discovery: replace "heads" by "changesets" in a output note (BC) When using `hg push --rev X`, the subset considered by discovery is only `::X`. In addition, `X` can be any local revisions not just local heads. As a result the message "all local heads known locally" can be misleading. We replace it with the more accurate "all local changesets known remotely". The message appears when in verbose not, so this is stricly speaking a BC breakage. I am not sure this would be a real issue in practice...

py3: drop incorrect fsencode(findexe(...)) in procutil I recently added the bad call, thinking that findexe() was a standard library function returning a string result, but it's actually our own function returning bytes. Thanks to Yuya for noticing. Differential Revision: https://phab.mercurial-scm.org/D6826

flagprocessors: small code update to clarify parameters 'raw' is really a third mode, not a small variant. Differential Revision: https://phab.mercurial-scm.org/D6807

flagprocessors: deprecate _processflags People should use the specialized version instead now. Differential Revision: https://phab.mercurial-scm.org/D6806

simplestorerepo: stop using `_processflags` directly We now use the specialized versions. Differential Revision: https://phab.mercurial-scm.org/D6805

revlog: stop using `_processflags` directly We now use the specialized versions. Differential Revision: https://phab.mercurial-scm.org/D6804

flagprocessors: use _processflagsraw in easy cases When there are no ambiguity regarding the `raw` value, we can simply use the new method. Differential Revision: https://phab.mercurial-scm.org/D6803

flagprocessors: use _processflagsread in simple cases When there are no ambiguity regarding the `raw` value, we can simply use the new method. Differential Revision: https://phab.mercurial-scm.org/D6802

flagprocessors: use _processflagswrite for write operation There are no ambiguity for 'write' operation so it is simple to replace. Differential Revision: https://phab.mercurial-scm.org/D6801

flagprocessors: introduce specialized functions This make the call site clearer and the open the way to more diverse return types. For now, the same old code is still in use under the hood. Differential Revision: https://phab.mercurial-scm.org/D6800

flagutil: use it in simplestorerepo This remove the other code duplication of the `_processflags` code. To be honest, this code looks very dead since it is not run by either developer nor buildbot. However, we update the code to make the task of reviving this less daunting. Differential Revision: https://phab.mercurial-scm.org/D6799

flagutil: make the error class used by the mixin configurable One of the code duplication use a different error class. So let's make it possible to do so. Differential Revision: https://phab.mercurial-scm.org/D6798

flagutil: use the new mixin use in remotefilelog This remove one of the code duplication. Hooray \o/. Differential Revision: https://phab.mercurial-scm.org/D6797

flagutil: introduce a flagprocessorsmixin class To avoid code duplication, we will provide a simple "ready to use" mixin that carry the appropriate logic. First we use it in standard revlog, we'll remove code duplication in later changesets. Differential Revision: https://phab.mercurial-scm.org/D6796

check-code: allow command substitution with $(command) Both `command` and $(command) are specified by POSIX. The latter nests better. I don't see why we shouldn't allow both (or only the latter). Differential Revision: https://phab.mercurial-scm.org/D6789

run-tests: rename `lcmd` variable to `line_cmd` This is clearer and more in line with some other variable names. (This is a gratuitous cleanup that I made while investigating a bug).

run-tests: rename `lout` variable to `out_line` This is clearer and more in line with some other variable names. (This is a gratuitous cleanup that I made while investigating a bug).

run-tests: clarify "l" variable as "out_rawline" More explicit variable name never hurt. (This is a gratuitous cleanup that I made while investigating a bug).

run-tests: use symbolic constant instead of arbitrary number line matching (This is a gratuitous cleanup that I made while investigating a bug).

rustfilepatterns: shorter code for concatenating slices Differential Revision: https://phab.mercurial-scm.org/D6765

match: simplify the regexps created for glob patterns For legibility of the resulting regexes, although it may help with performance as well. Differential Revision: https://phab.mercurial-scm.org/D6764

rustfilepatterns: refactor the pattern of removing a prefix from a &[u8] Differential Revision: https://phab.mercurial-scm.org/D6766

tests: show the pattern generated for a relative glob Differential Revision: https://phab.mercurial-scm.org/D6763

copies: remove existing copy info from the changeset on amend (BC) When amending a changeset with copy information in the changeset and the new changeset doesn't have any copy information (or similar for "filesadded" and "filesremoved"), we shouldn't keep it. A drawback of this is that we now unconditionally remove these four entries from the extras, breaking any extensions that happened to write entries with the same names (which seems very unlikely). I think I'd heard that there was list of blacklisted keys that would be removed from the extras when a commit is rewritten, but I couldn't find that. It would make sense to add the keys mentioned above there instead of the custom filtering I've added in this patch. Differential Revision: https://phab.mercurial-scm.org/D6752

tests: show invalid copies when turning off copies-in-changeset If you turn on copies in changesets and write a commit with a copy, then turn it off and amend the commit while undoing the copy, the invalid copy information will remain. The read path doesn't crash in invalid copy data, but it seems better to not produce the invalid data. Differential Revision: https://phab.mercurial-scm.org/D6751

context: filter out invalid copies from workingctx.p[12]copies() workingctx normally gets its lists of modified, added, removed files etc. based on the dirstate status. Its constructor also accepts a "changes" argument to override the status from the dirstate. This is used for partial commits. If a "changed" argument was passed, we should clearly also filter out copies to those paths, which I had previously missed. This patch adds that filtering and fixes the bugs demonstrated in the previous patch. Differential Revision: https://phab.mercurial-scm.org/D6750

tests: demonstrate crash when committing subset of copies to changeset When writing copy metadata to the changeset and not committing all copies in the dirstate, we get a ProgrammingError. This commit adds two tests showing how to trigger this bug. Differential Revision: https://phab.mercurial-scm.org/D6749

bdiff-torture: fix pyflakes warning reporting undefined name 'inst' Looks like I got a latest version of pyflakes somehow or it's running on py3 and it spotted this. Differential Revision: https://phab.mercurial-scm.org/D6757

split: handle partial commit of renames when doing split or record (issue5723) When using split or record, using either interface (text or curses), selecting portions of the file to be committed/recorded did not work; the entire file was treated as having been selected. This was because the logic for handling partial application of the patches relies on knowing what files are "new with modifications" and it doesn't treat "rename destination" as "new". There was a complicating issue, however. We're relying on the patch header specifying the copy from/to information, which works as long as the 'copy from' file is there. In the case of renames, however, the 'rename from' file is *not* there, so we need to add it back. Differential Revision: https://phab.mercurial-scm.org/D6768

split: handle partial commit of copies when doing split or record When using split or record, using either interface (text or curses), selecting portions of the file to be committed/recorded did not work; the entire file was treated as having been selected. This appears to be because the logic for handling partial application of the patches relies on knowing what files are "new with modifications", and it doesn't treat "copy destination" as "new". Handling renames correctly is more difficult and will be done in a later patch. Differential Revision: https://phab.mercurial-scm.org/D6767