Refactor: split one file to core and segments.

doom-modeline-core.el

@@ -0,0 +1,614 @@
+;;; doom-modeline-core.el --- The core libraries for doom-modeline -*- lexical-binding: t; -*-
+
+;; Copyright (C) 2018-2019 Vincent Zhang
+
+;; This file is not part of GNU Emacs.
+
+;;
+;; This program is free software; you can redistribute it and/or
+;; modify it under the terms of the GNU General Public License as
+;; published by the Free Software Foundation; either version 2, or
+;; (at your option) any later version.
+;;
+;; This program is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+;; General Public License for more details.
+;;
+;; You should have received a copy of the GNU General Public License
+;; along with this program; see the file COPYING.  If not, write to
+;; the Free Software Foundation, Inc., 51 Franklin Street, Fifth
+;; Floor, Boston, MA 02110-1301, USA.
+;;
+
+;;; Commentary:
+;;
+;; The core libraries for doom-modeline.
+;;
+
+;;; Code:
+
+(require 'all-the-icons)
+(require 'eldoc-eval)
+(require 'shrink-path)
+(require 'subr-x)
+(when (>= emacs-major-version 26)
+  (require 'project))
+
+
+;;
+;; Compatibilities
+;;
+
+(unless (>= emacs-major-version 26)
+  (with-no-warnings
+    ;; Define `if-let*' and `when-let*' variants for 25 users.
+    (defalias 'if-let* #'if-let)
+    (defalias 'when-let* #'when-let)))
+
+;; Don’t compact font caches during GC.
+(if (eq system-type 'windows-nt)
+    (setq inhibit-compacting-font-caches t))
+
+;;`file-local-name' is introduced in 25.2.2.
+(unless (fboundp 'file-local-name)
+  (defun file-local-name (file)
+    "Return the local name component of FILE.
+It returns a file name which can be used directly as argument of
+`process-file', `start-file-process', or `shell-command'."
+    (or (file-remote-p file 'localname) file)))
+
+;;
+;; Variables
+;;
+
+(defvar doom-modeline-height (let ((font (face-font 'mode-line)))
+                               (if (and font (fboundp 'font-info))
+                                   (* 2 (aref (font-info font) 2))
+                                 25))
+  "How tall the mode-line should be (only respected in GUI Emacs).")
+
+(defvar doom-modeline-bar-width (if (eq system-type 'darwin) 3 6)
+  "How wide the mode-line bar should be (only respected in GUI Emacs).")
+
+(defvar doom-modeline-buffer-file-name-style 'truncate-upto-project
+  "Determines the style used by `doom-modeline-buffer-file-name'.
+
+Given ~/Projects/FOSS/emacs/lisp/comint.el
+  truncate-upto-project => ~/P/F/emacs/lisp/comint.el
+  truncate-from-project => ~/Projects/FOSS/emacs/l/comint.el
+  truncate-with-project => emacs/l/comint.el
+  truncate-except-project => ~/P/F/emacs/l/comint.el
+  truncate-upto-root => ~/P/F/e/lisp/comint.el
+  truncate-all => ~/P/F/e/l/comint.el
+  relative-from-project => emacs/lisp/comint.el
+  relative-to-project => lisp/comint.el
+  file-name => comint.el
+  buffer-name => comint.el<2> (uniquify buffer name)")
+
+(defvar doom-modeline-python-executable "python"
+  "What executable of Python will be used (if nil nothing will be showed).")
+
+(defvar doom-modeline-icon (display-graphic-p)
+  "Whether show `all-the-icons' or not.
+
+Non-nil to show the icons in mode-line.
+The icons may not be showed correctly in terminal and on Windows.")
+
+(defvar doom-modeline-major-mode-icon t
+  "Whether show the icon for major mode. It respects `doom-modeline-icon'.")
+
+(defvar doom-modeline-major-mode-color-icon nil
+  "Display color icons for `major-mode'. It respects `all-the-icons-color-icons'.")
+
+(defvar doom-modeline-minor-modes nil
+  "Whether display minor modes or not. Non-nil to display in mode-line.")
+
+(defvar doom-modeline-persp-name t
+  "Whether display perspective name or not. Non-nil to display in mode-line.")
+
+(defvar doom-modeline-lsp t
+  "Whether display `lsp' state or not. Non-nil to display in mode-line.")
+
+(defvar doom-modeline-github t
+  "Whether display github notifications or not. Requires `ghub' package.")
+
+(defvar doom-modeline-github-interval (* 30 60)
+  "The interval of checking github.")
+
+(defvar doom-modeline-version t
+  "Whether display environment version or not.")
+
+
+;;
+;; Custom faces
+;;
+
+(defgroup doom-modeline nil
+  "Doom mode-line faces."
+  :group 'faces)
+
+(defface doom-modeline-buffer-path
