dirstate: rename forget to drop

It has substantially different semantics from forget at the command
layer, so change it to avoid confusion.

We can't simply combine it with remove because we need to explicitly
drop non-added files in some cases like commit.

hgext/mq.py

@@ -1302,7 +1302,7 b' class queue(object):'
                     except OSError, e:
                         if e.errno != errno.ENOENT:
                             raise
-                    repo.dirstate.forget(f)
+                    repo.dirstate.drop(f)
                 for f in m + r:
                     fctx = ctx[f]
                     repo.wwrite(f, fctx.data(), fctx.flags())
@@ -1480,7 +1480,7 b' class queue(object):'
                 for f in mm:
                     repo.dirstate.normallookup(f)
                 for f in forget:
-                    repo.dirstate.forget(f)
+                    repo.dirstate.drop(f)
 
                 if not msg:
                     if not ph.message:
@@ -2617,7 +2617,7 b' def rename(ui, repo, patch, name=None, *'
         wlock = r.wlock()
         try:
             if r.dirstate[patch] == 'a':
-                r.dirstate.forget(patch)
+                r.dirstate.drop(patch)
                 r.dirstate.add(name)
             else:
                 if r.dirstate[name] == 'r':

mercurial/commands.py

@@ -4264,7 +4264,7 b' def revert(ui, repo, *pats, **opts):'
             audit_path = scmutil.pathauditor(repo.root)
             for f in remove[0]:
                 if repo.dirstate[f] == 'a':
-                    repo.dirstate.forget(f)
+                    repo.dirstate.drop(f)
                     continue
                 audit_path(f)
                 try:

mercurial/context.py

@@ -842,7 +842,7 b' class workingctx(changectx):'
                 if self._repo.dirstate[f] != 'a':
                     self._repo.ui.warn(_("%s not added!\n") % f)
                 else:
-                    self._repo.dirstate.forget(f)
+                    self._repo.dirstate.drop(f)
         finally:
             wlock.release()
 
@@ -863,7 +863,7 b' class workingctx(changectx):'
                             raise
             for f in list:
                 if self._repo.dirstate[f] == 'a':
-                    self._repo.dirstate.forget(f)
+                    self._repo.dirstate.drop(f)
                 elif f not in self._repo.dirstate:
                     self._repo.ui.warn(_("%s not tracked!\n") % f)
                 else:

mercurial/dirstate.py

@@ -365,14 +365,11 b' class dirstate(object):'
         if f in self._copymap:
             del self._copymap[f]
 
-    def forget(self, f):
-        '''Forget a file.'''
+    def drop(self, f):
+        '''Drop a file from the dirstate'''
         self._dirty = True
-        try:
-            self._droppath(f)
-            del self._map[f]
-        except KeyError:
-            self._ui.warn(_("not in dirstate: %s\n") % f)
+        self._droppath(f)
+        del self._map[f]
 
     def _normalize(self, path, isknown):
         normed = os.path.normcase(path)

mercurial/localrepo.py

@@ -1037,7 +1037,7 b' class localrepository(repo.repository):'
             for f in changes[0] + changes[1]:
                 self.dirstate.normal(f)
             for f in changes[2]:
-                self.dirstate.forget(f)
+                self.dirstate.drop(f)
             self.dirstate.setparents(ret)
             ms.reset()
         finally:

mercurial/merge.py

@@ -390,12 +390,12 b' def recordupdates(repo, action, branchme'
             if branchmerge:
                 repo.dirstate.remove(f)
             else:
-                repo.dirstate.forget(f)
+                repo.dirstate.drop(f)
         elif m == "a": # re-add
             if not branchmerge:
                 repo.dirstate.add(f)
         elif m == "f": # forget
-            repo.dirstate.forget(f)
+            repo.dirstate.drop(f)
         elif m == "e": # exec change
             repo.dirstate.normallookup(f)
         elif m == "g": # get
@@ -425,7 +425,7 b' def recordupdates(repo, action, branchme'
                 if f2 == fd: # file not locally copied/moved
                     repo.dirstate.normallookup(fd)
                 if move:
-                    repo.dirstate.forget(f)
+                    repo.dirstate.drop(f)
         elif m == "d": # directory rename
             f2, fd, flag = a[2:]
             if not f2 and f not in repo.dirstate:
@@ -441,7 +441,7 b' def recordupdates(repo, action, branchme'
             else:
                 repo.dirstate.normal(fd)
                 if f:
-                    repo.dirstate.forget(f)
+                    repo.dirstate.drop(f)
 
 def update(repo, node, branchmerge, force, partial, ancestor=None):
     """