This configuration is part of the Emacs for Clojure presentation for
clojure-vienna.
- Emacs 25
- Java 8
Either place .emacs.d inside you home directory or start emacs with
an alternative home directory:
env HOME=/path/to/emacs-clojure-vienna emacs
Depending on your distribution, you might also have to copy your
.Xauthority file into this directory.
- Buffer : Content holder, can be associated with a file
- Window : Pane in a frame (split)
- Frame : An os-level Emacs window
C- means hold Ctrl key, M- means hold Alt key.
For terminals not forwarding Alt, you can simulate M- by prefix
pressing ESC.
-
General
- C-g : Emacs' escape
- M-x : Command prompt
- C-l : Recenter window
- C-x C-c : Quit Emacs
- C-x C-f : Find file (open)
- C-x C-s : Save file
- C-x C-w : Write file (save-as)
- C-/ : undo
- M-x customize-{group,variable} : use Emacs' customization system
- C-] : escape recursive edit (elisp debugger)
- C-u : Numeric argument prefix (universal)
- C-q : Quoting prefix to insert control characters
- C-j : Enter, for when enter would mean something else
-
Movement / Navigation
- C-r, C-s : Search forward, Search backward
- C-b, C-p, C-f, C-n : ←, ↑, →, ↓
- M-v, C-v : PgUp ⇞, PgDwn ⇟
- C-M-<, C-M-> : Home ↖, End ↘
-
Help
- C-h f : describe-function
- C-h k : describe-key
- C-h v : describe-variable
-
Buffer Management
- C-x b : switch-buffer
- C-x C-b : list buffers
-
Window Management
- C-x 0 : Close this window
- C-x 1 : Close all other windows
- C-x 2 : Split vertical
- C-x 3 : Split horizontal
- C-x o : Cycle through windows
- q : in many read-only buffers, this closes the popup window
-
Mark / Copy / Paste
- C-SPC : set mark
- M-w : copy
- C-w : cut
- C-y : paste
- M-y : cycle pastes (after paste)
- C-x h : select whole buffer
;;; -*- lexical-binding: t -*-
Lexical binding is a recent feature of Elisp, so it has to be
activated by putting this comment at the beginning of .el files.
Elisp is a Lisp-2: You can't take the value of a function, instead you use funcall on a symbol or lambda:
Clojure: (let [f first g #(second %) lst '(4 5 6)] (list (f lst) (g lst)))
Elisp: (let ((f 'car) (g (lambda (x) (cadr x))) (lst '(4 5 6))) (list (funcall f lst) (funcall g lst)))
If your distro doesn't provide (m)elpa packages (most don't), use Emacs' builtin package manager to install and update your packages.
First thing, you'll want to do is to add melpa as a package source:
M-x customize-variable
package-archives
Archive name: melpa
URL: http://melpa.milkbox.net/packages/
Then invoke M-x list-packages and install the packages we need for
the presentation.
-
Key Bindings
- i : mark for installation
- d : mark for deletion
- u : unmark
- x : execute
-
Required packages
- cider
- clojure-mode
- clj-refactor
- paredit
- rainbow-delimiters
- M-: : eval-expression
- C-M-x : eval-defun
- C-x C-e : eval last sexpr
- M-x eval-buffer
- M-x toggle-debug-on-error
- M-x ielm
- C-u C-M-x : instrument defun
See Help keybindings above on how to browse documentation.
Cider is the bridge between Clojure and Emacs. It lets Emacs communicate with Clojure process via Nrepl.
Here we don't focus on the nrepl wire protocol, but rather on how Nrepl's extensibility is used to create a full IDE-like experience.
Please refer to the cider docs
- C-M-x : eval toplevel form
- C-x C-e : eval last sexpr (use this within (comment) forms)
- C-c C-k : load buffer
- M-. : goto definition
- M-, : come back from definition
- C-c C-d d, C-c C-d C-d : cider-doc
- C-u C-M-x : instrument toplevel form
When used with clj-refactor + refactor-nrepl, Cider users even get access to powerful
refactoring methods based on tools.analyzer:
Unfortunately, refactor-nrepl is quite unstable and the more powerful refactorings break often with updates.
Use magit as a git frontend.
Use smex as an M-x replacement.
Use org-mode for organizing your thoughts, project planning and time tracking.
Use ibuffer as a C-x C-b replacement.