Merge branch 'main' of https://github.com/jamescherti/minimal-emacs.d

.gitignore

@@ -2,7 +2,6 @@
 !README.md
 !early-init.el
 !init.el
-!.images/
 !.github/
 !.LICENSE
 

.images/made-for-gnu-emacs.svg

@@ -1 +0,0 @@
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early-init.el

@@ -4,21 +4,36 @@
 ;; URL: https://github.com/jamescherti/minimal-emacs.d
 ;; Package-Requires: ((emacs "29.1"))
 ;; Keywords: maint
-;; Version: 1.2.0
+;; Version: 1.2.1
 ;; SPDX-License-Identifier: GPL-3.0-or-later
 
 ;;; Commentary:
-;; The minimal-emacs.d project is a customizable base that provides better Emacs
+;; The minimal-emacs.d project is a lightweight and optimized Emacs base
-;; defaults and optimized startup, intended to serve as a solid foundation for
+;; (init.el and early-init.el) that gives you full control over your
-;; your vanilla Emacs configuration.
+;; configuration. It provides better defaults, an optimized startup, and a clean
+;; foundation for building your own vanilla Emacs setup.
+;;
+;; Building the minimal-emacs.d init.el and early-init.el was the result of
+;; extensive research and testing to fine-tune the best parameters and
+;; optimizations for an Emacs configuration.
+;;
+;; Do not modify this file; instead, modify pre-early-init.el or
+;; post-early-init.el.
 
 ;;; Code:
 
+;;; Internal variables
+
+(defvar minimal-emacs--backup-gc-cons-threshold gc-cons-threshold
+  "Backup of the original value of `gc-cons-threshold' before startup.")
+
+(setq gc-cons-threshold most-positive-fixnum)
+
 ;;; Variables
 
 (defvar minimal-emacs-ui-features '()
   "List of user interface features to enable in minimal Emacs setup.
-This variable holds a list Emacs UI features that can be enabled:
+This variable holds a list of Emacs UI features that can be enabled:
 - context-menu (Enables the context menu in graphical environments.)
 - tool-bar (Enables the tool bar in graphical environments.)
 - menu-bar (Enables the menu bar in graphical environments.)
@@ -31,14 +46,17 @@ This variable holds a list Emacs UI features that can be enabled:
 (defvar minimal-emacs-debug (bound-and-true-p init-file-debug)
   "Non-nil to enable debug.")
 
-(defvar minimal-emacs-gc-cons-threshold (* 32 1024 1024)
-  "Value to set `gc-cons-threshold' to after Emacs startup.
-Ignored if `minimal-emacs-optimize-startup-gc' is nil.")
-
 (defvar minimal-emacs-optimize-startup-gc t
   "If non-nil, increase `gc-cons-threshold' during startup to reduce pauses.
 After Emacs finishes loading, `gc-cons-threshold' is restored to the value
-stored in `minimal-emacs--restore-gc-cons-threshold'.")
+stored in `minimal-emacs-gc-cons-threshold'.")
+
+(defvar minimal-emacs-gc-cons-threshold (* 32 1024 1024)
+  "Value to which `gc-cons-threshold' is set after Emacs startup.
+Ignored if `minimal-emacs-optimize-startup-gc' is nil.")
+
+(defvar minimal-emacs-gc-cons-threshold-restore-delay nil
+  "Number of seconds to wait before restoring `gc-cons-threshold'.")
 
 (defvar minimal-emacs-inhibit-redisplay-during-startup nil
   "Suppress redisplay during startup to improve performance.
@@ -66,15 +84,21 @@ When set to non-nil, Emacs will automatically call `package-initialize' and
 `package-refresh-contents' to set up and update the package system.")
 
 (defvar minimal-emacs-setup-native-compilation t
-  "If non-nil, enable and configure native compilation.
+  "Controls whether native compilation settings are enabled during setup.
-When enabled, this variable sets the following:
+When non-nil, the following variables are set to non-nil to enable
+native compilation features:
 - `native-comp-deferred-compilation'
 - `native-comp-jit-compilation'
-- `package-native-compile'")
+- `package-native-compile'
+If nil, these variables are left at their default values and are not
+modified during setup.")
 
 (defvar minimal-emacs-user-directory user-emacs-directory
   "The default value of the `user-emacs-directory' variable.")
 
