Bringing in sct changes.

site_scons/site_tools/component_targets_msvs.py

Index: site_scons/site_tools/component_targets_msvs.py
===================================================================
--- site_scons/site_tools/component_targets_msvs.py	(revision 5002)
+++ site_scons/site_tools/component_targets_msvs.py	(working copy)
@@ -30,7 +30,9 @@
 
 """Visual Studio solution output of component targets for SCons."""
 
+import copy
 import md5
+import os
 import sys
 import xml.dom
 import xml.dom.minidom
@@ -65,7 +67,7 @@
 #------------------------------------------------------------------------------
 
 
-def GetGuidFromVSProject(project_path):
+def GetGuidAndNameFromVSProject(project_path):
   """Reads the GUID from a Visual Studio project file.
 
   Args:
@@ -73,6 +75,7 @@
 
   Returns:
     The GUID string from the file.
+    The project name from the file.
   """
   doc = xml.dom.minidom.parse(project_path)
   try:
@@ -80,7 +83,10 @@
     if n_root.nodeName != 'VisualStudioProject':
       raise SCons.Errors.UserError('%s is not a Visual Studio project.' %
                                    project_path)
-    return str(n_root.attributes['ProjectGUID'].nodeValue)
+    return (
+        str(n_root.attributes['ProjectGUID'].nodeValue),
+        str(n_root.attributes['Name'].nodeValue),
+    )
   finally:
     # Clean up doc
     doc.unlink()
@@ -88,6 +94,146 @@
 #------------------------------------------------------------------------------
 
