Fix extra argument for executable-find with older versions of Emacs

Update recipes for installing package

Add MELPA badge

README.org

@@ -2,6 +2,7 @@
 #+author: Lucien Cartier-Tilet
 #+email: lucien@phundrak.com
 [[https://melpa.org/#/eshell-info-banner][file:https://melpa.org/packages/eshell-info-banner-badge.svg]]
+[[https://stable.melpa.org/#/eshell-info-banner][file:https://stable.melpa.org/packages/eshell-info-banner-badge.svg]]
 
 * Introduction
 ~eshell-info-banner.el~ is a utility for creating an informative banner,
@@ -87,9 +88,6 @@ There is probably a similar way to install it with pure ~straight.el~ or
 ~quelpa~, but I’m not knowledgable enough for that, feel free to create
 a PR to add some more installation instructions!
 
-There is currently no plans of making this package available on MELPA
-or non-gnu elpa.
-
 * Customizing
 A couple of variables can be edited by the user in order to configure
 ~eshell-info-banner.el~:
@@ -180,4 +178,4 @@ See [[file:CONTRIBUTING.org]].
 
 * License
 ~eshell-info-banner.el~ is available under the GNU GPL-3.0 license. You
-can find the full text in [[file:LICENSE.md][LICENSE.md]].
+can find the full text in the [[file:LICENSE][LICENSE]] file.

eshell-info-banner.el

@@ -2,9 +2,9 @@
 
 ;; Author: Lucien Cartier-Tilet <lucien@phundrak.com>
 ;; Maintainer: Lucien Cartier-Tilet <lucien@phundrak.com>
-;; Version: 0.7.2
+;; Version: 0.7.7
 ;; Package-Requires: ((emacs "25.1") (f "0.20") (s "1"))
-;; Homepage: https://labs.phundrak.com/phundrak/eshell-info-banner.el
+;; Homepage: https://github.com/Phundrak/eshell-info-banner.el
 
 ;; This file is not part of GNU Emacs
 
@@ -82,9 +82,34 @@
       ("11.1"  . "macOS Big Sur")
       ("11.2"  . "macOS Big Sur")
       ("11.3"  . "macOS Big Sur")
-      ("11.4"  . "macOS Big Sur"))
+      ("11.4"  . "macOS Big Sur")
+      ("11.5"  . "macOS Big Sur")
+      ("11.6"  . "macOS Big Sur"))
     "Versions of OSX and macOS and their name."))
 
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+                                        ;                Macros               ;
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+(defmacro eshell-info-banner--with-face (str &rest properties)
+  "Helper macro for applying face `PROPERTIES' to `STR'."
+  `(propertize ,str 'face (list ,@properties)))
+
+(defun eshell-info-banner--executable-find (program &optional remote)
+  (if (version< emacs-version "27.1")
+      (let ((default-directory (if (and eshell-info-banner-tramp-aware
+                                        remote)
+                                   default-directory
+                                 "~")))
+        (executable-find program))
+    (executable-find program remote)))
+
+(defun eshell-info-banner--shell-command-to-string (command)
+  "Execute shell command COMMAND and return its output as a string.
+Ensures the command is ran with LANG=C."
+  (shell-command-to-string (format "LANG=C %s" command)))
+
 
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
                                         ;           Custom variables          ;
@@ -145,9 +170,10 @@
   :safe #'stringp
   :version "0.5.0")
 
-(defcustom eshell-info-banner-use-duf (if (executable-find eshell-info-banner-duf-executable)
-                                          t
-                                        nil)
+(defcustom eshell-info-banner-use-duf
+  (if (eshell-info-banner--executable-find eshell-info-banner-duf-executable)
+      t
+    nil)
   "If non-nil, use `duf' instead of `df'."
   :group 'eshell-info-banner
   :type 'boolean
@@ -179,20 +205,6 @@
   "Face for `eshell-info-banner' progress bars displaying critical levels."
   :group 'eshell-info-banner)
 
-
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-                                        ;                Macros               ;
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-
-(defmacro eshell-info-banner--with-face (str &rest properties)
-  "Helper macro for applying face `PROPERTIES' to `STR'."
-  `(propertize ,str 'face (list ,@properties)))
-
-(defun eshell-info-banner--shell-command-to-string (command)
-  "Execute shell command COMMAND and return its output as a string.
-Ensures the command is ran with LANG=C."
-  (shell-command-to-string (format "LANG=C %s" command)))
-
 
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
                                         ;          Internal functions         ;
@@ -204,7 +216,7 @@ Ensures the command is ran with LANG=C."
   "Get uptime of machine if `uptime' is available.
 
