emacs: avoid unnecessary let-bindings

[notmuch] / emacs / notmuch-address.el

diff --git a/emacs/notmuch-address.el b/emacs/notmuch-address.el
index 71985ed79dfcce86985002abf2c97e7d9ddb0a65..f313c4152c7b58a6754e349170884eb85447a638 100644 (file)
--- a/emacs/notmuch-address.el
+++ b/emacs/notmuch-address.el
@@ -1,4 +1,4 @@
-;;; notmuch-address.el --- address completion with notmuch
+;;; notmuch-address.el --- address completion with notmuch  -*- lexical-binding: t -*-
 ;;
 ;; Copyright © David Edmondson
 ;;
@@ -21,13 +21,17 @@
 
 ;;; Code:
 
+(eval-when-compile (require 'cl-lib))
+
 (require 'message)
 (require 'notmuch-parser)
 (require 'notmuch-lib)
 (require 'notmuch-company)
-;;
+
 (declare-function company-manual-begin "company")
 
+;;; Cache internals
+
 (defvar notmuch-address-last-harvest 0
   "Time of last address harvest.")
 
@@ -47,6 +51,8 @@ If the hash is not present it attempts to load a saved hash."
   (or notmuch-address-full-harvest-finished
       (notmuch-address--load-address-hash)))
 
+;;; Options
+
 (defcustom notmuch-address-command 'internal
   "Determines how address completion candidates are generated.
 
@@ -133,6 +139,14 @@ matching `notmuch-address-completion-headers-regexp'."
   :group 'notmuch-address
   :group 'notmuch-hooks)
 
+(defcustom notmuch-address-use-company t
+  "If available, use company mode for address completion."
+  :type 'boolean
+  :group 'notmuch-send
+  :group 'notmuch-address)
+
+;;; Setup
+
 (defun notmuch-address-selection-function (prompt collection initial-input)
   "Call (`completing-read'
       PROMPT COLLECTION nil nil INITIAL-INPUT 'notmuch-address-history)"
@@ -147,22 +161,13 @@ matching `notmuch-address-completion-headers-regexp'."
 (defun notmuch-address-message-insinuate ()
   (message "calling notmuch-address-message-insinuate is no longer needed"))
 
-(defcustom notmuch-address-use-company t
-  "If available, use company mode for address completion."
-  :type 'boolean
-  :group 'notmuch-send
-  :group 'notmuch-address)
-
 (defun notmuch-address-setup ()
-  (let* ((setup-company (and notmuch-address-use-company
-                            (require 'company nil t)))
-        (pair (cons notmuch-address-completion-headers-regexp
-                    #'notmuch-address-expand-name)))
-    (when setup-company
-      (notmuch-company-setup))
-    (unless (member pair message-completion-alist)
-      (setq message-completion-alist
-           (push pair message-completion-alist)))))
+  (when (and notmuch-address-use-company
+            (require 'company nil t))
+    (notmuch-company-setup))
+  (cl-pushnew (cons notmuch-address-completion-headers-regexp
+                   #'notmuch-address-expand-name)
+             message-completion-alist :test #'equal))
 
 (defun notmuch-address-toggle-internal-completion ()
   "Toggle use of internal completion for current buffer.
@@ -178,12 +183,14 @@ toggles the setting in this buffer."
        (kill-local-variable 'company-idle-delay)
       (setq-local company-idle-delay nil))))
 
+;;; Completion
+
 (defun notmuch-address-matching (substring)
   "Returns a list of completion candidates matching SUBSTRING.
 The candidates are taken from `notmuch-address-completions'."
   (let ((candidates)
        (re (regexp-quote substring)))
-    (maphash (lambda (key val)
+    (maphash (lambda (key _val)
               (when (string-match re key)
                 (push key candidates)))
             notmuch-address-completions)
@@ -250,12 +257,11 @@ requiring external commands."
        (ding))))
    (t nil)))
 
-(defun notmuch-address-harvest-addr (result)
-  (let ((name-addr (plist-get result :name-addr)))
-    (puthash name-addr t notmuch-address-completions)))
+;;; Harvest
 
-(defun notmuch-address-harvest-handle-result (obj)
-  (notmuch-address-harvest-addr obj))
+(defun notmuch-address-harvest-addr (result)
+  (puthash (plist-get result :name-addr)
+          t notmuch-address-completions))
 
 (defun notmuch-address-harvest-filter (proc string)
   (when (buffer-live-p (process-buffer proc))
@@ -264,7 +270,7 @@ requiring external commands."
        (goto-char (point-max))
        (insert string))
       (notmuch-sexp-parse-partial-list
-       'notmuch-address-harvest-handle-result (process-buffer proc)))))
+       'notmuch-address-harvest-addr (process-buffer proc)))))
 
 (defvar notmuch-address-harvest-procs '(nil . nil)
   "The currently running harvests.
@@ -375,7 +381,7 @@ to be a saved address hash."
 (defun notmuch-address--save-address-hash ()
   (when notmuch-address-save-filename
     (if (or (not (file-exists-p notmuch-address-save-filename))
-           ;; The file exists, check it is a file we saved
+           ;; The file exists, check it is a file we saved.
            (notmuch-address--get-address-hash))
        (with-temp-file notmuch-address-save-filename
          (let ((save-plist
@@ -396,17 +402,16 @@ appear to be an address savefile.  Not overwriting."
       (setq notmuch-address-last-harvest now)
       (notmuch-address-harvest
        nil nil
-       (lambda (proc event)
+       (lambda (_proc event)
         ;; If harvest fails, we want to try
-        ;; again when the trigger is next
-        ;; called
+        ;; again when the trigger is next called.
         (if (string= event "finished\n")
             (progn
               (notmuch-address--save-address-hash)
               (setq notmuch-address-full-harvest-finished t))
           (setq notmuch-address-last-harvest 0)))))))
 
-;;
+;;; Standalone completion
 
 (defun notmuch-address-from-minibuffer (prompt)
   (if (not notmuch-address-command)
@@ -425,7 +430,7 @@ appear to be an address savefile.  Not overwriting."
       (let ((minibuffer-local-map rmap))
        (read-string prompt)))))
 
-;;
+;;; _
 
 (provide 'notmuch-address)