py3: don't run source transformer on hgext3rd (extensions)
It's unclear why the source transformer runs on hgext3rd. It's been
like that since it was introduced in
1c22400db72d (mercurial:
implement a source transforming module loader on Python 3,
2016-07-04), and that commit didn't say anything about it (but it says
that it doesn't have "support [...] for extensions").
I find that the current handling of hgext3rd just makes it harder to
convert extensions to Python 3. It makes you convert a bunch of
strings passed to getattr() and kwargs[] to r'' that could otherwise
have been left alone. It's also really confusing that the source
transformer runs when you import the extension as "extensions.foo=",
but not as "extension.foo=/some/path".
I suppose there is small number of (very simple) extensions that would
have worked without this patch that would now be broken. It seems okay
to me to break those.
Differential Revision: https://phab.mercurial-scm.org/D6614
== New Features ==
* New config `commands.commit.post-status` shows status after successful
commit.
* `hg root` now has templating support, including support for showing
where a repo share's source is. See `hg help -v root` for details.
* New `--force-close-branch` flag for `hg commit` to forcibly close
branch from a non-head changeset.
== New Experimental Features ==
* New config `experimental.log.topo` makes `hg log -G` use
topological sorting. This is especially useful for aliases since it
lets the alias accept an `-r` option while still using topological
sorting with or without the `-r` (unlike if you use the `sort(...,
topo)` revset).
== Bug Fixes ==
* issue4292: "hg log and {files} {file_adds} {file_mods} {file_dels}
in template show wrong files on merged revision". See details in
"Backwards Compatibility Changes".
== Backwards Compatibility Changes ==
* Removed (experimental) support for log graph lines mixing
parent/grandparent styles. Setting
e.g. `experimental.graphstyle.parent = !` and
`experimental.graphstyle.grandparent = 3.` would use `!` for the
first three lines of the graph and then `.`. This is no longer
supported.
* If `ui.origbackuppath` had been (incorrectly) configured to point
to a file, we will now replace that file by a directory and put
backups in that directory. This is similar to how we would
previously replace files *in* the configured directory by
subdirectories.
* Template keyword `{file_mods}`, `{file_adds}`, and `{file_dels}`
have changed behavior on merge commits. They used to be relative to
the first parent, but they now consider both parents. `{file_adds}`
shows files that exists in the commit but did not exist in either
parent. `{file_dels}` shows files that do not exist in the commit
but existed in either parent. `{file_mods}` show the remaining
files from `{files}` that were not in the other two
sets.
== Internal API Changes ==
* Matchers are no longer iterable. Use `match.files()` instead.
* `match.visitdir()` and `match.visitchildrenset()` now expect the
empty string instead of '.' to indicate the root directory.
* `util.dirs()` and `util.finddirs()` now include an entry for the
root directory (empty string).
* shelve is no longer an extension now. it will be turned on by default.
* New API to manage unfinished operations: Earlier there were distinct APIs
which dealt with unfinished states and separate lists maintaining them
that are `cmdutil.afterresolvestates`, `cmdutil.unfinishedstates` and
`cmdutil.STATES`. Now these have been unified to a single
API which handles the various states and their utilities. This API
has been added to `state.py`. Now instead of adding to these 3 lists
independently a state for a new operation can be registered using
`addunfinished()` in `state` module.
* `cmdutil.checkunfinished()` now includes detection for merge too.
* We used to automatically attempt to make extensions compatible with
Python 3 (by translating their source code while loading it). We no
longer do that.