dump: save dump files in .cache/dumps directory

EXPERIMENTAL.org

@@ -80,12 +80,11 @@ in the dump."
    ;; (default nil)
    dotspacemacs-emacs-pdumper-executable-file nil
 
-   ;; File path of Spacemacs dump file. This is the file created by the portable
-   ;; dumper. To load it when starting Emacs add the parameter `--dump-file'
+   ;; Name of the Spacemacs dump file. This is the file will be created by the
+   ;; portable dumper in the cache directory under dumps sub-directory.
+   ;; To load it when starting Emacs add the parameter `--dump-file'
    ;; when invoking Emacs 27.1 executable on the command line, for instance:
-   ;;   ./emacs --dump-file=spacemacs.pdump
-   ;; If the file path is relative, it will be relative to the directory pointed
-   ;; by `dotspacemacs-emacs-pdumper-executable-file'.
+   ;;   ./emacs --dump-file=/Users/sylvain/.emacs.d/.cache/dumps/spacemacs.pdmp
    ;; (default spacemacs.pdmp)
    dotspacemacs-emacs-dumper-dump-file "spacemacs.pdmp"))
 #+END_SRC
@@ -106,7 +105,7 @@ To actually start Spacemacs with the compiled Emacs 27.1 and the Spacemacs dump,
 on the command line in the =src= directory of the cloned Emacs source:
 
 #+BEGIN_SRC shell
-  ./emacs --dump-file=spacemacs.pdmp &
+  ./emacs --dump-file=/Users/sylvain/.emacs.d/.cache/dumps/spacemacs.pdmp &
 #+END_SRC
 
 *** Report issues
@@ -125,7 +124,7 @@ To use the created dump file, open a shell in the =src= directory of the cloned
 Emacs source and type:
 
 #+BEGIN_SRC shell
-  ./emacs --dump-file=spacemacs.pdmp &
+  ./emacs --dump-file=/Users/sylvain/.emacs.d/.cache/dumps/spacemacs.pdmp &
 #+END_SRC
 
 =spacemacs.pdmp= corresponds the value of the variable

core/core-dotspacemacs.el

@@ -61,12 +61,11 @@ for the portable dumper (this is currently the branch pdumper).
 If nil then automatic dump of emacs is disabled.")
 
 (defvar dotspacemacs-emacs-dumper-dump-file "spacemacs.pdmp"
-  "File path of Spacemacs dump file. This is the file created by the portable
-dumper. To load it when starting Emacs add the parameter `--dump-file'
+  "Name of the Spacemacs dump file. This is the file will be created by the
+portable dumper in the cache directory under dumps sub-directory.
+To load it when starting Emacs add the parameter `--dump-file'
 when invoking Emacs 27.1 executable on the command line, for instance:
-./emacs --dump-file=spacemacs.pdump
-If the file path is relative, it will be relative to the directory pointed
-by `dotspacemacs-emacs-pdumper-executable-file'.")
+./emacs --dump-file=/Users/sylvain/.emacs.d/.cache/dumps/spacemacs.pdmp")
 
 (defvar dotspacemacs-gc-cons '(100000000 0.1)
   "Set `gc-cons-threshold' and `gc-cons-percentage' when startup finishes.

core/core-dumper.el

@@ -12,6 +12,9 @@
 (defvar spacemacs-dump-mode 'not-dumped
   "Spacemacs dump mode, can be `not-dumped', `dumped' or `dumping'.")
 
+(defconst spacemacs-dump-directory
+  (concat spacemacs-cache-directory "dumps/"))
+
 (defun spacemacs/defer ()
   "Return non-nil if dump is not supported."
   (eq 'not-dumped spacemacs-dump-mode))
@@ -58,15 +61,18 @@ You should not used this function, it is reserved for some specific process."
   "Dump emacs in a subprocess."
   (let ((default-directory (file-name-directory
                             dotspacemacs-emacs-pdumper-executable-file)))
+    (make-directory spacemacs-dump-directory t)
     (make-process
      :name "spacemacs-dumper"
      :buffer "*spacemacs-dumper*"
-     :command (list dotspacemacs-emacs-pdumper-executable-file
-                    "--batch"
-                    "-l" "~/.emacs.d/dump-init.el"
-                    "-eval" (concat "(dump-emacs-portable \""
-                                    dotspacemacs-emacs-dumper-dump-file
-                                    "\")")))))
+     :command
+     (list dotspacemacs-emacs-pdumper-executable-file
+           "--batch"
+           "-l" "~/.emacs.d/dump-init.el"
+           "-eval" (concat "(dump-emacs-portable \""
+                           (concat spacemacs-dump-directory
+                                   dotspacemacs-emacs-dumper-dump-file)
+                           "\")")))))
 
 ;; ;; Brute-force load all .el files in ELPA packages
 ;; (dolist (d (directory-files package-user-dir t nil 'nosort))

core/templates/.spacemacs.template

@@ -449,13 +449,12 @@ in the dump."
    ;; (default nil)
    dotspacemacs-emacs-pdumper-executable-file nil
 
-   ;; File path of Spacemacs dump file. This is the file created by the portable
-   ;; dumper. To load it when starting Emacs add the parameter `--dump-file'
+   ;; Name of the Spacemacs dump file. This is the file will be created by the
+   ;; portable dumper in the cache directory under dumps sub-directory.
+   ;; To load it when starting Emacs add the parameter `--dump-file'
    ;; when invoking Emacs 27.1 executable on the command line, for instance:
-   ;;   ./emacs --dump-file=spacedump.pdump
-   ;; If the file path is relative, it will be relative to the directory pointed
-   ;; by `dotspacemacs-emacs-pdumper-executable-file'.
-   ;; (default spacedump.pdmp)
+   ;;   ./emacs --dump-file=~/.emacs.d/.cache/dumps/spacedump.pdmp
+   ;; (default spacemacs.pdmp)
    dotspacemacs-emacs-dumper-dump-file "spacemacs.pdmp"))
 
 (defun dotspacemacs/user-config ()