add: Save on send plugin

[nkrkv]

It allows to permanently save uploaded program in flash

[gfwilliams]

Thanks - merging in as it's off by default.

However wrapping all the code in onInit is a hugely bad idea I'm afraid. Sticking the code in a function means that Espruino must buffer the whole thing (modules and all) as one giant string.

It'll use a massive amount of memory (double, at least), and might even cause you some upload problems. It's just going to cause your customers a whole lot of pain.

If you absolutely want to do it, I'd say you should do an acorn parse and pull all the Module.X calls and function declarations outside onInit.

[nkrkv]

Thanks!

Yep, it definitely a hack far from being a solution. I'm thinking what if I'll put the program as is, directly on flash? I.e. not program → interpreter eval → interpreter dump → flash but program → flash → reset.

I want to try this utilizing Flash library perhaps. What do you think will I stumble somewhere?

[gfwilliams]

Ahh - program → interpreter eval → interpreter dump → flash isn't what happens. It's actually:

program → interpreter eval → copy RAM to flash

Probably the best solution for you would be to implement: espruino/Espruino#740

I'll post more info in there in a second