 
+class VSProjectWriter(object):
+  """Visual Studio XML project writer."""
+
+  def __init__(self, project_path):
+    """Initializes the project.
+
+    Args:
+      project_path: Path to the project file.
+    """
+    self.project_path = project_path
+    self.doc = None
+
+  def Create(self, name):
+    """Creates the project document.
+
+    Args:
+      name: Name of the project.
+    """
+    self.name = name
+    self.guid = MakeGuid(name)
+
+    # Create XML doc
+    xml_impl = xml.dom.getDOMImplementation()
+    self.doc = xml_impl.createDocument(None, 'VisualStudioProject', None)
+
+    # Add attributes to root element
+    self.n_root = self.doc.documentElement
+    self.n_root.setAttribute('ProjectType', 'Visual C++')
+    self.n_root.setAttribute('Version', '8.00')
+    self.n_root.setAttribute('Name', self.name)
+    self.n_root.setAttribute('ProjectGUID', self.guid)
+    self.n_root.setAttribute('RootNamespace', self.name)
+    self.n_root.setAttribute('Keyword', 'MakeFileProj')
+
+    # Add platform list
+    n_platform = self.doc.createElement('Platforms')
+    self.n_root.appendChild(n_platform)
+    n = self.doc.createElement('Platform')
+    n.setAttribute('Name', 'Win32')
+    n_platform.appendChild(n)
+
+    # Add empty ToolFiles section
+    self.n_root.appendChild(self.doc.createElement('ToolFiles'))
+
+    # Add configurations section
+    self.n_configs = self.doc.createElement('Configurations')
+    self.n_root.appendChild(self.n_configs)
+
+    # Add files section
+    self.n_files = self.doc.createElement('Files')
+    self.n_root.appendChild(self.n_files)
+
+    # Add empty Globals section
+    self.n_root.appendChild(self.doc.createElement('Globals'))
+
+  def AddConfig(self, name, attrs, tool_attrs):
+    """Adds a configuration to the project.
+
+    Args:
+      name: Configuration name.
+      attrs: Dict of configuration attributes.
+      tool_attrs: Dict of tool attributes.
+    """
+    # Add configuration node
+    n_config = self.doc.createElement('Configuration')
+    n_config.setAttribute('Name', '%s|Win32' % name)
+    n_config.setAttribute('ConfigurationType', '0')
+    for k, v in attrs.items():
+      n_config.setAttribute(k, v)
+    self.n_configs.appendChild(n_config)
+
+    # Add tool node
+    n_tool = self.doc.createElement('Tool')
+    n_tool.setAttribute('Name', 'VCNMakeTool')
+    n_tool.setAttribute('IncludeSearchPath', '')
+    n_tool.setAttribute('ForcedIncludes', '')
+    n_tool.setAttribute('AssemblySearchPath', '')
+    n_tool.setAttribute('ForcedUsingAssemblies', '')
+    n_tool.setAttribute('CompileAsManaged', '')
+    n_tool.setAttribute('PreprocessorDefinitions', '')
+    for k, v in tool_attrs.items():
+      n_tool.setAttribute(k, v)
+    n_config.appendChild(n_tool)
+
+  def _WalkFolders(self, folder_dict, parent):
+    """Recursively walks the folder tree.
+
+    Args:
+      folder_dict: Dict of folder entries.  Entry is
+           either subdir_name:subdir_dict or relative_path_to_file:None.
+      parent: Parent node (folder node for that dict)
+    """
+    entries = folder_dict.keys()
+    entries.sort()
+    for e in entries:
+      if folder_dict[e]:
+        # Folder
+        n_subfolder = self.doc.createElement('Filter')
+        n_subfolder.setAttribute('Name', e)
+        parent.appendChild(n_subfolder)
+        self._WalkFolders(folder_dict[e], n_subfolder)
+      else:
+        # File
+        n_file = self.doc.createElement('File')
+        n_file.setAttribute('RelativePath', e)
+        parent.appendChild(n_file)
+
+  def AddFiles(self, name, files_dict):
+    """Adds files to the project.
+
+    Args:
+      name: Name of the folder.  If None, files/folders will be added directly
+        to the files list.
+      files_dict: A dict of files / folders.
+
+    Within the files_dict:
+      * A file entry is relative_path:None
+      * A folder entry is folder_name:files_dict, where files_dict is another
+        dict of this form.
+    """
+    # Create subfolder if necessary
+    if name:
+      n_folder = self.doc.createElement('Filter')
+      n_folder.setAttribute('Name', name)
+      self.n_files.appendChild(n_folder)
+    else:
+      n_folder = self.n_files
+
+    # Recursively add files to the folder
+    self._WalkFolders(files_dict, n_folder)
+
+  def Write(self):
+    """Writes the project file."""
+    f = open(self.project_path, 'wt')
+    self.doc.writexml(f, encoding='Windows-1252', addindent='  ', newl='\n')
+    f.close()
+
+#------------------------------------------------------------------------------
+
+
 def ComponentVSProjectBuilder(target, source, env):
   """Visual Studio project builder.
 
@@ -109,70 +255,34 @@
   env_hammer_bat = env.Clone(VS_PROJECT_TO_MAIN_DIR=project_to_main)
   hammer_bat = env_hammer_bat.subst('$COMPONENT_VS_PROJECT_SCRIPT_PATH', raw=1)
 
-  # Project header
-  xml_impl = xml.dom.getDOMImplementation()
-  doc = xml_impl.createDocument(None, 'VisualStudioProject', None)
+  vsp = VSProjectWriter(project_file)
+  vsp.Create(target_name)
 
