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;;; eshell-config.el --- Settings for the Emacs Shell -*- lexical-binding: t; coding: utf-8; -*-
;; author Craig Jennings <c@cjennings.net>
;;; Commentary:
;;
;; Layer: 3 (Domain Workflow).
;; Category: D/P.
;; Load shape: eager.
;; Eager reason: none; shell/REPL, a command/hook-loaded deferral candidate.
;; Top-level side effects: one add-hook, one advice-add, package config.
;; Runtime requires: system-utils.
;; Direct test load: yes.
;;
;; ESHELL
;; - Eshell is useful as a REPL
;; - Redirect to the kill ring : ls > /dev/kill
;; - Redirect to the clioboard : ls > /dev/clip
;; - Redirect to a buffer : ls > #<ls-output>
;; - Use elisp functions : write your own "detox" command in elisp
;; : then use it in eshell
;; - cd to remote directories : cd /sshx:c@cjennings.net:/home/cjennings
;; : and take all the elisp functionality remotely
;; : including Dired or Magit on a remote server
;;; Code:
(require 'system-utils)
(use-package eshell
:ensure nil ;; built-in
:commands (eshell)
:config
(setq eshell-banner-message "")
(setq eshell-scroll-to-bottom-on-input 'all)
(setq eshell-error-if-no-glob t)
(setq eshell-hist-ignoredups t)
(setq eshell-save-history-on-exit t)
(setq eshell-prefer-lisp-functions nil)
(setq eshell-destroy-buffer-when-process-dies t)
;; no pagers required
(setenv "PAGER" "cat")
(setq eshell-prompt-function
(lambda ()
(concat
(propertize (format-time-string "[%d-%m-%y %T]") 'face '(:foreground "gray"))
" "
(propertize (user-login-name) 'face '(:foreground "gray"))
" "
(propertize (system-name) 'face '(:foreground "gray"))
":"
(propertize (abbreviate-file-name (eshell/pwd)) 'face '(:foreground "gray"))
"\n"
(propertize "%" 'face '(:foreground "white"))
" ")))
(add-hook
'eshell-mode-hook
(lambda ()
(setq pcomplete-cycle-completions nil)))
(setq eshell-cmpl-cycle-completions nil)
(add-to-list 'eshell-modules-list 'eshell-tramp)
(add-hook 'eshell-hist-mode-hook
(lambda ()
(keymap-set eshell-hist-mode-map "<up>" #'previous-line)
(keymap-set eshell-hist-mode-map "<down>" #'next-line)))
(add-hook 'eshell-mode-hook
(lambda ()
(add-to-list 'eshell-visual-commands '("lf" "ranger" "tail" "htop" "gotop" "mc" "ncdu" "top"))
(add-to-list 'eshell-visual-subcommands '("git" "log" "diff" "show"))
(add-to-list 'eshell-visual-options '("git" "--help" "--paginate"))
;; aliases
(eshell/alias "e" "find-file $1")
(eshell/alias "em" "find-file $1")
(eshell/alias "emacs" "find-file $1")
(eshell/alias "open" "cj/xdg-open $1")
(eshell/alias "gocj" "cd /sshx:cjennings@cjennings.net:/var/cjennings/")
(eshell/alias "gosb" "cd /sshx:cjennings@wolf.usbx.me:/home/cjennings/")
(eshell/alias "gowolf" "cd /sshx:cjennings@wolf.usbx.me:/home/cjennings/")
(eshell/alias "v" "eshell-exec-visual $*")
(eshell/alias "ff" "find-file-other-window $1")
(eshell/alias "f" "find-using-dired $1")
(eshell/alias "r" "ranger")
(eshell/alias "ll" "ls -laF"))))
(defun eshell/find-file-other-window (&rest files)
"Open FILE(s) in other window from eshell."
(if (= 1 (length files))
;; Single file - just use it directly
(find-file-other-window (car files))
;; Multiple files - open each in other window
(dolist (file files)
(find-file-other-window file))))
(defun eshell/find-file (&rest files)
"Open FILE(s) from eshell."
(if (= 1 (length files))
;; Single file
(find-file (car files))
;; Multiple files
(dolist (file files)
(find-file file))))
(defun eshell/clear ()
"Clear the eshell buffer."
(let ((inhibit-read-only t))
(erase-buffer)
(eshell-send-input)))
(defun eshell/find-using-dired (file-pattern)
"Find a file matching FILE-PATTERN using `find-name-dired'."
(let ((escaped-pattern (regexp-quote file-pattern)))
(find-name-dired default-directory escaped-pattern)))
(defun cj/eshell-delete-window-on-exit ()
"Close the eshell window when exiting."
(when (not (one-window-p))
(delete-window)))
(advice-add 'eshell-life-is-too-much :after 'cj/eshell-delete-window-on-exit)
(use-package eshell-toggle
:custom
(eshell-toggle-size-fraction 2)
(eshell-toggle-run-command nil)
(eshell-toggle-init-function #'eshell-toggle-init-eshell)
:bind
("C-<f12>" . eshell-toggle))
(use-package xterm-color
:after eshell
:hook
(eshell-before-prompt-hook . (lambda ()
(setq xterm-color-preserve-properties t)))
;; Scope `TERM=xterm-256color' to eshell-spawned processes only by
;; binding the env var on the eshell mode hook. The previous global
;; `setenv' at config-time changed `process-environment' for the
;; whole Emacs process, so every subsequent `start-process' inherited
;; `xterm-256color' regardless of whether the receiver was a terminal
;; that could actually interpret the escapes.
:hook
(eshell-mode . (lambda ()
(setq-local process-environment
(cons "TERM=xterm-256color"
process-environment)))))
(use-package eshell-syntax-highlighting
:after esh-mode
:config
(eshell-syntax-highlighting-global-mode +1))
(use-package eshell-up
:after eshell
:config
(defalias 'eshell/up 'eshell-up)
(defalias 'eshell/up-peek 'eshell-up-peek))
;; Enhance history searching
(defun cj/eshell-history-search ()
"Search eshell history with completion."
(interactive)
(insert
(completing-read "Eshell history: "
(delete-dups
(ring-elements eshell-history-ring)))))
(add-hook 'eshell-mode-hook
(lambda ()
(keymap-set eshell-mode-map "C-r" #'cj/eshell-history-search)))
;; Better completion for eshell
(use-package pcmpl-args
:after eshell)
;; Company mode integration for eshell
(use-package company-shell
:after (eshell company)
:config
(add-to-list 'company-backends 'company-shell)
(add-hook 'eshell-mode-hook
(lambda ()
(setq-local company-minimum-prefix-length 2)
(setq-local company-idle-delay 2)
(company-mode 1))))
(provide 'eshell-config)
;;; eshell-config.el ends here.
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