67 lines
2.4 KiB
EmacsLisp
67 lines
2.4 KiB
EmacsLisp
;;; nix-util.el --- Utilities for dealing with Nix code. -*- lexical-binding: t; -*-
|
|
;;
|
|
;; Copyright (C) 2019 Google Inc.
|
|
;;
|
|
;; Author: Vincent Ambo <tazjin@google.com>
|
|
;; Version: 1.0
|
|
;; Package-Requires: (json map)
|
|
;;
|
|
;;; Commentary:
|
|
;;
|
|
;; This package adds some functionality that I find useful when
|
|
;; working in Nix buffers.
|
|
|
|
(require 'json)
|
|
(require 'map)
|
|
|
|
(defun nix/prefetch-github (owner repo) ; TODO(tazjin): support different branches
|
|
"Fetch the master branch of a GitHub repository and insert the
|
|
call to `fetchFromGitHub' at point."
|
|
|
|
(interactive "sOwner: \nsRepository: ")
|
|
|
|
(let* (;; Keep these vars around for output insertion
|
|
(point (point))
|
|
(buffer (current-buffer))
|
|
(name (concat "github-fetcher/" owner "/" repo))
|
|
(outbuf (format "*%s*" name))
|
|
(errbuf (get-buffer-create "*github-fetcher/errors*"))
|
|
(cleanup (lambda ()
|
|
(kill-buffer outbuf)
|
|
(kill-buffer errbuf)
|
|
(with-current-buffer buffer
|
|
(read-only-mode -1))))
|
|
(prefetch-handler
|
|
(lambda (_process event)
|
|
(unwind-protect
|
|
(pcase event
|
|
("finished\n"
|
|
(let* ((json-string (with-current-buffer outbuf
|
|
(buffer-string)))
|
|
(result (json-parse-string json-string)))
|
|
(with-current-buffer buffer
|
|
(goto-char point)
|
|
(map-let (("rev" rev) ("sha256" sha256)) result
|
|
(read-only-mode -1)
|
|
(insert (format "fetchFromGitHub {
|
|
owner = \"%s\";
|
|
repo = \"%s\";
|
|
rev = \"%s\";
|
|
sha256 = \"%s\";
|
|
};" owner repo rev sha256))
|
|
(indent-region point (point))))))
|
|
(_ (with-current-buffer errbuf
|
|
(error "Failed to prefetch %s/%s: %s"
|
|
owner repo (buffer-string)))))
|
|
(funcall cleanup)))))
|
|
|
|
;; Fetching happens asynchronously, but we'd like to make sure the
|
|
;; point stays in place while that happens.
|
|
(read-only-mode)
|
|
(make-process :name name
|
|
:buffer outbuf
|
|
:command `("nix-prefetch-github" ,owner ,repo)
|
|
:stderr errbuf
|
|
:sentinel prefetch-handler)))
|
|
|
|
(provide 'nix-util)
|