Imported Upstream version 2.3.1upstream/2.3.1

1 files changed, 143 insertions, 17 deletions

diff --git a/src/engine/SCons/Node/FS.py b/src/engine/SCons/Node/FS.py
index a21561f..f54b0ab 100644
--- a/src/engine/SCons/Node/FS.py
+++ b/src/engine/SCons/Node/FS.py
@@ -11,7 +11,7 @@ that can be used by scripts or modules looking for the canonical default.
 """
 
 #
-# Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The SCons Foundation
+# Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014 The SCons Foundation
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the
@@ -32,7 +32,7 @@ that can be used by scripts or modules looking for the canonical default.
 # 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/FS.py  2013/03/03 09:48:35 garyo"
+__revision__ = "src/engine/SCons/Node/FS.py  2014/03/02 14:18:15 garyo"
 
 import fnmatch
 import os
@@ -44,6 +44,7 @@ import time
 import codecs
 
 import SCons.Action
+import SCons.Debug
 from SCons.Debug import logInstanceCreation
 import SCons.Errors
 import SCons.Memoize
@@ -581,7 +582,7 @@ class Base(SCons.Node.Node):
         our relative and absolute paths, identify our parent
         directory, and indicate that this node should use
         signatures."""
-        if __debug__: logInstanceCreation(self, 'Node.FS.Base')
+        if SCons.Debug.track_instances: logInstanceCreation(self, 'Node.FS.Base')
         SCons.Node.Node.__init__(self)
 
         # Filenames and paths are probably reused and are intern'ed to
@@ -1111,7 +1112,7 @@ class FS(LocalFS):
 
         The path argument must be a valid absolute path.
         """
-        if __debug__: logInstanceCreation(self, 'Node.FS')
+        if SCons.Debug.track_instances: logInstanceCreation(self, 'Node.FS')
 
         self._memo = {}
 
@@ -1445,7 +1446,7 @@ class Dir(Base):
     BuildInfo = DirBuildInfo
 
     def __init__(self, name, directory, fs):
-        if __debug__: logInstanceCreation(self, 'Node.FS.Dir')
+        if SCons.Debug.track_instances: logInstanceCreation(self, 'Node.FS.Dir')
         Base.__init__(self, name, directory, fs)
         self._morph()
 
@@ -1841,7 +1842,7 @@ class Dir(Base):
                 for entry in map(_my_normcase, entries):
                     d[entry] = True
             self.on_disk_entries = d
-        if sys.platform == 'win32':
+        if sys.platform == 'win32' or sys.platform == 'cygwin':
             name = _my_normcase(name)
             result = d.get(name)
             if result is None:
@@ -2113,7 +2114,7 @@ class RootDir(Dir):
     this directory.
     """
     def __init__(self, drive, fs):
-        if __debug__: logInstanceCreation(self, 'Node.FS.RootDir')
+        if SCons.Debug.track_instances: logInstanceCreation(self, 'Node.FS.RootDir')
         # We're going to be our own parent directory (".." entry and .dir
         # attribute) so we have to set up some values so Base.__init__()
         # won't gag won't it calls some of our methods.
@@ -2361,7 +2362,7 @@ class File(Base):
                         "Directory %s found where file expected.")
 
     def __init__(self, name, directory, fs):
-        if __debug__: logInstanceCreation(self, 'Node.FS.File')
+        if SCons.Debug.track_instances: logInstanceCreation(self, 'Node.FS.File')
         Base.__init__(self, name, directory, fs)
         self._morph()
 
@@ -2397,6 +2398,8 @@ class File(Base):
         self.scanner_paths = {}
         if not hasattr(self, '_local'):
             self._local = 0
+        if not hasattr(self, 'released_target_info'):
+            self.released_target_info = False
 
         # If there was already a Builder set on this entry, then
         # we need to make sure we call the target-decider function,
@@ -2724,7 +2727,7 @@ class File(Base):
         return self.get_build_env().get_CacheDir().retrieve(self)
 
     def visited(self):
-        if self.exists():
+        if self.exists() and self.executor is not None:
             self.get_build_env().get_CacheDir().push_if_forced(self)
 
         ninfo = self.get_ninfo()
@@ -2746,6 +2749,58 @@ class File(Base):
 
         self.store_info()
 