-  n_root = doc.documentElement
-  n_root.setAttribute('ProjectType', 'Visual C++')
-  n_root.setAttribute('Version', '8.00')
-  n_root.setAttribute('Name', target_name)
-  n_root.setAttribute('ProjectGUID', MakeGuid(target_name))
-  n_root.setAttribute('RootNamespace', target_name)
-  n_root.setAttribute('Keyword', 'MakeFileProj')
-
-  n_platform = doc.createElement('Platforms')
-  n_root.appendChild(n_platform)
-  n = doc.createElement('Platform')
-  n.setAttribute('Name', 'Win32')
-  n_platform.appendChild(n)
-
-  n_root.appendChild(doc.createElement('ToolFiles'))
-
-  # One configuration per build mode supported by this target
-  n_configs = doc.createElement('Configurations')
-  n_root.appendChild(n_configs)
-
+  # Add configuration per build mode supported by this target
   target_path = env['TARGET_PATH']
   for mode, path in target_path.items():
-    n_config = doc.createElement('Configuration')
-    n_config.setAttribute('Name', '%s|Win32' % mode)
-    n_config.setAttribute('OutputDirectory',
-                          '$(ProjectDir)/%s/%s/out' % (mode, target_name))
-    n_config.setAttribute('IntermediateDirectory',
-                          '$(ProjectDir)/%s/%s/tmp' % (mode, target_name))
-    n_config.setAttribute('ConfigurationType', '0')
-    n_configs.appendChild(n_config)
+    attrs = {}
+    attrs['OutputDirectory'] = '$(ProjectDir)/%s/%s/out' % (mode, target_name)
+    attrs['IntermediateDirectory'] = ('$(ProjectDir)/%s/%s/tmp' %
+                                      (mode, target_name))
 
-    n_tool = doc.createElement('Tool')
-    n_tool.setAttribute('Name', 'VCNMakeTool')
-    n_tool.setAttribute('IncludeSearchPath', '')
-    n_tool.setAttribute('ForcedIncludes', '')
-    n_tool.setAttribute('AssemblySearchPath', '')
-    n_tool.setAttribute('ForcedUsingAssemblies', '')
-    n_tool.setAttribute('CompileAsManaged', '')
-    n_tool.setAttribute('PreprocessorDefinitions', '')
+    tool_attrs = {}
     if path:
-      n_tool.setAttribute(
-          'Output', env.RelativePath(target[0].dir, env.Entry(path), sep='/'))
+      tool_attrs['Output'] = env.RelativePath(target[0].dir,
+                                              env.Entry(path), sep='/')
     build_cmd = '%s --mode=%s %s' % (hammer_bat, mode, target_name)
     clean_cmd = '%s --mode=%s -c %s' % (hammer_bat, mode, target_name)
-    n_tool.setAttribute('BuildCommandLine', build_cmd)
-    n_tool.setAttribute('CleanCommandLine', clean_cmd)
-    n_tool.setAttribute('ReBuildCommandLine', clean_cmd + ' && ' + build_cmd)
-    n_config.appendChild(n_tool)
+    tool_attrs['BuildCommandLine'] = build_cmd
+    tool_attrs['CleanCommandLine'] = clean_cmd
+    tool_attrs['ReBuildCommandLine'] = clean_cmd + ' && ' + build_cmd
 
-  n_files = doc.createElement('Files')
-  n_root.appendChild(n_files)
+    vsp.AddConfig(mode, attrs, tool_attrs)
+
   # TODO(rspangler): Fill in files - at least, the .scons file invoking the
   # target.
 
-  n_root.appendChild(doc.createElement('Globals'))
-
-  f = open(project_file, 'wt')
-  doc.writexml(f, encoding='Windows-1252', addindent='  ', newl='\n')
-  f.close()
-
+  # Write project
+  vsp.Write()
   return 0
 
 
@@ -225,6 +335,344 @@
 #------------------------------------------------------------------------------
 
