1 files changed, 55 insertions, 5 deletions
diff --git a/tools/buildgen/plugins/expand_filegroups.py b/tools/buildgen/plugins/expand_filegroups.py
index 14cb616027..477e69c869 100755
--- a/tools/buildgen/plugins/expand_filegroups.py
+++ b/tools/buildgen/plugins/expand_filegroups.py
@@ -42,7 +42,22 @@ def excluded(filename, exclude_res):
   return False
 
 
-FILEGROUP_LISTS = ['src', 'headers', 'public_headers']
+def uniquify(lst):
+  out = []
+  for el in lst:
+    if el not in out:
+      out.append(el)
+  return out
+
+
+FILEGROUP_LISTS = ['src', 'headers', 'public_headers', 'deps']
+
+
+FILEGROUP_DEFAULTS = {
+  'language': 'c',
+  'boringssl': False,
+  'zlib': False,
+}
 
 
 def mako_plugin(dictionary):
@@ -54,10 +69,19 @@ def mako_plugin(dictionary):
 
   """
   libs = dictionary.get('libs')
+  targets = dictionary.get('targets')
   filegroups_list = dictionary.get('filegroups')
   filegroups = {}
 
-  todo = filegroups_list[:]
+  for fg in filegroups_list:
+    for lst in FILEGROUP_LISTS:
+      fg[lst] = fg.get(lst, [])
+      fg['own_%s' % lst] = list(fg[lst])
+    for attr, val in FILEGROUP_DEFAULTS.iteritems():
+      if attr not in fg:
+        fg[attr] = val
+
+  todo = list(filegroups_list)
   skips = 0
 
   while todo:
@@ -91,14 +115,40 @@ def mako_plugin(dictionary):
       cur['plugins'] = plugins
       filegroups[cur['name']] = cur
 
+  # build reverse dependency map
+  things = {}
+  for thing in dictionary['libs'] + dictionary['targets'] + dictionary['filegroups']:
+    things[thing['name']] = thing
+    thing['used_by'] = []
+  thing_deps = lambda t: t.get('uses', []) + t.get('filegroups', []) + t.get('deps', [])
+  for thing in things.itervalues():
+    done = set()
+    todo = thing_deps(thing)
+    while todo:
+      cur = todo[0]
+      todo = todo[1:]
+      if cur in done: continue
+      things[cur]['used_by'].append(thing['name'])
+      todo.extend(thing_deps(things[cur]))
+      done.add(cur)
+
   # the above expansion can introduce duplicate filenames: contract them here
   for fg in filegroups.itervalues():
     for lst in FILEGROUP_LISTS:
-      fg[lst] = sorted(list(set(fg.get(lst, []))))
+      fg[lst] = uniquify(fg.get(lst, []))
 
-  for lib in libs:
+  for tgt in dictionary['targets']:
+    for lst in FILEGROUP_LISTS:
+      tgt[lst] = tgt.get(lst, [])
+      tgt['own_%s' % lst] = list(tgt[lst])
+
+  for lib in libs + targets:
     assert 'plugins' not in lib
     plugins = []
+    for lst in FILEGROUP_LISTS:
+      vals = lib.get(lst, [])
+      lib[lst] = list(vals)
+      lib['own_%s' % lst] = list(vals)
     for fg_name in lib.get('filegroups', []):
       fg = filegroups[fg_name]
       for plugin in fg['plugins']:
@@ -113,4 +163,4 @@ def mako_plugin(dictionary):
       lib['src'].append('src/core/plugin_registry/%s_plugin_registry.c' %
                         lib['name'])
     for lst in FILEGROUP_LISTS:
-      lib[lst] = sorted(list(set(lib.get(lst, []))))
+      lib[lst] = uniquify(lib.get(lst, []))