+(defvar minimal-emacs-dired-group-directories-first nil
+  "If non-nil, group directories first in Dired listings.")
+
 ;;; Load pre-early-init.el
 
 ;; Prefer loading newer compiled files
@@ -135,22 +159,33 @@ pre-early-init.el, and post-early-init.el.")
 (setq garbage-collection-messages minimal-emacs-debug)
 
 (defun minimal-emacs--restore-gc-cons-threshold ()
-  "Restore `minimal-emacs-gc-cons-threshold'."
+  "Restore `gc-cons-threshold' to `minimal-emacs-gc-cons-threshold'."
-  (setq gc-cons-threshold minimal-emacs-gc-cons-threshold))
+  (if (bound-and-true-p minimal-emacs-gc-cons-threshold-restore-delay)
+      ;; Defer garbage collection during initialization to avoid 2 collections.
+      (run-at-time
+       minimal-emacs-gc-cons-threshold-restore-delay nil
+       (lambda () (setq gc-cons-threshold minimal-emacs-gc-cons-threshold)))
+    (setq gc-cons-threshold minimal-emacs-gc-cons-threshold)))
 
-(when minimal-emacs-optimize-startup-gc
+(if minimal-emacs-optimize-startup-gc
-  (setq gc-cons-threshold most-positive-fixnum)
+    ;; `gc-cons-threshold' is managed by minimal-emacs.d
-  (add-hook 'emacs-startup-hook #'minimal-emacs--restore-gc-cons-threshold 105))
+    (add-hook 'emacs-startup-hook #'minimal-emacs--restore-gc-cons-threshold 105)
+  ;; gc-cons-threshold is not managed by minimal-emacs.d.
+  ;; If it is equal to `most-positive-fixnum', this indicates that the user has
+  ;; not overridden the value in their `pre-early-init.el' configuration.
+  (when (= gc-cons-threshold most-positive-fixnum)
+    (setq gc-cons-threshold minimal-emacs--backup-gc-cons-threshold)))
 
 ;;; Native compilation and Byte compilation
 
 (if (and (featurep 'native-compile)
          (fboundp 'native-comp-available-p)
          (native-comp-available-p))
+    (when minimal-emacs-setup-native-compilation
       ;; Activate `native-compile'
-    (setq native-comp-deferred-compilation minimal-emacs-setup-native-compilation
+      (setq native-comp-deferred-compilation t
-          native-comp-jit-compilation minimal-emacs-setup-native-compilation
+            native-comp-jit-compilation t
-          package-native-compile minimal-emacs-setup-native-compilation)
+            package-native-compile t))
   ;; Deactivate the `native-compile' feature if it is not available
   (setq features (delq 'native-compile features)))
 
@@ -180,6 +215,9 @@ pre-early-init.el, and post-early-init.el.")
 (setq warning-minimum-level (if minimal-emacs-debug :warning :error))
 (setq warning-suppress-types '((lexical-binding)))
 
+(when minimal-emacs-debug
+  (setq message-log-max 16384))
+
 ;;; Performance: Miscellaneous options
 
 ;; Font compacting can be very resource-intensive, especially when rendering
@@ -187,6 +225,10 @@ pre-early-init.el, and post-early-init.el.")
 (setq inhibit-compacting-font-caches t)
 
 (when (and (not (daemonp)) (not noninteractive))
+  ;; Resizing the Emacs frame can be costly when changing the font. Disable this
+  ;; to improve startup times with fonts larger than the system default.
+  (setq frame-resize-pixelwise t)
+
   ;; Without this, Emacs will try to resize itself to a specific column size
   (setq frame-inhibit-implied-resize t)
 
@@ -216,8 +258,13 @@ pre-early-init.el, and post-early-init.el.")
   ;; `inhibit-startup-screen', but it would still initialize anyway.
   (advice-add 'display-startup-screen :override #'ignore)
 
-  ;; Shave seconds off startup time by starting the scratch buffer in
+  ;; The initial buffer is created during startup even in non-interactive
-  ;; `fundamental-mode'
+  ;; sessions, and its major mode is fully initialized. Modes like `text-mode',
+  ;; `org-mode', or even the default `lisp-interaction-mode' load extra packages
+  ;; and run hooks, which can slow down startup.
+  ;;
+  ;; Using `fundamental-mode' for the initial buffer to avoid unnecessary
+  ;; startup overhead.
   (setq initial-major-mode 'fundamental-mode
         initial-scratch-message nil)
 
