mpxv temporal colouring scale

[jameshadfield]

Note: this requires forthcoming PRs in augur and auspice, and I'll notify here when released etc. Because of this i'll keep this as a draft PR.

The end result is

[jameshadfield]

Augur PR: nextstrain/augur#969 (Update: done, released & image updated)
Auspice PR: nextstrain/auspice#1523 (Update: done, released & nextstrain.org updated)

[jameshadfield]

Both of the prereq PRs above have been merged. Auspice is released (2.37.3) and the augur change should be released tomorrow 🤞

Update: The augur release will be 16.0, and this will require a few more things too:

1. Wait until the nextstrain image has been updated (should be automatic)
2. Add a check (in the Snakefile?) to ensure the user has >16.0

[victorlin]

Wait until the nextstrain image has been updated (should be automatic)

This has been done: nextstrain/base:build-20220616T211939Z

[jameshadfield]

Added a commit to ensure we're running augur v16, which is causing CI to fail as nextstrain/base:branch-nextalign-v2 has yet to be updated...

[corneliusroemer]

I've restarted failing CI to see if the new image has propagated by now @jameshadfield

[corneliusroemer]

After merging recent changes this now passes tests and should be mergable - but I leave the button pushing to you @jameshadfield :)

[corneliusroemer]

I'll merge because it's better than what we use currently. But is it on purpose that there's no cake for the map?

[jameshadfield]

but I leave the button pushing to you

Thanks for merging this -- it's the nice thing about working across different time zones 😂

But is it on purpose that there's no cake for the map?

I've not heard them called 🍰 but I like it. Continuous scales (and temporal is a continuous scale with small tweaks) get colour blending (e.g. https://next.nextstrain.org/zika/?c=num_date&d=map&p=full), however it's been a to-do to explore discretising these (e.g. via the binning in the legend) to produce a 🍰 . It would certainly make the map code simpler!