Make eshell-info-banner more portable
Memory detection and partition detection now relies of the operating system detection of Emacs to know whether it can run or not. Also, this is cleaning up a lot the function `eshell-info-banner', and I think I will continue cleaning it up even more in the future.
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@ -2,7 +2,7 @@
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;; Author: Lucien Cartier-Tilet <lucien@phundrak.com>
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;; Maintainer: Lucien Cartier-Tilet <lucien@phundrak.com>
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;; Version: 0.3.0
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;; Version: 0.4.0
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;; Package-Requires: ((emacs "24") (dash "2") (f "0.20") (s "1"))
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;; Homepage: https://labs.phundrak.com/phundrak/eshell-info-banner.el
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@ -152,6 +152,15 @@
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"Object representing a mounted partition found in the system."
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path size used percent)
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(defun eshell-info-banner--get-longest-path (partitions)
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"Return the length of the longest partition path in `PARTITIONS'.
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The returned value is in any case greater than `eshell-info-banner--min-length-left'."
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(-reduce-from (lambda (len partition)
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(max len (length (eshell-info-banner--mounted-partitions-path partition))))
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eshell-info-banner--min-length-left
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partitions))
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(defun eshell-info-banner--abbr-path (path &optional abbr)
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"Remove `$HOME' from `PATH', abbreviate parent dirs if `ABBR' non nil.
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@ -182,10 +191,12 @@ neither of these, an error will be thrown by the function."
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(eshell-info-banner--abbr-path (cdr path))))
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(t (error "Invalid argument %s, neither stringp or listp" path))))
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(defun eshell-info-banner--get-mounted-partitions ()
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"Detect mounted partitions on the system.
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(defun eshell-info-banner--get-mounted-partitions/gnu ()
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"Detect mounted partitions on a Linux system.
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Return detected partitions as a list of structs."
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Return detected partitions as a list of structs. See
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`eshell-info-banner-partition-prefixes' to see how partitions are
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chosen."
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(let ((partitions (split-string (shell-command-to-string "LANG=C df -lH") (regexp-quote "\n") t)))
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(-keep (lambda (partition)
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(let* ((partition (split-string partition " " t))
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@ -207,14 +218,167 @@ Return detected partitions as a list of structs."
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(string-trim-left percent (regexp-quote "%")))))))
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partitions)))
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(defun eshell-info-banner--get-longest-path (partitions)
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"Return the length of the longest partition path in `PARTITIONS'.
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(defun eshell-info-banner--get-mounted-partitions/windows ()
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"Detect mounted partitions on a Windows system.
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The returned value is in any case greater than `eshell-info-banner--min-length-left'."
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(-reduce-from (lambda (len partition)
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(max len (length (eshell-info-banner--mounted-partitions-path partition))))
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eshell-info-banner--min-length-left
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partitions))
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Return detected partitions as a list of structs. See
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`eshell-info-banner-partition-prefixes' to see how partitions are
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chosen."
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(progn
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(message "Partition detection for Windows and DOS not yet supported.")
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nil))
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(defun eshell-info-banner--get-mounted-partitions/darwin ()
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"Detect mounted partitions on a Darwin/macOS system.
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Return detected partitions as a list of structs. See
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`eshell-info-banner-partition-prefixes' to see how partitions are
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chosen."
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(progn
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(message "Partition detection for macOS and Darwin-based OSes not yet supported.")
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nil))
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(defun eshell-info-banner--get-mounted-partitions ()
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"Detect mounted partitions on the system.
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Return detected partitions as a list of structs."
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(pcase system-type
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((or 'gnu 'gnu/linux 'gnu/kfreebsd)
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(eshell-info-banner--get-mounted-partitions/gnu))
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((or 'ms-dos 'windows-nt 'cygwin)
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(eshell-info-banner--get-mounted-partitions/windows))
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('darwin
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(eshell-info-banner--get-mounted-partitions/darwin))
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(other
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(progn
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(message "Partition detection for %s not yet supported." other)
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nil))))
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(defun eshell-info-banner--partition-to-string (partition text-padding bar-length)
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"Display a progress bar showing how full a `PARTITION' is.
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For TEXT-PADDING and BAR-LENGTH, see the documentation of
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`eshell-info-banner--display-memory'."
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(let ((percentage (eshell-info-banner--mounted-partitions-percent partition)))
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(concat (s-pad-right text-padding "."