 
+class SourceWalker(object):
+  """Iterator for walking a node tree and collecting sources.
+
+  This is depth-first, children are visited before the parent.  The object
+  can be initialized with any node, and returns the next node on the descent
+  with each Next() call.
+
+  This class does not get caught in node cycles caused, for example, by C
+  header file include loops.
+
+  Based on SCons.Node.Walker.
+  """
+
+  def __init__(self, node, seen, print_interval = 1000):
+    """Initializes the source walker.
+
+    Args:
+      node: Node to start walk from.
+      seen: Set to add seen nodes to, if not None.
+      print_interval: Interval in nodes examined at which to print a progress
+          indicator.
+    """
+    self.interval = print_interval
+    # Put node on stack
+    self.stack = [node]
+    # Scan for node's children, then copy them to node.wkids
+    node.wkids = copy.copy(node.children(scan=1))
+    # Keep track of nodes we've seen (returned)
+    if seen is None:
+      seen = set()
+    self.seen = seen
+    # Add node to history for cycle detection
+    self.history = set()
+    self.history.add(node)
+    # We've seen one node now
+    self.nodes_examined = 1
+    self.unique_nodes = 1
+
+
+  def Next(self):
+    """Get the next node for this walk of the tree.
+
+    Returns:
+      The next node, or None if no more nodes.
+
+    This function is intentionally iterative, not recursive, to sidestep any
+    issues of stack size limitations.
+    """
+    while self.stack:
+      if self.stack[-1].wkids:
+        # Node has children we haven't examined, so iterate into the first
+        # child
+        node = self.stack[-1].wkids.pop(0)
+        if not self.stack[-1].wkids:
+          # No more children of this node
+          self.stack[-1].wkids = None
+        self.nodes_examined += 1
+        if self.interval and not self.nodes_examined % self.interval:
+          self.PrintProgress()
+        if (node not in self.history) and (node not in self.seen):
+          # Haven't hit a cycle or a node we've already seen
+          node.wkids = copy.copy(node.children(scan=1))
+          self.stack.append(node)
+          self.history.add(node)
+      else:
+        # Coming back from iterating, so return the next node on the stack.
+        node = self.stack.pop()
+        self.history.remove(node)
+        self.seen.add(node)
+        self.unique_nodes += 1
+        return node
+    return None
+
+  def PrintProgress(self):
+    """Prints a progress indicator."""
+    print '    Examined %d nodes, found %d unique...' % (
+        self.nodes_examined, self.unique_nodes)
+
+  def WalkAll(self):
+    """Walks all nodes in the the tree."""
+    while self.Next():
+      pass
+    if self.interval:
+      self.PrintProgress()
+
+
+def ComponentVSSourceProjectBuilder(target, source, env):
+  """Visual Studio source project builder.
+
+  Args:
+    target: Destination file.
+    source: List of sources to be added to the target.
+    env: Environment context.
+
+  Returns:
+    Zero if successful.
+  """
+  source = source       # Silence gpylint
+
+  target_name = env['PROJECT_NAME']
+  project_file = target[0].path
+  project_dir = target[0].dir
+
+  # Get list of suffixes to include
+  suffixes = env.SubstList2('$COMPONENT_VS_SOURCE_SUFFIXES')
+
+  # Convert source folders to absolute paths
+  folders = []
+  for f in env['COMPONENT_VS_SOURCE_FOLDERS']:
+    # (folder name, folder abspath, dict of contents)
+    folders.append((f[0], env.Dir(f[1]).abspath, {}))
+
+  # TODO(rspangler): Additional enhancements:
+  # * Should be able to specify paths in folder name (i.e., foo/bar) and
