Do not enable 'package-autosuggest-mode' by default

As the feature is intrusive and can slow down startup time it is
safer to disable the feature by default.

* doc/emacs/package.texi (Package Installation): Explicitly
mention the minor mode in the manual.
* etc/NEWS: Document it here as well.
* lisp/emacs-lisp/package.el (package-autosuggest-mode): Change
default value to nil and autoload it.

3 files changed, 12 insertions, 3 deletions

diff --git a/doc/emacs/package.texi b/doc/emacs/package.texi
index b91a49cbf2e..7f8b199c9f3 100644
--- a/doc/emacs/package.texi
+++ b/doc/emacs/package.texi
@@ -410,11 +410,13 @@ and use only third parties that you think you can trust!
 
 @cindex suggestions
 @findex package-autosuggest
+@findex package-autosuggest-mode
   Emacs has a built-in database of suggested packages for certain file
 types.  If Emacs opens a file with no specific mode, you can use the
 @code{package-autosuggest} command to install the recommended packages
-from ELPA.  By default, Emacs will display a clickable hint in the
-mode-line if it there is a suggested package.
+from ELPA.  After enabling @code{package-autosuggest-mode}, Emacs will
+display a clickable hint in the mode-line if it there is a suggested
+package.
 
 @anchor{Package Signing}
 @cindex package security
diff --git a/etc/NEWS b/etc/NEWS
index a808cc30b58..dcbe75b6b8b 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -666,6 +666,12 @@ the directory into which the repository was cloned.
 Using a built-in database of package suggestions from ELPA, this command
 will install viable packages if no specific major mode is available.
 
++++
+*** New minor mode 'package-autosuggest-mode'
+When enabled, this displays a hint in the mode line indicating the
+availability of a suggested package.  You can customise the presentation
+of these hints using 'package-autosuggest-style'.
+
 
 * New Modes and Packages in Emacs 31.1
 
diff --git a/lisp/emacs-lisp/package.el b/lisp/emacs-lisp/package.el
index 2849c05fa41..b5c48928fc5 100644
--- a/lisp/emacs-lisp/package.el
+++ b/lisp/emacs-lisp/package.el
@@ -4567,9 +4567,10 @@ the existence of a suggestion."
                  (const :tag "Prompt only once" once)
                  (const :tag "Indicate with message" message)))
 
+;;;###autoload
 (define-minor-mode package-autosuggest-mode
   "Enable the automatic suggestion and installation of packages."
-  :init-value t :global t
+  :global t
   (funcall (if package-autosuggest-mode #'add-hook #'remove-hook)
            'after-change-major-mode-hook
            #'package--autosuggest-after-change-mode))