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spacemacs/layers/+lang/julia/README.org

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#+TITLE: julia layer
#+TAGS: general|layer|multi-paradigm|programming
[[file:img/julia.png]]
* Table of Contents :TOC_5_gh:noexport:
- [[#description][Description]]
- [[#features][Features:]]
- [[#install][Install]]
- [[#lsp][LSP]]
- [[#options][Options]]
- [[#key-bindings][Key bindings]]
* Description
This layer adds support for [[https://julialang.org][Julia]] to Spacemacs.
** Features:
- Syntax highlighting
- Repl support
- Linting
- Completion
- Jump-to-definition
- Documentation on hover
* Install
To use this configuration layer, add it to your =~/.spacemacs=. You will need to
add =julia= to the existing =dotspacemacs-configuration-layers= list in this
file.
** LSP
This layer can be used with [[https://github.com/JuliaEditorSupport/LanguageServer.jl][LanguageServer.jl]] and Emacs [[https://github.com/emacs-lsp/lsp-mode][lsp-mode]] to provide
richer, IDE-like capabilities. To use this layer with lsp, you must do the
following:
1. =LanguageServer.jl= should be configured automatically, if not, see the
documentation of =lsp-julia=.
2. define the layer variable =julia-backend= to =lsp= in your dotfile
To enable language server functionality with this layer, follow the instructions
for installation, and then install this layer with:
#+BEGIN_SRC emacs-lisp
(setq-default
dotspacemacs-configuration-layers
'(
(julia :variables julia-backend 'lsp)))
#+END_SRC
=LanguageServer.jl= tends to have a very long startup time. In the worst case,
=lsp-mode= might give up on the language server before its started, but
regardless usage of =lsp-mode= with Julia can cause long delays when first
opening files.
* Options
While =julia-mode= is perfectly usable without configuration or other packages,
you can choose to replace the default functionality of using [[https://github.com/tpapp/julia-repl/][julia-repl]] as the
layer's interactive REPL with the ess REPL and other functionality that comes
with it. To do so, install this layer with:
#+BEGIN_SRC emacs-lisp
(setq-default
dotspacemacs-configuration-layers
'(
(julia :variables julia-mode-enable-ess t)))
#+END_SRC
* Key bindings
| Key binding | Description |
|-------------+----------------------------------------------------------------------------------------|
| ~TAB~ | Expands latex macro (e.g. =\delta=). |
| ~SPC m l~ | Expands latex macro (e.g. =\delta=). |
|-------------+----------------------------------------------------------------------------------------|
| ~SPC m = =~ | Indent line |
| ~SPC m = d~ | Deindent line |
| ~SPC m = q~ | Indent Sexp |
|-------------+----------------------------------------------------------------------------------------|
| ~SPC m '~ | Brings up Julia Repl (starts new one or focuses existing). |
| ~SPC m r~ | Brings up Julia Repl (starts new one or focuses existing). |
| ~SPC m h h~ | Calls ~@doc~ macro on symbol under cursor. |
|-------------+----------------------------------------------------------------------------------------|
| ~SPC m s a~ | Activate the project of the current buffer (call with prefix to activate home project) |
| ~SPC m s d~ | ~cd~ into the buffer directory |
| ~SPC m s i~ | Brings up Julia Repl (starts new one or focuses existing). |
| ~SPC m s b~ | Sends buffer to REPL. |
| ~SPC m s t~ | Sends buffer to REPL via ~Revise.includet~. |
| ~SPC m s l~ | Sends line to REPL. |
| ~SPC m s s~ | Sends line to REPL. |
| ~SPC m s r~ | Sends region or line to REPL. |
| ~SPC m s m~ | Call ~@macroexpand~ on an expression |
| ~SPC m s e~ | Call ~@edit~ on an expression |
| ~SPC m s v~ | Prompt and set a Julia REPL inferior buffer name for the current buffer |
|-------------+----------------------------------------------------------------------------------------|
| ~SPC m e a~ | Activate the project of the current buffer (call with prefix to activate home project) |
| ~SPC m e d~ | ~cd~ into the buffer directory |
| ~SPC m e i~ | Brings up Julia Repl (starts new one or focuses existing). |
| ~SPC m e b~ | Sends buffer to REPL. |
| ~SPC m e t~ | Sends buffer to REPL via ~Revise.includet~. |
| ~SPC m e l~ | Sends line to REPL. |
| ~SPC m e s~ | Sends line to REPL. |
| ~SPC m e r~ | Sends region or line to REPL. |
| ~SPC m e m~ | Call ~@macroexpand~ on an expression |
| ~SPC m e e~ | Call ~@edit~ on an expression |
| ~SPC m e v~ | Prompt and set a Julia REPL inferior buffer name for the current buffer |