungrist(suffix)
+ elif suffix:
+ suffix = "." + suffix
+
+ prefix = ""
+ if type:
+ prefix = b2.build.type.generated_target_prefix(type, property_set)
+
+ if specified_name.startswith(prefix):
+ prefix = ""
+
+ if not prefix:
+ prefix = ""
+ if not suffix:
+ suffix = ""
+ return prefix + specified_name + suffix
+
+
+class FileTarget (AbstractFileTarget):
+ """ File target with explicitly known location.
+
+ The file path is determined as
+ - value passed to the 'set_path' method, if any
+ - for derived files, project's build dir, joined with components
+ that describe action's properties. If the free properties
+ are not equal to the project's reference properties
+ an element with name of main target is added.
+ - for source files, project's source dir
+
+ The file suffix is
+ - the value passed to the 'suffix' method, if any, or
+ - the suffix which correspond to the target's type.
+ """
+ def __init__ (self, name, type, project, action = None, path=None, exact=False):
+ AbstractFileTarget.__init__ (self, name, type, project, action, exact)
+
+ self.path_ = path
+
+ def __str__(self):
+ if self.type_:
+ return self.name_ + "." + self.type_
+ else:
+ return self.name_
+
+ def clone_with_different_type(self, new_type):
+ return FileTarget(self.name_, new_type, self.project_,
+ self.action_, self.path_, exact=True)
+
+ def actualize_location (self, target):
+ engine = self.project_.manager_.engine ()
+
+ if self.action_:
+ # This is a derived file.
+ path = self.path ()
+ engine.set_target_variable (target, 'LOCATE', path)
+
+ # Make sure the path exists.
+ engine.add_dependency (target, path)
+ common.mkdir(engine, path)
+
+ # It's possible that the target name includes a directory
+ # too, for example when installing headers. Create that
+ # directory.
+ d = os.path.dirname(get_value(target))
+ if d:
+ d = os.path.join(path, d)
+ engine.add_dependency(target, d)
+ common.mkdir(engine, d)
+
+ # For real file target, we create a fake target that
+ # depends on the real target. This allows to run
+ #
+ # bjam hello.o
+ #
+ # without trying to guess the name of the real target.
+ # Note the that target has no directory name, and a special
+ # grist <e>.
+ #
+ # First, that means that "bjam hello.o" will build all
+ # known hello.o targets.
+ # Second, the <e> grist makes sure this target won't be confused
+ # with other targets, for example, if we have subdir 'test'
+ # with target 'test' in it that includes 'test.o' file,
+ # then the target for directory will be just 'test' the target
+ # for test.o will be <ptest/bin/gcc/debug>test.o and the target
+ # we create below will be <e>test.o
+ engine.add_dependency("<e>%s" % get_value(target), target)
+
+ # Allow bjam <path-to-file>/<file> to work. This won't catch all
+ # possible ways to refer to the path (relative/absolute, extra ".",
+ # various "..", but should help in obvious cases.
+ engine.add_dependency("<e>%s" % (os.path.join(path, get_value(target))), target)
+
+ else:
+ # This is a source file.
+ engine.set_target_variable (target, 'SEARCH', self.project_.get ('source-location'))
+
+
+ def path (self):
+ """ Returns the directory for this target.
+ """
+ if not self.path_:
+ if self.action_:
+ p = self.action_.properties ()
+ (target_path, relative_to_build_dir) = p.target_path ()
+
+ if relative_to_build_dir:
+ # Indicates that the path is relative to
+ # build dir.
+ target_path = os.path.join (self.project_.build_dir (), target_path)
+
+ # Store the computed path, so that it's not recomputed
+ # any more
+ self.path_ = target_path
+
+ return self.path_
+
+
+class NotFileTarget(AbstractFileTarget):
+
+ def __init__(self, name, project, action):
+ AbstractFileTarget.__init__(self, name, None, project, action)
+
+ def path(self):
+ """Returns nothing, to indicate that target path is not known."""
+ return None
+
+ def actualize_location(self, target):
+ bjam.call("NOTFILE", target)
+ bjam.call("ALWAYS", target)
+ bjam.call("NOUPDATE", target)
+
+
+class Action:
+ """ Class which represents an action.
