commands: add more robust support for 'hg log -b' (issue2078) Fixes issue2078 and adds tests to cover various 'hg log -b' uses. This change adds a localrepo.lookupbranch(key, remote=None) function. This will look up the branch of the revision with the given key. The algorithm works like this: * If a remote repo is given and KEY is the name of a branch in that repo, return KEY. * If no remote repo is given and KEY is the name of a branch in the local repo object, return KEY. * Otherwise look up the revision with the identifier KEY in the local repo and return its branch. This change also makes 'hg log -b' use this new functionality and adds a few tests for it.

--- a/mercurial/commands.py	Mon Apr 19 16:47:44 2010 -0500
+++ b/mercurial/commands.py	Mon Apr 12 19:33:25 2010 -0400
@@ -2160,6 +2160,7 @@
         df = util.matchdate(opts["date"])
 
     opts['branch'] += opts.get('only_branch')
+    opts['branch'] = [repo.lookupbranch(b) for b in opts['branch']]
 
     displayer = cmdutil.show_changeset(ui, repo, opts, True, matchfn)
     def prep(ctx, fns):