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path: root/.config/emacs/modules/bd--gpg.el
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;;; -*- lexical-binding: t; -*-
;;; Commentary:
;;; Code:


(defvar bd/password-store-kill-ring-pointer nil
  "The tail of the kill ring whose car is the password.")
(defvar bd/password-store-time-before-clear 10
  "The time before a killed password is cleared.")

(defun bd/password-store-list ()
  "List password-store entries."
  (mapcar (lambda (file)
            (file-name-sans-extension (file-relative-name file "~/.password-store/")))
	  (directory-files-recursively "~/.password-store" ".*\\.gpg$")))

(defun bd/password-store-clear (id)
  "Clears the most recent password copied to the kill ring, printing ID."
  (when bd/password-store-kill-ring-pointer
    (setcar bd/password-store-kill-ring-pointer nil)
    (kill-new "")
    (setq bd/password-store-kill-ring-pointer nil)
    (message "Cleared password for %s from the kill ring and system clipboard." id)))

(defun bd/read-password (id)
  "Read the password-store entry corresponding to ID."
  (bd/password-store-clear "id")
  (let ((find-file-hook (remq 'recentf-track-opened-file find-file-hook)))
    (find-file (concat "~/.password-store/" id ".gpg"))
    (goto-char 1)
    (kill-new (buffer-substring-no-properties (line-beginning-position) (line-end-position)))
    (setq bd/password-store-kill-ring-pointer kill-ring-yank-pointer)
    (kill-buffer (current-buffer))
    (run-at-time bd/password-store-time-before-clear nil
                 (lambda () (funcall #'bd/password-store-clear id)))
    (message "Copied password for %s to the kill ring and system clipboard. Will clear in %s seconds."
             id bd/password-store-time-before-clear)))

(defun bd/password ()
  "Interactively select a password-store password."
  (interactive)
  (bd/read-password (completing-read "Yank: " (bd/password-store-list))))

(use-package pinentry
  :defer 1
  :config
  (pinentry-start)
  (defun pinentry-toggle ()
    "Stops and starts Pinentry service. Workaround
for a bug I've encountered."
    (interactive)
    (pinentry-stop)
    (pinentry-start))
  (setopt enable-recursive-minibuffers t
          pinentry-popup-prompt-window nil))


(provide 'bd--gpg)
;;; bd--gpg.el ends here