rebase: delete seemingly unnecessary needupdate() This seemed to be about checking that the user hasn't updated away when we asked them to resolve merge conflicts. These days we call `cmdutil.checkunfinished()` and refuse to update, so the user shouldn't be able to get into this state. `test-rebase-interruptions.t` actually has some tests where it disables the rebase extension in order to be allowed to do some of these updates. That still passes, but I wouldn't personally haved cared if that failed. Differential Revision: https://phab.mercurial-scm.org/D7825

workingctx: move setparents() logic from localrepo to mirror overlayworkingctx It would be nice to later be able to call `wctx.setparents()` whether `wctx` is a `workingctx` or an `overlayworkingctx`. Differential Revision: https://phab.mercurial-scm.org/D7823

overlayworkginctx: implement a setparents() to mirror dirstate.setparents() This lets us make the in-memory and on-disk code a bit more similar. I'll soon also implement setparents() on the regular workingctx. Differential Revision: https://phab.mercurial-scm.org/D7822

overlayworkingctx: default branch to base context's branch This matches what the dirstate does (it reuses working copy parent's branch unless told otherwise). By moving the default out of `rebase.commitmemorynode()`, it will let us clean that up better later. Differential Revision: https://phab.mercurial-scm.org/D7821

grep: speed up `hg grep --all-files some/path` by using ctx.matches(match) ctx.matches(match) avoids walking unintersting parts of the tree when using tree manifests. That can make a very big difference when grepping in a small subset of the tree (2.0s -> 0.7s in my case, but can of course be made more extreme by picking a smaller subset of files). Differential Revision: https://phab.mercurial-scm.org/D7820

py3: byteify the opener option to use `rust.index` to allow Rust revlogs It looks like this corresponds to the byteified key written in localrepo in 8042856c90b6. Differential Revision: https://phab.mercurial-scm.org/D7818

graft: use revset for intersecting with ancestor set This addresses a TODO added in a1381eea7c7d (graft: do not use `.remove` on a smart set (regression), 2014-04-28). Differential Revision: https://phab.mercurial-scm.org/D7806

graft: don't remove from a list in a loop This addresses a TODO added in a1381eea7c7d (graft: do not use `.remove` on a smart set (regression), 2014-04-28). I couldn't measure any speedup. Differential Revision: https://phab.mercurial-scm.org/D7805

tests: avoid grafting the same change over and over The test case added in a1381eea7c7d (graft: do not use `.remove` on a smart set (regression), 2014-04-28) added a test case that grafted the same change (renaming 'a' to 'b') three times over. It had description "graft works on complex revset", but AFACT, all that it cared about was that some ancestor of the working copy was in the set of revisions to graft. So this patch changes the test to do that instead. (I plan to later make it so that grafting these renames on top of each won't create the empty commits they currently create.) Differential Revision: https://phab.mercurial-scm.org/D7804

py3: byteify some `ui.configbool()` parameters This popped up in 8042856c90b6. Differential Revision: https://phab.mercurial-scm.org/D7817