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+;;; passage.el --- Emacs passage support -*- lexical-binding: t; -*-
+
+;; Copyright (C) 2022-2023 William Carroll <wpcarro@gmail.com>
+
+;; Author: William Carroll <wpcarro@gmail.com>
+;; Version: 1.0.0
+
+;; This file is not part of GNU Emacs.
+
+;; 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 <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;; This package provides functions for working with passage.
+
+;;; Code:
+
+(require 'dash)
+(require 'f)
+(require 's)
+
+(defgroup passage nil
+  "Customization options for `passage'."
+  :prefix "passage-"
+  :group 'vterm)
+
+(defcustom passage-store
+  "~/.passage/store"
+  "Path to the passage store directory."
+  :type 'string
+  :group 'passage)
+
+(defcustom passage-executable
+  (or (executable-find "passage")
+      "/nix/store/jgffkfdiiwiqa4zqpxn3691mx9xc6axa-passage-unstable-2022-05-01/bin/passage")
+  "Path to passage executable."
+  :type 'string
+  :group 'passage)
+
+(defun passage-select ()
+  "Select an entry and copy its password to the kill ring."
+  (interactive)
+  (let ((key (completing-read "Copy password of entry: "
+                              (-map (lambda (x)
+                                      (f-no-ext (f-relative x passage-store)))
+                                    (f-files passage-store nil t)))))
+    (kill-new
+     (s-trim-right
+      (shell-command-to-string
+       (format "%s show %s | head -1" passage-executable key))))
+    (message "[passage.el] Copied \"%s\"!" key)))
+
+(provide 'passage)
+;;; passage.el ends here