Add debug logs around latex converter executable

# Details

Adds a debug statement around whether latex executable can
be found or not.

Make the executable used configurable, because why not.

Other minor changes:

- Remove neoconf, not needed after moving to lazydev
- Add test.md to .gitignore, for use when testing problems
- Add nil checkout around treesitter highlight module
- Avoid vim.inspect when logging strings since double quotes
  make things look worse in this case
- Log language as a string instead of a table

Author: MeanderingProgrammer

.gitignore

@@ -1 +1,2 @@
 large.md
+test.md

.neoconf.json

@@ -108,6 +108,8 @@ require('render-markdown').setup({
 
         (shortcut_link) @callout
     ]],
+    -- Executable used to convert latex formula to rendered unicode
+    latex_converter = 'latex2text',
     -- The level of logs to write to file: vim.fn.stdpath('state') .. '/render-markdown.log'
     -- Only intended to be used for plugin development / debugging
     log_level = 'error',

README.md

@@ -15,17 +15,20 @@ local M = {}
 ---@param root TSNode
 ---@param buf integer
 M.render = function(namespace, root, buf)
-    if vim.fn.executable('latex2text') ~= 1 then
+    local converter = state.config.latex_converter
+    if vim.fn.executable(converter) ~= 1 then
+        logger.debug('Executable not found: ' .. converter)
         return
     end
+    logger.debug('Executable found: ' .. converter)
 
     local value = vim.treesitter.get_node_text(root, buf)
     local start_row, start_col, end_row, end_col = root:range()
     logger.debug_node('latex', root, buf)
 
     local expressions = cache.expressions[value]
     if expressions == nil then
-        local raw_expression = vim.fn.system('latex2text', value)
+        local raw_expression = vim.fn.system(converter, value)
         local parsed_expressions = vim.split(vim.trim(raw_expression), '\n', { plain = true })
         expressions = vim.tbl_map(vim.trim, parsed_expressions)
         cache.expressions[value] = expressions

lua/render-markdown/handler/latex.lua

@@ -18,7 +18,7 @@ local function validate_treesitter()
     end
 
     local highlight = require('nvim-treesitter.configs').get_module('highlight')
-    if highlight.enable then
+    if highlight ~= nil and highlight.enable then
         vim.health.ok('treesitter highlights enabled')
     else
         vim.health.error('treesitter highlights not enabled')

lua/render-markdown/health.lua

@@ -50,6 +50,7 @@ local M = {}
 ---@field public max_file_size? number
 ---@field public markdown_query? string
 ---@field public inline_query? string
+---@field public latex_converter? string
 ---@field public log_level? 'debug'|'error'
 ---@field public file_types? string[]
 ---@field public render_modes? string[]
@@ -109,6 +110,8 @@ M.default_config = {
 
         (shortcut_link) @callout
     ]],
+    -- Executable used to convert latex formula to rendered unicode
+    latex_converter = 'latex2text',
     -- The level of logs to write to file: vim.fn.stdpath('state') .. '/render-markdown.log'
     -- Only intended to be used for plugin development / debugging
     log_level = 'error',

lua/render-markdown/init.lua

@@ -3,6 +3,16 @@ local state = require('render-markdown.state')
 -- Typically resolves to ~/.local/state/nvim/render-markdown.log
 local log_file = vim.fn.stdpath('state') .. '/render-markdown.log'
 
+---@param message any
+---@return string
+local function convert_message(message)
+    if type(message) == 'string' then
+        return message
+    else
+        return vim.inspect(message)
+    end
+end
+
 ---@class render.md.LogEntry
 ---@field date string
 ---@field level string
@@ -26,7 +36,7 @@ log.add = function(level, message)
         ---@diagnostic disable-next-line: assign-type-mismatch
         date = os.date('%Y-%m-%d %H:%M:%S'),
         level = string.upper(level),
-        message = vim.inspect(message),
+        message = convert_message(message),
     }
     table.insert(log.entries, entry)
 end

lua/render-markdown/logger.lua

@@ -37,6 +37,7 @@
 ---@field public max_file_size number
 ---@field public markdown_query string
 ---@field public inline_query string
+---@field public latex_converter string
 ---@field public log_level 'debug'|'error'
 ---@field public file_types string[]
 ---@field public render_modes string[]

lua/render-markdown/types.lua

@@ -33,7 +33,7 @@ M.refresh = function(buf)
     parser:parse(true)
     parser:for_each_tree(function(tree, language_tree)
         local language = language_tree:lang()
-        logger.debug({ language = language })
+        logger.debug('language: ' .. language)
         local user_handler = state.config.custom_handlers[language]
         if user_handler == nil then
             if language == 'markdown' then