Moving to Doom Emacs!

.emacs.d/modules/lang/swift/config.el

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+;;; lang/swift/config.el -*- lexical-binding: t; -*-
+
+(after! swift-mode
+  (set-repl-handler! 'swift-mode #'run-swift))
+
+
+(use-package! flycheck-swift
+  :when (featurep! :tools flycheck)
+  :unless (featurep! +lsp)
+  :after swift-mode
+  :config (flycheck-swift-setup))
+
+
+(use-package! company-sourcekit
+  :when (featurep! :completion company)
+  :unless (featurep! +lsp)
+  :after swift-mode
+  :config
+  (set-company-backend! 'swift-mode '(company-sourcekit company-yasnippet)))
+
+
+(use-package! lsp-sourcekit
+  :when (featurep! +lsp)
+  :after swift-mode
+  :init (add-hook 'swift-mode-local-vars-hook #'lsp!)
+  :config
+  (unless (getenv "SOURCEKIT_TOOLCHAIN_PATH")
+    (setenv "SOURCEKIT_TOOLCHAIN_PATH" "/Library/Developer/Toolchains/swift-latest.xctoolchain"))
+  (setq lsp-sourcekit-executable
+        (cl-find-if #'executable-find
+                    (list lsp-sourcekit-executable ; 'sourcekit' by default
+                          "sourcekit-lsp"
+                          "/Library/Developer/Toolchains/swift-latest.xctoolchain/usr/bin/sourcekit"
+                          "/Library/Developer/Toolchains/swift-latest.xctoolchain/usr/bin/sourcekit-lsp"))))

.emacs.d/modules/lang/swift/packages.el

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+;; -*- no-byte-compile: t; -*-
+;;; lang/swift/packages.el
+
+(package! swift-mode)
+
+(if (featurep! +lsp)
+    (package! lsp-sourcekit)
+  (when (featurep! :completion company)
+    (package! company-sourcekit))
+  (when (featurep! :tools flycheck)
+    (package! flycheck-swift)))