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;;; td-shell.el --- a shell and a repl! -*- lexical-binding: t; -*-
;;; Code:
;;; Functions
(defun td/meow-insert-state (mode)
"If meow is installed, start `mode' in INSERT state."
(when (package-installed-p 'meow)
(add-to-list 'meow-mode-state-list `(,mode . insert))))
(defun td/eshell-prompt ()
(concat
(propertize (abbreviate-file-name (eshell/pwd)) 'face `(:foreground "white"))
(if (zerop (user-uid))
(propertize " # " 'face `(:foreground "red"))
(propertize " λ " 'face `(:foreground "yellow")))))
(defun td/eshell-configure ()
(require 'xterm-color)
(push 'xterm-color-filter eshell-preoutput-filter-functions)
(delq 'eshell-handle-ansi-color eshell-output-filter-functions)
(add-hook 'eshell-before-prompt-hook
(lambda ()
(setq xterm-color-preserve-properties t)))
;; Use xterm-256color when running interactive commands.
(add-hook 'eshell-pre-command-hook
(lambda () (setenv "TERM" "xterm-256color")))
(add-hook 'eshell-post-command-hook
(lambda () (setenv "TERM" "dumb")))
;; Save command history when commands are entered.
(add-hook 'eshell-pre-command-hook 'eshell-save-some-history)
;; Initialize the shell history.
(eshell-hist-initialize)
;; Truncate buffer for performance.
(add-to-list 'eshell-output-filter-functions 'eshell-truncate-buffer)
(setq eshell-prompt-function 'td/eshell-prompt
eshell-prompt-regexp "^.+ λ "
eshell-history-size 10000
eshell-buffer-maximum-lines 10000
eshell-hist-ignoredups t
eshell-highlight-prompt t
eshell-scroll-to-bottom-on-input t
eshell-prefer-lisp-functions nil))
(defun td/eshell-clear ()
"Allow the user to clear the current eshell buffer while retaining the
current line input."
(interactive)
(let ((input (eshell-get-old-input)))
(eshell/clear t)
(eshell-emit-prompt)
(insert input)))
;;; Packages
(use-package eat
:ensure t
:bind (("C-x S" . eat))
:custom
(eat-enable-autoline-mode t)
(eat-kill-buffer-on-exit t)
:config
(td/meow-insert-state 'eat-mode))
(use-package eshell
:ensure nil
:hook (eshell-first-time-mode . td/eshell-configure)
:bind (("C-x E" . eshell)
("C-l" . td/eshell-clear))
:config
(td/meow-insert-state 'eshell-mode))
(use-package eshell-syntax-highlighting
:ensure t
:after eshell
:config
(eshell-syntax-highlighting-global-mode +1))
(use-package xterm-color)
(provide 'td-shell)
;;; td-shell.el ends here
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