+  '((t (:inherit (mode-line-emphasis bold))))
+  "Face used for the dirname part of the buffer path.")
+
+(defface doom-modeline-buffer-file
+  '((t (:inherit (mode-line-buffer-id bold))))
+  "Face used for the filename part of the mode-line buffer path.")
+
+(defface doom-modeline-buffer-modified
+  '((t (:inherit (error bold) :background nil)))
+  "Face used for the 'unsaved' symbol in the mode-line.")
+
+(defface doom-modeline-buffer-major-mode
+  '((t (:inherit (mode-line-emphasis bold))))
+  "Face used for the major-mode segment in the mode-line.")
+
+(defface doom-modeline-buffer-minor-mode
+  '((t (:inherit (mode-line-buffer-id bold))))
+  "Face used for the minor-modes segment in the mode-line.")
+
+(defface doom-modeline-project-root-dir
+  '((t (:inherit (mode-line-emphasis bold))))
+  "Face used for the project part of the mode-line buffer path.")
+
+(defface doom-modeline-highlight
+  '((t (:inherit mode-line-emphasis)))
+  "Face for bright segments of the mode-line.")
+
+(defface doom-modeline-panel
+  '((t (:inherit mode-line-highlight)))
+  "Face for 'X out of Y' segments, such as `doom-modeline--anzu',
+`doom-modeline--evil-substitute' and`iedit'")
+
+(defface doom-modeline-info
+  `((t (:inherit (success bold))))
+  "Face for info-level messages in the modeline. Used by `*vc'.")
+
+(defface doom-modeline-warning
+  `((t (:inherit (warning bold))))
+  "Face for warnings in the modeline. Used by `*flycheck'")
+
+(defface doom-modeline-urgent
+  `((t (:inherit (error bold))))
+  "Face for errors in the modeline. Used by `*flycheck'")
+
+;; Bar
+(defface doom-modeline-bar '((t (:inherit highlight)))
+  "The face used for the left-most bar on the mode-line of an active window.")
+
+(defface doom-modeline-eldoc-bar `((t (:background ,(face-foreground 'success))))
+  "The face used for the left-most bar on the mode-line when eldoc-eval is active.")
+
+(defface doom-modeline-inactive-bar `((t (:background ,(face-foreground 'mode-line-inactive))))
+  "The face used for the left-most bar on the mode-line of an inactive window.")
+
+(defface doom-modeline-evil-emacs-state '((t (:inherit doom-modeline-warning)))
+  "Face for the Emacs state tag in evil state indicator.")
+
+(defface doom-modeline-evil-insert-state '((t (:inherit doom-modeline-urgent)))
+  "Face for the insert state tag in evil state indicator.")
+
+(defface doom-modeline-evil-motion-state '((t :inherit doom-modeline-buffer-path))
+  "Face for the motion state tag in evil state indicator.")
+
+(defface doom-modeline-evil-normal-state '((t (:inherit doom-modeline-info)))
+  "Face for the normal state tag in evil state indicator.")
+
+(defface doom-modeline-evil-operator-state '((t (:inherit doom-modeline-buffer-path)))
+  "Face for the operator state tag in evil state indicator.")
+
+(defface doom-modeline-evil-visual-state '((t (:inherit doom-modeline-buffer-file)))
+  "Face for the visual state tag in evil state indicator.")
+
+(defface doom-modeline-evil-replace-state '((t (:inherit doom-modeline-buffer-modified)))
+  "Face for the replace state tag in evil state indicator.")
+
+(defface doom-modeline-persp-name '((t (:inherit font-lock-comment-face :italic t)))
+  "Face for the replace state tag in evil state indicator.")
+
+(defface doom-modeline-persp-buffer-not-in-persp '((t (:inherit font-lock-doc-face :bold t)))
+  "Face for the replace state tag in evil state indicator.")
+
+;;
+;; Externals
+;;
+
+(declare-function face-remap-remove-relative 'face-remap)
+(declare-function project-current 'project)
+(declare-function project-roots 'project)
+(declare-function projectile-project-root 'projectile)
+
+
+;;
+;; Modeline library
+;;
+
+(eval-and-compile
+  (defvar doom-modeline-fn-alist ())
+  (defvar doom-modeline-var-alist ()))
+
+(defmacro doom-modeline-def-segment (name &rest body)
+  "Defines a modeline segment NAME with BODY and byte compiles it."
+  (declare (indent defun) (doc-string 2))
+  (let ((sym (intern (format "doom-modeline-segment--%s" name)))
+        (docstring (if (stringp (car body))
+                       (pop body)
+                     (format "%s modeline segment" name))))
+    (cond ((and (symbolp (car body))
+                (not (cdr body)))
+           (add-to-list 'doom-modeline-var-alist (cons name (car body)))
