bug: markdown syntax highlighting doesn't work in chat

[matthewblott]

Describe the bug

I have a pretty bland looking chat with no colours for the code snippets:

To reproduce

Open the chat window and type a command.

Expected behavior

Avante produced code to have proper syntax highlighting.

Environment

NVIM v0.10.1
Build type: Release
LuaJIT 2.1.1720049189
OS: macOS 14.5

Repro

require('user.plugins')
require('user.config')

[aarnphm]

can you provide a reproducer? that is actually not a reproducer

[matthewblott]

Okay. I've tried a fresh install with a bare bones configuration and lazy.nvim installed at ${HOME}/.local/share/nvim/lazy.nvim. The result is the same. Here is the init.lua config in full:

local lazypath = vim.fn.stdpath 'data' .. '/lazy/lazy.nvim'

if not vim.loop.fs_stat(lazypath) then
  vim.fn.system {
    'git',
    'clone',
    '--filter=blob:none',
    'https://github.com/folke/lazy.nvim.git',
    '--branch=stable', -- latest stable release
    lazypath,
  }
end

vim.opt.rtp:prepend(lazypath)

require('lazy').setup({
  {
    'yetone/avante.nvim',
    event = 'VeryLazy',
    lazy = false,
    version = false, 
    opts = {
      provider = "openai",
    },
    build = 'make BUILD_FROM_SOURCE=true',
    dependencies = {
      'stevearc/dressing.nvim',
      'nvim-lua/plenary.nvim',
      'MunifTanjim/nui.nvim',
      {
        'MeanderingProgrammer/render-markdown.nvim',
        opts = {
          file_types = { 'markdown', 'Avante' },
        },
        ft = { 'markdown', 'Avante' },
      },
    },
  },

}) 

vim.wo.number = true
vim.wo.relativenumber = true
vim.opt.expandtab = true
vim.opt.clipboard = 'unnamedplus'

vim.g.mapleader = ' '

I tried to keep everything to a minimum. I also tried the config as suggested on the homepage of this site.

[ddillert]

Have you tested with other languages? If they work, could you try running :TSInstall ruby? This command installs the Tree-sitter plugin for Ruby.

[matthewblott]

I've tried a few languages, it's the same issue for all of them. I've tried with Treesiter and without and the result is the same 🤷‍♂️

[saifulapm]

Same also here..

[radwo]

Does it work for other *.md files? I had the same issue and was missing the markdown parser for treesitter.

[yetone]

:TSInstall markdown may be help

[saifulapm]

I have TS installed for markdown and markdown_inline

my plugin config

{
    "yetone/avante.nvim",
    version = "*",
    build = "make",
    cmd = "AvanteChat",
    opts = {
      provider = "copilot",
    },
  }
{
    "MeanderingProgrammer/render-markdown.nvim",
    opts = {
      file_types = { "markdown", "Avante", "codecompanion", "AvanteInput" },
      code = {
        position = "right",
      },
    },
    ft = { "markdown", "Avante", "codecompanion", "AvanteInput" },
  }

You can check this video:

Screen.Recording.2024-11-26.at.11.20.08.AM.mov

I am having same issue for codecompanion also. But on copilot-chat, syntax highlight working good. I don;t know when not working for Avante and codecompanion.

Any Idea ?

[malkoG]

Did you open to check markdown files?
I also facing this issue and code block inside markdown is not properly highlighted.

I think this is render-markdown.nvim's issue

[devstefancho]

In my case, I can't not reproduce this issue, Could you share render-markdown commit version?
Fyi, my commit version in lazy-lock.json

"avante.nvim": { "branch": "main", "commit": "71c9a7911b9cd91c946f22099a515bb495a4b256" },
"render-markdown.nvim": { "branch": "main", "commit": "82184c4a3c3580a7a859b2cb7e58f16c10fd29ef" },

[theahura]

I am also struggling with this.

At first I thought it was my render-markdown.nvim package, because opening a standard *.md file would show the same non-highlighting. I was able to fix this by adding the following explicitly:

vim.opt.syntax = "on"
vim.g.markdown_fenced_languages = {'Avante', 'python', 'javascript', 'html', 'bash', 'sh'}

However, this did not fix the in-chat behavior of the markdown plugin. In chat, I was still getting no syntax highlighting for languages.

As we would expect, the set ifletype? command shows the file is of type Avante. Same with echo b:current_syntax. Setting the syntax to markdown explicitly (using set syntax=markdown) or to the markdown filetype (using set filetype=markdown) didn't fix the problem unfortunately.

As a last attempt, I copied the entire chat buffer into a markdown file to see what would happen. Interestingly this DID screw up the syntax highlighting. On further inspection, it looks like something weird is going on in the interaction between the markdown > quote block and the multiline syntax-highlighted code block. More investigation required...

[theahura]

Filed a potentially related bug on render-markdown.nvim -- MeanderingProgrammer/render-markdown.nvim#249