@@ -416,7 +463,7 @@ this stage of initialization."
 (setq package-archives '(("melpa" . "https://melpa.org/packages/")
                          ("gnu" . "https://elpa.gnu.org/packages/")
                          ("nongnu" . "https://elpa.nongnu.org/nongnu/")))
-(customize-set-variable 'package-archive-priorities '(("gnu"    . 99)
+(setq package-archive-priorities '(("gnu"    . 99)
                                    ("nongnu" . 80)
                                    ("melpa"  . 70)))
 

init.el

@@ -4,13 +4,20 @@
 ;; URL: https://github.com/jamescherti/minimal-emacs.d
 ;; Package-Requires: ((emacs "29.1"))
 ;; Keywords: maint
-;; Version: 1.2.0
+;; Version: 1.2.1
 ;; SPDX-License-Identifier: GPL-3.0-or-later
 
 ;;; Commentary:
-;; The minimal-emacs.d project is a customizable base that provides better Emacs
+;; The minimal-emacs.d project is a lightweight and optimized Emacs base
-;; defaults and optimized startup, intended to serve as a solid foundation for
+;; (init.el and early-init.el) that gives you full control over your
-;; your vanilla Emacs configuration.
+;; configuration. It provides better defaults, an optimized startup, and a clean
+;; foundation for building your own vanilla Emacs setup.
+;;
+;; Building the minimal-emacs.d init.el and early-init.el was the result of
+;; extensive research and testing to fine-tune the best parameters and
+;; optimizations for an Emacs configuration.
+;;
+;; Do not modify this file; instead, modify pre-init.el or post-init.el.
 
 ;;; Code:
 
@@ -31,6 +38,11 @@
     (setq use-short-answers t)
   (advice-add 'yes-or-no-p :override #'y-or-n-p))
 
+;;; Features, warnings, and errors
+
+;; Disable warnings from the legacy advice API. They aren't useful.
+(setq ad-redefinition-action 'accept)
+
 ;;; Undo/redo
 
 (setq undo-limit (* 13 160000)
@@ -51,11 +63,6 @@
   ;; Ensure use-package is available
   (require 'use-package))
 
-;;; Features, warnings, and errors
-
-;; Disable warnings from the legacy advice API. They aren't useful.
-(setq ad-redefinition-action 'accept)
-
 ;;; Minibuffer
 
 ;; Allow nested minibuffers
@@ -69,7 +76,8 @@
 ;;; User interface
 
 ;; By default, Emacs "updates" its ui more often than it needs to
-(setq idle-update-delay 1.0)
+(setq which-func-update-delay 1.0)
+(setq idle-update-delay which-func-update-delay)  ;; Obsolete in >= 30.1
 
 (defalias #'view-hello-file #'ignore)  ; Never show the hello file
 
@@ -77,6 +85,11 @@
 (setq visible-bell nil)
 (setq ring-bell-function #'ignore)
 
+;; In PGTK, this timeout introduces latency. Reducing it from the default 0.1
+;; improves responsiveness of childframes and related packages.
+(when (boundp 'pgtk-wait-for-event-timeout)
+  (setq pgtk-wait-for-event-timeout 0.001))
+
 ;;; Show-paren
 
 (setq show-paren-delay 0.1
@@ -90,13 +103,11 @@
       compilation-ask-about-save nil
       compilation-scroll-output 'first-error)
 
-;; Recenter to the middle of the window for `compile-goto-error', which is also
-;; used by `wgrep' and `embark-export'.
-(setq next-error-recenter '(4))
-
 ;;; Misc
 
-(setq whitespace-line-column nil)  ; whitespace-mode
+(setq custom-buffer-done-kill t)
+
+(setq whitespace-line-column nil)  ; Use the value of `fill-column'.
 