+           `(add-to-list 'doom-modeline-var-alist (cons ',name ',(car body))))
+          (t
+           (add-to-list 'doom-modeline-fn-alist (cons name sym))
+           `(progn
+              (fset ',sym (lambda () ,docstring ,@body))
+              (add-to-list 'doom-modeline-fn-alist (cons ',name ',sym))
+              ,(unless (bound-and-true-p byte-compile-current-file)
+                 `(let (byte-compile-warnings)
+                    (byte-compile #',sym))))))))
+
+(defun doom-modeline--prepare-segments (segments)
+  "Prepare mode-line `SEGMENTS'."
+  (let (forms it)
+    (dolist (seg segments)
+      (cond ((stringp seg)
+             (push seg forms))
+            ((symbolp seg)
+             (cond ((setq it (cdr (assq seg doom-modeline-fn-alist)))
+                    (push (list :eval (list it)) forms))
+                   ((setq it (cdr (assq seg doom-modeline-var-alist)))
+                    (push it forms))
+                   ((error "%s is not a defined segment" seg))))
+            ((error "%s is not a valid segment" seg))))
+    (nreverse forms)))
+
+(defun doom-modeline-def-modeline (name lhs &optional rhs)
+  "Defines a modeline format and byte-compiles it.
+NAME is a symbol to identify it (used by `doom-modeline' for retrieval).
+LHS and RHS are lists of symbols of modeline segments defined with
+`doom-modeline-def-segment'.
+
+Example:
+  (doom-modeline-def-modeline 'minimal
+     '(bar matches \" \" buffer-info)
+     '(media-info major-mode))
+  (doom-modeline-set-modeline 'minimal t)"
+  (let ((sym (intern (format "doom-modeline-format--%s" name)))
+        (lhs-forms (doom-modeline--prepare-segments lhs))
+        (rhs-forms (doom-modeline--prepare-segments rhs)))
+    (defalias sym
+      (lambda ()
+        (let ((rhs-str (format-mode-line (cons "" rhs-forms))))
+          (list lhs-forms
+                (propertize
+                 " " 'display
+                 `((space :align-to (- (+ right right-fringe right-margin)
+                                       ,(+ 1 (string-width rhs-str))))))
+                rhs-str)))
+      (concat "Modeline:\n"
+              (format "  %s\n  %s"
+                      (prin1-to-string lhs)
+                      (prin1-to-string rhs))))))
+(put 'doom-modeline-def-modeline 'lisp-indent-function 'defun)
+
+(defun doom-modeline (key)
+  "Return a mode-line configuration associated with KEY (a symbol).
+Throws an error if it doesn't exist."
+  (let ((fn (intern-soft (format "doom-modeline-format--%s" key))))
+    (when (functionp fn)
+      `(:eval (,fn)))))
+
+(defun doom-modeline-set-modeline (key &optional default)
+  "Set the modeline format. Does nothing if the modeline KEY doesn't exist.
+If DEFAULT is non-nil, set the default mode-line for all buffers."
+  (when-let ((modeline (doom-modeline key)))
+    (setf (if default
+              (default-value 'mode-line-format)
+            (buffer-local-value 'mode-line-format (current-buffer)))
+          (list "%e" modeline))))
+
+
+;;
+;; Plugins
+;;
+
+(defun doom-modeline-eldoc (text)
+  "Get eldoc TEXT for mode-line."
+  (concat (doom-modeline--make-xpm 'doom-modeline-eldoc-bar
+                                   doom-modeline-bar-width
+                                   doom-modeline-height)
+          " "
+          text))
+
+;; Show eldoc in the mode-line with `eval-expression'
+(defun doom-modeline--show-eldoc (input)
+  "Display string INPUT in the mode-line next to minibuffer."
+  (with-current-buffer (eldoc-current-buffer)
+    (let* ((str              (and (stringp input) input))
+           (mode-line-format (or (and str (or (doom-modeline-eldoc str) str))
+                                 mode-line-format))
+           mode-line-in-non-selected-windows)
+      (force-mode-line-update)
+      (sit-for eldoc-show-in-mode-line-delay))))
+(setq eldoc-in-minibuffer-show-fn #'doom-modeline--show-eldoc)
+
+(eldoc-in-minibuffer-mode 1)
+
+;; Keep `doom-modeline-current-window' up-to-date
+(defvar doom-modeline-current-window (frame-selected-window))
+(defun doom-modeline-set-selected-window (&rest _)
+  "Set `doom-modeline-current-window' appropriately."
+  (when-let ((win (frame-selected-window)))
+    (unless (minibuffer-window-active-p win)
+      (setq doom-modeline-current-window win)
+      (force-mode-line-update))))
