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dotfiles/config/emacs/modules/dev.el
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EmacsLisp

;;; development.el --- Languages, Eglot and code navigation -*- lexical-binding: t; -*-
;;; Commentary:
;; Loaded from init.el. Requires Evil.
;;
;; Languages:
;; Markdown markdown-mode.
;; PHP php-mode, PSR-2 style, 4 spaces.
;; Odin odin-mode from git (needs Emacs 30+ for :vc), Eglot + OLS.
;; Go go-mode, Eglot + gopls; organize imports and format on save.
;;
;; Normal/motion state:
;; gd definitions gD references K eldoc
;; C-t jump back ESC closes any open eldoc window.
;;; Code:
;;;; Markdown
(use-package markdown-mode)
;;;; PHP
(use-package php-mode
:mode "\\.php\\'"
:hook
(php-mode . (lambda ()
(setq-local indent-tabs-mode nil)
(setq-local tab-width 4)
(setq-local c-basic-offset 4)))
:custom
(php-mode-coding-style 'psr2))
;;;; Odin
(use-package odin-mode
:vc (:url "https://github.com/mattt-b/odin-mode"
:rev :newest)
:mode "\\.odin\\'"
:hook (odin-mode . eglot-ensure))
;;;; Go
;; Emacs started from the desktop doesn't inherit fish env.
(dolist (d '("/usr/local/go/bin" "/home/jason/.go/bin"))
(add-to-list 'exec-path d)
(setenv "PATH" (concat d ":" (getenv "PATH"))))
(setenv "GOPATH" "/home/jason/.go")
(setenv "GOCACHE" "/home/jason/.go/cache")
(defun my/go-before-save ()
"Organize imports and format the buffer through Eglot."
(when (eglot-managed-p)
(eglot-code-actions nil nil "source.organizeImports" t)
(eglot-format-buffer)))
(use-package go-mode
:mode "\\.go\\'"
:hook ((go-mode . eglot-ensure)
(go-mode . (lambda ()
(setq-local tab-width 4)
(add-hook 'before-save-hook #'my/go-before-save nil t)))))
;;;; Eglot
(use-package eglot
:ensure nil
:config
(setq eglot-autoshutdown t)
(add-to-list 'eglot-ignored-server-capabilities :signatureHelpProvider)
;; Explicit OLS configuration.
(add-to-list
'eglot-server-programs
'(odin-mode
. ("/home/jason/.local/bin/ols"
:initializationOptions
(:odin_command "/home/jason/.odin/odin"
:enable_document_symbols t
:enable_format t
:collections
[(:name "core"
:path "/home/jason/.odin/core")
(:name "vendor"
:path "/home/jason/.odin/vendor")])))))
;; OLS built-in definitions.
(setenv "OLS_BUILTIN_FOLDER" "/home/jason/ThirdParty/ols/builtin")
;;;; Code navigation
;; Vim-style code navigation.
(evil-define-key '(normal motion) 'global
"gd" #'xref-find-definitions
"gD" #'xref-find-references
"K" #'eldoc
(kbd "C-t") #'xref-go-back)
;; ESC closes any open eldoc window.
(defun my/eldoc-close (&rest _)
"Quit every window showing an *eldoc* buffer."
(dolist (w (window-list))
(when (string-prefix-p "*eldoc" (buffer-name (window-buffer w)))
(quit-window nil w))))
(advice-add 'evil-force-normal-state :after #'my/eldoc-close)
;;; development.el ends here