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feat: better json fontification with json-ts-mode, fix: handles stderr in nix-drv-mode #208

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feat: better json fontification with json-ts-mode, fix: handles stderr in nix-drv-mode #208

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81e735f
feat: better json fontification with json-ts-mode
ed9w2in6 Apr 21, 2025
891d963
fix: handles stderr in nix-drv-mode
ed9w2in6 Apr 21, 2025
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40 changes: 30 additions & 10 deletions nix-drv-mode.el
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Original file line number Diff line number Diff line change
Expand Up @@ -18,17 +18,37 @@
(require 'nix)

;;;###autoload
(define-derived-mode nix-drv-mode js-mode "Nix-Derivation"
(define-derived-mode nix-drv-mode json-ts-mode "Nix-Derivation"
"Pretty print Nix’s .drv files."
(let ((inhibit-read-only t))
(erase-buffer)
(insert (shell-command-to-string
(format "%s show-derivation \"%s\""
nix-executable
(buffer-file-name))))
(set-buffer-modified-p nil)
(read-only-mode 1))

(setq inhibit-read-only t)
(erase-buffer)
(let ((err-buf (generate-new-buffer "*nix-drv-mode*")))
(make-process
:name "nix-drv-mode"
:buffer (current-buffer)
:command (list nix-executable "derivation" "show" (buffer-file-name))
:stderr err-buf
:sentinel (lambda (proc event)
(setq inhibit-read-only nil)
(when (string-match "finished" event)
(let ((buf (process-buffer proc)))
(when (and buf (buffer-live-p buf))
(with-current-buffer buf
(set-buffer-modified-p nil)
(read-only-mode)
)))
(when (and (buffer-live-p err-buf) (> (buffer-size err-buf) 0))
(with-current-buffer err-buf
(read-only-mode))
(display-buffer err-buf))
))
:filter (lambda (proc output)
;; use process buffer for output
(let ((buf (process-buffer proc)))
(when (and buf (buffer-live-p buf))
(with-current-buffer buf
(goto-char (point-max))
(insert output)))))))
(add-hook 'change-major-mode-hook #'nix-drv-mode-dejsonify-buffer nil t))

(defun nix-drv-mode-dejsonify-buffer ()
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2 changes: 1 addition & 1 deletion nix-flake.el
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Original file line number Diff line number Diff line change
Expand Up @@ -571,7 +571,7 @@ See `nix-flake-init-post-action' variable for details."
(nix-flake-init-dispatch))))

;;;###autoload
(add-to-list 'auto-mode-alist '("\\flake.lock\\'" . js-mode))
(add-to-list 'auto-mode-alist '("\\flake.lock\\'" . json-ts-mode))

(provide 'nix-flake)
;;; nix-flake.el ends here