+
+(defun doom-modeline-unset-selected-window ()
+  "Unset `doom-modeline-current-window' appropriately."
+  (setq doom-modeline-current-window nil)
+  (force-mode-line-update))
+
+(add-hook 'window-configuration-change-hook #'doom-modeline-set-selected-window)
+(advice-add #'handle-switch-frame :after #'doom-modeline-set-selected-window)
+(advice-add #'select-window :after #'doom-modeline-set-selected-window)
+(advice-add #'make-frame :after #'doom-modeline-set-selected-window)
+(advice-add #'delete-frame :after #'doom-modeline-set-selected-window)
+(with-no-warnings
+  (cond ((not (boundp 'after-focus-change-function))
+         (add-hook 'focus-in-hook  #'doom-modeline-set-selected-window)
+         (add-hook 'focus-out-hook #'doom-modeline-unset-selected-window))
+        ((defun doom-modeline-refresh-frame ()
+           (setq doom-modeline-current-window nil)
+           (cl-loop for frame in (frame-list)
+                    if (eq (frame-focus-state frame) t)
+                    return (setq doom-modeline-current-window (frame-selected-window frame)))
+           (force-mode-line-update))
+         (add-function :after after-focus-change-function #'doom-modeline-refresh-frame))))
+
+;; Ensure modeline is inactive when Emacs is unfocused (and active otherwise)
+(defvar doom-modeline-remap-face-cookie nil)
+(defun doom-modeline-focus ()
+  "Focus mode-line."
+  (when doom-modeline-remap-face-cookie
+    (require 'face-remap)
+    (face-remap-remove-relative doom-modeline-remap-face-cookie)))
+(defun doom-modeline-unfocus ()
+  "Unfocus mode-line."
+  (setq doom-modeline-remap-face-cookie (face-remap-add-relative 'mode-line 'mode-line-inactive)))
+
+(with-no-warnings
+  (if (boundp 'after-focus-change-function)
+      (progn
+        (defun doom-modeline-focus-change ()
+          (if (frame-focus-state)
+              (doom-modeline-focus)
+            (doom-modeline-unfocus)))
+        (add-function :after after-focus-change-function #'doom-modeline-focus-change))
+    (progn
+      (add-hook 'focus-in-hook #'doom-modeline-focus)
+      (add-hook 'focus-out-hook #'doom-modeline-unfocus))))
+
+
+;;
+;; Modeline helpers
+;;
+
+(defvar doom-modeline-vspc
+  (propertize " " 'face 'variable-pitch)
+  "Text style with icons in mode-line.")
+
+(defun doom-modeline-icon-octicon (&rest args)
+  "Display octicon via ARGS."
+  (when doom-modeline-icon
+    (apply #'all-the-icons-octicon args)))
+
+(defun doom-modeline-icon-faicon (&rest args)
+  "Display font awesome icon via ARGS."
+  (when doom-modeline-icon
+    (apply #'all-the-icons-faicon args)))
+
+(defun doom-modeline-icon-material (&rest args)
+  "Display material icon via ARGS."
+  (when doom-modeline-icon
+    (apply #'all-the-icons-material args)))
+
+(defun doom-modeline-icon-for-mode (&rest args)
+  "Display icon for major mode via ARGS."
+  (when doom-modeline-icon
+    (apply #'all-the-icons-icon-for-mode args)))
+
+(defun doom-modeline-icon-for-file (&rest args)
+  "Display icon for major mode via ARGS."
+  (when doom-modeline-icon
+    (apply #'all-the-icons-icon-for-file args)))
+
+(defun doom-modeline-icon-height (height)
+  "Calculate the actual HEIGHT of the icon."
+  (* (/ height 1.2) all-the-icons-scale-factor))
+
+(defun doom-modeline--active ()
+  "Whether is an active window."
+  (eq (selected-window) doom-modeline-current-window))
+
+(defvar-local doom-modeline-project-root nil)
+(defun doom-modeline-project-root ()
+  "Get the path to the root of your project.
+
+  Return `default-directory' if no project was found."
+  (or doom-modeline-project-root
+      (setq doom-modeline-project-root
+            (file-local-name
+             (or
+              (when (featurep 'projectile)
+                (ignore-errors (projectile-project-root)))
+              (when (featurep 'project)
+                (ignore-errors
+                  (when-let ((project (project-current)))
+                    (expand-file-name (car (project-roots project))))))
+              default-directory)))))
+
+(defun doom-modeline--make-xpm (face width height)
+  "Create an XPM bitmap via FACE, WIDTH and HEIGHT. Inspired by `powerline''s `pl/make-xpm'."
+  (propertize
+   " " 'display
+   (let ((data (make-list height (make-list width 1)))
+         (color (or (face-background face nil t) "None")))
