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;;; git-email.el --- Work with git and email -*- lexical-binding: t; -*-
;; Copyright (C) 2021 yoctocell
;; Author: yoctocell <public@yoctocell.xyz>
;; URL: https://git.sr.ht/~yoctocell/git-email
;; Version: 0.1.0
;; Package-Requires: ((emacs "25.1"))
;; Keywords: git email
;; License: GNU General Public License >= 3
;; This program is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with this program. If not, see <https://www.gnu.org/licenses/>.
;;; Commentary:
;; This package integrates with git and email and offers two main functions
;; - `git-email-send-email' and `git-email-apply-patch'.
;;
;; `git-email-send-email' sends an email based on a patch file generated by
;; 'git format-patch'. It inserts the relevant headers and the diff into the
;; message buffer.
;;
;; `git-email-apply-patch' will apply the patch that you are currently viewing
;; and it will ask to for the project that the patch belongs to.
;;; TODO:
;; * Add proper syntax highlighting to diffs in the message buffer.
;;; Code:
(defgroup git-email nil
"Work with git and email."
:group 'convenience)
(defcustom git-email--compose-message-function 'message-mail
"The function used to compose patch mail."
:group 'git-email
:type 'symbol)
(defun git-email--extract-header (header patch-file)
"Extract HEADER from PATCH-FILE.
If the header is not found, return an empty string."
(with-temp-buffer
(insert-file-contents patch-file)
(goto-char (point-min))
(buffer-substring-no-properties
(if (re-search-forward (format " *%s: +" header) nil t)
(point)
(point-at-eol))
(point-at-eol))))
(defun git-email--extract-diff (patch-file)
"Extract the diff from PATCH-FILE."
(with-temp-buffer
(insert-file-contents patch-file)
(goto-char (point-min))
(buffer-substring-no-properties
(- (re-search-forward "\n\n") 1)
(point-max))))
(defun git-email-send-email (patch-file)
"Given a PATCH-FILE, send an email.
Extracts the relevant headers and the diff from the PATCH-FILE and inserts
them into the message buffer."
(interactive)
(let* ((default-directory (cdr (project-current)))
(subject (git-email--extract-header "subject" patch-file))
(from (git-email--extract-header "from" patch-file))
(sendemail-to
(shell-command-to-string "git config --list | grep sendemail.to"))
(to (if (string-equal sendemail-to "")
"to"
(substring sendemail-to 13 -1))) ; Remove newline
(in-reply-to (git-email--extract-header "in-reply-to" patch-file))
(msg-id (git-email--extract-header "message-id" patch-file))
(diff (git-email--extract-diff patch-file)))
(funcall git-email--compose-message-function to subject
`(("in-reply-to" ,in-reply-to)
("message-id" ,msg-id)
("from" ,from)))
;; (let ((body (or (re-search-forward "<#part .*>")
;; (re-search-forward "--text follows this line--"))))
(goto-char (point-max))
(insert diff)))
(provide 'git-email)
;;; git-email.el ends here
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