As per [MSC1452](https://github.com/matrix-org/matrix-doc/issues/1452)
Fixes https://github.com/matrix-org/matrix-doc/issues/1254
Although MSC1452 focuses on just the warnings part of the server notices, the base for notices has not been established in the spec. This commit adds the needed support to be able to handle notices.
No intentional divergences from the proposal are included in this changeset. There are a few additions which are used in practice although not defined in the proposal, such as who is responsible for aesthetics, sending notices, and other misc rules.
We don'e need `{{server_server_changelog_r0.1.0}}` (for example), so don't go through the hassle of generating it. Instead, we'll generate the changelog for the requested versions of each API and put that in place. In the future, we may wish to consider bringing back more complicated variables when/if we start generating released versions of the spec on the fly rather than manually.
Currently if you generate a changelog for r0.1.1 of an API, you'd get "No significant changes" which is wrong. You should get a real changelog for the version.
This is now handled by generating a "preferred" changelog which acts as the default for version variables in the RST. Using a specific version's changelog is still supported for the rare cases where that is desired.
Versions are actually on a scale of recommendations, and are expected to be created as needed. The scale presented here (develop/beta/default/recommended/mandatory) is a more wordy version of what was previously discussed/intended for room versions - the labels aren't final and may be changed.
The "Room Specification" (or "Room Version Specification") is the specification that defines which room versions do what and are intended to be documents which speak the truth about how rooms operate under the hood.
The approach taken here is a bit different than other specifications. For starters, the specification is versioned in this project instead of relying on the matrix.org repository to track compiled HTML. This is done for a couple reasons, the first being we're still developing the v1 specification while concurrently making a v2 spec and the second being trying to reduce the reliance on matrix.org's repository for specifications.
Because the room spec is built into versions, some changes needed to be made. The `targets.yaml` now has a special syntax for indicating what version something is at, and the changelog generator can handle rendering different versions of the same changelog (as parsed from the RST). Some additional work has been put in to the changelog parsing to allow us to reference the v1 room spec as "v1" without having to sacrifice clarity in the changelog headings.
Finally, this moves the state resolution algorithms into the versioned
spec as a result of MSC1759 (https://github.com/matrix-org/matrix-doc/pull/1759).
Note: this does not introduce the concept of versioned schemas (tabs) that I was previously working with. There's currently no use for them, so they are shelved elsewhere.
Fixes https://github.com/matrix-org/matrix-doc/issues/1499
This is done by using magic variables in the RST. The magic variables are generated based on the substitutions available, making them available for use at build-time.
Magic variables were chosen because it allows people to continue working on the spec and release process without having to worry about removing a chunk of text from the top of the file. Originally, this was attempted by using jinja2 if-statements, however the substitutions are replaced *after* the template is executed, so the condition would never match.
The format of the variable is to make the templating happy. Using colons or percent signs results in the templator thinking something else is going on, and then complaining about format.
Travis Ralston