+     (ignore-errors
+       (create-image
+        (concat
+         (format "/* XPM */\nstatic char * percent[] = {\n\"%i %i 2 1\",\n\". c %s\",\n\"  c %s\","
+                 (length (car data))
+                 (length data)
+                 color
+                 color)
+         (apply #'concat
+                (cl-loop with idx = 0
+                         with len = (length data)
+                         for dl in data
+                         do (cl-incf idx)
+                         collect
+                         (concat "\""
+                                 (cl-loop for d in dl
+                                          if (= d 0) collect (string-to-char " ")
+                                          else collect (string-to-char "."))
+                                 (if (eq idx len) "\"};" "\",\n")))))
+        'xpm t :ascent 'center)))))
+
+(defun doom-modeline-buffer-file-name ()
+  "Propertized variable `buffer-file-name' based on `doom-modeline-buffer-file-name-style'."
+  (let* ((buffer-file-name (file-local-name (or (buffer-file-name (buffer-base-buffer)) "")))
+         (buffer-file-truename (file-local-name (or buffer-file-truename (file-truename buffer-file-name) ""))))
+    (propertize
+     (pcase doom-modeline-buffer-file-name-style
+       (`truncate-upto-project
+        (doom-modeline--buffer-file-name buffer-file-name buffer-file-truename 'shrink))
+       (`truncate-from-project
+        (doom-modeline--buffer-file-name buffer-file-name buffer-file-truename nil 'shrink))
+       (`truncate-with-project
+        (doom-modeline--buffer-file-name buffer-file-name buffer-file-truename 'shrink 'shink 'hide))
+       (`truncate-except-project
+        (doom-modeline--buffer-file-name buffer-file-name buffer-file-truename 'shrink 'shink))
+       (`truncate-upto-root
+        (doom-modeline--buffer-file-name-truncate buffer-file-name buffer-file-truename))
+       (`truncate-all
+        (doom-modeline--buffer-file-name-truncate buffer-file-name buffer-file-truename t))
+       (`relative-to-project
+        (doom-modeline--buffer-file-name-relative buffer-file-name buffer-file-truename))
+       (`relative-from-project
+        (doom-modeline--buffer-file-name-relative buffer-file-name buffer-file-truename 'include-project))
+       (style
+        (propertize
+         (pcase style
+           (`file-name (file-name-nondirectory buffer-file-name))
+           (`buffer-name (buffer-name)))
+         'face
+         (let ((face (or (and (buffer-modified-p)
+                              'doom-modeline-buffer-modified)
+                         (and (doom-modeline--active)
+                              'doom-modeline-buffer-file))))
+           (when face `(:inherit ,face))))))
+     'help-echo (concat buffer-file-truename
+                        (unless (string= (file-name-nondirectory buffer-file-truename)
+                                         (buffer-name))
+                          (concat "\n" (buffer-name)))
+                        "\nmouse-1: Previous buffer\nmouse-3: Next buffer")
+     'local-map mode-line-buffer-identification-keymap)))
+
+(defun doom-modeline--buffer-file-name-truncate (file-path true-file-path &optional truncate-tail)
+  "Propertized variable `buffer-file-name' that truncates every dir along path.
+If TRUNCATE-TAIL is t also truncate the parent directory of the file."
+  (let ((dirs (shrink-path-prompt (file-name-directory true-file-path)))
+        (active (doom-modeline--active)))
+    (if (null dirs)
+        (propertize "%b" 'face (if active 'doom-modeline-buffer-file))
+      (let ((modified-faces (if (buffer-modified-p) 'doom-modeline-buffer-modified)))
+        (let ((dirname (car dirs))
+              (basename (cdr dirs))
+              (dir-faces (or modified-faces (if active 'doom-modeline-project-root-dir)))
+              (file-faces (or modified-faces (if active 'doom-modeline-buffer-file))))
+          (concat (propertize (concat dirname
+                                      (if truncate-tail (substring basename 0 1) basename)
+                                      "/")
+                              'face (if dir-faces `(:inherit ,dir-faces)))
+                  (propertize (file-name-nondirectory file-path)
