emacs: Add notmuch-crypto-gpg-program and use it

Allow the user to specify the gpg program to use when retrieving keys,
etc., defaulting to the value of `epg-gpg-program'.

diff --git a/emacs/notmuch-crypto.el b/emacs/notmuch-crypto.el
index 457c821c3d1ff9635b27f25d7f118c8120501445..9b615a0f20e515dd5f2a0532f282dd2e0a868d4d 100644 (file)
--- a/emacs/notmuch-crypto.el
+++ b/emacs/notmuch-crypto.el
@@ -48,6 +48,11 @@ mode."
   :type 'boolean
   :group 'notmuch-crypto)
 
+(defcustom notmuch-crypto-gpg-program epg-gpg-program
+  "The gpg executable."
+  :type 'string
+  :group 'notmuch-crypto)
+
 (defface notmuch-crypto-part-header
   '((((class color)
       (background dark))
@@ -151,7 +156,7 @@ by user FROM."
     (with-selected-window window
       (with-current-buffer buffer
        (goto-char (point-max))
-       (call-process epg-gpg-program nil t t "--batch" "--no-tty" "--list-keys" fingerprint))
+       (call-process notmuch-crypto-gpg-program nil t t "--batch" "--no-tty" "--list-keys" fingerprint))
       (recenter -1))))
 
 (declare-function notmuch-show-refresh-view "notmuch-show" (&optional reset-state))
@@ -208,7 +213,7 @@ corresponding key when the status button is pressed."
           button (format "Retrieving key %s asynchronously..." keyid))
          (let ((p (make-process :name "notmuch GPG key retrieval"
                                 :buffer buffer
-                                :command (list epg-gpg-program "--recv-keys" keyid)
+                                :command (list notmuch-crypto-gpg-program "--recv-keys" keyid)
                                 :connection-type 'pipe
                                 :sentinel #'notmuch-crypto--async-key-sentinel
                                 ;; Create the process stopped so that
@@ -220,13 +225,14 @@ corresponding key when the status button is pressed."
            (process-put p :notmuch-show-point (point))
            (message "Getting the GPG key %s asynchronously..." keyid)
            (continue-process p)))
+
       (let ((window (display-buffer buffer)))
        (with-selected-window window
          (with-current-buffer buffer
            (goto-char (point-max))
-           (call-process epg-gpg-program nil t t "--recv-keys" keyid)
+           (call-process notmuch-crypto-gpg-program nil t t "--recv-keys" keyid)
            (insert "\n")
-           (call-process epg-gpg-program nil t t "--list-keys" keyid))
+           (call-process notmuch-crypto-gpg-program nil t t "--list-keys" keyid))
          (recenter -1))
        (notmuch-show-refresh-view)))))