* lisp/gnus/nnmaildir.el: Silence lexical warnings

* lisp/gnus/nnmaildir.el (nnmaildir--prepare): Use a more
functional style.
(nnmaildir--update-nov): Remove unused var `numdir'.
(nnmaildir-request-type, nnmaildir--scan, nnmaildir-request-newgroups)
(nnmaildir-request-group, nnmaildir-request-create-group)
(nnmaildir-request-post, nnmaildir-request-move-article)
(nnmaildir-request-accept-article, nnmaildir-active-number): Mark unused args.
(nnmaildir-get-new-mail, nnmaildir-group-alist)
(nnmaildir-active-file): Declare.
(nnmaildir-request-scan): Remove unused vars `group' and `grp-dir'.
(nnmaildir-request-update-info): Remove unused vars `dotfile', `num',
`mark', `end', `new-mark', and `mark-sym'.
(nnmaildir-retrieve-headers): Remove unused args `srv-dir', `dir',
`nlist2'.
(nnmaildir-request-expire-articles):
Remove unused vars `article', `stop' and `nlist2'.
(nnmaildir-request-set-mark): Remove unused vars `begin', `article' and
`end'.  Use nnmaildir--article when dyn-binding is needed.
Give the value directly in the `let' for `del-mark', `del-action',
`add-action', and `set-action'.  Don't use `add-to-list' on a local var.
(nnmaildir-close-server): Declare those local vars that need to be
dyn-bound.

1 files changed, 63 insertions, 58 deletions

diff --git a/lisp/gnus/nnmaildir.el b/lisp/gnus/nnmaildir.el
index da3d5460c2b..097d4f8b618 100644
--- a/lisp/gnus/nnmaildir.el
+++ b/lisp/gnus/nnmaildir.el
@@ -333,29 +333,24 @@ by nnmaildir-request-article.")
 ;; given group, if non-nil, be the current group of the current server.  Then
 ;; return the group object for the current group.
 (defun nnmaildir--prepare (server group)
-  (let (x groups)
-    (catch 'return
-      (if (null server)
-          (unless (setq server nnmaildir--cur-server)
-            (throw 'return nil))
-        (unless (setq server (intern-soft server nnmaildir--servers))
+  (catch 'return
+    (if (null server)
+        (unless (setq server nnmaildir--cur-server)
           (throw 'return nil))
-        (setq server (symbol-value server)
-              nnmaildir--cur-server server))
-      (unless (setq groups (nnmaildir--srv-groups server))
+      (unless (setq server (intern-soft server nnmaildir--servers))
         (throw 'return nil))
-      (unless (nnmaildir--srv-method server)
-        (setq x (concat "nnmaildir:" (nnmaildir--srv-address server))
-              x (gnus-server-to-method x))
-        (unless x (throw 'return nil))
-        (setf (nnmaildir--srv-method server) x))
-      (if (null group)
-          (unless (setq group (nnmaildir--srv-curgrp server))
-            (throw 'return nil))
-        (unless (setq group (intern-soft group groups))
-          (throw 'return nil))
-        (setq group (symbol-value group)))
-      group)))
+      (setq server (symbol-value server)
+            nnmaildir--cur-server server))
+    (let ((groups (nnmaildir--srv-groups server)))
+      (when groups
+        (unless (nnmaildir--srv-method server)
+          (setf (nnmaildir--srv-method server)
+                (or (gnus-server-to-method
+                     (concat "nnmaildir:" (nnmaildir--srv-address server)))
+                    (throw 'return nil))))
+        (if (null group)
+            (nnmaildir--srv-curgrp server)
+          (symbol-value (intern-soft group groups)))))))
 
 (defun nnmaildir--tab-to-space (string)
   (let ((pos 0))
@@ -428,7 +423,7 @@ by nnmaildir-request-article.")
         (srv-dir (nnmaildir--srv-dir server))
         (storage-version 1) ;; [version article-number msgid [...nov...]]
         dir gname pgname msgdir prefix suffix file attr mtime novdir novfile
-        nov msgid nov-beg nov-mid nov-end field val old-extra num numdir
+        nov msgid nov-beg nov-mid nov-end field val old-extra num
         deactivate-mark)
     (catch 'return
       (setq gname (nnmaildir--grp-name group)
@@ -668,7 +663,7 @@ by nnmaildir-request-article.")
     "/" "\\057" 'literal)
    ":" "\\072" 'literal))
 
-(defun nnmaildir-request-type (group &optional article)
+(defun nnmaildir-request-type (_group &optional _article)
   'mail)
 
 (defun nnmaildir-status-message (&optional server)
@@ -768,7 +763,7 @@ by nnmaildir-request-article.")
     (if (> (aref a 1) (aref b 1)) (throw 'return nil))
     (string-lessp (aref a 2) (aref b 2))))
 
-(defun nnmaildir--scan (gname scan-msgs groups method srv-dir srv-ls)
+(defun nnmaildir--scan (gname scan-msgs groups _method srv-dir srv-ls)
   (catch 'return
     (let ((36h-ago (- (car (current-time)) 2))
           absdir nndir tdir ndir cdir nattr cattr isnew pgname read-only ls
@@ -883,6 +878,10 @@ by nnmaildir-request-article.")
         (setf (nnmaildir--grp-cur group) cattr)))
     t))
 
