How to show the diff specific to a named branch in mercurial

Question

Assuming I have a named branch foo with two commits a, b:

      a       b       c  
------o-------o-------o------- # default
       \\          d         e
              


        

Answer 1

You can do it using revsets.

In your specific example I think you could get a list of of just d and e using:

hg log -r "branch('foo') - branch('default')"

where that - is defined as:

"x - y"
      Changesets in x but not in y.

Getting the diff from a to e could be done as:

hg diff -r "ancestor(default, foo)" -r foo

though there's possibly a shorthand for that I'm not seeing.