[Discussion] Make arguments redo

[jackhumbert]

We're currently considering revamping the make system a bit to support organising keyboards/projects into folders, and letting those folders share code with each other. This will replace what's known as "subprojects" right now, and would support up to 5 folders in depth. One example might be:

/keyboards/olkb/planck/rev4/

The default keymap for which could be compiled with:

make olkb/planck/rev4:default

Changing the separator to : allows for more clarity, and more easily supports - in folder/keymap names. Other targets would be separated with : as well, like make olkb/planck/rev4:default:dfu.

You would be able to define a default at any point in the folder system, so olkb/rules.mk could have:

DEFAULT_FOLDER = olkb/planck/rev4

so that whenever make olkb:default is run, it defaults to the olkb/planck/rev4 target - this would be required (this is up for debate, but there are some unwanted consequences with building all available folders).

The *.c files would be included automatically if they exist. For example:

• /keyboards/olkb/olkb.c
• /keyboards/olkb/planck/planck.c
• /keyboards/olkb/planck/rev4/rev4.c

would all get included when compiling the target olkb/planck/rev4, and each folder would get added to the path.

Filenames would convert / to _ in the target.

Keymaps could be stored at any point in the folder system, allowing for keyboard-specific keymaps, revision-specific keymaps, etc.

I've been messing around with this on make_args_redo but we're welcoming comments on the concept/implementation!

[jetpacktuxedo]

It might be a struggle for people used to the current system, but it should make it easier for new people and for future changes.

[jackhumbert]

I think we'll plan on implementing this on 2017-10-01 - if anyone has any ideas or concerns with the concept or implementation, please comment before then!

[Sebb767]

Looks good. I like that subprojects are better split from other parameters such as keymap and programmer than before. +1 from me :)