 ;; Can be activated with `display-line-numbers-mode'
 (setq-default display-line-numbers-width 3)
@@ -104,9 +115,6 @@
 
 (setq truncate-string-ellipsis "…")
 
-;; Improve Emacs' responsiveness by delaying syntax highlighting during input
-(setq redisplay-skip-fontification-on-input t)
-
 ;; Disable truncation of printed s-expressions in the message buffer
 (setq eval-expression-print-length nil
       eval-expression-print-level nil)
@@ -114,6 +122,20 @@
 ;; Position underlines at the descent line instead of the baseline.
 (setq x-underline-at-descent-line t)
 
+(setq tramp-verbose 1)
+(setq tramp-completion-reread-directory-timeout 50)
+(setq remote-file-name-inhibit-cache 50)
+
+;; Automatically rescan the buffer for Imenu entries when `imenu' is invoked
+;; This ensures the index reflects recent edits.
+(setq imenu-auto-rescan t)
+
+;; Prevent truncation of long function names in `imenu' listings
+(setq imenu-max-item-length 160)
+
+;; Disable auto-adding a new line at the bottom when scrolling.
+(setq next-line-add-newlines nil)
+
 ;;; Files
 
 ;; Delete by moving to trash in interactive mode
@@ -161,6 +183,7 @@
 
 (setq vc-git-print-log-follow t)
 (setq vc-make-backup-files nil)  ; Do not backup version controlled files
+(setq vc-git-diff-switches '("--histogram"))  ; Faster algorithm for diffing.
 
 ;;; Auto save
 
@@ -226,10 +249,6 @@
 
 ;;; Frames and windows
 
-;; Resizing the Emacs frame can be costly when changing the font. Disable this
-;; to improve startup times with fonts larger than the system default.
-(setq frame-resize-pixelwise t)
-
 ;; However, do not resize windows pixelwise, as this can cause crashes in some
 ;; cases when resizing too many windows at once or rapidly.
 (setq window-resize-pixelwise nil)
@@ -242,6 +261,12 @@
       window-divider-default-places t
       window-divider-default-right-width 1)
 
+;;; Fontification
+
+;; Disable fontification during user input to reduce lag in large buffers.
+;; Also helps marginally with scrolling performance.
+(setq redisplay-skip-fontification-on-input t)
+
 ;;; Scrolling
 
 ;; Enables faster scrolling. This may result in brief periods of inaccurate
@@ -290,8 +315,7 @@
 ;; Don't blink the paren matching the one at point, it's too distracting.
 (setq blink-matching-paren nil)
 
-;; Don't stretch the cursor to fit wide characters, it is disorienting,
+;; Do not extend the cursor to fit wide characters
-;; especially for tabs.
 (setq x-stretch-cursor nil)
 
 ;; Reduce rendering/line scan work by not rendering cursors or regions in
@@ -326,13 +350,18 @@
 ;; when the window is narrower than `truncate-partial-width-windows' characters.
 (setq truncate-partial-width-windows nil)
 
+;; Configure automatic indentation to be triggered exclusively by newline and
+;; DEL (backspace) characters.
+(setq-default electric-indent-chars '(?\n ?\^?))
+
 ;; Prefer spaces over tabs. Spaces offer a more consistent default compared to
 ;; 8-space tabs. This setting can be adjusted on a per-mode basis as needed.
 (setq-default indent-tabs-mode nil
               tab-width 4)
 
 ;; Enable indentation and completion using the TAB key
-(setq-default tab-always-indent nil)
+(setq tab-always-indent 'complete)
+(setq tab-first-completion 'word-or-paren-or-punct)
 
 ;; Perf: Reduce command completion overhead.
 (setq read-extended-command-predicate #'command-completion-default-include-p)
@@ -371,16 +400,22 @@
 
 (setq sh-indent-after-continuation 'always)
 
-;;; Dired
+;;; Dired and ls-lisp
 
 (setq dired-free-space nil
-      dired-dwim-target t  ; Propose a target for intelligent moving or copying.
+      dired-dwim-target t  ; Propose a target for intelligent moving/copying
       dired-deletion-confirmer 'y-or-n-p
       dired-filter-verbose nil
       dired-recursive-deletes 'top
       dired-recursive-copies 'always
-      dired-create-destination-dirs 'ask
+      dired-create-destination-dirs 'ask)
-      image-dired-thumb-size 150)
+
+;; This is a higher-level predicate that wraps `dired-directory-changed-p'
+;; with additional logic. This `dired-buffer-stale-p' predicate handles remote
+;; files, wdired, unreadable dirs, and delegates to dired-directory-changed-p
+;; for modification checks.
+(setq auto-revert-remote-files nil)
+(setq dired-auto-revert-buffer 'dired-buffer-stale-p)
 
 (setq dired-vc-rename-file t)
 
@@ -391,7 +426,18 @@
 (setq dired-omit-verbose nil)
 (setq dired-omit-files (concat "\\`[.]\\'"))
 
