C# Dotnet show virtual text warnings/errors in vim virtual text

csharp.vim

" Call DotnetRunAndShowVirtualText on file open & save
autocmd BufReadPost,BufWritePost *.cs |  call DotnetRunAndShowVirtualText()
" Delete virtual text on a buffer when it is modified
autocmd TextChanged,TextChangedI *.cs lua vim.api.nvim_buf_clear_namespace(0, -1, vim.fn.line(".") - 1, vim.fn.line("."))

highlight MyWarningVirtualText guifg=orange
highlight MyErrorVirtualText guifg=red

function! DotnetRunAndShowVirtualText()
  lua << EOF
    -- Get the name of the currently open file
    local target_file = vim.api.nvim_buf_get_name(0)

    -- Clear the existing virtual text from every line
    vim.api.nvim_buf_clear_namespace(0, -1, 0, -1)

    -- Define a handler for the job output
    local on_stdout = function(_, data, _)
      -- Parse the output
      for _, line in ipairs(data) do
        -- Split the line into parts
        local parts = {}
        for part in line:gmatch("%S+") do
          table.insert(parts, part)
        end

        -- Extract the file path, line number and message
        local file_and_line = parts[1]
        local message = table.concat(parts, " ", 3)

        -- Remove the file name from the end of the message
        message = message:gsub(" %[.*%]$", "")

        -- Extract the file path and line number from the file and line part
        local file_path, line_number = file_and_line:match("^(.-)%((%d+),")

        if file_path == target_file and line_number then
          -- Convert the line number to a number
          line_number = tonumber(line_number)

          local highlight_group = line:find("error CS") and "MyErrorVirtualText" or "MyWarningVirtualText"

          -- Add virtual text to the line with the error or warning, with spaces added for padding
          vim.api.nvim_buf_set_virtual_text(0, -1, line_number - 1, {{"    "..message, highlight_group}}, {})
        end
      end
    end

    -- Start the job
    vim.fn.jobstart("dotnet run", {on_stdout = on_stdout})
EOF
endfunction