Revert commit that broke 'make bootstrap'

* lisp/custom.el (custom-declare-variable): Revert commit
79fac080d277fed07b3c192890ad59d36d9f83b6.  custom.el needs to work
even when pcase has not been defined yet, when doing bootstrapping.

1 files changed, 34 insertions, 23 deletions

diff --git a/lisp/custom.el b/lisp/custom.el
index cc284ef51ce..c5d0e65f42b 100644
--- a/lisp/custom.el
+++ b/lisp/custom.el
@@ -155,29 +155,40 @@ set to nil, as the value is no longer rogue."
     (unless (memq :group args)
       (custom-add-to-group (custom-current-group) symbol 'custom-variable))
     (while args
-      (let ((keyword (pop args)))
-        (unless (symbolp keyword)
-          (error "Junk in args %S" (cons keyword args)))
-        (unless args
-          (error "Keyword %s is missing an argument" keyword))
-        (let ((value (pop args)))
-          (pcase keyword
-            (`:initialize (setq initialize value))
-            (`:set (put symbol 'custom-set value))
-            (`:get (put symbol 'custom-get value))
-            (`:require (push value requests))
-            (`:risky (put symbol 'risky-local-variable value))
-            (`:safe (put symbol 'safe-local-variable value))
-            (`:type (put symbol 'custom-type (purecopy value)))
-            (`:options (if (get symbol 'custom-options)
-                           ;; Slow safe code to avoid duplicates.
-                           (mapc (lambda (option)
-                                   (custom-add-option symbol option))
-                                 value)
-                         ;; Fast code for the common case.
-                         (put symbol 'custom-options (copy-sequence value))))
-            (_ (custom-handle-keyword symbol keyword value
-                                'custom-variable))))))
+      (let ((arg (car args)))
+        (setq args (cdr args))
+        (unless (symbolp arg)
+          (error "Junk in args %S" args))
+        (let ((keyword arg)
+              (value (car args)))
+          (unless args
+            (error "Keyword %s is missing an argument" keyword))
+          (setq args (cdr args))
+          (cond ((eq keyword :initialize)
+                 (setq initialize value))
+                ((eq keyword :set)
+                 (put symbol 'custom-set value))
+                ((eq keyword :get)
+                 (put symbol 'custom-get value))
+                ((eq keyword :require)
+                 (push value requests))
+                ((eq keyword :risky)
+                 (put symbol 'risky-local-variable value))
+                ((eq keyword :safe)
+                 (put symbol 'safe-local-variable value))
+                ((eq keyword :type)
+                 (put symbol 'custom-type (purecopy value)))
+                ((eq keyword :options)
+                 (if (get symbol 'custom-options)
+                     ;; Slow safe code to avoid duplicates.
+                     (mapc (lambda (option)
+                             (custom-add-option symbol option))
+                           value)
+                   ;; Fast code for the common case.
+                   (put symbol 'custom-options (copy-sequence value))))
+                (t
+                 (custom-handle-keyword symbol keyword value
+                                        'custom-variable))))))
     (put symbol 'custom-requests requests)
     ;; Do the actual initialization.
     (unless custom-dont-initialize