Summary:
This change adds a `--restack` option to `hg rebase`. When invoked, the command will rebase all descendants of precursors of the current changeset onto the current changeset. This is similar to the behavior of `hg evolve --all`, except it only handles unstable changesets, and not other issues that can arise from shared mutable history such as divergence or bumping.
I've been playing around with some of the more advanced features (such as allowing the command to be run from anywhere in the old stack or new stack, as well as allowing the user to specify the number of changesets to rebase), but I wanted to upload the most simple iteration of this command for feedback.
Test Plan:
See unit tests for complete commands.
1. Create a stack of commits.
2. Somewhere in the middle of the stack, amend a commit, potentially several times.
3. Run `hg rebase --restack`.
4. The top half of the stack should be rebased onto the amended commit, and the preamend bookmark should be gone.
Reviewers: #sourcecontrol, durham
Reviewed By: durham
Subscribers: rmcelroy, quark, mjpieters
Differential Revision: https://phabricator.intern.facebook.com/D3972103
Tasks: 13651947
Signature: t1:3972103:1476230834:8f77eac4e8d8681dd9f8125747c1ff75c8da1ad8
a154bbaeb0