restore branch after rollback (issue 902)

mercurial/localrepo.py

@@ -525,9 +525,11 b' class localrepository(repo.repository):'
         except IOError:
             ds = ""
         self.opener("journal.dirstate", "w").write(ds)
+        self.opener("journal.branch", "w").write(self.dirstate.branch())
 
         renames = [(self.sjoin("journal"), self.sjoin("undo")),
-                   (self.join("journal.dirstate"), self.join("undo.dirstate"))]
+                   (self.join("journal.dirstate"), self.join("undo.dirstate")),
+                   (self.join("journal.branch"), self.join("undo.branch"))]
         tr = transaction.transaction(self.ui.warn, self.sopener,
                                        self.sjoin("journal"),
                                        aftertrans(renames))
@@ -557,6 +559,8 b' class localrepository(repo.repository):'
                 self.ui.status(_("rolling back last transaction\n"))
                 transaction.rollback(self.sopener, self.sjoin("undo"))
                 util.rename(self.join("undo.dirstate"), self.join("dirstate"))
+                branch = self.opener("undo.branch").read()
+                self.dirstate.setbranch(branch)
                 self.invalidate()
                 self.dirstate.invalidate()
             else:

tests/test-hup.out

@@ -4,4 +4,4 b' adding changesets'
 transaction abort!
 rollback completed
 killed!
-.hg/00changelog.i .hg/journal.dirstate .hg/requires .hg/store .hg/store/00changelog.i .hg/store/00changelog.i.a
+.hg/00changelog.i .hg/journal.branch .hg/journal.dirstate .hg/requires .hg/store .hg/store/00changelog.i .hg/store/00changelog.i.a

tests/test-rollback

@@ -13,3 +13,9 b' hg rollback'
 hg verify
 hg parents
 hg status
+
+# Test issue 902
+hg commit -m "test"
+hg branch test
+hg rollback
+hg branch

tests/test-rollback.out

@@ -16,3 +16,6 b' crosschecking files in changesets and ma'
 checking files
 0 files, 0 changesets, 0 total revisions
 A a
+marked working directory as branch test
+rolling back last transaction
+default