+  #   create the nested folder nodes ('foo' and 'bar')
+  # * Should be tolerant of a folder being specified more than once with
+  #   the same name (probably necessary to support nested folder nodes anyway)
+  # Can probably accomplish both of those by creating a parent fodler dict and
+  # calling WalkFolders() only once.
+  # Create a temporary solution alias to point to all the targets, so we can
+  # make a single call to SourceWalker()
+  tmp_alias = env.Alias('vs_source_project_' + target_name,
+      map(env.Alias, env['COMPONENT_VS_SOURCE_TARGETS']))
+
+  # Scan all targets and add unique nodes to set of sources
+  print '  Scanning dependency tree ...'
+  all_srcs = set()
+  walker = SourceWalker(tmp_alias[0], all_srcs)
+  walker.WalkAll()
+
+  # Walk all sources and build directory trees
+  print '  Building source tree...'
+  for n in all_srcs:
+    if not hasattr(n, 'isfile') or not n.isfile():
+      continue  # Not a file
+    if n.has_builder():
+      continue  # Not a leaf node
+    if n.suffix not in suffixes:
+      continue  # Not a file type we include
+
+    path = n.rfile().abspath
+    for f in folders:
+      if path.startswith(f[1]):
+        if f[0] is None:
+          # Folder name of None is a filter
+          break
+        relpath = path[len(f[1]) + 1:].split(os.sep)
+        folder_dict = f[2]
+        # Recursively add subdirs
+        for pathseg in relpath[:-1]:
+          if pathseg not in folder_dict:
+            folder_dict[pathseg] = {}
+          folder_dict = folder_dict[pathseg]
+        # Add file to last subdir.  No dict, since this isn't a subdir
+        folder_dict[env.RelativePath(project_dir, path)] = None
+        break
+
+  print '  Writing project file...'
+
+  vsp = VSProjectWriter(project_file)
+  vsp.Create(target_name)
+
+  # One configuration for all build modes
+  vsp.AddConfig('all', {}, {})
+
+  # Add files
+  for f in folders:
+    if f[0] is None:
+      continue  # Skip filters
+    vsp.AddFiles(f[0], f[2])
+
+  vsp.Write()
+  return 0
+
+
+def ComponentVSSourceProject(self, project_name, target_names, **kwargs):
+  """Visual Studio source project pseudo-builder.
+
+  Args:
+    self: Environment context.
+    project_name: Name of the project.
+    target_names: List of target names to include source for.
+    kwargs: Optional keyword arguments override environment variables in the
+        derived environment used to create the project.
+
+  Returns:
+    A list of output nodes.
+  """
+  # Builder only works on Windows
+  if sys.platform not in ('win32', 'cygwin'):
+    return []
+
+  # Clone environment and add keyword args
+  env = self.Clone()
+  for k, v in kwargs.items():
+    env[k] = v
+
+  # Save the project name and targets
+  env['PROJECT_NAME'] = project_name
+  env['COMPONENT_VS_SOURCE_TARGETS'] = target_names
+
+  # Call the real builder
+  return env.ComponentVSSourceProjectBuilder(
+      '$COMPONENT_VS_PROJECT_DIR/${PROJECT_NAME}', [])
+
+#------------------------------------------------------------------------------
+
+
+def FindSources(env, dest, source, suffixes=None):
+  """Recursively finds sources and adds them to the destination set.
+
+  Args:
+    env: Environment context.
+    dest: Set to add source nodes to.
+    source: Source file(s) to find.  May be a string, Node, or a list of
+        mixed strings or Nodes.  Strings will be passed through env.Glob() to
+        evaluate wildcards.  If a source evaluates to a directory, the entire
+        directory will be recursively added.
+    suffixes: List of suffixes to include.  If not None, only files with these
+        suffixes will be added to dest.
+  """
+  for source_entry in env.Flatten(source):
