--- a/mercurial/commands.py	Sat Apr 17 14:32:26 2010 +0200
+++ b/mercurial/commands.py	Sun Apr 18 18:18:19 2010 -0400
@@ -2157,6 +2157,8 @@
     if opts["date"]:
         df = util.matchdate(opts["date"])
 
+    opts['branch'] += opts.get('only_branch')
+
     displayer = cmdutil.show_changeset(ui, repo, opts, True, matchfn)
     def prep(ctx, fns):
         rev = ctx.rev()
@@ -2166,7 +2168,7 @@
             return
         if opts.get('only_merges') and len(parents) != 2:
             return
-        if opts.get('only_branch') and ctx.branch() not in opts['only_branch']:
+        if opts.get('branch') and ctx.branch() not in opts['branch']:
             return
         if df and not df(ctx.date()[0]):
             return
@@ -3739,8 +3741,10 @@
           ('', 'removed', None, _('include revisions where files were removed')),
           ('m', 'only-merges', None, _('show only merges')),
           ('u', 'user', [], _('revisions committed by user')),
-          ('b', 'only-branch', [],
-            _('show only changesets within the given named branch')),
+          ('', 'only-branch', [],
+            _('show only changesets within the given named branch (DEPRECATED)')),
+          ('b', 'branch', [],
+            _('show changesets within the given named branch')),
           ('P', 'prune', [],
            _('do not display revision or any of its ancestors')),
          ] + logopts + walkopts,

--- a/tests/test-debugcomplete.out	Sat Apr 17 14:32:26 2010 +0200
+++ b/tests/test-debugcomplete.out	Sun Apr 18 18:18:19 2010 -0400
@@ -171,7 +171,7 @@
 export: output, switch-parent, rev, text, git, nodates
 forget: include, exclude
 init: ssh, remotecmd
-log: follow, follow-first, date, copies, keyword, rev, removed, only-merges, user, only-branch, prune, patch, git, limit, no-merges, style, template, include, exclude
+log: follow, follow-first, date, copies, keyword, rev, removed, only-merges, user, only-branch, branch, prune, patch, git, limit, no-merges, style, template, include, exclude
 merge: force, rev, preview
 pull: update, force, rev, branch, ssh, remotecmd
 push: force, rev, branch, ssh, remotecmd

--- a/tests/test-log	Sat Apr 17 14:32:26 2010 +0200
+++ b/tests/test-log	Sun Apr 18 18:18:19 2010 -0400
@@ -135,4 +135,34 @@
 hg log -u "user1" -u "user2"
 hg log -u "user3"
 
+cd ..
+
+hg init branches
+cd branches
+
+echo a > a
+hg ci -A -m "commit on default"
+hg branch test
+echo b > b
+hg ci -A -m "commit on test"
+
+hg up default
+echo c > c
+hg ci -A -m "commit on default"
+hg up test
+echo c > c
+hg ci -A -m "commit on test"
+
+echo '% log -b default'
+hg log -b default
+
+echo '% log -b test'
+hg log -b test
+
+echo '% log -b dummy'
+hg log -b dummy
+
+echo '% log -b default -b test'
+hg log -b default -b test
+
 exit 0

--- a/tests/test-log.out	Sat Apr 17 14:32:26 2010 +0200
+++ b/tests/test-log.out	Sun Apr 18 18:18:19 2010 -0400
@@ -324,3 +324,65 @@
 date:        Thu Jan 01 00:00:00 1970 +0000
 summary:     a
 
+adding a
+marked working directory as branch test
+adding b
+0 files updated, 0 files merged, 1 files removed, 0 files unresolved
+adding c
+created new head
+1 files updated, 0 files merged, 1 files removed, 0 files unresolved
+adding c
+% log -b default
+changeset:   2:c3a4f03cc9a7
+parent:      0:24427303d56f
+user:        test
+date:        Thu Jan 01 00:00:00 1970 +0000
+summary:     commit on default
+
+changeset:   0:24427303d56f
+user:        test
+date:        Thu Jan 01 00:00:00 1970 +0000
+summary:     commit on default
+
+% log -b test
+changeset:   3:f5d8de11c2e2
+branch:      test
+tag:         tip
+parent:      1:d32277701ccb
+user:        test
+date:        Thu Jan 01 00:00:00 1970 +0000
+summary:     commit on test
+
+changeset:   1:d32277701ccb
+branch:      test
+user:        test
+date:        Thu Jan 01 00:00:00 1970 +0000
+summary:     commit on test
+
+% log -b dummy
+% log -b default -b test
+changeset:   3:f5d8de11c2e2
+branch:      test
+tag:         tip
+parent:      1:d32277701ccb
+user:        test
+date:        Thu Jan 01 00:00:00 1970 +0000
+summary:     commit on test
+
+changeset:   2:c3a4f03cc9a7
+parent:      0:24427303d56f
+user:        test
+date:        Thu Jan 01 00:00:00 1970 +0000
+summary:     commit on default
+
+changeset:   1:d32277701ccb
+branch:      test
+user:        test
+date:        Thu Jan 01 00:00:00 1970 +0000
+summary:     commit on test
+
+changeset:   0:24427303d56f
+user:        test
+date:        Thu Jan 01 00:00:00 1970 +0000
+summary:     commit on default
+