Fix error when directory /sys is not readable by the user

Update recipes for installing package

Add MELPA badge

README.org

@@ -1,6 +1,9 @@
 #+title: eshell-info-banner.el
 #+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,
 akin to ~fish_greeting~ but for Eshell. But an image is worth a thousand
@@ -60,12 +63,12 @@ your ~load-path~ and add the following to your ~.emacs~ or your ~init.el~:
   (add-hook 'eshell-banner-load-hook 'eshell-info-banner-update-banner)
 #+end_src
 
-If you use ~use-package~ only, you can then install it like so:
+If you use ~use-package~ only and install the package from MELPA, you
+can then install it like so:
 #+begin_src emacs-lisp
   (use-package eshell-info-banner
     :ensure t
     :defer t
-    :load-path "~/path/to/where/you/cloned/it/eshell-info-banner.el/"
     :hook (eshell-banner-load . eshell-info-banner-update-banner))
 #+end_src
 
@@ -74,23 +77,17 @@ In my case, I prefer using ~use-package~ with ~straight~:
   (use-package eshell-info-banner
     :ensure t
     :defer t
-    :straight (eshell-info-banner :type git
+    :straight (:build t)
-                                  :host github
-                                  :repo "phundrak/eshell-info-banner.el")
     :hook (eshell-banner-load . eshell-info-banner-update-banner))
 #+end_src
 
-I personally also added ~:build t~ in the straight recipe to ensure
+You can just use ~:straight t~ if you do not want to ensure the package
-Emacs compiles my package, both to ~.elc~ and ~.eln~ files (I am on Emacs
+gets compiled by Emacs.
-28.0, ~feature/native-comp~ got merged into ~master~!)
 
 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~:
@@ -181,4 +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: 0.7.1
+;; Version: 0.7.6
 ;; 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
 
@@ -82,7 +82,9 @@
       ("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."))
 
 
@@ -301,17 +303,18 @@ 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")
+  (let ((partitions (cdr (split-string (eshell-info-banner--shell-command-to-string "df -lH")
                                        (regexp-quote "\n")
-                                  t)))
+                                       t))))
-    (seq-filter (lambda (partition)
+    (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)))
-                    (unless (seq-some (lambda (prefix)
+                              (when (seq-some (lambda (prefix)
                                                 (string-prefix-p prefix filesystem t))
                                               eshell-info-banner-partition-prefixes)
                                 (make-eshell-info-banner--mounted-partitions
@@ -322,7 +325,7 @@ MOUNT-POSITION."
                                  :used used
                                  :percent (string-to-number
                                            (string-trim-left percent (regexp-quote "%")))))))
-           partitions)))
+                          partitions))))
 
 (defun eshell-info-banner--get-mounted-partitions-gnu ()
   "Detect mounted partitions on a Linux system.
@@ -402,7 +405,7 @@ For TEXT-PADDING and BAR-LENGTH, see the documentation of
                                         ; Memory ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 (defun eshell-info-banner--get-memory-gnu ()
   "Get memory usage for GNU/Linux and Hurd."
-  (seq-do (lambda (line)
+  (mapcar (lambda (line)
             (let* ((line (split-string line " " t)))
               (list (s-chop-suffix ":" (nth 0 line))   ; name
                     (string-to-number (nth 1 line))    ; total
@@ -549,8 +552,9 @@ 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)))
+  (let ((battery-level (when (file-readable-p "/sys/") (battery))))
-    (if (or (string= battery-level "Battery status not available")
+    (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
@@ -624,6 +628,20 @@ 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
+        ;; 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
+        ((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))))))
         ((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)