v0.22.1 can not logger format liveview projects

[NoBrainSkull]

Environment

• Elixir & Erlang versions (elixir --version):
  Tested with both :

Erlang/OTP 27 [erts-15.0] [source] [64-bit] [smp:24:24] [ds:24:24:10] [async-threads:1] [jit:ns]

Elixir 1.17.2 (compiled with Erlang/OTP 27)

and

Erlang/OTP 26 [erts-14.2.1] [source] [64-bit] [smp:24:24] [ds:24:24:10] [async-threads:1] [jit:ns]

Elixir 1.16.3 (compiled with Erlang/OTP 26)

• Elixir Language Server version: v0.22.1
• Operating system: Archlinux
• Editor or IDE name (e.g. Emacs/VSCode): Neovim
• Editor Plugin/LSP Client name and version: nvim-lsp

Current behavior

Calling the LSP format function will fail with the following :

(Mix.Error) Formatter plugin Phoenix.LiveView.HTMLFormatter cannot be found

For some reason, the &Code.ensure_loaded?/1 call in the &load_plugins function returns false for the LiveView.HTMLFormatter in this version

Expected behavior

Reverting elixir-ls to v0.22.0 fixes the problem entirely, with no observed impact from Elixir/OTP version.

[lukaszsamson]

I cannot reproduce that. Formatting a live_view project works on my machine. Note that there were no changes that could affect formatting between v0.22.0 and v0.22.1. Do you have a project that reproduces it reliably?

[NoBrainSkull]

Sure, please find the link below.

I must add that for 1 second I thought that reverting to v0.22.0 and upgrading again to v0.22.1 solved the issue but removing .elixir_ls, deps/ and build made it appear again (after reinstalling, deps and compiling).

Here is the full output I'm having :

LSP[elixirls] Unable to find formatter for /home/no_brain_skull/src/ex17ls/.formatter.exs: "** 
		(Mix.Error) Formatter plugin Phoenix.LiveView.HTMLFormatter cannot be found
		(mix 1.15.0) lib/mix.ex:577: Mix.raise/2
    (language_server 0.22.1) lib/language_server/mix_tasks/format.ex:302: anonymous fn/2 in Mix.Tasks.ElixirLSFormat.load_plugins/1
    (elixir 1.15.0) lib/enum.ex:2510: Enum.\"-reduce/3-lists^foldl/2-0-\"/3
    (language_server 0.22.1) lib/language_server/mix_tasks/format.ex:299: Mix.Tasks.ElixirLSFormat.load_plugins/1
    (language_server 0.22.1) lib/language_server/mix_tasks/format.ex:362: Mix.Tasks.ElixirLSFormat.formatter_for_file/2
    (language_server 0.22.1) lib/language_server/source_file.ex:277: ElixirLS.LanguageServer.SourceFile.formatter_for/3
    (language_server 0.22.1) lib/language_server/providers/formatting.ex:13: ElixirLS.LanguageServer.Providers.Formatting.format/4
    (language_server 0.22.1) lib/language_server/server.ex:1280: anonymous fn/3 in ElixirLS.LanguageServer.Server.handle_request_async/2"

And here is the reproduction repo. It's a freshly generated liveview app with nothing special.

[lukaszsamson]

@NoBrainSkull Formatting works for me with your repo. Tested on macOS VSCode v0.22.1, elixir 1.17.2, OTP 26

[NoBrainSkull]

Well I guess the problem is on my end then... For the records, I'm using neovim and installed elixir-ls through Mason.

I do have the problem but I'm fine staying on the v0.22.0 for now. I suggest closing this issue and maybe reopening if someone else has a similar problem ?

Thank you for your time !

[jamilabreu]

I'm also getting the same error at times, and it randomly goes away

[kabturek]

I'm also getting an error on neovim (Lazy). Removing the plugin fixes the issue.

   Error  12:00:55 lsp.message LSP Message (elixirls) Unable to find formatter for /Users/kabturek/projects/insight/.formatter.exs: "
** (Mix.Error) Formatter plugin Phoenix.LiveView.HTMLFormatter cannot be found\n    
(mix 1.17.2) lib/mix.ex:588: Mix.raise/2\n    
(language_server 0.22.1) lib/language_server/mix_tasks/format.ex:302: anonymous fn/2 in Mix.Tasks.ElixirLSFormat.load_plugins/1\n    
(elixir 1.17.2) lib/enum.ex:2531: Enum.\"-reduce/3-lists^foldl/2-0-\"/3\n    
(language_server 0.22.1) lib/language_server/mix_tasks/format.ex:299: Mix.Tasks.ElixirLSFormat.load_plugins/1\n    
(language_server 0.22.1) lib/language_server/mix_tasks/format.ex:362: Mix.Tasks.ElixirLSFormat.formatter_for_file/2\n    
(language_server 0.22.1) lib/language_server/source_file.ex:277: ElixirLS.LanguageServer.SourceFile.formatter_for/3\n    
(language_server 0.22.1) lib/language_server/providers/formatting.ex:13: ElixirLS.LanguageServer.Providers.Formatting.format/4\n    
(language_server 0.22.1) lib/language_server/server.ex:1280: anonymous fn/3 in ElixirLS.LanguageServer.Server.handle_request_async/2\n"

Erlang/OTP 27 [erts-15.0.1] [source] [64-bit] [smp:8:8] [ds:8:8:10] [async-threads:1] [jit]
Elixir 1.17.2 (compiled with Erlang/OTP 27)

Elixir Language Server version: v0.22.1
Operating system: Mac
Editor or IDE name (e.g. Emacs/VSCode): Neovim
Editor Plugin/LSP Client name and version: nvim-lspconfig/mason (default LazyVim config)

[aar2dee2]

getting the same error
elixir v1.17.2
live_view v1.0.0-rc.6
macOS

Also getting it for projects with older versions of LiveView. Error disappears if I uninstall the extension.