+    if type(source_entry) == str:
+      # Search for matches for each source entry
+      source_nodes = env.Glob(source_entry)
+    else:
+      # Source entry is already a file or directory node; no need to glob it
+      source_nodes = [source_entry]
+    for s in source_nodes:
+      if str(s.__class__) == 'SCons.Node.FS.Dir':
+        # Recursively search subdir.  Since glob('*') doesn't match dot files,
+        # also glob('.*').
+        FindSources(env, dest, [s.abspath + '/*', s.abspath + '/.*'], suffixes)
+      elif suffixes and s.suffix in suffixes:
+        dest.add(s)
+
+
+def ComponentVSDirProjectBuilder(target, source, env):
+  """Visual Studio directory project builder.
+
+  Args:
+    target: Destination file.
+    source: List of sources to be added to the target.
+    env: Environment context.
+
+  Returns:
+    Zero if successful.
+  """
+  source = source       # Silence gpylint
+
+  target_name = env['PROJECT_NAME']
+  project_file = target[0].path
+  project_dir = target[0].dir
+
+  # Convert source folders to absolute paths
+  folders = []
+  for f in env['COMPONENT_VS_SOURCE_FOLDERS']:
+    # (folder name, folder abspath, dict of contents)
+    folders.append((f[0], env.Dir(f[1]).abspath, {}))
+
+  # Recursively scan source directories
+  print '  Scanning directories for source...'
+  all_srcs = set()
+  FindSources(env, all_srcs, env['PROJECT_SOURCES'],
+              suffixes=env.SubstList2('$COMPONENT_VS_SOURCE_SUFFIXES'))
+
+  # Walk all sources and build directory trees
+  print '  Building source tree...'
+  for n in all_srcs:
+    # Map addRepository'd source to its real location.
+    path = n.rfile().abspath
+    for f in folders:
+      if path.startswith(f[1]):
+        if f[0] is None:
+          # Folder name of None is a filter
+          break
+        relpath = path[len(f[1]) + 1:].split(os.sep)
+        folder_dict = f[2]
+        # Recursively add subdirs
+        for pathseg in relpath[:-1]:
+          if pathseg not in folder_dict:
+            folder_dict[pathseg] = {}
+          folder_dict = folder_dict[pathseg]
+        # Add file to last subdir.  No dict, since this isn't a subdir
+        folder_dict[env.RelativePath(project_dir, path)] = None
+        break
+
+  print '  Writing project file...'
+
+  vsp = VSProjectWriter(project_file)
+  vsp.Create(target_name)
+
+  # One configuration for all build modes
+  vsp.AddConfig('all', {}, {})
+
+  # Add files
+  for f in folders:
+    if f[0] is None:
+      continue  # Skip filters
+    vsp.AddFiles(f[0], f[2])
+
+  vsp.Write()
+  return 0
+
+
+def ComponentVSDirProject(self, project_name, source, **kwargs):
+  """Visual Studio directory project pseudo-builder.
+
+  Args:
+    self: Environment context.
+    project_name: Name of the project.
+    source: List of source files and/or directories.
+    kwargs: Optional keyword arguments override environment variables in the
+        derived environment used to create the project.
+
+  Returns:
+    A list of output nodes.
+  """
+  # Builder only works on Windows
+  if sys.platform not in ('win32', 'cygwin'):
+    return []
+
+  # Clone environment and add keyword args
+  env = self.Clone()
+  for k, v in kwargs.items():
+    env[k] = v
+
+  # Save the project name and sources
+  env['PROJECT_NAME'] = project_name
+  env['PROJECT_SOURCES'] = source
+
+  # Call the real builder
+  return env.ComponentVSDirProjectBuilder(
+      '$COMPONENT_VS_PROJECT_DIR/${PROJECT_NAME}', [])
+
+#------------------------------------------------------------------------------
+
+
 def ComponentVSSolutionBuilder(target, source, env):
   """Visual Studio solution builder.
 