+                              'face (if file-faces `(:inherit ,file-faces)))))))))
+
+(defun doom-modeline--buffer-file-name-relative (_file-path true-file-path &optional include-project)
+  "Propertized variable `buffer-file-name' showing directories relative to project's root only."
+  (let ((root (doom-modeline-project-root))
+        (active (doom-modeline--active)))
+    (if (null root)
+        (propertize "%b" 'face (if active 'doom-modeline-buffer-file))
+      (let* ((modified-faces (if (buffer-modified-p) 'doom-modeline-buffer-modified))
+             (relative-dirs (file-relative-name (file-name-directory true-file-path)
+                                                (if include-project (concat root "../") root)))
+             (relative-faces (or modified-faces (if active 'doom-modeline-buffer-path)))
+             (file-faces (or modified-faces (if active 'doom-modeline-buffer-file))))
+        (if (equal "./" relative-dirs) (setq relative-dirs ""))
+        (concat (propertize relative-dirs 'face (if relative-faces `(:inherit ,relative-faces)))
+                (propertize (file-name-nondirectory true-file-path)
+                            'face (if file-faces `(:inherit ,file-faces))))))))
+
+(defun doom-modeline--buffer-file-name (file-path _true-file-path &optional truncate-project-root-parent truncate-project-relative-path hide-project-root-parent)
+  "Propertized variable `buffer-file-name' given by FILE-PATH.
+If TRUNCATE-PROJECT-ROOT-PARENT is non-nil will be saved by truncating project
+root parent down fish-shell style.
+
+Example:
+  ~/Projects/FOSS/emacs/lisp/comint.el => ~/P/F/emacs/lisp/comint.el
+
+If TRUNCATE-PROJECT-RELATIVE-PATH is non-nil will be saved by truncating project
+relative path down fish-shell style.
+
+Example:
+  ~/Projects/FOSS/emacs/lisp/comint.el => ~/Projects/FOSS/emacs/l/comint.el
+
+If HIDE-PROJECT-ROOT-PARENT is non-nil will hide project root parent.
+
+Example:
+  ~/Projects/FOSS/emacs/lisp/comint.el => emacs/lisp/comint.el"
+  (let ((project-root (doom-modeline-project-root))
+        (active (doom-modeline--active))
+        (modified-faces (if (buffer-modified-p) 'doom-modeline-buffer-modified)))
+    (let ((sp-faces       (or modified-faces (if active 'font-lock-comment-face)))
+          (project-faces  (or modified-faces (if active 'font-lock-string-face)))
+          (relative-faces (or modified-faces (if active 'doom-modeline-buffer-path)))
+          (file-faces     (or modified-faces (if active 'doom-modeline-buffer-file))))
+      (let ((sp-props       `(,@(if sp-faces       `(:inherit ,sp-faces))      ,@(if active '(:weight bold))))
+            (project-props  `(,@(if project-faces  `(:inherit ,project-faces)) ,@(if active '(:weight bold))))
+            (relative-props `(,@(if relative-faces `(:inherit ,relative-faces))))
+            (file-props     `(,@(if file-faces     `(:inherit ,file-faces)))))
+        (concat
+         ;; project root parent
+         (unless hide-project-root-parent
+           (when-let (root-path-parent
+                      (file-name-directory (directory-file-name project-root)))
+             (propertize
+              (if (and truncate-project-root-parent
+                       (not (string-empty-p root-path-parent))
+                       (not (string= root-path-parent "/")))
+                  (shrink-path--dirs-internal root-path-parent t)
+                (abbreviate-file-name root-path-parent))
+              'face sp-props)))
+         ;; project
+         (propertize
+          (concat (file-name-nondirectory (directory-file-name project-root)) "/")
+          'face project-props)
+         ;; relative path
+         (propertize
+          (when-let (relative-path (file-relative-name
+                                    (or (file-name-directory file-path) "./")
+                                    project-root))
+            (if (string= relative-path "./")
+                ""
+              (if truncate-project-relative-path
+                  (substring (shrink-path--dirs-internal relative-path t) 1)
+                relative-path)))
+          'face relative-props)
+         ;; file name
+         (propertize (file-name-nondirectory file-path) 'face file-props))))))
+
+(provide 'doom-modeline-core)
+
+;;; doom-modeline-core.el ends here

