extensions: add wrappedfunction() context manager Several extensions exist that temporarily want to wrap a function (at least narrowhg, any many of the extensions in hg-experimental). That's why we have the unwrapfunction() that was introduced in 19578bb84731 (extensions: add unwrapfunction to undo wrapfunction, 2016-08-10). This patch adds a simple wrappedfunction() that returns a context manager. Differential Revision: https://phab.mercurial-scm.org/D472

mdiff: add a --ignore-space-at-eol option Add an option that only ignores whitespaces at EOL. The name of the option is the same as Git. .. feature:: Added `--ignore-space-at-eol` diff option to ignore whitespace differences at line endings. Differential Revision: https://phab.mercurial-scm.org/D422

revset: improve documentation about ordering handling The old documentation is a bit confusing. Namely, it's unclear whether `define` means "I should ALWAYS define a new order", or "I should SOMETIMES define a new order", and if it's the latter, what's the difference between `define` and `any`? This patch clarifies that and adds more examples. Differential Revision: https://phab.mercurial-scm.org/D523

revset: remove order information from tree (API) Keeping `order` in tree makes AST operation harder. And there could be invalid cases if trees could be generated and compounded freely, like: SetA(order=define) & SetB(order=define) ^^^^^^ couldn't be satisfied This patch changes the code to calculate order on the fly, during tree traversal. Optimization of reordering `and` arguments is preserved by introducing a new internal operation `flipand`. .. api:: revset.stringset() now takes 'order' as the last argument. Differential Revision: https://phab.mercurial-scm.org/D451

revset: drop optimization about reordering "or" set elements The reordering optimization is more important for "and" than "or", given the implementation details about "addset" and "filteredset" - reordering "or" may help "__contains__" test but not iteration, reordering "and" could help both. We are going to simplify the tree to remove ordering information. Removing "or" reordering optimization would make things simpler. This effectively reverts c63cb2d10d6d. It tracks back to the "orset" function added by the initial commit of revset (c9ce8ecd6). In the future, we might consider optimization at runtime (ex. do reordering and rewrites inside "orset"). Differential Revision: https://phab.mercurial-scm.org/D561

rebase: use _ctxdesc in one more place This simplifies the code. Differential Revision: https://phab.mercurial-scm.org/D566

rebase: move working parent and bookmark for obsoleted revs (BC) Previously, obsoleted revs with successors in destination are completely ignored. That caused some inconvenience when working copy is obsoleted. Most commands avoid working copy being obsoleted, but `hg pull` is an exception. This patch makes rebase able to move bookmarks or working parent for those obsoleted revs. It does so by keeping the obsoleted revs in `state` and marking them as "skipped, rebased to desired destination" during run-time. This reverts part of the behavior change of 3b7cb3d17137 and D24. Differential Revision: https://phab.mercurial-scm.org/D527

rebase: remove an unnecessary adjustdest in clearrebased `rev` being "skipped" could currently be caused by moving `rev` does not create a new commit. In this case, `state[rev]` is already changed to `p1`, and is a sane destination for bookmark or working parent movement. Therefore an additional destination adjustment is unnecessary. Differential Revision: https://phab.mercurial-scm.org/D565

rebase: sort destmap topologically Previously rebase source and destination could not overlap. But with the multi-destination support, source and destination could reasonably partially overlap. That requires another topological sort on `{sourcerev: destrev}` graph (destmap). This patch implements that. If a revision's destination is itself, the error message gets changed from "source is ancestor of destination" to "source and destination form a cycle". Not marking as BC since automation should depend on exit code, not error message. Differential Revision: https://phab.mercurial-scm.org/D470

rebase: initial support for multiple destinations This patch defines `SRC` (a single source revision) and `ALLSRC` (all source revisions) to be valid names in `--dest` revset if `--src` or `--rev` is used. So destination could be defined differently according to source revisions. The names are capitalized to make it clear they are "dynamically defined", distinguishable from normal revsets (Thanks Augie for the suggestion). This is useful, for example, `-r 'orphan()' -d 'calc-dest(SRC)'` to solve instability, which seems to be a highly wanted feature. The feature is not completed, namely if `-d` overlaps with `-r`, things could go wrong. A later patch will handle that case. The feature is also gated by `experimental.rebase.multidest` config option which is default off. Differential Revision: https://phab.mercurial-scm.org/D469