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(eshell-info-banner--with-face (eshell-info-banner--mounted-partitions-path partition)
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:weight 'bold))
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": "
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(eshell-info-banner--progress-bar bar-length percentage)
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(format " %6s / %-5s (%3s%%)"
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(eshell-info-banner--mounted-partitions-used partition)
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(eshell-info-banner--mounted-partitions-size partition)
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(eshell-info-banner--with-face
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(number-to-string percentage)
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:inherit (eshell-info-banner--get-color-percentage percentage))))))
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(defun eshell-info-banner--display-partitions (text-padding bar-length)
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"Display the detected mounted partitions of the system.
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For TEXT-PADDING and BAR-LENGTH, see the documentation of
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`eshell-info-banner--display-memory'."
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(mapconcat (lambda (partition)
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(eshell-info-banner--partition-to-string partition text-padding bar-length))
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(eshell-info-banner--get-mounted-partitions)
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"\n"))
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; Memory ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(defun eshell-info-banner--get-memory/linux ()
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"Get memory usage for GNU/Linux and Hurd."
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(-map (lambda (line)
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(let* ((line (split-string line " " t)))
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(list (s-chop-suffix ":" (nth 0 line)) ; name
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(string-to-number (nth 1 line)) ; total
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(string-to-number (nth 2 line))))) ; used
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(split-string (shell-command-to-string "LANG=C free -b | tail -2")
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"\n"
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t)))
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(defun eshell-info-banner--get-memory/bsd ()
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"Get memory usage for *BSD."
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(message "Memory usage not yet implemented for BSD")
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nil)
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(defun eshell-info-banner--get-memory/darwin ()
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"Get memory usage for macOS and Darwin-based OSes."
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(message "Memory usage not yet implemented for macOS and Darwin-based OSes")
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nil)
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(defun eshell-info-banner--get-memory/windows ()
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"Get memory usage for Window."
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(message "Memory usage not yet implemented for Windows and DOS")
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nil)
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(defun eshell-info-banner--get-memory ()
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"Get memory usage of current operating system.
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Return a list of either one or two elements. The first element
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represents the RAM, the second represents the swap. Both are
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lists and contain three elements: the name of the memory, the
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total amount of memory available, and the amount of used memory,
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in bytes."
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(pcase system-type
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((or 'gnu 'gnu/linux)
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(eshell-info-banner--get-memory/linux))
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('gnu/kfreebsd
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(eshell-info-banner--get-memory/bsd))
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('darwin
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(eshell-info-banner--get-memory/darwin))
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((or 'ms-dos 'windows-nt 'cygwin)
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(eshell-info-banner--get-memory/windows))
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(os (message "Memory usage not yet implemented for %s" os)
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nil)))
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(defun eshell-info-banner--memory-to-string (type total used text-padding bar-length)
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"Display a memory’s usage with a progress bar.
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The `TYPE' of memory will be the text on the far left, while
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`USED' and `TOTAL' will be displayed on the right of the progress
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bar. From them, a percentage will be computed which will be used
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to display a colored percentage of the progress bar and it will
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be displayed on the far right.
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`TEXT-PADDING' will determine how many dots are necessary between
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`TYPE' and the colon.
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`BAR-LENGTH' determines the length of the progress bar to be
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displayed."
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(let ((percentage (if (= used 0)
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0
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(/ (* 100 used) total))))
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(concat (s-pad-right text-padding "." type)
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": "
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(eshell-info-banner--progress-bar bar-length percentage)
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(format " %6s / %-5s (%3s%%)"
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(file-size-human-readable used)
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(file-size-human-readable total)
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(eshell-info-banner--with-face (number-to-string percentage)
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:inherit (eshell-info-banner--get-color-percentage percentage))))))
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(defun eshell-info-banner--display-memory (text-padding bar-length)
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"Display memories detected on your system.
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This function will create a string used by `eshell-info-banner'
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in order to display memories detected by the package, generally
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the Ram at least, sometimes the swap too. Displayed progress
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bars will have this appearance:
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TYPE......: [=========] XXG / XXG (XX%)
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`TEXT-PADDING': the space allocated to the text at the left of the
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progress bar.
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`BAR-LENGTH': the length of the progress bar."
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(mapconcat (lambda (mem)
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(eshell-info-banner--memory-to-string (nth 0 mem) (nth 1 mem)
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(nth 2 mem) text-padding
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bar-length))
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(eshell-info-banner--get-memory)
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"\n"))
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; Display information ;;;;;;;;;;;;;;;;;
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(defun eshell-info-banner--get-color-percentage (percentage)
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"Display a `PERCENTAGE' with its according face."
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@ -253,56 +417,6 @@ critical levels close to 0 rather than 100."
