Add automatic incremental compilation

[CeylonMigrationBot]

[@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.

[Migrated from ceylon/ceylon-compiler#40]

[CeylonMigrationBot]

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

[CeylonMigrationBot]

[@FroMage] Slips to M3.

[CeylonMigrationBot]

[@FroMage] M5.

[CeylonMigrationBot]

[@FroMage] Moving to 1.1

[CeylonMigrationBot]

[@FroMage] Moving to 1.2

[CeylonMigrationBot]

[@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?

[CeylonMigrationBot]

[@FroMage] I guess automatically add files that we need to compile/recompile?

[CeylonMigrationBot]

[@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 ;)

[CeylonMigrationBot]

[@FroMage] This one looks like we opened it first, man ;) And yes I'm pretty sure it's about adding required/outdated files automatically.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.

[CeylonMigrationBot]

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

[CeylonMigrationBot]

[@FroMage] I've no idea what you mean ;)

[CeylonMigrationBot]

[@quintesse] ^^

[gavinking]

@quintesse @FroMage is this issue a zombie? Can we close it?

[quintesse]

No, doesn't seem a zombie. It's just something with a low priority so it keeps getting moved.

[gavinking]

Could you maybe improve the issue description then, so that it makes sense what is different to today?

Sent from my iPhone

On 18 Mar 2016, at 21:20, Tako Schotanus notifications@github.com wrote:

No, doesn't seem a zombie. It's just something with a low priority so it keeps getting moved.

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[quintesse]

Well we don't have automatic incremental compilation right now. You can have it "manually" by specifying explicitly every file that you know has changed. This option would make that automatic by checking things like file dates and such.

[gavinking]

Oh, OK, I see.

[FroMage]

Braaaaiiinnnnsssssss…