shelve: add test for Shelf.changed_files

shelve: add Shelf.changed_files for resolving changed files in a plugin

branching: merge stable into default

relnotes: add final 6.3 relnotes

Added signature for changeset 04f1dba53c96

Added tag 6.3.0 for changeset 04f1dba53c96

rust: create wrapper struct to reduce `regex` contention issues Explanations inline.

tags-fnode-cache: skip building a changectx in getfnode Building a changectx object is costly, doing it just to retrieve the revision number is suboptimal. Directly fetching the revision number from the changelog provide a sizeable speedup to `hg debugupdatecache`. ### data-env-vars.name = mercurial-2018-08-01-zstd-sparse-revlog # benchmark.name = debug-update-cache # benchmark.variants.pre-state = warm before: 0.213229 seconds after: 0.165577 seconds (-22.35%) # data-env-vars.name = mercurial-filtered-2019-11-22-zstd-sparse-revlog before: 1.200383 seconds after: 1.071618 seconds (-10.73%) # data-env-vars.name = mozilla-central-2018-08-01-zstd-sparse-revlog before: 1.465735 seconds after: 0.923128 seconds (-37.02%) # data-env-vars.name = mozilla-try-2019-02-18-zstd-sparse-revlog before: 6.511771 seconds after: 4.507316 seconds (-30.78%) # data-env-vars.name = netbeans-2018-08-01-zstd-sparse-revlog before: 1.023007 seconds after: 0.645026 seconds (-36.95%) # data-env-vars.name = pypy-2018-08-01-zstd-sparse-revlog before: 0.381141 seconds after: 0.268654 seconds (-29.51%)

tags-fnode-cache: do not repeatedly open the filelog in a loop While getting multiple hgtagsfnodecache entries, we were opening (and closing) the `.hgtags` filelog for each iteration. The meant repeatedly reading and parsing the version same information from disk. A quite costly operation. We no longer do this, leading to a sizable improvement in `hg debugupdatecache` run for an already warm repositories. ### data-env-vars.name = mercurial-2018-08-01-zstd-sparse-revlog # benchmark.name = debug-update-cache # benchmark.variants.pre-state = warm before: 1.711778 seconds after: 0.213229 seconds (-87.54%) # data-env-vars.name = pypy-2018-08-01-zstd-sparse-revlog before: 4.010817 seconds after: 0.381141 seconds (-90.50%) # data-env-vars.name = netbeans-2018-08-01-zstd-sparse-revlog before: 13.574141 after: 1.023007 seconds (-92.46%) # data-env-vars.name = mozilla-central-2018-08-01-zstd-sparse-revlog before: 18.884656 after: 1.465735 seconds (-92.24%) # data-env-vars.name = mozilla-try-2019-02-18-zstd-sparse-revlog before: 88.924823 after: 6.511771 seconds (-92.68%)

profile: prevent a crash when line number is unknown For some unknown reason, `self.lineno` can be None. The previous code crashed in such case, we now ignore the case, as we do for other error in this function. We also fallback to using `-1` in the output when this lack of line number makes it to the display code. The reason of unknown line-numbers is… unknown.