url_util: introduce a `try_path` function That function… try a build a path, returning None on failure. This helps us to simplify various part of the existing code. Differential Revision: https://phab.mercurial-scm.org/D10437

narrow: add more status messages when narrowing Each of the steps I added status messages for in this patch frequently take minutes or tens of minutes for our internal users. It would be nice to also have a progress bar but that will have to come later. Differential Revision: https://phab.mercurial-scm.org/D10503

narrow: add progress-reporting when looking for local changes in `hg tracked` Looking for local changes (changes not on the given remote) can take a long time, so we should have progress-reporting for it. Differential Revision: https://phab.mercurial-scm.org/D10501

chg: pass --no-profile to disable profiling when starting hg serve If profiling is enabled via global/user config (as far as I can tell, this doesn't affect use of the --profile flag, but it probably does affect --config profiling.enabled=1), then the profiling data can be *cumulative* for the lifetime of the chg process. This leads to some "interesting" results where hg claims the walltime is something like 200s on a command that took only a second or two to run. Worse, however, is that with at least some profilers (such as the default "stat" profiler), this can cause a large slowdown while generating the profiler output. Differential Revision: https://phab.mercurial-scm.org/D10470

profiling: add --no-profile to disable profiling enabled via config Differential Revision: https://phab.mercurial-scm.org/D10469

tests: fix test-chg to ignore a warning about being unable to set locale This is apparently coming from bash when bash is providing the sh that we're using to execute the .sh file generated by run-tests for this test. Bash on my machine: ``` $ sh --version GNU bash, version 5.1.4(1)-release (x86_64-pc-linux-gnu) Copyright (C) 2020 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software; you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. $ sh sh-5.1$ LC_CTYPE=unsupported_value echo hi sh: warning: setlocale: LC_CTYPE: cannot change locale (unsupported_value): No such file or directory hi ``` Differential Revision: https://phab.mercurial-scm.org/D10468

branch: delete obsolete message about changing branch of obsolete commit We now rely on `rewriteutil.precheck()` to check for divergence, so we don't need the extra check in `cmdutil.changebranch()`. The former check is a little less strict in that it allows you to rewrite a commit without non-obsolete successors. Differential Revision: https://phab.mercurial-scm.org/D10519

rewriteutil: check for divergence This code is adapted from the code in the evolve extension. It seems to be equivalent as far as the evolve extension's test suite can tell (the only impact when making their `precheck()` delegate to our version is that error messages are less detailed). I had to change the error message to work with "change branch of" being inserted as the action. Differential Revision: https://phab.mercurial-scm.org/D10518

rewriteutil: adapt "cannot %s while merging" to work with "change branch of" `rewriteutil.precheck()` creates error messages by inserting a given verb into a sentence. The `hg branch -r` command passes in "change branch of" as the verb. That doesn't work well with "cannot %s while merging" (making it "cannot change branch of while merging"). Let's insert a "changeset" there to make it work better. Building sentences like this seems obviously bad for i18n, but fixing that is out of scope for this series, IMO. Differential Revision: https://phab.mercurial-scm.org/D10530

rewriteutil: point to help about instability when rewriting creates orphan This replicates the message from the evolve extension. Differential Revision: https://phab.mercurial-scm.org/D10517