doom-modeline-env.el

@@ -28,6 +28,70 @@
 ;;; Code:
 
 (require 'subr-x)
+(require 'doom-modeline-core)
+
+;; Show version string for multi-version managers like rvm, rbenv, pyenv, etc.
+(defvar-local doom-modeline-env-version nil
+  "The version to display with major-mode in mode-line.
+Example: \"2.6.0\"")
+(defvar-local doom-modeline-env-command nil
+  "A program that we're looking to extract version information from.
+Example: \"ruby\"")
+(defvar-local doom-modeline-env-command-args nil
+  "A list of arguments to pass to `doom-modeline-env-command` to extract the version from.
+Example: '(\"--version\") ")
+(defvar-local doom-modeline-env-parser nil
+  "A function that returns version number from a programs --version (or similar) command.
+Example: 'doom-modeline-env--ruby")
+
+(defun doom-modeline-update-env ()
+  "Update environment info on mode-line."
+  (when (and doom-modeline-version
+             doom-modeline-env-command
+             (executable-find doom-modeline-env-command)
+             doom-modeline-env-command-args
+             doom-modeline-env-parser)
+    (let ((default-directory (doom-modeline-project-root)))
+      (doom-modeline-env--get doom-modeline-env-command
+                              doom-modeline-env-command-args
+                              (lambda (prog-version)
+                                (setq doom-modeline-env-version
+                                      (funcall doom-modeline-env-parser prog-version)))))))
+
+(add-hook 'find-file-hook #'doom-modeline-update-env)
+(with-no-warnings
+  (if (boundp 'after-focus-change-function)
+      (add-function :after after-focus-change-function
+                    (lambda ()
+                      (if (frame-focus-state)
+                          (doom-modeline-update-env))))
+    (add-hook 'focus-in-hook #'doom-modeline-update-env)))
+
+(defun doom-modeline-env--get (prog args callback)
+  "Start a sub process using PROG and apply the ARGS to the sub process.
+Once it recieves information from STDOUT, it closes off the subprocess and
+passes on the information into the CALLBACK.
+Example:
+  (doom-modeline-env--get
+     \"ruby\"
+     '(\"--version\")
+     (lambda (line)
+        (message (doom-modeline-parser--ruby line)))"
+  (let ((proc (apply 'start-process
+                     ;; Flaten process-args into a single list so we can handle
+                     ;; variadic length args
+                     (append
+                      (list "doom-modeline-env" nil prog)
+                      args)))
+        (parser callback))
+    (set-process-filter proc
+                        (lambda (_proc line)
+                          (ignore-errors
+                            (funcall parser line))))))
+
+;;
+;; Parser
+;;
 
