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+;;; piem-lei.el --- lei integration for piem -*- lexical-binding: t; -*-
+
+;; Copyright (C) 2021 Kyle Meyer <kyle@kyleam.com>
+
+;; Author: Kyle Meyer <kyle@kyleam.com>
+;; Keywords: vc, tools
+;; Package-Requires: ((emacs "26.3"))
+
+;; 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/>.
+
+;;; Code:
+
+(require 'piem)
+
+(defgroup piem-lei nil
+ "lei integration for piem."
+ :group 'piem)
+
+
+;;;; Message display
+
+(defun piem-lei-show (mid)
+ "Show message for MID."
+ (interactive
+ (list (read-string "Message ID: " nil nil (piem-mid))))
+ (with-current-buffer (get-buffer-create "*lei-show*")
+ (let ((inhibit-read-only t))
+ (erase-buffer)
+ (call-process "lei" nil '(t nil) nil
+ "q" "--format=text" (concat "m:" mid))
+ (goto-char (point-min))
+ (when (looking-at-p "# blob:")
+ (delete-region (line-beginning-position)
+ (1+ (line-end-position))))
+ (piem-lei-show-mode))
+ (pop-to-buffer (current-buffer))))
+
+(define-derived-mode piem-lei-show-mode special-mode "lei-show"
+ "Major mode for displaying message via lei."
+ :group 'piem-lei
+ (buffer-disable-undo)
+ (setq truncate-lines t)
+ (setq buffer-read-only t)
+ (setq-local line-move-visual t))
+
+;;; piem-lei.el ends here
+(provide 'piem-lei)