5cf6a0b23d
In the past I used `defconst` in many of my Elisp libraries where I should've used something like: ```elisp ;; some/path/to/some-lib.el (defgroup some-lib nil) (defcustom some-lib-setting nil :group 'some-lib) ``` When I encounter code that I should've structured this way, I'm cleaning it up to prefer this more idiomatic pattern.
129 lines
4.7 KiB
EmacsLisp
129 lines
4.7 KiB
EmacsLisp
;;; vterm-mgt.el --- Help me manage my vterm instances -*- lexical-binding: t -*-
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;; Author: William Carroll <wpcarro@gmail.com>
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;; Version: 0.0.1
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;; URL: https://git.wpcarro.dev/wpcarro/briefcase
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;; Package-Requires: ((emacs "25.1"))
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;;; Commentary:
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;; Supporting functions to instantiate vterm buffers, kill existing vterm
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;; buffers, rename vterm buffers, cycle forwards and backwards through vterm
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;; buffers.
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;;
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;; Many of the functions defined herein are intended to be bound to
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;; `vterm-mode-map'. Some assertions are made to guard against calling
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;; functions that are intended to be called from outside of a vterm buffer.
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;; These assertions shouldn't error when the functions are bound to
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;; `vterm-mode-map'. If for some reason, you'd like to bind these functions to
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;; a separate keymap, caveat emptor.
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;;; Code:
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; Dependencies
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(require 'dash)
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(require 'cycle)
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(require 'vterm)
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; Configuration
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(defgroup vterm-mgt nil
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"Customization options for `vterm-mgt'.")
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(defcustom vterm-mgt-scroll-on-focus nil
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"When t, call `end-of-buffer' after focusing a vterm instance."
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:type '(boolean)
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:group 'vterm-mgt)
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(defconst vterm-mgt--instances (cycle-new)
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"A cycle tracking all of my vterm instances.")
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(defun vterm-mgt--instance? (b)
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"Return t if the buffer B is a vterm instance."
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(equal 'vterm-mode (buffer-local-value 'major-mode b)))
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(defmacro vterm-mgt--assert-vterm-buffer ()
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"Error when the `current-buffer' is not a vterm buffer."
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'(prelude-assert (vterm-mgt--instance? (current-buffer))))
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(defun vterm-mgt-next ()
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"Replace the current buffer with the next item in `vterm-mgt--instances'.
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This function should be called from a buffer running vterm."
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(interactive)
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(vterm-mgt--assert-vterm-buffer)
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(cycle-focus-item (current-buffer) vterm-mgt--instances)
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(switch-to-buffer (cycle-next vterm-mgt--instances))
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(when vterm-mgt-scroll-on-focus (end-of-buffer)))
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(defun vterm-mgt-prev ()
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"Replace the current buffer with the previous item in `vterm-mgt--instances'.
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This function should be called from a buffer running vterm."
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(interactive)
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(vterm-mgt--assert-vterm-buffer)
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(cycle-focus-item (current-buffer) vterm-mgt--instances)
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(switch-to-buffer (cycle-prev vterm-mgt--instances))
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(when vterm-mgt-scroll-on-focus (end-of-buffer)))
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(defun vterm-mgt-instantiate ()
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"Create a new vterm instance.
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Prefer calling this function instead of `vterm'. This function ensures that the
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newly created instance is added to `vterm-mgt--instances'.
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If however you must call `vterm', if you'd like to cycle through vterm
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instances, make sure you call `vterm-mgt-populate-cycle' to allow vterm-mgt to
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collect any untracked vterm instances."
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(interactive)
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(let ((buffer (vterm)))
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(cycle-append buffer vterm-mgt--instances)
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(cycle-focus-item buffer vterm-mgt--instances)))
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(defun vterm-mgt-kill ()
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"Kill the current buffer and remove it from `vterm-mgt--instances'.
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This function should be called from a buffer running vterm."
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(interactive)
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(vterm-mgt--assert-vterm-buffer)
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(let ((buffer (current-buffer)))
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(cycle-remove buffer vterm-mgt--instances)
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(kill-buffer buffer)))
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(defun vterm-mgt-find-or-create ()
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"Call `switch-to-buffer' on a focused vterm instance if there is one.
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When `cycle-focused?' returns nil, focus the first item in the cycle. When
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there are no items in the cycle, call `vterm-mgt-instantiate' to create a vterm
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instance."
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(interactive)
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(if (cycle-empty? vterm-mgt--instances)
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(vterm-mgt-instantiate)
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(if (cycle-focused? vterm-mgt--instances)
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(switch-to-buffer (cycle-current vterm-mgt--instances))
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(progn
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(cycle-jump 0 vterm-mgt--instances)
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(switch-to-buffer (cycle-current vterm-mgt--instances))))))
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(defun vterm-mgt-rename-buffer (name)
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"Rename the current buffer ensuring that its NAME is wrapped in *vterm*<...>.
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This function should be called from a buffer running vterm."
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(interactive "SRename vterm buffer: ")
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(vterm-mgt--assert-vterm-buffer)
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(rename-buffer (format "vterm<%s>" name)))
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(defun vterm-mgt-repopulate-cycle ()
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"Fill `vterm-mgt--instances' with the existing vterm buffers.
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If for whatever reason, the state of `vterm-mgt--instances' is corrupted and
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misaligns with the state of vterm buffers in Emacs, use this function to
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restore the state."
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(interactive)
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(setq vterm-mgt--instances
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(->> (buffer-list)
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(-filter #'vterm-mgt--instance?)
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cycle-from-list)))
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(provide 'vterm-mgt)
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;;; vterm-mgt.el ends here
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