fix: reduce number of tool executions By grouping together (path, ctx) pairs according to the inputs they would provide to fixer tools, we can deduplicate executions of fixer tools to significantly reduce the amount of time spent running slow tools. This change does not handle clean files in the working copy, which could still be deduplicated against the files in the checked out commit. It's a little harder to do that because the filerev is not available in the workingfilectx (and it doesn't exist for added files). Anecdotally, this change makes some real uses cases at Google 10x faster. I think we were originally hesitant to do this because the benefits weren't obvious, and implementing it efficiently is kind of tricky. If we simply memoized the formatter execution function, we would be keeping tons of file content in memory. Also included is a regression test for a corner case that I broke with my first attempt at optimizing this code. Differential Revision: https://phab.mercurial-scm.org/D11280

fix: add test to demonstrate how many times tools are executed The current implementation wastes a lot of effort invoking fixer tools more than once on the same file name+content. It is good to track changes in this behavior. Differential Revision: https://phab.mercurial-scm.org/D11279

rhg: add ui.plain() and check it before showing relative paths in status Adds a very basic replica of `ui.plain()`. Differential Revision: https://phab.mercurial-scm.org/D10912

rhg: add relative paths support in `rhg status` Differential Revision: https://phab.mercurial-scm.org/D11614

rhg: refactor function to relativize paths in utils Commands like `files`, `status` supports printing relative paths. Hence we need to re-use this code in other places too. So let's take this out from `rhg files` into a utility function. Next patch will make `rhg status` use it. Differential Revision: https://phab.mercurial-scm.org/D11613

hg: let extensions call the func without populating opts keys This change is to help extensions by not forcing them to populate with opts[b'bundle'] and opts[b'force'] when calling hg.incoming(...) Differential Revision: https://phab.mercurial-scm.org/D11619

rhg: in rhg cat cli, fix the long name of the --rev flag Also tweak the help for the anonymous argument. Differential Revision: https://phab.mercurial-scm.org/D11617

rhg: fallback if tweakdefaults or statuscopies is enabled with status `rhg status` is experimental right now and does not support all functionalities. While the long term target is to implement them, for now we add a fallback to have all tests pass with `rhg status` enabled. Differential Revision: https://phab.mercurial-scm.org/D10906

largefiles: partially undo 61e526585b20e2ff15f19497d0451d18fea02db8 and child Since the largefiles dirstate is now part of transaction, we get rid of this temporary fix which lived for ~7 years. Differential Revision: https://phab.mercurial-scm.org/D11612

largefiles: add tr backup for largefilesdirstate This will help us in automatically restoring the largefilesdirstate if a transaction is rolled back. Differential Revision: https://phab.mercurial-scm.org/D11611