fixed issues with gitsubmodule diffs

rhodecode/lib/diffs.py

@@ -33,8 +33,8 b' from itertools import tee, imap'
 from pylons.i18n.translation import _
 
 from rhodecode.lib.vcs.exceptions import VCSError
-from rhodecode.lib.vcs.nodes import FileNode
-
+from rhodecode.lib.vcs.nodes import FileNode, SubModuleNode
+from rhodecode.lib.helpers import escape
 from rhodecode.lib.utils import EmptyChangeset
 
 
@@ -79,8 +79,12 b' def wrapped_diff(filenode_old, filenode_'
                                'diff menu to display this diff'))
         stats = (0, 0)
         size = 0
-
     if not diff:
+        submodules = filter(lambda o: isinstance(o, SubModuleNode),
+                            [filenode_new, filenode_old])
+        if submodules:
+            diff = wrap_to_table(escape('Submodule %r' % submodules[0]))
+        else:
         diff = wrap_to_table(_('No changes detected'))
 
     cs1 = filenode_old.changeset.raw_id
@@ -97,6 +101,10 b' def get_gitdiff(filenode_old, filenode_n'
     """
     # make sure we pass in default context
     context = context or 3
+    submodules = filter(lambda o: isinstance(o, SubModuleNode),
+                        [filenode_new, filenode_old])
+    if submodules:
+        return ''
 
     for filenode in (filenode_old, filenode_new):
         if not isinstance(filenode, FileNode):
@@ -109,7 +117,6 b' def get_gitdiff(filenode_old, filenode_n'
 
     vcs_gitdiff = repo.get_diff(old_raw_id, new_raw_id, filenode_new.path,
                                  ignore_whitespace, context)
-
     return vcs_gitdiff
 
 

rhodecode/lib/vcs/backends/git/changeset.py

@@ -364,11 +364,18 b' class GitChangeset(BaseChangeset):'
         path = self._fix_path(path)
         if not path in self.nodes:
             try:
-                id = self._get_id_for_path(path)
+                id_ = self._get_id_for_path(path)
             except ChangesetError:
                 raise NodeDoesNotExistError("Cannot find one of parents' "
                     "directories for a given path: %s" % path)
-            obj = self.repository._repo.get_object(id)
+
+            als = self.repository.alias
+            _GL = lambda m: m and objects.S_ISGITLINK(m)
+            if _GL(self._stat_modes.get(path)):
+                node = SubModuleNode(path, url=None, changeset=id_, alias=als)
+            else:
+                obj = self.repository._repo.get_object(id_)
+
             if isinstance(obj, objects.Tree):
                 if path == '':
                     node = RootNode(changeset=self)
@@ -423,7 +430,6 b' class GitChangeset(BaseChangeset):'
                         line))
                 _path = splitted[1].strip()
                 paths.add(_path)
-
         return sorted(paths)
 
     @LazyProperty

rhodecode/lib/vcs/nodes.py

@@ -19,6 +19,7 b' from rhodecode.lib.vcs.utils.lazy import'
 from rhodecode.lib.vcs.utils import safe_unicode, safe_str
 from rhodecode.lib.vcs.exceptions import NodeError
 from rhodecode.lib.vcs.exceptions import RemovedFileNodeError
+from rhodecode.lib.utils import EmptyChangeset
 
 
 class NodeKind:
@@ -576,16 +577,26 b' class SubModuleNode(Node):'
     """
     represents a SubModule of Git or SubRepo of Mercurial
     """
+    is_binary = False
+    size = 0
+
     def __init__(self, name, url=None, changeset=None, alias=None):
         self.path = name
         self.kind = NodeKind.SUBMODULE
         self.alias = alias
-        # changeset MUST be STR !! since it can point to non-valid SCM
-        self.changeset = str(changeset)
+        # we have to use emptyChangeset here since this can point to svn/git/hg
+        # submodules we cannot get from repository
+        self.changeset = EmptyChangeset(str(changeset), alias=alias)
         self.url = url or self._extract_submodule_url()
 
+    def __repr__(self):
+        return '<%s %r @ %s>' % (self.__class__.__name__, self.path,
+                                 self.changeset.short_id)
+
     def _extract_submodule_url(self):
         if self.alias == 'git':
+            #TODO: find a way to parse gits submodule file and extract the
+            # linking URL
             return self.path
         if self.alias == 'hg':
             return self.path
@@ -597,4 +608,4 b' class SubModuleNode(Node):'
         then only last part is returned.
         """
         org = safe_unicode(self.path.rstrip('/').split('/')[-1])
-        return u'%s @ %s' % (org, self.changeset[:12])
+        return u'%s @ %s' % (org, self.changeset.short_id)