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| <!DOCTYPE html> | ||
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| <div class="post-date">10 Jul 2021</div><h1 class="post-title"><a href="https://www.birkey.co/2021-07-10-why-eshell-part-3.html">Why Eshell - Part 3</a></h1> | ||
| <p> | ||
| If you have been following my `Why Eshell` series, you might be | ||
| wondering about interactive ido completion for eshell. Since Eshell | ||
| buffer is just a regular emacs buffer, we can compose few emacs | ||
| builtin functionalities to bend it to our command line work flow. | ||
| Following is all the code you need. Note that it is heavily commented | ||
| so you can understand what is happening. | ||
| </p> | ||
| <div class="org-src-container"> | ||
| <pre class="src src-emacs-lisp">(defun kshell-with-name (&optional name) | ||
| ;; creates an eshell buffer with `kshell' as the default name. Take | ||
| ;; optional name to override | ||
| (let ((m (->> (or name "kshell") | ||
| (format "*%s*")))) | ||
| (if (get-buffer m) | ||
| (pop-to-buffer m) | ||
| (progn | ||
| (eshell) | ||
| (rename-buffer m))))) | ||
|
|
||
| (defun kshell (&optional cmd buff-name send-input) | ||
| ;; interactive fn that you can call via M-x or hotkey. It detects | ||
| ;; current project root to start eshell buffer if no `buff-name' is | ||
| ;; given. You can control how the `cmd` gets insert only or insert | ||
| ;; and executed using `send-input` flag. Ex. Useful for further | ||
| ;; editing. | ||
| (interactive) | ||
| (let ((dir (projectile-project-root))) ;; you need projectile | ||
| (if buff-name | ||
| (kshell-with-name buff-name) | ||
| (kshell-with-name)) | ||
| (eshell/clear-scrollback) | ||
| (insert (format "cd %s" (or dir "~/"))) | ||
| (eshell-send-input) | ||
| (insert (format "%s" cmd)) | ||
| (when send-input (eshell-send-input)))) | ||
|
|
||
| (defun krun (cmd) | ||
| ;; eshell command history with ido completion. Assign it to a hot | ||
| ;; key say, F12 and you will get a search-able command history that | ||
| ;; you can execute just by doing ido interactive search. | ||
| (interactive | ||
| (list | ||
| (ido-completing-read | ||
| "Enter cmd to run (append ##name for buffer name): " | ||
| (let ((history nil)) | ||
| ;; We have to build up a list ourselves from the ring vector. | ||
| (dotimes (index (ring-length keshell-history-global-ring)) | ||
| (push (ring-ref keshell-history-global-ring index) history)) | ||
| ;; Show them most-recent-first. | ||
| (setq history (nreverse history)))))) | ||
| (let* ((cmds (split-string cmd "##")) ;; you need s.el lib | ||
| (tag (or (-> cmds second) | ||
| "kshell")) | ||
| (buff-name (-> tag s-chomp s-trim))) | ||
| (kshell cmd buff-name))) | ||
| </pre> | ||
| </div> | ||
| <p> | ||
| Here is the screen recording in action: | ||
| <img src="https://www.birkey.co/images/eshell-ido-interactive.gif" alt="eshell-ido-interactive.gif"> | ||
| </p> | ||
|
|
||
| <p> | ||
| I am using F12 to invoke `krun` and my cross session eshell history | ||
| shows up in the minibuffer where I can use ido completion to select a | ||
| command that I can run. As an added benefit, above code allows one to | ||
| bring a eshell buffer with specific name by adding ##name at the end | ||
| of the command if one wants to have the command run in a dedicated | ||
| buffer. | ||
| </p> | ||
| <div class="taglist"><a href="https://www.birkey.co/tags.html">Tags</a>: <a href="https://www.birkey.co/tag-eshell.html">eshell</a> <a href="https://www.birkey.co/tag-emacs.html">emacs</a> </div></div> | ||
| <div id="postamble" class="status"><br><center> | ||
| <div style="display: inline-block; vertical-align:middle;"></div></div> | ||
| </body> | ||
| </html> |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,68 @@ | ||
| #+title: Why Eshell - Part 3 | ||
| #+date: <2021-07-10 10:18> | ||
| #+filetags: eshell emacs | ||
|
|
||
| If you have been following my `Why Eshell` series, you might be | ||
| wondering about interactive ido completion for eshell. Since Eshell | ||
| buffer is just a regular emacs buffer, we can compose few emacs | ||
| builtin functionalities to bend it to our command line work flow. | ||
| Following is all the code you need. Note that it is heavily commented | ||
| so you can understand what is happening. | ||
| #+begin_src emacs-lisp | ||
| (defun kshell-with-name (&optional name) | ||
| ;; creates an eshell buffer with `kshell' as the default name. Take | ||
| ;; optional name to override | ||
| (let ((m (->> (or name "kshell") | ||
| (format "*%s*")))) | ||
| (if (get-buffer m) | ||
| (pop-to-buffer m) | ||
| (progn | ||
| (eshell) | ||
| (rename-buffer m))))) | ||
|
|
||
| (defun kshell (&optional cmd buff-name send-input) | ||
| ;; interactive fn that you can call via M-x or hotkey. It detects | ||
| ;; current project root to start eshell buffer if no `buff-name' is | ||
| ;; given. You can control how the `cmd` gets insert only or insert | ||
| ;; and executed using `send-input` flag. Ex. Useful for further | ||
| ;; editing. | ||
| (interactive) | ||
| (let ((dir (projectile-project-root))) ;; you need projectile | ||
| (if buff-name | ||
| (kshell-with-name buff-name) | ||
| (kshell-with-name)) | ||
| (eshell/clear-scrollback) | ||
| (insert (format "cd %s" (or dir "~/"))) | ||
| (eshell-send-input) | ||
| (insert (format "%s" cmd)) | ||
| (when send-input (eshell-send-input)))) | ||
|
|
||
| (defun krun (cmd) | ||
| ;; eshell command history with ido completion. Assign it to a hot | ||
| ;; key say, F12 and you will get a search-able command history that | ||
| ;; you can execute just by doing ido interactive search. | ||
| (interactive | ||
| (list | ||
| (ido-completing-read | ||
| "Enter cmd to run (append ##name for buffer name): " | ||
| (let ((history nil)) | ||
| ;; We have to build up a list ourselves from the ring vector. | ||
| (dotimes (index (ring-length keshell-history-global-ring)) | ||
| (push (ring-ref keshell-history-global-ring index) history)) | ||
| ;; Show them most-recent-first. | ||
| (setq history (nreverse history)))))) | ||
| (let* ((cmds (split-string cmd "##")) ;; you need s.el lib | ||
| (tag (or (-> cmds second) | ||
| "kshell")) | ||
| (buff-name (-> tag s-chomp s-trim))) | ||
| (kshell cmd buff-name))) | ||
| #+end_src | ||
| Here is the screen recording in action: | ||
| https://www.birkey.co/images/eshell-ido-interactive.gif | ||
|
|
||
| I am using F12 to invoke `krun` and my cross session eshell history | ||
| shows up in the minibuffer where I can use ido completion to select a | ||
| command that I can run. As an added benefit, above code allows one to | ||
| bring a eshell buffer with specific name by adding ##name at the end | ||
| of the command if one wants to have the command run in a dedicated | ||
| buffer. |
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