Add clojure-semantic support to clojure layer

[sooheon]

https://github.com/kototama/clojure-semantic

Currently, the repository doesn't have a MELPA listing, so I'm not sure what the correct way to add it would be. Just bundle it in the layer? Anyway, it's useful if you use something like lispy, and its cumbersome to have it sitting somewhere else on your disk and manually load it.

[tuhdo]

A while ago Spacemacs has a plan to use Quelpa to simplify the process of installing packages, so there's no distinction between a package and an extension anymore. You can see the issue here: #5. Probably after this Org conversion is taken care of, we should start migrating to Quelpa.

[syl20bnr]

I have to work on the merge of extensions and packages first. Then we will be able to add solutions like Quelpa. The first step is something I can start to tackle in 0.104.0. For the current release I want to finisher org migration and the update mechanism of Spacemacs. I'm 60% done with the update, we can already update Spacemacs from the mode-line button.

[StreakyCobra]

@sooheon AFAIK you can now install packages from github, as shown here: https://github.com/syl20bnr/spacemacs/blob/develop/doc/LAYERS.org#packagesel

You should be able to include it in the clojure layer ☺️

[sooheon]

Thanks @StreakyCobra. Got it working with the following if anyone else is curious, I'll hold off on a PR until there is more actual demand, due to the hacky nature of the file loading currently.

in layer-packages:

(clojure-semantic :location
                            (recipe
                             :fetcher github
                             :repo "kototama/clojure-semantic"))

in init-clojure-semantic declaration:

(use-package clojure-semantic
    :defer t
    :init
    (with-eval-after-load 'clojure-mode
      (load "~/.emacs.d/elpa/clojure-semantic-20130323.2/clojure.el")))

[TheBB]

Maybe someone can push upstream to turn it into a MELPA package with a suitable name?