Fix a bug introduced in 1.54.0rc1 which meant that Synapse would refuse to start if pre-release versions of dependencies were installed. (#12177)

* Add failing test to characterise the regression #12176

* Permit pre-release versions of specified packages

* Newsfile (bugfix)

Signed-off-by: Olivier Wilkinson (reivilibre) <oliverw@matrix.org>

It’s just occurred to me that #12088 pulled in the “packaging” package (~=21.3). I pulled in the newest version I had at the time.

I only use it for packaging.requirements.Requirements. Which was added in packaging 16.1: https://github.com/pypa/packaging/releases/tag/16.1

https://pkgs.org/download/python3-packaging suggests that the oldest version we care about is 17.1 in Ubuntu Bionic. So I think with this bound we're hunky dory.

* Fix incorrect argument in test case

* Add copyright header

* Docstring and __all__

* Exclude dev depenencies

* Use changelog from #12088

* Include version in error messages

This will hopefully distinguish between the version of the source code
and the version of the distribution package that is installed.

* Linter script is your friend

As we want to include the previous version in the "No new changes..."
string.

* Don't use `tox` for `check-sampleconfig`
* Don't use `tox` for check-newsfragment

* Pull runtime dep checks into their own module
* Reimplement `check_requirements` using `importlib`

I've tried to make this clearer. We start by working out which of
Synapse's requirements we need to be installed here and now. I was
surprised that there wasn't an easier way to see which packages were
installed by a given extra.

I've pulled out the error messages into functions that deal with "is
this for an extra or not". And I've rearranged the loop over two
different sets of requirements into one loop with a "must be instaled"
flag.

I hope you agree that this is clearer.

* Test cases

Signed-off-by: Sean Quah <seanq@element.io>

Co-authored-by: Patrick Cloke <clokep@users.noreply.github.com>

When we get a partial_state response from send_join, store information in the
database about it:
 * store a record about the room as a whole having partial state, and stash the
   list of member servers too.
 * flag the join event itself as having partial state
 * also, for any new events whose prev-events are partial-stated, note that
   they will *also* be partial-stated.

We don't yet make any attempt to interpret this data, so API calls (and a bunch
of other things) are just going to get incorrect data.

* Fix 'Unhandled error in Deferred'

Fixes a CRITICAL "Unhandled error in Deferred" log message which happened when
a function wrapped with `@cachedList` failed

* Minor optimisation to cachedListDescriptor

we can avoid re-using `missing`, which saves looking up entries in
`deferreds_map`, and means we don't need to copy it.

* Improve type annotation on CachedListDescriptor

* fix incorrect unwrapFirstError import

this was being imported from the wrong place

* Refactor `concurrently_execute` to use `yieldable_gather_results`

* Improve exception handling in `yieldable_gather_results`

Try to avoid swallowing so many stack traces.

* mark unwrapFirstError deprecated

* changelog

* Add type hints to `tests/rest/client`

* update `mypy.ini`

* newsfile

* add `test_register.py`

...and various code supporting it.

The /spaces endpoint was from an old version of MSC2946 and included
both a Client-Server and Server-Server API. Note that the unstable
/hierarchy endpoint (from the final version of MSC2946) is not yet
removed.

Instead of being part of /capabilities, this matches a change to
MSC3440 to properly use these endpoints.

* Fix `PushRuleEvaluator` to work on frozendicts

frozendicts do not (necessarily) inherit from dict, so this needs to handle
them correctly.

* Fix event filtering for frozen events

Looks like this one was introduced by #11194.

Before this fix, a legitimate 404 from a federation endpoint (e.g. due
to an unknown room) would be treated as an unknown endpoint. This
could cause unnecessary federation traffic.

Co-authored-by: Andrew Morgan <1342360+anoadragon453@users.noreply.github.com>

Signed-off-by: Sean Quah <seanq@element.io>

Signed-off-by: Sean Quah <seanq@element.io>