 (defun doom-modeline-env--ruby (line)
   "Parse Ruby version from LINE."
@@ -75,25 +139,49 @@
   (cadr
    (split-string line)))
 
-(defun doom-modeline-env--get (prog args callback)
-  "Start a sub process using PROG and apply the ARGS to the sub process.
-Once it recieves information from STDOUT, it closes off the subprocess and
-passes on the information into the CALLBACK.
-Example:
-  (doom-modeline-env--get
-     \"ruby\"
-     '(\"--version\")
-     (lambda (line)
-        (message (doom-modeline-parser--ruby line)))"
-  (let ((proc (apply 'start-process
-                     (append ;; Flaten process-args into a single list so we can handle variadic length args
-                      (list "doom-modeline-env" nil prog)
-                      args)))
-        (parser callback))
-    (set-process-filter proc
-                        (lambda (_proc line)
-                          (ignore-errors
-                            (funcall parser line))))))
+
+;;
+;; Bootstrap
+;; Versions, support Python, Ruby, Perl and Golang, etc.
+;;
+
+(add-hook 'python-mode-hook
+          (lambda ()
+            (cond ((and (fboundp 'pipenv-project-p) (pipenv-project-p) (executable-find "pipenv"))
+                   (setq doom-modeline-env-parser 'doom-modeline-env--python)
+                   (setq doom-modeline-env-command "pipenv")
+                   (setq doom-modeline-env-command-args '("run" "python" "--version")))
+                  ((and doom-modeline-python-executable
+                        (executable-find doom-modeline-python-executable))
+                   (setq doom-modeline-env-parser 'doom-modeline-env--python)
+                   (setq doom-modeline-env-command doom-modeline-python-executable)
+                   (setq doom-modeline-env-command-args '("--version"))))))
+(add-hook 'ruby-mode-hook
+          (lambda ()
+            (setq doom-modeline-env-command "ruby")
+            (setq doom-modeline-env-command-args '("--version"))
+            (setq doom-modeline-env-parser 'doom-modeline-env--ruby)))
+(add-hook 'perl-mode-hook
+          (lambda ()
+            (setq doom-modeline-env-command "perl")
+            (setq doom-modeline-env-command-args '("--version"))
+            (setq doom-modeline-env-parser 'doom-modeline-env--perl)))
+(add-hook 'go-mode-hook
+          (lambda ()
+            (setq doom-modeline-env-command "go")
+            (setq doom-modeline-env-command-args '("version"))
+            (setq doom-modeline-env-parser 'doom-modeline-env--go)))
+
+(add-hook 'elixir-mode-hook
+          (lambda ()
+            (setq doom-modeline-env-command "iex")
+            (setq doom-modeline-env-command-args '("--version"))
+            (setq doom-modeline-env-parser 'doom-modeline-env--elixir)))
+(add-hook 'rust-mode-hook
+          (lambda ()
+            (setq doom-modeline-env-command "rustc")
+            (setq doom-modeline-env-command-args '("--version"))
+            (setq doom-modeline-env-parser 'doom-modeline-env--rustc)))
 
 (provide 'doom-modeline-env)
 

test/doom-modeline-core-test.el

@@ -1,4 +1,4 @@
-;;; doom-modeline-test.el --- Unit tests for doom-modeline -*- lexical-binding: t; -*-
+;;; doom-modeline-core-test.el --- Unit tests for doom-modeline -*- lexical-binding: t; -*-
 
 ;; Copyright (C) 2018-2019 Vincent Zhang
 
@@ -31,7 +31,7 @@
 
 ;;; Code:
 
-(require 'doom-modeline)
+(require 'doom-modeline-core)
 
 (ert-deftest doom-modeline--buffer-file-name/truncate-upto-project ()
   (let ((default-directory "/home/user/project/")
@@ -107,4 +107,4 @@
                  (doom-modeline--buffer-file-name-relative file-path true-file-path 'include-project))
                 "project/relative/test.txt")))))
 
-;;; doom-modeline-test.el ends here
+;;; doom-modeline-core-test.el ends here