matthuszagh / layers

Reimplementation of Spacemacs layers functionality using macros

todos

pre and postsetup take list of layers

If a list is given, must match all layers.

display warning message if init loaded without all layers

There’s a particular concern that dependencies between define-layer and use-package might conflict in an impossible way. Reporting unloaded layers is a start. Even better would be to also report unmet dependencies. Maybe also suggest dependency conflicts between this and use-package.

get rid of :conflicts?

Will it be clearer to people not to make this declarative? Instead, only specification is when it’s used?

Consider adding :exclusive

This would trigger an error if any package from the supplied list is loaded. This can be useful when multiple layers are mutually exclusive (think themes).

HOLD beta layers

This is a variable that provides zero functionality but makes it easier to keep track of layers that you’d like to get working.

HOLD automated dummy testing data

ERC?

presetups for package management

scenario 1:

1. bootstrap straight
2. straight-use ‘use package
3. use-package layers
4. declare-dummy-layer straight
5. define-layers with presetup deps on straight

to use the package manager within a define-layers I would need to get layers outside of package management. that’s a bad solution. alternatively, i could allow a function that sets something as a dummy layer. place it within a with-eval-after-load or something similar so that it’s only used if the package management layer loaded.

scenario 2:

1. require use package
2. use package layers
3. layer definitions…

pre/postsetup scheduling

(:layer a conflict1 t (body 1)) (:layer b conflict1 nil (body 2)) (:layer c (body 3))

(conflict1, ‘((t ((body 1)) a name) (nil ((body 2)) b name))) (nil-type, ‘((nil ((body 3)) c name)))

before provide presetup: (provide ‘layers-name-presetup-conflict1) (provide ‘layers-name-presetup-nil-type) —-> i.e. provide all conflicts

before (provide ‘layers-name-presetup-conflict1): (provide ‘layers-name-presetup-conflict1-a) (provide ‘layers-name-presetup-conflict1-b) —-> i.e. provide all conflict layer deps

possible forms

(:layer layers [conflict [priority]] body)

layers : a, (a), (a b …) body : one or more sexps, i.e.: (body) – or – (body1) (body2) …

for layers, check if consp, if not wrap it. then process them all identically as list (can be list of 1 element). wrap all bodies regardless.

evaluation

:presetup should only be evaluated once before the setup stage. Setup, postsetup config and func should be evaluated each time.

doesn’t define presetup setup not already loaded

(if (and (not defines-stage) (not setup-loaded)))

general program flow

first declare layers and base layers

encounter define-layer

ignore any undeclared layers

check that first word is a stage keyword