* lisp/emacs-lisp/package.el (package-list-unsigned): New var.

(package-desc-status): Obey it.

Fixes: debbugs:17625

lisp/ChangeLog

+2014-06-25  Stefan Monnier  <monnier@iro.umontreal.ca>
+
+	* emacs-lisp/package.el (package-list-unsigned): New var (bug#17625).
+	(package-desc-status): Obey it.
+
 2014-06-25  Stephen Berman  <stephen.berman@gmx.net>
 
 	* calendar/todo-mode.el: Fix two bugs.

lisp/emacs-lisp/package.el

@@ -823,6 +823,8 @@ GnuPG keyring is located under \"gnupg\" in `package-user-dir'."
                                    sig))
                              (epg-context-result-for context 'verify)))))
       (if (null good-signatures)
+          ;; FIXME: Only signal an error if the signature is invalid, not if we
+          ;; simply lack the key needed to check the sig!
           (error "Failed to verify signature %s: %S"
                  sig-file
                  (mapcar #'epg-signature-to-string
@@ -1651,6 +1653,9 @@ package PKG-DESC, add one.  The alist is keyed with PKG-DESC."
 (defvar package-list-unversioned nil
   "If non-nil include packages that don't have a version in `list-package'.")
 
+(defvar package-list-unsigned nil
+  "If non-nil, mention in the list which packages were installed w/o signature.")
+
 (defun package-desc-status (pkg-desc)
   (let* ((name (package-desc-name pkg-desc))
          (dir (package-desc-dir pkg-desc))
@@ -1671,9 +1676,8 @@ package PKG-DESC, add one.  The alist is keyed with PKG-DESC."
      (dir                               ;One of the installed packages.
       (cond
        ((not (file-exists-p (package-desc-dir pkg-desc))) "deleted")
-       ((eq pkg-desc (cadr (assq name package-alist))) (if signed
-							   "installed"
-							 "unsigned"))
+       ((eq pkg-desc (cadr (assq name package-alist)))
+        (if (or (not package-list-unsigned) signed) "installed" "unsigned"))
        (t "obsolete")))
      (t
       (let* ((ins (cadr (assq name package-alist)))
@@ -1683,9 +1687,9 @@ package PKG-DESC, add one.  The alist is keyed with PKG-DESC."
           (if (memq name package-menu--new-package-list)
               "new" "available"))
          ((version-list-< version ins-v) "obsolete")
-         ((version-list-= version ins-v) (if signed
-					     "installed"
-					   "unsigned"))))))))
+         ((version-list-= version ins-v)
+          (if (or (not package-list-unsigned) signed)
+              "installed" "unsigned"))))))))
 
 (defun package-menu--refresh (&optional packages keywords)
   "Re-populate the `tabulated-list-entries'.