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;;; prog-go --- Golang Specific Settings and Functionality -*- lexical-binding: t; coding: utf-8; -*-
;; author Craig Jennings <c@cjennings.net>
;;; Commentary:
;; Configuration for Go programming using go-ts-mode (tree-sitter based).
;; Requires go-mode package for gofmt and related commands.
;;
;; Tools installation:
;; go install golang.org/x/tools/cmd/goimports@latest
;; go install honnef.co/go/tools/cmd/staticcheck@latest
;;; Code:
(defvar go-bin-path (expand-file-name "~/go/bin")
"Path to Go binaries directory.
This is where tools like goimports and staticcheck are installed.")
(defvar go-ts-mode-map)
(defvar go-mod-ts-mode-map)
;; ---------------------------------- Go Setup ---------------------------------
;; golang preferences following Go community standards
(defun cj/go-setup ()
"Default code preferences for Golang following Go conventions."
(company-mode)
(setq-local tab-width 4) ;; Go standard tab width
(setq-local standard-indent 4) ;; indent 4 spaces per level
(setq-local indent-tabs-mode t) ;; use real tabs (Go convention)
(electric-pair-mode t)) ;; match delimiters automatically
(defun cj/go-staticcheck ()
"Run staticcheck on the current Go package."
(interactive)
(let* ((staticcheck-bin (expand-file-name "staticcheck" go-bin-path))
(default-directory (if buffer-file-name
(file-name-directory buffer-file-name)
default-directory)))
(if (file-executable-p staticcheck-bin)
(compile (format "%s ./..." staticcheck-bin))
(message "staticcheck not found at %s. Install with: go install honnef.co/go/tools/cmd/staticcheck@latest"
staticcheck-bin))))
;; ---------------------------------- Go Mode ----------------------------------
;; go-ts-mode configuration (treesit-based Go editing)
(use-package go-mode
:hook (go-ts-mode . cj/go-setup)
:bind (:map go-ts-mode-map
("<f6>" . gofmt)
("C-c 6" . gofmt)
("<f4>" . cj/go-staticcheck)
("C-c 4" . cj/go-staticcheck))
:mode (("\\.go\\'" . go-ts-mode) ;; .go files use go-ts-mode
("go\\.mod\\'" . go-mod-ts-mode)) ;; go.mod uses go-mod-ts-mode
:config
(add-to-list 'exec-path go-bin-path)
;; Use goimports for formatting (adds/removes imports automatically)
(setq gofmt-command "goimports"))
(provide 'prog-go)
;;; prog-go.el ends here
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