tests: test output of {predecessors}, {successorssets} for non-obsolete csets Differential Revision: https://phab.mercurial-scm.org/D9157

branching: merge with stable

copies: move `merged` testing sooner previously `is_merged` was an expensive callback. Now that all this data is pre-computed, this is is a simple membership testing. So it is probably cheaper than the membership testing. Differential Revision: https://phab.mercurial-scm.org/D9141

copies: return None instead of ChangingFiles when relevant If they are not relevant data, they are no need to fetch them. Differential Revision: https://phab.mercurial-scm.org/D9140

copies: add a HASCOPIESINFO flag to highlight rev with useful data If some files changes that may impact copy tracing are detected, we set this flag. This helps the copy tracing algorithm to skip fetching possibly expensive data when unnecessary. Differential Revision: https://phab.mercurial-scm.org/D9139

salvaged: properly deal with salvaged file during copy tracing When salvaged files are encountered, the removal have been reverted and we should keep the rename information from the other side. The conditional was starting to be quite hairy, so we spell it out in multiple elif case for readability. This fixes the associated test cases introduced a while back. The changeset centric copy tracing is now (known) bug free. Differential Revision: https://phab.mercurial-scm.org/D9130

salvaged: persist the salvaged set on disk With the new side data storage, this is trivial. Differential Revision: https://phab.mercurial-scm.org/D9129

changing-files: add clean computation of changed file for merges This is "a tad more complicated" than the previous cases. See inline documentation for details (have fun). Differential Revision: https://phab.mercurial-scm.org/D9128

changing-files: add clean computation of changed files for linear changesets The `files` field is not reliable, so we need to compute things from scratch. We deal with the second simplest case, linear changesets. We diff the current manifest with the parent manifest. This reveal the file added, changed and removed. Differential Revision: https://phab.mercurial-scm.org/D9127

changing-files: add clean computation of changed files for roots The `files` field is not reliable, so we need to compute things from scratch. We start with the simplest case root changesets. In the beginning they was nothing, then user said "let there be files" and there were added files. Differential Revision: https://phab.mercurial-scm.org/D9126

changing-files: add a debug command display changed files The binary output from sidedata is useful to verify the underlying data do not get corrupted. However having a human readable version is much simpler for debuging the changed files data itself. So we add a debug command to dump this information and we use it in the tests. Differential Revision: https://phab.mercurial-scm.org/D9125

side-data: add a test to check sidedata upgrade We want to make sure that sidedata computed at commit time and during upgrade are the same. To do so, we upgrade the repository in `test-copies-chain-merge.t` since the file is checking all the special case that we need to catch. The sidedata content in both case should be the same. Differential Revision: https://phab.mercurial-scm.org/D9124

changing-files: split the changing files computation from encoding The side data encoding is already in its own function, now we move the changing files computation in it own function, it will receive more updates in the coming changesets. Differential Revision: https://phab.mercurial-scm.org/D9123

salvaged: record salvaged in ChangingFiles at commit time The new code is a simple but effective way to detect this information. We might be able to move it inside the various conditionnal above, but I want to focus on simplicity until we have a full working stack. It is worth noting that if we record the information in the ChangingFiles object, it is not persisted yet. This will comes with later changesets. Differential Revision: https://phab.mercurial-scm.org/D9120

salvaged: track removal-candidates in more cases If we want to use this information for copy tracing, then we need to be able to record it. First we unlock the recording of deletion candidates, and we will actually record the data in the next changeset. Differential Revision: https://phab.mercurial-scm.org/D9119

salvaged: explicitly skip salvaged file while encoding This is a temporary measure to avoid diverging test cases (between commit time sidedata and upgraded sidedata) while we implement salvaged tracking in the different cases. This will be dropped soon. Differential Revision: https://phab.mercurial-scm.org/D9122

changing-files: add a "salvaged" set to track file that were not removed We need this set for the copy tracing algorithm. See documentation for details about this set. Differential Revision: https://phab.mercurial-scm.org/D9118

tests: back out accidentally queued changeset 0627cd03b1e9 I accidentally queued other people's patches on top of my own and pushed mine along with theirs.

tests: fix test-check-module-imports.t broken by D9150 Differential Revision: https://phab.mercurial-scm.org/D9177

tests: make test-convert-git.t work across changed default branch name Recent git versions default to "main" instead of "master", which breaks our test. Differential Revision: https://phab.mercurial-scm.org/D9174

tests: update test-copies-chain-merge.t to not use empty files Merging empty files is not very interesting or realistic.

tests: only diff the `Cargo.lock` in `test-check-cargo-lock.t` While not perfect (you could be running tests while developing with a justified modification to `Cargo.lock`), that use-case is small enough that I don't think it's really going to be an issue. This stops the test from failing for unrelated changes when running it locally. Differential Revision: https://phab.mercurial-scm.org/D9170

tests: update/remove outdated comments in test-copies-chain-merge.t 1b8fd4af3318 fixed the test case but missed updating the comments mentioning the bug. Thanks for @martinvonz who spotted these outdated comments. Differential Revision: https://phab.mercurial-scm.org/D9168

churn: leverage logcmdutil to filter revisions by --date

cmdutil: remove remainder of old walkchangerevs() implementation

cmdutil: rewrite walkchangerevs() by using logcmdutil functions cmdutil.walkchangerevs() now takes (revs, makefilematcher) in place of (match, opts), and only provides the "windowing" functionality. Unused classes and functions will be removed by the next patch. "hg grep --follow" (--all-files) is still broken since there is no logic to follow copies while traversing changelog, but at least, it does follow the DAG.

grep: filter target files by matcher Prepares for the migration to logcmdutil's logic, where cmdutil.walkchangerevs() won't always build an exact set of paths to be scanned.

cmdutil: make walkchangerevs() call prepare with matcher instead of filenames Prepares for migrating walkchangerevs() to logcmdutil's logic, which provides matcher-based interface.

grep: add option for logcmdutil.makewalker() to not filter revs by file pats This is needed to implement "grep --all-files".

rust-parsers: use in-place mutation instead of allocating a new `Vec` This is not done for the `dirstate-tree` feature, since it lacks `iter_mut`. Differential Revision: https://phab.mercurial-scm.org/D9136