feat: prog-go: Enhance Go configuration with go-ts-mode

Add go-ts-mode configuration using tree-sitter for Go programming.
Introduce `go-bin-path` for managing Go tool binaries and implement
`cj/go-staticcheck` for running static analysis. Update key bindings
to use staticcheck instead of golint.

1 files changed, 39 insertions, 18 deletions

diff --git a/modules/prog-go.el b/modules/prog-go.el
index cf12cb6f..0e56e5d0 100644
--- a/modules/prog-go.el
+++ b/modules/prog-go.el
@@ -2,39 +2,60 @@
 ;; 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
+;; golang preferences following Go community standards
 
 (defun cj/go-setup ()
-  "My default code preferences for Golang."
-  (require 'tree-sitter)
-  (require 'tree-sitter-langs)
-  (require 'tree-sitter-hl)
-  (tree-sitter-hl-mode)
-  (hs-minor-mode)
+  "Default code preferences for Golang following Go conventions."
   (company-mode)
-  (setq-default tab-width 4)            ;; set the tab width to 4 spaces
-  (setq-default standard-indent 4)      ;; indent 4 spaces
-  (setq-default indent-tabs-mode nil)   ;; disable tab characters
+  (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
-(add-hook 'go-mode-hook 'cj/go-setup)
+
+(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 mode configuration
+;; go-ts-mode configuration (treesit-based Go editing)
 
 (use-package go-mode
-  :bind (:map go-mode-map
+  :hook (go-ts-mode . cj/go-setup)
+  :bind (:map go-ts-mode-map
 			  ("<f6>"   . gofmt)
 			  ("C-c 6"  . gofmt)
-			  ("<f4>"   . golint)
-			  ("C-c 4"  . golint))
+			  ("<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")
-  ;; allow adding/removing fmt lines; install with:
-  ;; go install golang.org/x/tools/cmd/goimports@latest
+  (add-to-list 'exec-path go-bin-path)
+  ;; Use goimports for formatting (adds/removes imports automatically)
   (setq gofmt-command "goimports"))
 
 (provide 'prog-go)