Zed Julia

This extension adds support for the Julia language in the zed editor.

Installing Julia / Zed / Zed Julia extension

1. Install Julia for your platform: https://julialang.org/downloads/
2. Install Zed for your platform: https://zed.dev/download
3. Start Zed.
4. Inside Zed, go to the extensions view by executing the zed: extensions command (click Zed->Extensions).
5. In the extensions view, simply search for the term julia in the search box, then select the extension named Julia and click the install button. You might have to restart Zed after this step.

The Julia Zed extension looks for your Julia binary in the standard locations. Make sure that the Julia binary is on your PATH.

Contributing

See this document.

Using Zed in the REPL

Zed is currently not on the list of Julia's predefined editors. You can add it to your ~/.julia/config/startup.jl:

atreplinit() do repl
    InteractiveUtils.define_editor("zed") do cmd, path, line, column
        `$cmd $path:$line:$column`
    end
end

Set the environment variable EDITOR (or VISUAL or JULIA_EDITOR, whatever you use) to zed --wait. Then, using InteractiveUtils.edit etc. will open the document in Zed.

Customizing syntax highlighting

You can change the foreground color and text attributes of syntax tokens in your ~/.config/zed/settings.json, for instance:

{
  "experimental.theme_overrides": {
    "syntax": {
      "comment.doc": {
        "color": "#808080",
        "font_style": "italic"
      },
      "function.definition": {
        "color": "#0000AA",
        "font_weight": 700
      }
    }
  }
}

Note: the "color" field is mandatory even if you just want to change the "font_style" (the example in Zed's docs does not work).

See Syntax Highlighting and Themes and Tree-sitter Queries for further details.

Syntax tokens are called captures in tree-sitter jargon. The following table lists all captures provided by zed-julia. Some captures have default values (defined in Zed's color themes) and the other captures fall back to one of the defaults. Depending on your color theme, some captures may be set to the editor's foreground color or to a very similar one. In this case, try to assign a different color to improve the contrast.

Capture	Is there a default value?	Note/Example
boolean	yes
comment	yes	line or block comment
comment.doc	yes	docstring
constant.builtin	no, falls back to constant	core julia built-in
function.builtin	no, falls back to function	core julia built-in
function.call	no, falls back to function	name of the called function
function.definition	no, falls back to function	name of the defined function
function.macro	no, falls back to function	name of the macro
keyword	yes
keyword.conditional	no, falls back to keyword	if, else
keyword.conditional.ternary	no, falls back to keyword	? :
keyword.exception	no, falls back to keyword	try, catch
keyword.function	no, falls back to keyword	function, do, short function definition: =
keyword.import	no, falls back to keyword	im/export, using, module definition
keyword.operator	no, falls back to keyword	in, isa, where
keyword.repeat	no, falls back to keyword	for, while
keyword.return	no, falls back to keyword	return
number	yes
number.float	no, falls back to number
operator	yes
punctuation.bracket	yes	(), [], {}
punctuation.delimiter	yes	,, ;
punctuation.special	yes	string interpolation: $()
string	yes
string.escape	yes	escape sequence
string.special	yes	command literal
string.special.symbol	yes	quote expression
type	yes
type.builtin	no, falls back to type	core julia built-in
type.definition	no, falls back to type
variable	yes
variable.builtin	no, falls back to variable	core julia built-in: begin and end in indices
variable.member	no, falls back to variable	example: in foo.bar, the member is bar