rebase: make sure we don't loose the return code in --confirm option return _dorebase() to make sure it returns 'return code'. Differential Revision: https://phab.mercurial-scm.org/D3938

rebase: use revnums (not nodes) for set of extinct revisions There is no need to convert extinct revisions to nodeids. Differential Revision: https://phab.mercurial-scm.org/D3942

rebase: avoid converting from nodes to revnums twice In the case where the node has successors, but none of them is an ancestor of the destination, we would iterate over the successor nodes twice, check if they're in the repo and convert them to revnums. I doubt it's a measureable cost, but it gets simpler this way too. Differential Revision: https://phab.mercurial-scm.org/D3941

rebase: reduce scope of a variable Differential Revision: https://phab.mercurial-scm.org/D3940

context: rename descendant() to isancestorof() This makes the direction much clearer, IMO. Differential Revision: https://phab.mercurial-scm.org/D3936

copies: delete now-unnecessary check for "a == b" before "a.descendant(b)" Unnecessary since 879cbdde63df (revlog: do inclusive descendant testing (API), 2018-06-21). Differential Revision: https://phab.mercurial-scm.org/D3935

revlog: delete isdescendantrev() in favor of isancestorrev() As agreed on by Boris, Yuya, and me on D3929. Differential Revision: https://phab.mercurial-scm.org/D3934

rebase: add --confirm option This feature adds a functionality in rebase to confirm before applying changes. When there is no conflict and user confirm to apply actions, we just finish the unfinished rebase. But when there is a conflict and user confirm to apply actions then we can't just finish rebasing using rbsrt._finishrebase() because in-memory merge doesn't support conflicts, so we have to abort and run on-disk merge in this case. And if user doesn't confirm to apply actions then simply abort the rebase. Differential Revision: https://phab.mercurial-scm.org/D3870

revlog: introduce a isancestorrev() and use it in rebase Differential Revision: https://phab.mercurial-scm.org/D3931

revlog: make isdescendantrev(a, b) check if a < b This check was taken from rebase.py. It seems to make sense to move it here, but I haven't done any measurements. Differential Revision: https://phab.mercurial-scm.org/D3930

revlog: replace descendant(b, a) by isdescendantrev(a, b) (API) The "is" is to match "isancestor" and to make it clear that it doesn't return a descendant. The "rev" is to make it clear that it's not about nodeids (unlike e.g. isancestor()). The argument order change is just seems more natural (and makes isancestor() less confusing). Differential Revision: https://phab.mercurial-scm.org/D3929

revlog: move comment about commonancestorsheads where it's used Differential Revision: https://phab.mercurial-scm.org/D3928

removeemptydirs: add test for `hg split` inside a disappearing directory Differential Revision: https://phab.mercurial-scm.org/D3927

fncache: avoid loading the filename cache when not actually modifying it With time, fncache can become very large. The mozilla-central repo for example, has a 31M and growing fncache file. Loading this file takes time (280ms for the mozilla-central repository). In many scenarios, we don't need to load fncache at all. For example, when committing changes to existing files, or pushing such commits to another clone. This patch detects when a name is added via store.vfs(), and only loads the cache if a) the data metadata file doesn't already exist, or b) when opening for appending, the data or metadata file exists but has size (a transaction rollback leaves behind such files). Benchmarks (run on Macos 10.13 on a 2017-model Macbook Pro with Core i7 2.9GHz and flash drive), each test without and with patch run 5 times: * committing to an existing file, against the mozilla-central repository. Baseline real time average 2.3736, with patch 1.9884. * unbundling a large changeset consisting *only* of existing-file modifications (159 revisions, 1050 modifications, mozilla-central 4a250a0e4f29:beea9ac7d823), into a clone limited to the ancestor revision of that revset). Baseline real time average 1.5048, with patch 1.3108.

tests: add diff color trailing whitespace test

scmutil: fix shortesthexnodeidprefix on Python 3 for 0-prefixed nodes This fixes test-bookmarks.t on Python 3 (which had regressed.) Differential Revision: https://phab.mercurial-scm.org/D3926