commitctx: document the None return for "touched" value

tests: add tests trying to use dir as style, as %include, and as __base__ Differential Revision: https://phab.mercurial-scm.org/D8800

tests: fix mistaken copy&paste from commit 4489e9a22763 Differential Revision: https://phab.mercurial-scm.org/D8802

manifest: kill one more instance of the old merge hash hack Differential Revision: https://phab.mercurial-scm.org/D8766

dirstate: isolate node len dependency for the pure version When switching to a 256bit hash function, this still needs adjustment, but concentrates the change in one place. Differential Revision: https://phab.mercurial-scm.org/D8815

fix: update documentation to reflect preference for --source over --rev I should have updated the documentation in 5205b46bd887 (fix: add a -s option to format a revision and its descendants, 2020-03-13) and/or a6ef1e8e2f6d (fix: mark -r as advanced, 2020-03-13)... Differential Revision: https://phab.mercurial-scm.org/D8808

tests: make check-py3-compat.py actually load the specified files correctly For most uses, this change is essentially a no-op, as this script is generally only run by test-check-py3-compat.t, which will already put `$TESTDIR/..` in `$PYTHONPATH`. When running outside of tests, however, `$PYTHONPATH` is likely not set, causing check-py3-compat.py to parse the file from the repo, but then import the installed version, and raise any errors about the installed version, not the one currently in the repo. Additionally, this helps users (like me) who have a strange set up where their home directory (and thus their hg repos) happen to be in a subdirectory of sys.prefix (which is /usr on my system). Since the '.' entry added to sys.path takes precedence over the absolute path of `$TESTDIR/..` in `$PYTHONPATH`, the path to the modules that it imports (and that show up in any stack trace) are *relative*, meaning that we don't detect them as starting with `sys.prefix`. Sample non-test invocation, and the difference this change makes (the path for 'error at <path>:<line>' is correct now):: Before: ``` $ python3 contrib/check-py3-compat.py mercurial/win*.py mercurial/win32.py: error importing: <ValueError> _type_ 'v' not supported (error at check-py3-compat.py:65) mercurial/windows.py: error importing: <ModuleNotFoundError> No module named 'msvcrt' (error at check-py3-compat.py:65) ``` After: ``` $ python3 contrib/check-py3-compat.py mercurial/win*.py mercurial/win32.py: error importing: <ValueError> _type_ 'v' not supported (error at win32.py:11) mercurial/windows.py: error importing: <ModuleNotFoundError> No module named 'msvcrt' (error at windows.py:12) ``` Differential Revision: https://phab.mercurial-scm.org/D8814

tests: virtualenv is only used on py2, rename and conditionalize If I have I have the Debian `python3-virtualenv` package installed on my machine, the import succeeds but then I receive an AttributeError because the package is essentially completely different between py2 and py3, and test-hghave fails. Differential Revision: https://phab.mercurial-scm.org/D8812

morestatus: mention --stop even if not using --verbose Differential Revision: https://phab.mercurial-scm.org/D8811

templater: handle None returned from templatedir() My recent 91aa9bba3dc9 (templater: make templatepaths() return a single path, or None, 2020-07-21) didn't account for the fact that `templatedir()` returns `None` in frozen binaries. That is ironic, since the reason I'm working on this is to add support for built-in mapfiles in frozen binaries. This patch updates the callers to handle the `None` case. It's somewhat ugly, but I will have to revisit this soon anyway, since my goal is to make all callers handle that case by trying to read the map file using the resources API instead. Differential Revision: https://phab.mercurial-scm.org/D8810