Implement jinja2.ext.loopcontrols extensions

[ccutrer]

break and continue in for loops.

See https://jinja.palletsprojects.com/en/stable/extensions/#loop-controls

[ccutrer]

@jasmith-hs any chance you could take a look at this? Is there any possibility of getting it in and a new release cut this week? It's blocking a pretty big automation integration between openHAB and Zigbee2MQTT, and openHAB is going into feature freeze next week.

[jasmith-hs]

I will try. This looks good and I have a quick follow-up PR I'm ready to open to make this compatible with eager execution

[ccutrer]

Awesome! Thank you so much

I saw code for eager execution and deferred values, but I don't fully understand what either are. I'll be watching for your follow up PR to increase my understanding.

[jasmith-hs]

Awesome! Thank you so much

I saw code for eager execution and deferred values, but I don't fully understand what either are. I'll be watching for your follow up PR to increase my understanding.

It will take a bit of work to be able to handle them in eager execution, I'm planning to work alongside a new engineer on my team to do that. But getting the incompatibility marked as unsupported is an easy change for me to make: #1222

[jasmith-hs]

@ccutrer 2.7.4 has been released