[adamu]

I was also experiencing this with coc.nvim after upgrading to Elixir 1.17.2.

Funnily enough, just leaving the editor open for a few minutes resolved the issue. I guess it was compiling, but each interaction was interrupting the process. I confirmed that Elixir.Phoenix.LiveView.HTMLFormatter.beam was missing from .elixir_ls/build/dev_test/lib/phoenix_live_view/ebin (actually the phoenix_live_view directory didn't exist), but it appeared after waiting a bit.

edit: Confirmed that deleting .elixir-ls/build then opening a .ex file and waiting for .elixir_ls/build/dev_test/lib/phoenix_live_view to show up again resolves the issue for me.

[numso]

I've also been experiencing this issue off and on (in vscode). Sometimes the formatter fixes itself; other times it'll stay broken for days. The best way I've found to fix it when it does remain broken is:

1. Remove plugins: [TailwindFormatter, Phoenix.LiveView.HTMLFormatter], from my .formatter.exs
2. Go save a random .heex file in my project
3. Revert the change made in step 1

Seems like maybe elixir_ls sometimes has an issue compiling those plugins and following those steps forces a re-compile.

[ravensiris]

Had the same issue with styler.
I fixed it by copying _build/test/lib/styler/ to .elixir_ls/build/test/lib/.

[grahac]

Just adding in I had this for weeks. Elixir 1.17.2, OTP 27. Tried installing older versions, uninstalling, reinstalling. Nothing worked. Eventually I uninstalled, trashed the .elixir_ls folder, reinstalled an older version and then upgraded and it worked!

[RobertoSchneiders]

I have the same issue with VSCode, ElixirLS 0.23.0, Elixir 1.17.2, and OTP 27.

I tried some of the solutions presented here but none worked for me. However, sometimes just leaving VSCode open resolves the issue as some already pointed out. One weird thing is that I have the VSCode plugin v0.23.1 but the language server is 0.23.0, I'm not sure what is going on there.

Unable to find formatter for some_path/app.html.heex: ** (Mix.Error) Formatter plugin Phoenix.LiveView.HTMLFormatter cannot be found
(mix 1.17.2) lib/mix.ex:588: Mix.raise/2
(language_server 0.23.0) lib/language_server/mix_tasks/format.ex:302: anonymous fn/2 in Mix.Tasks.ElixirLSFormat.load_plugins/1
(elixir 1.17.2) lib/enum.ex:2531: Enum.\"-reduce/3-lists^foldl/2-0-\"/3
(language_server 0.23.0) lib/language_server/mix_tasks/format.ex:299: Mix.Tasks.ElixirLSFormat.load_plugins/1
(language_server 0.23.0) lib/language_server/mix_tasks/format.ex:362: Mix.Tasks.ElixirLSFormat.formatter_for_file/2
(language_server 0.23.0) lib/language_server/source_file.ex:277: ElixirLS.LanguageServer.SourceFile.formatter_for/3
(language_server 0.23.0) lib/language_server/providers/formatting.ex:13: ElixirLS.LanguageServer.Providers.Formatting.format/4
(language_server 0.23.0) lib/language_server/server.ex:1280: anonymous fn/3 in ElixirLS.LanguageServer.Server.handle_request_async/2

Elixir Language Server version: v0.23.0
Operating system: Ubuntu (VSCode Server)
Editor or IDE name: VSCode
Editor Plugin/LSP Client name and version: vscode-elixir-ls (0.23.1)

[lukaszsamson]

One weird thing is that I have the VSCode plugin v0.23.1 but the language server is 0.23.0

This is correct. Plugin versioning is independent from language server versioning.

[goulvenclech]

Same error :

Unable to find formatter for /Users/goulvenclech/Documents/encheres_immo/lib/encheres_immo_web/components/form/combobox.ex: "** (Mix.Error) Formatter plugin Surface.Formatter.Plugin cannot be found    
(mix 1.17.2) lib/mix.ex:588: Mix.raise/2    
(language_server 0.23.0) lib/language_server/mix_tasks/format.ex:302: anonymous fn/2 in Mix.Tasks.ElixirLSFormat.load_plugins/1    
(elixir 1.17.2) lib/enum.ex:2531: Enum.\"-reduce/3-lists^foldl/2-0-\"/3    
(language_server 0.23.0) lib/language_server/mix_tasks/format.ex:299: Mix.Tasks.ElixirLSFormat.load_plugins/1    
(language_server 0.23.0) lib/language_server/mix_tasks/format.ex:362: Mix.Tasks.ElixirLSFormat.formatter_for_file/2    
(language_server 0.23.0) lib/language_server/source_file.ex:277: ElixirLS.LanguageServer.SourceFile.formatter_for/3    
(language_server 0.23.0) lib/language_server/providers/formatting.ex:13: ElixirLS.LanguageServer.Providers.Formatting.format/4\n    (language_server 0.23.0) lib/language_server/server.ex:1280: anonymous fn/3 in ElixirLS.LanguageServer.Server.handle_request_async/2"

Erlang/OTP 26
Elixir 1.17.2
ElixirLS plugin v0.23.1
ElixirLS v0.23.0
VScode 1.92.2 (Universal)
MacOS 14.5 (23F79)

Fixed after following this post on Elixir Forum :

Just adding in I had this for weeks on latest version of ElixirLS (0.23.1). Elixir 1.17.2, OTP 27. Tried installing older versions, uninstalling, reinstalling. Nothing worked. Eventually I uninstalled, trashed the .elixir_ls folder, reinstalled an older version and then upgraded Elixir LS and it worked!