+ Both 'targets' and 'sources' should list instances of 'VirtualTarget'.
+ Action name should name a rule with this prototype
+ rule action_name ( targets + : sources * : properties * )
+ Targets and sources are passed as actual jam targets. The rule may
+ not establish dependency relationship, but should do everything else.
+ """
+ def __init__ (self, manager, sources, action_name, prop_set):
+ assert(isinstance(prop_set, property_set.PropertySet))
+ assert type(sources) == types.ListType
+ self.sources_ = sources
+ self.action_name_ = action_name
+ if not prop_set:
+ prop_set = property_set.empty()
+ self.properties_ = prop_set
+ if not all(isinstance(v, VirtualTarget) for v in prop_set.get('implicit-dependency')):
+ import pdb
+ pdb.set_trace()
+
+ self.manager_ = manager
+ self.engine_ = self.manager_.engine ()
+ self.targets_ = []
+
+ # Indicates whether this has been actualized or not.
+ self.actualized_ = False
+
+ self.dependency_only_sources_ = []
+ self.actual_sources_ = []
+
+
+ def add_targets (self, targets):
+ self.targets_ += targets
+
+
+ def replace_targets (old_targets, new_targets):
+ self.targets_ = [t for t in targets if not t in old_targets] + new_targets
+
+ def targets (self):
+ return self.targets_
+
+ def sources (self):
+ return self.sources_
+
+ def action_name (self):
+ return self.action_name_
+
+ def properties (self):
+ return self.properties_
+
+ def actualize (self):
+ """ Generates actual build instructions.
+ """
+ if self.actualized_:
+ return
+
+ self.actualized_ = True
+
+ ps = self.properties ()
+ properties = self.adjust_properties (ps)
+
+
+ actual_targets = []
+
+ for i in self.targets ():
+ actual_targets.append (i.actualize ())
+
+ self.actualize_sources (self.sources (), properties)
+
+ self.engine_.add_dependency (actual_targets, self.actual_sources_ + self.dependency_only_sources_)
+
+ # This works around a bug with -j and actions that
+ # produce multiple target, where:
+ # - dependency on the first output is found, and
+ # the action is started
+ # - dependency on the second output is found, and
+ # bjam noticed that command is already running
+ # - instead of waiting for the command, dependents
+ # of the second targets are immediately updated.
+ if len(actual_targets) > 1:
+ bjam.call("INCLUDES", actual_targets, actual_targets)
+
+ # FIXME: check the comment below. Was self.action_name_ [1]
+ # Action name can include additional argument to rule, which should not
+ # be passed to 'set-target-variables'
+ # FIXME: breaking circular dependency
+ import toolset
+ toolset.set_target_variables (self.manager_, self.action_name_, actual_targets, properties)
+
+ engine = self.manager_.engine ()
+
+ # FIXME: this is supposed to help --out-xml option, but we don't
+ # implement that now, and anyway, we should handle it in Python,
+ # not but putting variables on bjam-level targets.
+ bjam.call("set-target-variable", actual_targets, ".action", repr(self))
+
+ self.manager_.engine ().set_update_action (self.action_name_, actual_targets, self.actual_sources_,
+ properties)
+
+ # Since we set up creating action here, we also set up
+ # action for cleaning up
+ self.manager_.engine ().set_update_action ('common.Clean', 'clean-all',
+ actual_targets)
+
+ return actual_targets
+
+ def actualize_source_type (self, sources, prop_set):
+ """ Helper for 'actualize_sources'.
+ For each passed source, actualizes it with the appropriate scanner.
+ Returns the actualized virtual targets.
+ """
+ result = []
+ for i in sources:
+ scanner = None
+
+# FIXME: what's this?
+# if isinstance (i, str):
+# i = self.manager_.get_object (i)
+
+ if i.type ():
+ scanner = b2.build.type.get_scanner (i.type (), prop_set)
+
+ r = i.actualize (scanner)
+ result.append (r)
+
+ return result
+
+ def actualize_sources (self, sources, prop_set):
+ """ Creates actual jam targets for sources. Initializes two member
+ variables:
+ 'self.actual_sources_' -- sources which are passed to updating action
+ 'self.dependency_only_sources_' -- sources which are made dependencies, but
+ are not used otherwise.