+(defvar nnmaildir-get-new-mail)
+(defvar nnmaildir-group-alist)
+(defvar nnmaildir-active-file)
+
 (defun nnmaildir-request-scan (&optional scan-group server)
   (let ((coding-system-for-write nnheader-file-coding-system)
         (buffer-file-coding-system nil)
@@ -890,7 +889,7 @@ by nnmaildir-request-article.")
         (nnmaildir-get-new-mail t)
         (nnmaildir-group-alist nil)
         (nnmaildir-active-file nil)
-        x srv-ls srv-dir method groups target-prefix group dirs grp-dir seen
+        x srv-ls srv-dir method groups target-prefix dirs seen
         deactivate-mark)
     (nnmaildir--prepare server nil)
     (setq srv-ls (nnmaildir--srv-ls nnmaildir--cur-server)
@@ -966,7 +965,7 @@ by nnmaildir-request-article.")
                 (nnmaildir--srv-groups nnmaildir--cur-server))))
   t)
 
-(defun nnmaildir-request-newgroups (date &optional server)
+(defun nnmaildir-request-newgroups (_date &optional server)
   (nnmaildir-request-list server))
 
 (defun nnmaildir-retrieve-groups (groups &optional server)
@@ -995,9 +994,9 @@ by nnmaildir-request-article.")
                   (nnmaildir--srvgrp-dir
                    (nnmaildir--srv-dir nnmaildir--cur-server) gname)))
          (curdir-mtime (nth 5 (file-attributes curdir)))
-         pgname flist always-marks never-marks old-marks dotfile num dir
-         all-marks marks mark ranges markdir read end new-marks ls
-         old-mmth new-mmth mtime mark-sym existing missing deactivate-mark)
+         pgname flist always-marks never-marks old-marks dir
+         all-marks marks ranges markdir read ls
+         old-mmth new-mmth mtime existing missing deactivate-mark)
     (catch 'return
       (unless group
         (setf (nnmaildir--srv-error nnmaildir--cur-server)
@@ -1096,7 +1095,7 @@ by nnmaildir-request-article.")
       (setf (nnmaildir--grp-mmth group) new-mmth)
       info)))
 
-(defun nnmaildir-request-group (gname &optional server fast info)
+(defun nnmaildir-request-group (gname &optional server fast _info)
   (let ((group (nnmaildir--prepare server gname))
         deactivate-mark)
     (catch 'return
@@ -1119,7 +1118,7 @@ by nnmaildir-request-article.")
         (insert " " (gnus-replace-in-string gname " " "\\ " t) "\n")
         t))))
 
-(defun nnmaildir-request-create-group (gname &optional server args)
+(defun nnmaildir-request-create-group (gname &optional server _args)
   (nnmaildir--prepare server nil)
   (catch 'return
     (let ((target-prefix (nnmaildir--srv-target-prefix nnmaildir--cur-server))
@@ -1265,7 +1264,7 @@ by nnmaildir-request-article.")
 
 (defun nnmaildir-retrieve-headers (articles &optional gname server fetch-old)
   (let ((group (nnmaildir--prepare server gname))
-        srv-dir dir nlist mlist article num start stop nov nlist2 insert-nov
+        nlist mlist article num start stop nov insert-nov
         deactivate-mark)
     (setq insert-nov
           (lambda (article)
@@ -1290,9 +1289,7 @@ by nnmaildir-request-article.")
         (erase-buffer)
         (setq mlist (nnmaildir--grp-mlist group)
               nlist (nnmaildir--grp-nlist group)
-              gname (nnmaildir--grp-name group)
-              srv-dir (nnmaildir--srv-dir nnmaildir--cur-server)
-              dir (nnmaildir--srvgrp-dir srv-dir gname))
+              gname (nnmaildir--grp-name group))
         (cond
          ((null nlist))
          ((and fetch-old (not (numberp fetch-old)))
@@ -1363,7 +1360,7 @@ by nnmaildir-request-article.")
         (nnheader-insert-file-contents nnmaildir-article-file-name))
       (cons gname num-msgid))))
 
-(defun nnmaildir-request-post (&optional server)
+(defun nnmaildir-request-post (&optional _server)
   (let (message-required-mail-headers)
     (funcall message-send-mail-function)))
 
@@ -1405,7 +1402,7 @@ by nnmaildir-request-article.")
       t)))
 
 (defun nnmaildir-request-move-article (article gname server accept-form
-                                               &optional last move-is-internal)
+                                       &optional _last _move-is-internal)
   (let ((group (nnmaildir--prepare server gname))
         pgname suffix result nnmaildir--file deactivate-mark)
     (catch 'return
@@ -1442,7 +1439,7 @@ by nnmaildir-request-article.")
         (nnmaildir--expired-article group article))
       result)))
 
