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emacselisp

How to read contents of the file programmatically in Emacs?

I want to read config.json file inside .emacs, how can I do this?

(require 'json)
(setq config (json-read-from-string (read-file "config.json")))
Solution

  • You can simplify your code to:

    (defun my-file-contents (filename)
  "Return the contents of FILENAME."
  (with-temp-buffer
    (insert-file-contents filename)
    (buffer-string)))

    edit: Although in this particular instance, I see that json-read-file is already defined, which cuts out the middle man.

    Emacs 24.5 defines it like so:

    (defun json-read-file (file)
  "Read the first JSON object contained in FILE and return it."
  (with-temp-buffer
    (insert-file-contents file)
    (goto-char (point-min))
    (json-read)))