+
+ New values will be *appended* to the variables. They may be non-empty,
+ if caller wants it.
+ """
+ dependencies = self.properties_.get ('<dependency>')
+
+ self.dependency_only_sources_ += self.actualize_source_type (dependencies, prop_set)
+ self.actual_sources_ += self.actualize_source_type (sources, prop_set)
+
+ # This is used to help bjam find dependencies in generated headers
+ # in other main targets.
+ # Say:
+ #
+ # make a.h : ....... ;
+ # exe hello : hello.cpp : <implicit-dependency>a.h ;
+ #
+ # However, for bjam to find the dependency the generated target must
+ # be actualized (i.e. have the jam target). In the above case,
+ # if we're building just hello ("bjam hello"), 'a.h' won't be
+ # actualized unless we do it here.
+ implicit = self.properties_.get("<implicit-dependency>")
+
+ for i in implicit:
+ i.actualize()
+
+ def adjust_properties (self, prop_set):
+ """ Determines real properties when trying building with 'properties'.
+ This is last chance to fix properties, for example to adjust includes
+ to get generated headers correctly. Default implementation returns
+ its argument.
+ """
+ return prop_set
+
+
+class NullAction (Action):
+ """ Action class which does nothing --- it produces the targets with
+ specific properties out of nowhere. It's needed to distinguish virtual
+ targets with different properties that are known to exist, and have no
+ actions which create them.
+ """
+ def __init__ (self, manager, prop_set):
+ Action.__init__ (self, manager, [], None, prop_set)
+
+ def actualize (self):
+ if not self.actualized_:
+ self.actualized_ = True
+
+ for i in self.targets ():
+ i.actualize ()
+
+class NonScanningAction(Action):
+ """Class which acts exactly like 'action', except that the sources
+ are not scanned for dependencies."""
+
+ def __init__(self, sources, action_name, property_set):
+ #FIXME: should the manager parameter of Action.__init__
+ #be removed? -- Steven Watanabe
+ Action.__init__(self, b2.manager.get_manager(), sources, action_name, property_set)
+
+ def actualize_source_type(self, sources, property_set):
+
+ result = []
+ for s in sources:
+ result.append(s.actualize())
+ return result
+
+def traverse (target, include_roots = False, include_sources = False):
+ """ Traverses the dependency graph of 'target' and return all targets that will
+ be created before this one is created. If root of some dependency graph is
+ found during traversal, it's either included or not, dependencing of the
+ value of 'include_roots'. In either case, sources of root are not traversed.
+ """
+ result = []
+
+ if target.action ():
+ action = target.action ()
+
+ # This includes 'target' as well
+ result += action.targets ()
+
+ for t in action.sources ():
+
+ # FIXME:
+ # TODO: see comment in Manager.register_object ()
+ #if not isinstance (t, VirtualTarget):
+ # t = target.project_.manager_.get_object (t)
+
+ if not t.root ():
+ result += traverse (t, include_roots, include_sources)
+
+ elif include_roots:
+ result.append (t)
+
+ elif include_sources:
+ result.append (target)
+
+ return result
+
+def clone_action (action, new_project, new_action_name, new_properties):
+ """Takes an 'action' instances and creates new instance of it
+ and all produced target. The rule-name and properties are set
+ to 'new-rule-name' and 'new-properties', if those are specified.
+ Returns the cloned action."""
