Add automatic incremental compilation

[quintesse]

Between the source map and some smartness, we should be able to determine that when we want to compile a module with a special --incremental flag we:

• only need to compile source files which are newer than their target classes
• and their transitive dependencies
• and automatically detect the list of those files

That could be seen as the job of the build tool, but I don't think anyone can do this sort of detection better than the compiler itself.

[FroMage]

I've made this M2 as it will require some work in both the type checker and the compiler.

[FroMage]

Slips to M3.

[FroMage]

M5.

[FroMage]

Moving to 1.1

[FroMage]

Moving to 1.2

[quintesse]

I remember I added this issue because of something @gavinking said... but I must say I don't understand my own description anymore. Anyone knows what this is actually about?

[FroMage]

I guess automatically add files that we need to compile/recompile?

[quintesse]

But add them where? If this is like the other issue about --incremental then this could be closed. Or if nobody remembers what this is about ;)

[FroMage]

This one looks like we opened it first, man ;) And yes I'm pretty sure it's about adding required/outdated files automatically. Incremental we already do with the model loader. This is automatic source-file-list computation.

[quintesse]

I mean #1487 which you opened. Which seems to have a better description and is more inclusive.

[FroMage]

I've no idea what you mean ;)

[quintesse]

^^