Is there a way to detect if changes from a branch has been indirectly merged with another?

Let's say we have three named branches A, B and C. Is there a (non ocular) way to detect that changes from C has made it 开发者_运维百科into A?

A ----------------------------
  | \              /
B |  \------------/
  |           /
C  \---------/ -------  

Starting with Mercurial 1.6.0, you can use revsets to find this:

hg log -r "ancestors(A) and branch(C)"

This shows all the ancestors of A that are on the C branch. You can use templating to extract exactly the information you need from the log entries.

See hg help revsets for full details.