merge with stable

rhg: Print "bad match" errors in rhg status Previously these would only be visible if enabled with some RUST_LOG environment variable. Differential Revision: https://phab.mercurial-scm.org/D11908

share: make it possible to control the working copy format variant A share will use the same format as its source for the store, but there are no reason to not lets it control the working copy variant at creation time. So we make it so. Differential Revision: https://phab.mercurial-scm.org/D11892

share: move the requirement initialisation code around We will make this logic more flexible in the next patch. We start by moving it at the end of the function without any other change for clarity. Differential Revision: https://phab.mercurial-scm.org/D11891

test: use `hg debugrequires` instead of `cat` in some tests This give the "same" result, while taking in account that the requirement file might be in different location, like what `share-safe` is doing. Differential Revision: https://phab.mercurial-scm.org/D11895

test: simplify `debugformat` matching in test-phases.t This will make the test less sensible to unrelated format changing. Differential Revision: https://phab.mercurial-scm.org/D11894

test: simplify `debugformat` matching in test-copies-chain-merge This will make the test less sensible to unrelated format changing. Differential Revision: https://phab.mercurial-scm.org/D11893

status: when extracting arguments from `opts`, use the same default values Sometimes other code, such as commit when using `commands.commit.post-status`, calls `commands.status()` without going through the normal dispatch mechanism that would typically fill in the args to be something besides None. As a "defense in depth" mechanism for a bug where Mercurial would crash if both `commands.commit.post-status` and `experimental.directaccess` were enabled, let's sanitize these values to be identical to the values they would have when the user invoked this method from the commandline. Differential Revision: https://phab.mercurial-scm.org/D11884

directaccess: fix uses of commands.status() that don't go through flag parsing When `commands.commit.post-status` is enabled, after commit/amend, commands.status() is called without any revs argument, which means that status gets None instead of an empty list like it would receive if the user had invoked this on the commandline. With the `experimental.directaccess` config enabled, this gets passed to `unhidehashlikerevs`, which didn't previously handle None, but now should. Differential Revision: https://phab.mercurial-scm.org/D11883

test: add test for a former race resulting in bad dirstate In 6.0 this used to result in the size being stored in the dirstate is wrong. This was fixed by other change to the mtime gathering logic. Differential Revision: https://phab.mercurial-scm.org/D11749

rhg: fix a crash on non-generaldelta revlogs Differential Revision: https://phab.mercurial-scm.org/D11882

rhg: centralize index header parsing Centralize index header parsing, parse the generaldelta flag, and leave breadcrumbs to relate the code to python. Differential Revision: https://phab.mercurial-scm.org/D11881