@@ -242,8 +690,13 @@
   projects = env['SOLUTION_PROJECTS']
   folders = env['SOLUTION_FOLDERS']
 
+  # Scan externally-generated projects
+  external_projects = []
+  for p in source:
+    guid, name = GetGuidAndNameFromVSProject(p.abspath)
+    external_projects.append((p, name, guid))
+
   f = open(solution_file, 'wt')
-
   f.write('Microsoft Visual Studio Solution File, Format Version 9.00\n')
   f.write('# Visual Studio 2005\n')
 
@@ -259,17 +712,19 @@
     ))
 
   # Projects generated elsewhere
-  for p in source:
+  for p, name, guid in external_projects:
     f.write('Project("%s") = "%s", "%s", "%s"\nEndProject\n' % (
         # TODO(rspangler): What if this project isn't type external makefile?
         # How to tell what type it is?
         '{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}',    # External makefile GUID
-        p,                                           # Project name
+        name,                                        # Project name
         env.RelativePath(target[0].dir, p),          # Path to project file
-        GetGuidFromVSProject(p.abspath),             # Project GUID
+        guid,                                        # Project GUID
     ))
 
   # Folders from build groups
+  # TODO(rspangler): Currently no way to add external project (specified in
+  # sources) to a solution folder.
   for folder in folders:
     f.write('Project("%s") = "%s", "%s", "%s"\nEndProject\n' % (
         '{2150E333-8FDC-42A3-9474-1A3956D46DE8}',    # Solution folder GUID
@@ -285,7 +740,19 @@
     f.write('\t\t%s|Win32 = %s|Win32\n' % (mode, mode))
   f.write('\tEndGlobalSection\n')
 
+  # Determine which projects should be enabled
+  # TODO(rspangler): This is somewhat clunky.  DEFAULT_TARGETS is global, and
+  # what we really need is something mode-specific.  In theory we could make
+  # this a mode-specific dict rather than a list, but that'd also be a pain to
+  # populate.
+  # These variable names are also getting REALLY long.  Perhaps we should
+  # define shorter ones (with the default value redirecting to the longer
+  # ones for legacy compatibility).
+  enable_projects = env.SubstList2('$COMPONENT_VS_ENABLED_PROJECTS')
+
   f.write('\tGlobalSection(ProjectConfigurationPlatforms) = postSolution\n')
+
+  # Projects generated by ComponentVSSolution()
   for p in projects:
     for mode in GetTargetModes():
       f.write('\t\t%s.%s|Win32.ActiveCfg = %s|Win32\n' % (
@@ -293,14 +760,43 @@
           mode,           # Solution build configuration
           mode,           # Project build config for that solution config
       ))
+
       t = GetTargets().get(p)
-      if t and mode in t.mode_properties:
+
+      # Determine if project should be enabled in this mode
+      enabled = t and mode in t.mode_properties
+      if enable_projects and p not in enable_projects:
+        # Enable list specified, but target isn't in it
+        # TODO(rspangler): Since we env.Default(scons-out) elsewhere, this
+        # likely causes all projects to be disabled by default.  But that's
+        # realistically better than enabling them all...
+        enabled = False
+
+      if enabled:
         # Target can be built in this mode
         f.write('\t\t%s.%s|Win32.Build.0 = %s|Win32\n' % (
             MakeGuid(p),    # Project GUID
             mode,           # Solution build configuration
             mode,           # Project build config for that solution config
         ))
+
+  # Projects generated elsewhere
+  for p, name, guid in external_projects:
+    for mode in GetTargetModes():
+      f.write('\t\t%s.%s|Win32.ActiveCfg = %s|Win32\n' % (
+          guid,           # Project GUID
+          mode,           # Solution build configuration
+          mode,           # Project build config for that solution config
+      ))
+
+      if name in enable_projects or not enable_projects:
+        # Build target in this mode
+        f.write('\t\t%s.%s|Win32.Build.0 = %s|Win32\n' % (
+            guid,           # Project GUID
+            mode,           # Solution build configuration
+            mode,           # Project build config for that solution config
+        ))
+
   f.write('\tEndGlobalSection\n')
 
   f.write('\tGlobalSection(SolutionProperties) = preSolution\n')
@@ -361,10 +857,13 @@
   target_names = env.SubstList2(target_names)
   env['SOLUTION_TARGETS'] = target_names
 
+  # Save the default targets list as an environment variable
+  env['COMPONENT_VS_SCONS_DEFAULT_TARGETS'] = SCons.Script.DEFAULT_TARGETS
+
+  # Expand target_names into project names, and create project-to-folder
+  # mappings
   project_names = {}
   folders = []
-  # Expand target_names into project names, and create project-to-folder
-  # mappings
   if target_names:
     # Expand target_names into project names
     for target in target_names:
@@ -420,8 +919,10 @@
   # Add pseudo-builders to set up the project and solution builders.  These
   # need to be available on all platforms so that SConscripts which reference
   # them will work.
+  env.AddMethod(ComponentVSDirProject)
   env.AddMethod(ComponentVSProject)
   env.AddMethod(ComponentVSSolution)
+  env.AddMethod(ComponentVSSourceProject)
 