+
+ if not new_action_name:
+ new_action_name = action.action_name()
+
+ if not new_properties:
+ new_properties = action.properties()
+
+ cloned_action = action.__class__(action.manager_, action.sources(), new_action_name,
+ new_properties)
+
+ cloned_targets = []
+ for target in action.targets():
+
+ n = target.name()
+ # Don't modify the name of the produced targets. Strip the directory f
+ cloned_target = FileTarget(n, target.type(), new_project,
+ cloned_action, exact=True)
+
+ d = target.dependencies()
+ if d:
+ cloned_target.depends(d)
+ cloned_target.root(target.root())
+ cloned_target.creating_subvariant(target.creating_subvariant())
+
+ cloned_targets.append(cloned_target)
+
+ return cloned_action
+
+class Subvariant:
+
+ def __init__ (self, main_target, prop_set, sources, build_properties, sources_usage_requirements, created_targets):
+ """
+ main_target: The instance of MainTarget class
+ prop_set: Properties requested for this target
+ sources:
+ build_properties: Actually used properties
+ sources_usage_requirements: Properties propagated from sources
+ created_targets: Top-level created targets
+ """
+ self.main_target_ = main_target
+ self.properties_ = prop_set
+ self.sources_ = sources
+ self.build_properties_ = build_properties
+ self.sources_usage_requirements_ = sources_usage_requirements
+ self.created_targets_ = created_targets
+
+ self.usage_requirements_ = None
+
+ # Pre-compose the list of other dependency graphs, on which this one
+ # depends
+ deps = build_properties.get('<implicit-dependency>')
+
+ self.other_dg_ = []
+ for d in deps:
+ self.other_dg_.append(d.creating_subvariant ())
+
+ self.other_dg_ = unique (self.other_dg_)
+
+ self.implicit_includes_cache_ = {}
+ self.target_directories_ = None
+
+ def main_target (self):
+ return self.main_target_
+
+ def created_targets (self):
+ return self.created_targets_
+
+ def requested_properties (self):
+ return self.properties_
+
+ def build_properties (self):
+ return self.build_properties_
+
+ def sources_usage_requirements (self):
+ return self.sources_usage_requirements_
+
+ def set_usage_requirements (self, usage_requirements):
+ self.usage_requirements_ = usage_requirements
+
+ def usage_requirements (self):
+ return self.usage_requirements_
+
+ def all_referenced_targets(self, result):
+ """Returns all targets referenced by this subvariant,
+ either directly or indirectly, and either as sources,
+ or as dependency properties. Targets referred with
+ dependency property are returned a properties, not targets."""
+
+ # Find directly referenced targets.
+ deps = self.build_properties().dependency()
+ all_targets = self.sources_ + deps
+
+ # Find other subvariants.
+ r = []
+ for e in all_targets:
+ if not e in result:
+ result.add(e)
+ if isinstance(e, property.Property):
+ t = e.value()
+ else:
+ t = e
+
+ # FIXME: how can this be?
+ cs = t.creating_subvariant()
+ if cs:
+ r.append(cs)
+ r = unique(r)
+ for s in r:
+ if s != self:
+ s.all_referenced_targets(result)
+
+
+ def implicit_includes (self, feature, target_type):
+ """ Returns the properties which specify implicit include paths to
+ generated headers. This traverses all targets in this subvariant,
+ and subvariants referred by <implcit-dependecy>properties.
+ For all targets which are of type 'target-type' (or for all targets,
+ if 'target_type' is not specified), the result will contain
+ <$(feature)>path-to-that-target.
+ """
+
+ if not target_type:
+ key = feature
+ else:
+ key = feature + "-" + target_type
+
+
+ result = self.implicit_includes_cache_.get(key)
+ if not result:
+ target_paths = self.all_target_directories(target_type)
+ target_paths = unique(target_paths)
+ result = ["<%s>%s" % (feature, p) for p in target_paths]
+ self.implicit_includes_cache_[key] = result
+
+ return result
+
+ def all_target_directories(self, target_type = None):
+ # TODO: does not appear to use target_type in deciding
+ # if we've computed this already.
+ if not self.target_directories_:
+ self.target_directories_ = self.compute_target_directories(target_type)
+ return self.target_directories_
+
+ def compute_target_directories(self, target_type=None):
+ result = []
+ for t in self.created_targets():
+ if not target_type or b2.build.type.is_derived(t.type(), target_type):
+ result.append(t.path())
+
+ for d in self.other_dg_:
+ result.extend(d.all_target_directories(target_type))
+
+ result = unique(result)
+ return result