-;; ls-lisp
+;; Group directories first
+(when minimal-emacs-dired-group-directories-first
+  (with-eval-after-load 'dired
+    (let ((args "--group-directories-first -ahlv"))
+      (when (or (eq system-type 'darwin)
+                (eq system-type 'berkeley-unix))
+        (if-let* ((gls (executable-find "gls")))
+            (setq insert-directory-program gls)
+          (setq args nil)))
+      (when args
+        (setq dired-listing-switches args)))))
+
 (setq ls-lisp-verbosity nil)
 (setq ls-lisp-dirs-first t)
 
@@ -416,29 +462,31 @@
 
 ;;; Eglot
 
-(setq eglot-sync-connect 1
+;; A setting of nil or 0 means Eglot will not block the UI at all, allowing
-      eglot-autoshutdown t)
+;; Emacs to remain fully responsive, although LSP features will only become
+;; available once the connection is established in the background.
+(setq eglot-sync-connect 0)
+
+(setq eglot-autoshutdown t)  ; Shut down server after killing last managed buffer
 
 ;; Activate Eglot in cross-referenced non-project files
 (setq eglot-extend-to-xref t)
 
 ;; Eglot optimization
+(if minimal-emacs-debug
+    (setq eglot-events-buffer-config '(:size 2000000 :format full))
+  ;; This reduces log clutter to improves performance.
   (setq jsonrpc-event-hook nil)
-(setq eglot-events-buffer-size 0)
+  ;; Reduce memory usage and avoid cluttering *EGLOT events* buffer
-(setq eglot-report-progress nil)  ; Prevent Eglot minibuffer spam
+  (setq eglot-events-buffer-size 0)  ; Deprecated
+  (setq eglot-events-buffer-config '(:size 0 :format short)))
 
-;; Eglot optimization: Disable `eglot-events-buffer' to maintain consistent
+(setq eglot-report-progress minimal-emacs-debug)  ; Prevent minibuffer spam
-;; performance in long-running Emacs sessions.
-(setq eglot-events-buffer-config '(:size 0 :format full))
 
 ;;; Flymake
 
-(setq flymake-fringe-indicator-position 'left-fringe)
 (setq flymake-show-diagnostics-at-end-of-line nil)
 
-;; Suppress the display of Flymake error counters when there are no errors.
-(setq flymake-suppress-zero-counters t)
-
 ;; Disable wrapping around when navigating Flymake errors.
 (setq flymake-wrap-around nil)
 
@@ -459,8 +507,8 @@
 
 (setq flyspell-issue-welcome-flag nil)
 
-;; Greatly improves flyspell performance by preventing messages from being
+;; Improves flyspell performance by preventing messages from being displayed for
-;; displayed for each word when checking the entire buffer.
+;; each word when checking the entire buffer.
 (setq flyspell-issue-message-flag nil)
 
 ;;; ispell
@@ -475,7 +523,7 @@
 
 (setq ibuffer-formats
       '((mark modified read-only locked
-              " " (name 40 40 :left :elide)
+              " " (name 55 55 :left :elide)
               " " (size 8 -1 :right)
               " " (mode 18 18 :left :elide) " " filename-and-process)
         (mark " " (name 16 -1) " " filename)))
@@ -498,13 +546,22 @@
 ;;; dabbrev
 
 (setq dabbrev-upcase-means-case-search t)
+
 (setq dabbrev-ignored-buffer-modes
       '(archive-mode image-mode docview-mode tags-table-mode pdf-view-mode))
 
+(setq dabbrev-ignored-buffer-regexps
+      '(;; - Buffers starting with a space (internal or temporary buffers)
+        "\\` "
+        ;; Tags files such as ETAGS, GTAGS, RTAGS, TAGS, e?tags, and GPATH,
+        ;; including versions with numeric extensions like <123>
+        "\\(?:\\(?:[EG]?\\|GR\\)TAGS\\|e?tags\\|GPATH\\)\\(<[0-9]+>\\)?"))
+
 ;;; Remove warnings from narrow-to-region, upcase-region...
 
 (dolist (cmd '(list-timers narrow-to-region upcase-region downcase-region
-                           erase-buffer scroll-left dired-find-alternate-file))
+                           list-threads erase-buffer scroll-left
+                           dired-find-alternate-file))
   (put cmd 'disabled nil))
 
 ;;; Load post init