   # If not on Windows, don't do anything else
   if sys.platform not in ('win32', 'cygwin'):
@@ -431,38 +932,66 @@
   env.Tool('gather_inputs')
 
   env.SetDefault(
-      COMPONENT_VS_SOLUTION_DIR='$DESTINATION_ROOT/solution',
       COMPONENT_VS_PROJECT_DIR='$COMPONENT_VS_SOLUTION_DIR/projects',
-      COMPONENT_VS_SOLUTION_SUFFIX='.sln',
-      COMPONENT_VS_PROJECT_SUFFIX='.vcproj',
       COMPONENT_VS_PROJECT_SCRIPT_NAME = 'hammer.bat',
       COMPONENT_VS_PROJECT_SCRIPT_PATH = (
           '$$(ProjectDir)/$VS_PROJECT_TO_MAIN_DIR/'
           '$COMPONENT_VS_PROJECT_SCRIPT_NAME'),
+      COMPONENT_VS_PROJECT_SUFFIX='.vcproj',
+
+      COMPONENT_VS_SOLUTION_DIR='$DESTINATION_ROOT/solution',
+      COMPONENT_VS_SOLUTION_SUFFIX='.sln',
+      COMPONENT_VS_ENABLED_PROJECTS=['$COMPONENT_VS_SCONS_DEFAULT_TARGETS'],
+
+      COMPONENT_VS_SOURCE_SUFFIXES=['$CPPSUFFIXES', '.rc', '.scons'],
+      COMPONENT_VS_SOURCE_FOLDERS=[('source', '$MAIN_DIR')],
   )
 
   AddTargetGroup('all_solutions', 'solutions can be built')
 
   # Add builders
   vcprojaction = SCons.Script.Action(ComponentVSProjectBuilder, varlist=[
+      'COMPONENT_VS_PROJECT_SCRIPT_PATH',
       'TARGET_NAME',
       'TARGET_PATH',
-      'COMPONENT_VS_PROJECT_SCRIPT_PATH',
   ])
   vcprojbuilder = SCons.Script.Builder(
       action=vcprojaction,
       suffix='$COMPONENT_VS_PROJECT_SUFFIX')
 
+  source_vcproj_action = SCons.Script.Action(
+      ComponentVSSourceProjectBuilder, varlist=[
+          'COMPONENT_VS_SOURCE_FOLDERS',
+          'COMPONENT_VS_SOURCE_SUFFIXES',
+          'COMPONENT_VS_SOURCE_TARGETS',
+      ])
+  source_vcproj_builder = SCons.Script.Builder(
+      action=source_vcproj_action,
+      suffix='$COMPONENT_VS_PROJECT_SUFFIX')
+
+  dir_vcproj_action = SCons.Script.Action(
+      ComponentVSDirProjectBuilder, varlist=[
+          'COMPONENT_VS_SOURCE_FOLDERS',
+          'COMPONENT_VS_SOURCE_SUFFIXES',
+          'PROJECT_SOURCES',
+      ])
+  dir_vcproj_builder = SCons.Script.Builder(
+      action=dir_vcproj_action,
+      suffix='$COMPONENT_VS_PROJECT_SUFFIX')
+
   slnaction = SCons.Script.Action(ComponentVSSolutionBuilder, varlist=[
-      'SOLUTION_TARGETS',
+      'COMPONENT_VS_ENABLED_PROJECTS',
       'SOLUTION_FOLDERS',
       'SOLUTION_PROJECTS',
+      'SOLUTION_TARGETS',
   ])
   slnbuilder = SCons.Script.Builder(
       action=slnaction,
       suffix='$COMPONENT_VS_SOLUTION_SUFFIX')
 
   env.Append(BUILDERS={
+      'ComponentVSDirProjectBuilder': dir_vcproj_builder,
       'ComponentVSProjectBuilder': vcprojbuilder,
       'ComponentVSSolutionBuilder': slnbuilder,
+      'ComponentVSSourceProjectBuilder': source_vcproj_builder,
   })