Add revlog.LookupError exception, and use it instead of RevlogError.

Remove repo.LookupError, which devolves to the revlog version.

mercurial/bundlerepo.py

@@ -49,7 +49,7 b' class bundlerevlog(revlog.revlog):'
                 continue
             for p in (p1, p2):
                 if not p in self.nodemap:
-                    raise revlog.RevlogError(_("unknown parent %s") % short(p1))
+                    raise revlog.LookupError(_("unknown parent %s") % short(p1))
             if linkmapper is None:
                 link = n
             else:

mercurial/commands.py

@@ -2450,9 +2450,10 b' def tags(ui, repo):'
     hexfunc = ui.debugflag and hex or short
     for t, n in l:
         try:
+	    hn = hexfunc(n)
             r = "%5d:%s" % (repo.changelog.rev(n), hexfunc(n))
-        except KeyError:
-            r = "    ?:?"
+        except revlog.LookupError:
+            r = "    ?:%s" % hn
         if ui.quiet:
             ui.write("%s\n" % t)
         else:

mercurial/context.py

@@ -83,13 +83,13 b' class changectx(object):'
             try:
                 return self._manifest[path]
             except KeyError:
-                raise repo.LookupError(_("'%s' not found in manifest") % path)
+                raise revlog.LookupError(_("'%s' not found in manifest") % path)
         if '_manifestdelta' in self.__dict__ or path in self.files():
             if path in self._manifestdelta:
                 return self._manifestdelta[path]
         node, flag = self._repo.manifest.find(self._changeset[0], path)
         if not node:
-            raise repo.LookupError(_("'%s' not found in manifest") % path)
+            raise revlog.LookupError(_("'%s' not found in manifest") % path)
 
         return node
 
@@ -149,13 +149,10 b' class filectx(object):'
             self._changeid = self._filelog.linkrev(self._filenode)
             return self._changeid
         elif name == '_filenode':
-            try:
-                if '_fileid' in self.__dict__:
-                    self._filenode = self._filelog.lookup(self._fileid)
-                else:
-                    self._filenode = self._changectx.filenode(self._path)
-            except revlog.RevlogError, inst:
-                raise repo.LookupError(str(inst))
+	    if '_fileid' in self.__dict__:
+		self._filenode = self._filelog.lookup(self._fileid)
+	    else:
+		self._filenode = self._changectx.filenode(self._path)
             return self._filenode
         elif name == '_filerev':
             self._filerev = self._filelog.rev(self._filenode)
@@ -167,7 +164,7 b' class filectx(object):'
         try:
             n = self._filenode
             return True
-        except repo.LookupError:
+        except revlog.LookupError:
             # file is missing
             return False
 

mercurial/localrepo.py

@@ -317,7 +317,7 b' class localrepository(repo.repository):'
             rev = c.rev()
             try:
                 fnode = c.filenode('.hgtags')
-            except repo.LookupError:
+            except revlog.LookupError:
                 continue
             ret.append((rev, node, fnode))
             if fnode in last:

mercurial/repo.py

@@ -9,9 +9,6 b''
 class RepoError(Exception):
     pass
 
-class LookupError(RepoError):
-    pass
-
 class repository(object):
     def capable(self, name):
         '''tell whether repo supports named capability.

mercurial/revlog.py

@@ -281,6 +281,7 b' class lazymap(object):'
         del self.p.map[key]
 
 class RevlogError(Exception): pass
+class LookupError(RevlogError): pass
 
 class revlog(object):
     """
@@ -471,7 +472,7 b' class revlog(object):'
         try:
             return self.nodemap[node]
         except KeyError:
-            raise RevlogError(_('%s: no node %s') % (self.indexfile, hex(node)))
+            raise LookupError(_('%s: no node %s') % (self.indexfile, hex(node)))
     def linkrev(self, node):
         return (node == nullid) and nullrev or self.index[self.rev(node)][-4]
     def parents(self, node):
@@ -766,7 +767,7 b' class revlog(object):'
                 node = id
                 r = self.rev(node) # quick search the index
                 return node
-            except RevlogError:
+            except LookupError:
                 pass # may be partial hex id
         try:
             # str(rev)
@@ -795,7 +796,7 b' class revlog(object):'
                 for n in self.nodemap:
                     if n.startswith(bin_id) and hex(n).startswith(id):
                         if node is not None:
-                            raise RevlogError(_("Ambiguous identifier"))
+                            raise LookupError(_("Ambiguous identifier"))
                         node = n
                 if node is not None:
                     return node
@@ -815,7 +816,7 b' class revlog(object):'
         if n:
             return n
 
-        raise RevlogError(_("No match found"))
+        raise LookupError(_("No match found"))
 
     def cmp(self, node, text):
         """compare text with a given file revision"""
@@ -1155,13 +1156,13 b' class revlog(object):'
 
             for p in (p1, p2):
                 if not p in self.nodemap:
-                    raise RevlogError(_("unknown parent %s") % short(p))
+                    raise LookupError(_("unknown parent %s") % short(p))
 
             if not chain:
                 # retrieve the parent revision of the delta chain
                 chain = p1
                 if not chain in self.nodemap:
-                    raise RevlogError(_("unknown base %s") % short(chain[:4]))
+                    raise LookupError(_("unknown base %s") % short(chain[:4]))
 
             # full versions are inserted when the needed deltas become
             # comparable to the uncompressed text or when the previous