diff options
Diffstat (limited to 'lisp/epg-config.el')
| -rw-r--r-- | lisp/epg-config.el | 90 |
1 files changed, 53 insertions, 37 deletions
diff --git a/lisp/epg-config.el b/lisp/epg-config.el index 3b2d6bbbb02..ea1ae6c439f 100644 --- a/lisp/epg-config.el +++ b/lisp/epg-config.el @@ -44,13 +44,17 @@ (defcustom epg-gpg-program (if (executable-find "gpg2") "gpg2" "gpg") - "The `gpg' executable." + "The `gpg' executable. +Setting this variable directly does not take effect; +instead use \\[customize] (see the info node `Easy Customization')." :version "25.1" :group 'epg :type 'string) (defcustom epg-gpgsm-program "gpgsm" - "The `gpgsm' executable." + "The `gpgsm' executable. +Setting this variable directly does not take effect; +instead use \\[customize] (see the info node `Easy Customization')." :group 'epg :type 'string) @@ -81,57 +85,69 @@ Note that the buffer name starts with a space." (defconst epg-config--program-alist '((OpenPGP epg-gpg-program - epg-config--make-gpg-configuration ("gpg2" . "2.1.6") ("gpg" . "1.4.3")) (CMS epg-gpgsm-program - epg-config--make-gpgsm-configuration ("gpgsm" . "2.0.4"))) "Alist used to obtain the usable configuration of executables. The first element of each entry is protocol symbol, which is either `OpenPGP' or `CMS'. The second element is a symbol where -the executable name is remembered. The third element is a -function which constructs a configuration object (actually a -plist). The rest of the entry is an alist mapping executable -names to the minimum required version suitable for the use with -Emacs.") +the executable name is remembered. The rest of the entry is an +alist mapping executable names to the minimum required version +suitable for the use with Emacs.") + +(defconst epg-config--configuration-constructor-alist + '((OpenPGP . epg-config--make-gpg-configuration) + (CMS . epg-config--make-gpgsm-configuration)) + "Alist used to obtain the usable configuration of executables. +The first element of each entry is protocol symbol, which is +either `OpenPGP' or `CMS'. The second element is a function +which constructs a configuration object (actually a plist).") (defvar epg--configurations nil) ;;;###autoload -(defun epg-find-configuration (protocol &optional force) +(defun epg-find-configuration (protocol &optional no-cache program-alist) "Find or create a usable configuration to handle PROTOCOL. This function first looks at the existing configuration found by -the previous invocation of this function, unless FORCE is non-nil. - -Then it walks through `epg-config--program-alist'. If -`epg-gpg-program' or `epg-gpgsm-program' is already set with -custom, use it. Otherwise, it tries the programs listed in the -entry until the version requirement is met." - (let ((entry (assq protocol epg-config--program-alist))) +the previous invocation of this function, unless NO-CACHE is non-nil. + +Then it walks through PROGRAM-ALIST or +`epg-config--program-alist'. If `epg-gpg-program' or +`epg-gpgsm-program' is already set with custom, use it. +Otherwise, it tries the programs listed in the entry until the +version requirement is met." + (unless program-alist + (setq program-alist epg-config--program-alist)) + (let ((entry (assq protocol program-alist))) (unless entry (error "Unknown protocol %S" protocol)) - (cl-destructuring-bind (symbol constructor . alist) + (cl-destructuring-bind (symbol . alist) (cdr entry) - (or (and (not force) (alist-get protocol epg--configurations)) - ;; If the executable value is already set with M-x - ;; customize, use it without checking. - (if (get symbol 'saved-value) - (let ((configuration (funcall constructor (symbol-value symbol)))) - (push (cons protocol configuration) epg--configurations) - configuration) - (catch 'found - (dolist (program-version alist) - (let ((executable (executable-find (car program-version)))) - (when executable - (let ((configuration - (funcall constructor executable))) - (when (ignore-errors - (epg-check-configuration configuration - (cdr program-version)) - t) - (push (cons protocol configuration) epg--configurations) - (throw 'found configuration)))))))))))) + (let ((constructor + (alist-get protocol epg-config--configuration-constructor-alist))) + (or (and (not no-cache) (alist-get protocol epg--configurations)) + ;; If the executable value is already set with M-x + ;; customize, use it without checking. + (if (and symbol (get symbol 'saved-value)) + (let ((configuration + (funcall constructor (symbol-value symbol)))) + (push (cons protocol configuration) epg--configurations) + configuration) + (catch 'found + (dolist (program-version alist) + (let ((executable (executable-find (car program-version)))) + (when executable + (let ((configuration + (funcall constructor executable))) + (when (ignore-errors + (epg-check-configuration configuration + (cdr program-version)) + t) + (unless no-cache + (push (cons protocol configuration) + epg--configurations)) + (throw 'found configuration))))))))))))) ;; Create an `epg-configuration' object for `gpg', using PROGRAM. (defun epg-config--make-gpg-configuration (program) |