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:inherit 'eshell-info-banner-background-face)
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(eshell-info-banner--with-face "]" :weight 'bold))))
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(defun eshell-info-banner--display-memory (type used total text-padding bar-length)
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"Display a memory’s usage with a progress bar.
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Displayed progress bars will have this appearance:
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TYPE......: [=========] XXG / XXG (XX%)
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The `TYPE' of memory will be the text on the far left, while
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`USED' and `TOTAL' will be displayed on the right of the progress
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bar. From them, a percentage will be computed which will be used
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to display a colored percentage of the progress bar and it will
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be displayed on the far right.
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`TEXT-PADDING' will determine how many dots are necessary between
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`TYPE' and the colon.
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`BAR-LENGTH' determines the length of the progress bar to be
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displayed."
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(let ((percentage (if (= used 0)
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0
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(/ (* 100 used) total))))
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(concat (s-pad-right text-padding "." type)
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": "
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(eshell-info-banner--progress-bar bar-length percentage)
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(format " %6s / %-5s (%3s%%)\n"
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(file-size-human-readable used)
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(file-size-human-readable total)
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(eshell-info-banner--with-face (number-to-string percentage)
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:inherit (eshell-info-banner--get-color-percentage percentage))))))
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(defun eshell-info-banner--display-partition (partition text-padding bar-length)
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"Display a progress bar showing how full a `PARTITION' is.
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`BAR-LENGTH' represents the total length of the progress bar,
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while `TEXT-PADDING' indicates how many dots are to be put
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between the partition’s name and the colon following it.
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See also `eshell-info-banner--display-memory'."
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(let ((percentage (eshell-info-banner--mounted-partitions-percent partition)))
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(concat (s-pad-right text-padding "."
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(eshell-info-banner--with-face (eshell-info-banner--mounted-partitions-path partition)
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:weight 'bold))
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": "
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(eshell-info-banner--progress-bar bar-length percentage)
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(format " %6s / %-5s (%3s%%)"
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(eshell-info-banner--mounted-partitions-used partition)
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(eshell-info-banner--mounted-partitions-size partition)
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(eshell-info-banner--with-face
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(number-to-string percentage)
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:inherit (eshell-info-banner--get-color-percentage percentage))))))
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(defun eshell-info-banner--display-battery (text-padding bar-length)
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"If the computer has a battery, display its level.
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@ -389,7 +503,6 @@ If RELEASE-FILE is nil, use '/etc/os-release'."
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(defun eshell-info-banner ()
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"Banner for Eshell displaying system information."
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(let* ((default-directory (if eshell-info-banner-tramp-aware default-directory "~"))
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(partitions (eshell-info-banner--get-mounted-partitions))
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(os (eshell-info-banner--get-os-information))
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(hostname (if eshell-info-banner-tramp-aware
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(or (file-remote-p default-directory 'host) (system-name))
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@ -409,13 +522,7 @@ If RELEASE-FILE is nil, use '/etc/os-release'."
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(tot-width (max (+ left-length right-text 3)
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eshell-info-banner-width))
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(middle-padding (- tot-width right-text left-padding 4))
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(memory (-map (lambda (line)
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(s-split " " line t))
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(s-split "\n"
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(shell-command-to-string "LANG=C free -b | tail -2")
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t)))
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(ram (nth 0 memory))
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(swap (nth 1 memory))
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(bar-length (- tot-width left-padding 4 22)))
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(concat (format "%s\n" (s-repeat tot-width eshell-info-banner-progress-bar-char))
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(format "%s: %s Kernel.: %s\n"
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@ -429,20 +536,9 @@ If RELEASE-FILE is nil, use '/etc/os-release'."
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(s-pad-right middle-padding " " (eshell-info-banner--with-face hostname :weight 'bold))
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uptime)
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(eshell-info-banner--display-battery left-padding bar-length)
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(eshell-info-banner--display-memory "Ram"
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(string-to-number (nth 2 ram))
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(string-to-number (nth 1 ram))
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left-padding
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bar-length)
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(eshell-info-banner--display-memory "Swap"
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(string-to-number (nth 2 swap))
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(string-to-number (nth 1 swap))
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left-padding
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bar-length)
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(mapconcat (lambda (partition)
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(eshell-info-banner--display-partition partition left-padding bar-length))
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partitions
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"\n")
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(eshell-info-banner--display-memory left-padding bar-length)
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"\n"
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(eshell-info-banner--display-partitions left-padding bar-length)
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(format "\n%s\n" (s-repeat tot-width eshell-info-banner-progress-bar-char)))))
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;;;###autoload
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