 If the executable `uptime' is not found, return nil."
-  (when (executable-find "uptime")
+  (when (eshell-info-banner--executable-find "uptime")
     (let ((uptime-str (eshell-info-banner--shell-command-to-string "uptime -p")))
       (if (not (seq-some (lambda (keyword)
                            (string-match-p keyword uptime-str))
@@ -301,28 +313,29 @@ Common function between
 otherwise differ solely on the position of the mount point in the
 partition list. Its position is given by the argument
 MOUNT-POSITION."
-  (let ((partitions (split-string (eshell-info-banner--shell-command-to-string "df -lH")
-                                  (regexp-quote "\n")
-                                  t)))
-    (seq-filter (lambda (partition)
-                  (let* ((partition  (split-string partition " " t))
-                         (filesystem (nth 0 partition))
-                         (size       (nth 1 partition))
-                         (used       (nth 2 partition))
-                         (percent    (nth 4 partition))
-                         (mount      (nth mount-position partition)))
-                    (unless (seq-some (lambda (prefix)
-                                        (string-prefix-p prefix filesystem t))
-                                      eshell-info-banner-partition-prefixes)
-                      (make-eshell-info-banner--mounted-partitions
-                       :path (if (> (length mount) eshell-info-banner-shorten-path-from)
-                                 (eshell-info-banner--abbr-path mount t)
-                               mount)
-                       :size size
-                       :used used
-                       :percent (string-to-number
-                                 (string-trim-left percent (regexp-quote "%")))))))
-           partitions)))
+  (let ((partitions (cdr (split-string (eshell-info-banner--shell-command-to-string "df -lH")
+                                       (regexp-quote "\n")
+                                       t))))
+    (cl-remove-if #'null
+                  (mapcar (lambda (partition)
+                            (let* ((partition  (split-string partition " " t))
+                                   (filesystem (nth 0 partition))
+                                   (size       (nth 1 partition))
+                                   (used       (nth 2 partition))
+                                   (percent    (nth 4 partition))
+                                   (mount      (nth mount-position partition)))
+                              (when (seq-some (lambda (prefix)
+                                                (string-prefix-p prefix filesystem t))
+                                              eshell-info-banner-partition-prefixes)
+                                (make-eshell-info-banner--mounted-partitions
+                                 :path (if (> (length mount) eshell-info-banner-shorten-path-from)
+                                           (eshell-info-banner--abbr-path mount t)
+                                         mount)
+                                 :size size
+                                 :used used
+                                 :percent (string-to-number
+                                           (string-trim-left percent (regexp-quote "%")))))))
+                          partitions))))
 
 (defun eshell-info-banner--get-mounted-partitions-gnu ()
   "Detect mounted partitions on a Linux system.
@@ -549,8 +562,9 @@ The usage of `eshell-info-banner-warning-percentage' and
 thought of as the “percentage of discharge” of the computer.
 Thus, setting the warning at 75% will be translated as showing
 the warning face with a battery level of 25% or less."
-  (let ((battery-level (battery)))
-    (if (or (string= battery-level "Battery status not available")
+  (let ((battery-level (when (file-readable-p "/sys/") (battery))))
+    (if (or (null battery-level)
+            (string= battery-level "Battery status not available")
             (string-match-p (regexp-quote "N/A") battery-level))
         ""
       (let ((percentage (save-match-data
@@ -624,13 +638,27 @@ If RELEASE-FILE is nil, use '/etc/os-release'."
   "See `eshell-info-banner--get-os-information'."
   (let ((prefix (if eshell-info-banner-tramp-aware (file-remote-p default-directory) "")))
     `(,(cond
-        ((executable-find "hostnamectl" eshell-info-banner-tramp-aware)
+        ;; Bedrock Linux
+        ((file-exists-p (concat prefix "/bedrock/etc/bedrock-release"))
+         (s-trim (with-temp-buffer
+                   (insert-file-contents (concat prefix "/bedrock/etc/bedrock-release"))
+                   (buffer-string))))
+        ;; Proxmox
+        ((eshell-info-banner--executable-find "pveversion" eshell-info-banner-tramp-aware)
+         (let ((distro (eshell-info-banner--shell-command-to-string "pveversion")))
+           (save-match-data
+             (string-match "/\\([^/]+\\)/" distro)
+             (concat "Proxmox "
+                     (substring-no-properties distro
+                                              (match-beginning 1)
+                                              (match-end 1))))))
+        ((eshell-info-banner--executable-find "hostnamectl" eshell-info-banner-tramp-aware)
          (eshell-info-banner--get-os-information-from-hostnamectl))
-        ((executable-find "lsb_release" eshell-info-banner-tramp-aware)
+        ((eshell-info-banner--executable-find "lsb_release" eshell-info-banner-tramp-aware)
          (eshell-info-banner--get-os-information-from-lsb-release))
         ((file-exists-p (concat prefix "/etc/os-release"))
          (eshell-info-banner--get-os-information-from-release-file))
-        ((executable-find "shepherd")
+        ((eshell-info-banner--executable-find "shepherd")
          (let ((distro (car (s-lines (eshell-info-banner--shell-command-to-string "guix -V")))))
            (save-match-data
              (string-match "\\([0-9\\.]+\\)" distro)
@@ -643,6 +671,10 @@ If RELEASE-FILE is nil, use '/etc/os-release'."
            (s-trim (with-temp-buffer
                      (process-file "uname" nil t nil "-s")
                      (buffer-string)))))
+        ((and (file-exists-p (concat prefix "/system/app"))
+              (file-exists-p (concat prefix "/system/priv-app")))
+         (concat "Android "
+                 (s-trim (eshell-info-banner--shell-command-to-string "getprop ro.build.version.release"))))
         (t "Unknown"))
       .
       ,(s-trim (eshell-info-banner--shell-command-to-string "uname -rs")))))