Merged default branch into python3-port to keep it up to date.

Hand-updated a few things to keep them python3-safe, and handled
several merge conflicts.

1 files changed, 31 insertions, 10 deletions

diff --git a/src/engine/SCons/Defaults.py b/src/engine/SCons/Defaults.py
index 92f2344..2eb9c86 100644
--- a/src/engine/SCons/Defaults.py
+++ b/src/engine/SCons/Defaults.py
@@ -144,6 +144,9 @@ ShCAction = SCons.Action.Action("$SHCCCOM", "$SHCCCOMSTR")
 CXXAction = SCons.Action.Action("$CXXCOM", "$CXXCOMSTR")
 ShCXXAction = SCons.Action.Action("$SHCXXCOM", "$SHCXXCOMSTR")
 
+DAction = SCons.Action.Action("$DCOM", "$DCOMSTR")
+ShDAction = SCons.Action.Action("$SHDCOM", "$SHDCOMSTR")
+
 ASAction = SCons.Action.Action("$ASCOM", "$ASCOMSTR")
 ASPPAction = SCons.Action.Action("$ASPPCOM", "$ASPPCOMSTR")
 
@@ -178,20 +181,38 @@ def chmod_strfunc(dest, mode):
 
 Chmod = ActionFactory(chmod_func, chmod_strfunc)
 
-def copy_func(dest, src):
+def copy_func(dest, src, symlinks=True):
+    """
+    If symlinks (is true), then a symbolic link will be
+    shallow copied and recreated as a symbolic link; otherwise, copying
+    a symbolic link will be equivalent to copying the symbolic link's
+    final target regardless of symbolic link depth.
+    """
+
+    dest = str(dest)
+    src = str(src)
+
     SCons.Node.FS.invalidate_node_memos(dest)
     if SCons.Util.is_List(src) and os.path.isdir(dest):
         for file in src:
             shutil.copy2(file, dest)
+        return 0
+    elif os.path.islink(src):
+        linkto = os.readlink(src)
+        if symlinks:
+            return os.symlink(linkto, dest)
+        else:
+            return copy_func(dest, linkto, symlinks)
     elif os.path.isfile(src):
         shutil.copy2(src, dest)
+        return 0
     else:
-        shutil.copytree(src, dest, 1)
-    return 0
+        return shutil.copytree(src, dest, symlinks)
 
-Copy = ActionFactory(copy_func,
-                     lambda dest, src: 'Copy("%s", "%s")' % (dest, src),
-                     convert=str)
+Copy = ActionFactory(
+    copy_func,
+    lambda dest, src, symlinks=True: 'Copy("%s", "%s")' % (dest, src)
+)
 
 def delete_func(dest, must_exist=0):
     SCons.Node.FS.invalidate_node_memos(dest)
@@ -321,7 +342,7 @@ def _stripixes(prefix, itms, suffix, stripprefixes, stripsuffixes, env, c=None):
     where it finds them.  This is used by tools (like the GNU linker)
     that need to turn something like 'libfoo.a' into '-lfoo'.
     """
-    
+
     if not itms:
         return itms
 
@@ -335,7 +356,7 @@ def _stripixes(prefix, itms, suffix, stripprefixes, stripsuffixes, env, c=None):
             c = env_c
         else:
             c = _concat_ixes
-    
+
     stripprefixes = list(map(env.subst, SCons.Util.flatten(stripprefixes)))
     stripsuffixes = list(map(env.subst, SCons.Util.flatten(stripsuffixes)))
 
@@ -413,7 +434,7 @@ def _defines(prefix, defs, suffix, env, c=_concat_ixes):
     """
 
     return c(prefix, env.subst_path(processDefines(defs)), suffix, env)
-    
+
 class NullCmdGenerator(object):
     """This is a callable class that can be used in place of other
     command generators if you don't want them to do anything.
@@ -449,7 +470,7 @@ class Variable_Method_Caller(object):
         self.method = method
     def __call__(self, *args, **kw):
         try: 1//0
-        except ZeroDivisionError: 
+        except ZeroDivisionError:
             # Don't start iterating with the current stack-frame to
             # prevent creating reference cycles (f_back is safe).
             frame = sys.exc_info()[2].tb_frame.f_back