-(defun nnmaildir-request-accept-article (gname &optional server last)
+(defun nnmaildir-request-accept-article (gname &optional server _last)
   (let ((group (nnmaildir--prepare server gname))
         (coding-system-for-write nnheader-file-coding-system)
         (buffer-file-coding-system nil)
@@ -1546,7 +1543,7 @@ by nnmaildir-request-article.")
                     ga))
              group-art)))))
 
-(defun nnmaildir-active-number (gname)
+(defun nnmaildir-active-number (_gname)
   0)
 
 (declare-function gnus-group-mark-article-read "gnus-group" (group article))
@@ -1554,8 +1551,8 @@ by nnmaildir-request-article.")
 (defun nnmaildir-request-expire-articles (ranges &optional gname server force)
   (let ((no-force (not force))
         (group (nnmaildir--prepare server gname))
-        pgname time boundary bound-iter high low target dir nlist nlist2
-        stop article didnt nnmaildir--file nnmaildir-article-file-name
+        pgname time boundary bound-iter high low target dir nlist
+        didnt nnmaildir--file nnmaildir-article-file-name
         deactivate-mark)
     (catch 'return
       (unless group
@@ -1637,6 +1634,8 @@ by nnmaildir-request-article.")
         (erase-buffer))
       didnt)))
 
+(defvar nnmaildir--article)
+
 (defun nnmaildir-request-set-mark (gname actions &optional server)
   (let* ((group (nnmaildir--prepare server gname))
          (curdir (nnmaildir--cur
@@ -1646,27 +1645,30 @@ by nnmaildir-request-article.")
          (coding-system-for-write nnheader-file-coding-system)
          (buffer-file-coding-system nil)
          (file-coding-system-alist nil)
-         del-mark del-action add-action set-action marksdir nlist
-         ranges begin end article all-marks todo-marks mdir mfile
-         pgname ls permarkfile deactivate-mark)
-    (setq del-mark
+         marksdir nlist
+         ranges all-marks todo-marks mdir mfile
+         pgname ls permarkfile deactivate-mark
+         (del-mark
           (lambda (mark)
-            (let ((prefix (nnmaildir--art-prefix article))
-                  (suffix (nnmaildir--art-suffix article))
+            (let ((prefix (nnmaildir--art-prefix nnmaildir--article))
+                  (suffix (nnmaildir--art-suffix nnmaildir--article))
                   (flag (nnmaildir--mark-to-flag mark)))
               (when flag
                 ;; If this mark corresponds to a flag, remove the flag from
                 ;; the file name.
                 (nnmaildir--article-set-flags
-                 article (nnmaildir--remove-flag flag suffix) curdir))
+                 nnmaildir--article (nnmaildir--remove-flag flag suffix)
+                 curdir))
               ;; We still want to delete the hardlink in the marks dir if
               ;; present, regardless of whether this mark has a maildir flag or
               ;; not, to avoid getting out of sync.
               (setq mfile (nnmaildir--subdir marksdir (symbol-name mark))
                     mfile (concat mfile prefix))
-              (nnmaildir--unlink mfile)))
-          del-action (lambda (article) (mapcar del-mark todo-marks))
-          add-action
+              (nnmaildir--unlink mfile))))
+         (del-action (lambda (article)
+                       (let ((nnmaildir--article article))
+                         (mapcar del-mark todo-marks))))
+         (add-action
           (lambda (article)
             (mapcar
              (lambda (mark)
@@ -1695,13 +1697,14 @@ by nnmaildir-request-article.")
                          (rename-file permarkfilenew permarkfile 'replace)
                          (add-name-to-file permarkfile mfile)))
                       (t (signal (car err) (cdr err))))))))
-             todo-marks))
-          set-action (lambda (article)
+             todo-marks)))
+         (set-action (lambda (article)
                        (funcall add-action article)
-                       (mapcar (lambda (mark)
-                                 (unless (memq mark todo-marks)
-                                   (funcall del-mark mark)))
-                               all-marks)))
+                       (let ((nnmaildir--article article))
+                         (mapcar (lambda (mark)
+                                   (unless (memq mark todo-marks)
+                                     (funcall del-mark mark)))
+                                 all-marks)))))
     (catch 'return
       (unless group
         (setf (nnmaildir--srv-error nnmaildir--cur-server)
@@ -1728,7 +1731,7 @@ by nnmaildir-request-article.")
         (setq ranges (car action)
               todo-marks (caddr action))
         (dolist (mark todo-marks)
-          (add-to-list 'all-marks mark))
+          (pushnew mark all-marks :test #'equal))
         (if (numberp (cdr ranges)) (setq ranges (list ranges)))
         (nnmaildir--nlist-iterate nlist ranges
                                   (cond ((eq 'del (cadr action)) del-action)
@@ -1775,6 +1778,8 @@ by nnmaildir-request-article.")
       t)))
 
 (defun nnmaildir-close-server (&optional server)
+  (defvar flist) (defvar ls) (defvar dirs) (defvar dir)
+  (defvar files) (defvar file) (defvar x)
   (let (flist ls dirs dir files file x)
     (nnmaildir--prepare server nil)
     (when nnmaildir--cur-server