Remove workaround introduced in Synapse v1.50.0rc1 for Mjolnir compatibility. Breaks compatibility with Mjolnir v1.3.1 and earlier. (#11700)

The unstable identifiers are still supported if the experimental configuration
flag is enabled. The unstable identifiers will be removed in a future release.

Some stuff that came up while we were talking about #12173.

This is allowed per MSC2675, although the original implementation did
not allow for it and would return an empty chunk / not bundle aggregations.

The main thing to improve is that the various caches get cleared properly
when an event is redacted, and that edits must not leak if the original
event is redacted (as that would presumably leak something similar to
the original event content).

Since the object it returns is a ReplicationCommandHandler.

This is clean-up from adding support to Redis where the command handler
was added as an additional layer of abstraction from the TCP protocol.

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

Add third_party module callbacks to check if a user can delete a room and deactivate a user (#12028)

* Add check_can_deactivate_user

* Add check_can_shutdown_rooms

* Documentation

* callbacks, not functions

* Various suggested tweaks

* Add tests for test_check_can_shutdown_room and test_check_can_deactivate_user

* Update check_can_deactivate_user to not take a Requester

* Fix check_can_shutdown_room docs

* Renegade and use `by_admin` instead of `admin_user_id`

* fix lint

* Update docs/modules/third_party_rules_callbacks.md

Co-authored-by: Brendan Abolivier <babolivier@matrix.org>

* Update docs/modules/third_party_rules_callbacks.md

Co-authored-by: Brendan Abolivier <babolivier@matrix.org>

* Update docs/modules/third_party_rules_callbacks.md

Co-authored-by: Brendan Abolivier <babolivier@matrix.org>

* Update docs/modules/third_party_rules_callbacks.md

Co-authored-by: Brendan Abolivier <babolivier@matrix.org>

Co-authored-by: Brendan Abolivier <babolivier@matrix.org>

* `@cached` can now take an `uncached_args` which is an iterable of names to not use in the cache key.
* Requires `@cached`, @cachedList` and `@lru_cache` to use keyword arguments for clarity.
* Asserts that keyword-only arguments in cached functions are not accepted. (I tested this briefly and I don't believe this works properly.)

This allows for the target process to be down for around a minute
which provides time for restarts during synapse upgrades/config updates.

Closes: #12178

Signed off by Nick Mills-Barrett nick@beeper.com

We don't *have* the state at a backwards-extremity, so this is never going to
do anything useful.

* Rewrites the demo documentation to be clearer, accurate, and moves it to our documentation tree.
* Improvements to the demo scripts:
	* `clean.sh` now runs `stop.sh` first to avoid zombie processes.
	* Uses more modern Synapse configuration (and removes some obsolete configuration).
	* Consistently use the HTTP ports for server name, etc.
	* Remove the `demo/etc` directory and place everything into the `demo/808x` directories.

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

This field is only to be used in the Server-Server API, and not the
Client-Server API, but was being leaked when a federation response
was used in the /hierarchy API.

Some properties were marked as RedisProtocol instead of ConnectionHandler,
which wraps RedisProtocol instance(s).

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>

Fix a bug in background updates wherein background updates are never run using the default batch size (#12157)

The caches for the target of the relation must be cleared
so that the bundled aggregations are re-calculated after
the redaction is processed.

I've factored it out for easier use in other workflows.

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.

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

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

Avoid trying to get the state for outliers, which isn't a sensible thing to do.

We make multiple passes over this, so a regular iterable won't do.

If we locally generate a rejection for an invite received over federation, it
is stored as an outlier (because we probably don't have the state for the
room). However, currently we still generate a state group for it (even though
the state in that state group will be nonsense).

By setting the `outlier` param on `create_event`, we avoid the nonsensical
state.

I've argued in #11537 that poetry and tox don't cooperate well at the
moment. (See also #12119.) Therefore I'm pruning away bits of tox to make the transition to poetry easier. This change removes the commands for coverage.

We don't use coverage in anger at the moment. It shouldn't be too hard to add coverage as a dev-dependency and reintroduce this if we really want it.