+    def release_target_info(self):
+        """Called just after this node has been marked
+         up-to-date or was built completely.
+         
+         This is where we try to release as many target node infos
+         as possible for clean builds and update runs, in order
+         to minimize the overall memory consumption.
+         
+         We'd like to remove a lot more attributes like self.sources
+         and self.sources_set, but they might get used
+         in a next build step. For example, during configuration
+         the source files for a built *.o file are used to figure out
+         which linker to use for the resulting Program (gcc vs. g++)!
+         That's why we check for the 'keep_targetinfo' attribute,
+         config Nodes and the Interactive mode just don't allow
+         an early release of most variables. 
+
+         In the same manner, we can't simply remove the self.attributes
+         here. The smart linking relies on the shared flag, and some
+         parts of the java Tool use it to transport information
+         about nodes...
+         
+         @see: built() and Node.release_target_info()
+         """
+        if (self.released_target_info or SCons.Node.interactive):
+            return
+        
+        if not hasattr(self.attributes, 'keep_targetinfo'):
+            # Cache some required values, before releasing
+            # stuff like env, executor and builder...
+            self.changed(allowcache=True)
+            self.get_contents_sig()
+            self.get_build_env()
+            # Now purge unneeded stuff to free memory...
+            self.executor = None
+            self._memo.pop('rfile', None)
+            self.prerequisites = None
+            # Cleanup lists, but only if they're empty
+            if not len(self.ignore_set):
+                self.ignore_set = None
+            if not len(self.implicit_set):
+                self.implicit_set = None
+            if not len(self.depends_set):
+                self.depends_set = None
+            if not len(self.ignore):
+                self.ignore = None
+            if not len(self.depends):
+                self.depends = None
+            # Mark this node as done, we only have to release
+            # the memory once...
+            self.released_target_info = True
+
     def find_src_builder(self):
         if self.rexists():
             return None
@@ -2956,6 +3011,52 @@ class File(Base):
         SCons.Node.Node.builder_set(self, builder)
         self.changed_since_last_build = self.decide_target
 
+    def built(self):
+        """Called just after this File node is successfully built.
+        
+         Just like for 'release_target_info' we try to release
+         some more target node attributes in order to minimize the
+         overall memory consumption.
+         
+         @see: release_target_info
+        """
+
+        SCons.Node.Node.built(self)
+
+        if (not SCons.Node.interactive and 
+            not hasattr(self.attributes, 'keep_targetinfo')):
+            # Ensure that the build infos get computed and cached...        
+            self.store_info()
+            # ... then release some more variables.
+            self._specific_sources = False
+            self.labspath = None
+            self._save_str()
+            self.cwd = None
+             
+            self.scanner_paths = None
+
+    def changed(self, node=None, allowcache=False):
+        """
+        Returns if the node is up-to-date with respect to the BuildInfo
+        stored last time it was built. 
+        
+        For File nodes this is basically a wrapper around Node.changed(),
+        but we allow the return value to get cached after the reference
+        to the Executor got released in release_target_info().
+        
+        @see: Node.changed()
+        """
+        if node is None:
+            try:
+                return self._memo['changed']
+            except KeyError:
+                pass
+        
+        has_changed = SCons.Node.Node.changed(self, node)
+        if allowcache:
+            self._memo['changed'] = has_changed
+        return has_changed
+
     def changed_content(self, target, prev_ni):
         cur_csig = self.get_csig()
         try:
@@ -3089,25 +3190,50 @@ class File(Base):
             self.cachedir_csig = self.get_csig()
         return self.cachedir_csig
 
+    def get_contents_sig(self):
+        """
+        A helper method for get_cachedir_bsig.
+
+        It computes and returns the signature for this
+        node's contents.
+        """
+        
+        try:
+            return self.contentsig
+        except AttributeError:
+            pass
+        
+        executor = self.get_executor()
+
+        result = self.contentsig = SCons.Util.MD5signature(executor.get_contents())
+        return result
+
     def get_cachedir_bsig(self):
+        """
+        Return the signature for a cached file, including
+        its children.
+
+        It adds the path of the cached file to the cache signature,
+        because multiple targets built by the same action will all
+        have the same build signature, and we have to differentiate
+        them somehow.
+        """
         try:
             return self.cachesig
         except AttributeError:
             pass
-
-        # Add the path to the cache signature, because multiple
-        # targets built by the same action will all have the same
-        # build signature, and we have to differentiate them somehow.
+        
+        # Collect signatures for all children
         children = self.children()
-        executor = self.get_executor()
-        # sigs = [n.get_cachedir_csig() for n in children]
         sigs = [n.get_cachedir_csig() for n in children]
-        sigs.append(SCons.Util.MD5signature(executor.get_contents()))
+        # Append this node's signature...
+        sigs.append(self.get_contents_sig())
+        # ...and it's path
         sigs.append(self.path)
+        # Merge this all into a single signature
         result = self.cachesig = SCons.Util.MD5collect(sigs)
         return result
 
-
 default_fs = None
 
 def get_default_fs():