位置和HashLocationStrategy在beta.16中停止工作(Location and HashLocationStrategy stopped working in beta.16)

 感谢revset的例子。 我绕了一圈，找到了我喜欢的解决方案： 
 
hg log -r "parents(min(branch(foo)))"
 
 它将打印foo分支上第一次提交的修订版本。 您可以在该变更集中查找分支（或缺少指示默认分支），这是foo的父分支（至少在问题中定义父分支的方式）。 
 
 但我有这种唠叨的感觉......父母（）可能会返回多个变更集。 一个分支上的第一次提交可以有两个父母吗？ 我想不出会发生什么。 

Thanks for the revset examples. I fiddled around and found this solution that I kind of like:
 
hg log -r "parents(min(branch(foo)))"
 
which will print the revision that the first commit on the foo branch was based on. You can look for the branch (or lack thereof indicating the default branch) in that changeset and that is the parent branch of foo (at least the way parent branch is defined in the question).
 
But I have this nagging feeling...parents() could return more than one changeset. Could the first commit on a branch ever have two parents? I can't think of how that could happen.