"There is no formatter for 'elixir' files installed"

[gunnars04]

Environment

Elixir 1.15.6
Phoenix 1.7.2

Current behavior

Formating not working in VSCode.

[lukaszsamson]

I cannot reproduce. Please fill up the template and post logs and your vscode settings.
Note you should have this in your vscode settings.json

"[elixir]": {
    "editor.defaultFormatter": "JakeBecker.elixir-ls"
  },

[gunnars04]

appsettings,json looks like this:

{
    "terminal.integrated.enableMultiLinePasteWarning": false,
    "files.autoSave": "afterDelay"
}

I still get the pop-up if I change it to this:

{
    "terminal.integrated.enableMultiLinePasteWarning": false,
    "files.autoSave": "afterDelay",
    "[elixir]": {
        "editor.defaultFormatter": "JakeBecker.elixir-ls"
      },
}

This is the file:
lib\pento_web\live\wrong_live.ex

defmodule PentoWeb.WrongLive do
  use PentoWeb, :live_view

  def mount(_params, _session, socket) do
    {:ok, assign(socket, score: 0, message: "Make a guess:")}
  end

  @spec render(any) :: Phoenix.LiveView.Rendered.t()
  def render(assigns) do
    ~H"""
    <h1 class="mb-4 text-4xl font-extrabold">Your score: <%= @score %></h1>

    <h2>
      <%= @message %>
    </h2>
    <br />
    <h2>
      <%= for n <- 1..10 do %>
        <.link
          class="bg-blue-500 hover:bg-blue-700
    text-white font-bold py-2 px-4 border border-blue-700 rounded m-1"
          phx-click="guess"
          phx-value-number={n}
        >
          <%= n %>
        </.link>
      <% end %>
    </h2>
    """
  end

  def handle_event("guess", %{"number" => guess}, socket) do
    message = "Your guess: #{guess}. Wrong. Guess again. "
    score = socket.assigns.score - 1

    {
      :noreply,
      assign(
        socket,
        message: message,
        score: score
      )
    }
  end
end

[gunnars04]

I got formatting to work with "run on save" with the command "mix format" I saw here:
https://elixirforum.com/t/problem-with-formatting-elixir-in-vs-code/52398/3

[lukaszsamson]

I'm asking about your settings.json. It usually is in

• Windows %APPDATA%\Code\User\settings.json
• macOS $HOME/Library/Application\ Support/Code/User/settings.json
• Linux $HOME/.config/Code/User/settings.json

Look for editor.defaultFormatter, most likely you have an override there. And if not there then in workspace .vscode/settings.json.
Another possibility is you may have some conflicting extension installed.

Generally, this seems to be a configuration issue. Maybe this thread will help you https://elixirforum.com/t/how-can-i-start-using-the-new-heex-formatter-in-vs-code/51420/2

[gunnars04]

I'm in windows10.
%APPDATA%\Code\User\settings.json has:

{
    "terminal.integrated.enableMultiLinePasteWarning": false,
    "files.autoSave": "afterDelay",
    "emeraldwalk.runonsave": {
        "commands": [
            {
                "match": ".ex",
                "cmd": "mix format"
            }
        ]
    }
}

I don't have any workspace settings.json

[lukaszsamson]

Sorry, I cannot reproduce that on Windows.
I tried on a fresh install



and after selecting the default formatter everything works as expected.
Please verify the extension is working. Please post logs from VSCode developer tools and ElixirLS output panel.

[gunnars04]

I did an uninstall + clean unstinstall:
Windows - Delete %APPDATA%\Code and %USERPROFILE%.vscode.
https://code.visualstudio.com/docs/setup/uninstall

Opened my project + downloaded only this plugin:

I still get the popup:

In VSCode:
File -> Preferences -> Settings + clicked the "settings.json" file in the top right corner which is empty:
{
}

I updated it to:
{
"[elixir]": {
"editor.defaultFormatter": "JakeBecker.elixir-ls"
},
}

I still get the same popup when I do ctrl + option + F

[lukaszsamson]

Please provide logs from VSCode Developer Tools logs and ElixirLS output tab logs @gunnars04

[gunnars04]

With only this in settings.json>
{
"[elixir]": {
"editor.defaultFormatter": "JakeBecker.elixir-ls"
}
}

Still install popup:

[lukaszsamson]

OK, it looks like the extension is activated but looking at the output tab it doesn't seem to be running. You should be seeing something like this in the output tab.

You didn't fill the issue template. Are you running a supported OTP version?

[gunnars04]

I think I'm using the latest:

[lukaszsamson]

OTP 26.0 has critical bugs on windows. It's mentioned in the readme https://github.com/elixir-lsp/elixir-ls#support-matrix. Please update to 26.1+. If you filled the issue template and provided logs as asked we wouldn't have been wasting time.

[gunnars04]

@lukaszsamson sorry about that, will do next time!

[gunnars04]

@lukaszsamson how do I do that?
I installed the latest Elixir:
https://github.com/elixir-lang/elixir/releases

I'm using the latest Elixir and Phoenix:
Elixir 1.15.6
Phoenix 1.7.2

[gunnars04]

@lukaszsamson never mind, I found it:
https://www.erlang.org/downloads

[gunnars04]

@lukaszsamson works now (after dl'in Erlang/OTP 26.1.1 in the link above)!

Sorry for that and thanks a lot!