fix: get filetype (#1258)

lua/avante/file_selector.lua

@@ -368,9 +368,9 @@ end
 function FileSelector:get_selected_files_contents()
   local contents = {}
   for _, file_path in ipairs(self.selected_filepaths) do
-    local lines, filetype, error = Utils.read_file_from_buf_or_disk(file_path)
+    local lines, error = Utils.read_file_from_buf_or_disk(file_path)
     lines = lines or {}
-    filetype = filetype or "unknown"
+    local filetype = Utils.get_filetype(file_path)
     if error ~= nil then
       Utils.error("error reading file: " .. error)
     else

lua/avante/repo_map.lua

@@ -29,21 +29,10 @@ end
 function RepoMap.setup() vim.defer_fn(RepoMap._init_repo_map_lib, 1000) end
 
 function RepoMap.get_ts_lang(filepath)
-  local filetype = RepoMap.get_filetype(filepath)
+  local filetype = Utils.get_filetype(filepath)
   return filetype_map[filetype] or filetype
 end
 
-function RepoMap.get_filetype(filepath)
-  -- Some files are sometimes not detected correctly when buffer is not included
-  -- https://github.com/neovim/neovim/issues/27265
-
-  local buf = vim.api.nvim_create_buf(false, true)
-  local filetype = vim.filetype.match({ filename = filepath, buf = buf })
-  vim.api.nvim_buf_delete(buf, { force = true })
-
-  return filetype
-end
-
 function RepoMap._build_repo_map(project_root, file_ext)
   local output = {}
   local gitignore_path = project_root .. "/.gitignore"
@@ -70,7 +59,7 @@ function RepoMap._build_repo_map(project_root, file_ext)
     if definitions == "" then return end
     table.insert(output, {
       path = Utils.relative_path(filepath),
-      lang = RepoMap.get_filetype(filepath),
+      lang = Utils.get_filetype(filepath),
       defs = definitions,
     })
   end)
@@ -142,7 +131,7 @@ function RepoMap._get_repo_map(file_ext)
       if not found then
         table.insert(repo_map, {
           path = Utils.relative_path(abs_filepath),
-          lang = RepoMap.get_filetype(abs_filepath),
+          lang = Utils.get_filetype(abs_filepath),
           defs = definitions,
         })
       end

lua/avante/sidebar.lua

@@ -337,8 +337,7 @@ local function transform_result_content(selected_files, result_content, prev_fil
       -- can happen if the llm tries to edit or create a file outside of it's context.
       if not match_filetype then
         local snippet_file_path = current_filepath or prev_filepath
-        local snippet_file_type = vim.filetype.match({ filename = snippet_file_path }) or "unknown"
-        match_filetype = snippet_file_type
+        match_filetype = Utils.get_filetype(snippet_file_path)
       end
 
       local search_start_tag_idx_in_transformed_lines = 0

lua/avante/utils/init.lua

@@ -890,9 +890,19 @@ function M.is_same_file(filepath_a, filepath_b) return M.uniform_path(filepath_a
 
 function M.trim_think_content(content) return content:gsub("^<think>.-</think>", "", 1) end
 
+function M.get_filetype(filepath)
+  -- Some files are sometimes not detected correctly when buffer is not included
+  -- https://github.com/neovim/neovim/issues/27265
+
+  local buf = vim.api.nvim_create_buf(false, true)
+  local filetype = vim.filetype.match({ filename = filepath, buf = buf })
+  vim.api.nvim_buf_delete(buf, { force = true })
+
+  return filetype
+end
+
 ---@param file_path string
 ---@return string[]|nil lines
----@return string|nil file_type
 ---@return string|nil error
 function M.read_file_from_buf_or_disk(file_path)
   --- Lookup if the file is loaded in a buffer
@@ -900,8 +910,7 @@ function M.read_file_from_buf_or_disk(file_path)
   if bufnr ~= -1 and vim.api.nvim_buf_is_loaded(bufnr) then
     -- If buffer exists and is loaded, get buffer content
     local lines = vim.api.nvim_buf_get_lines(bufnr, 0, -1, false)
-    local file_type = vim.api.nvim_get_option_value("filetype", { buf = bufnr })
-    return lines, file_type, nil
+    return lines, nil
   end
 
   -- Fallback: read file from disk
@@ -909,12 +918,10 @@ function M.read_file_from_buf_or_disk(file_path)
   if file then
     local content = file:read("*all")
     file:close()
-    -- Detect the file type using the specific file's content
-    local file_type = vim.filetype.match({ filename = file_path, contents = { content } }) or "unknown"
-    return vim.split(content, "\n"), file_type, nil
+    return vim.split(content, "\n"), nil
   else
     -- M.error("failed to open file: " .. file_path .. " with error: " .. open_err)
-    return {}, nil, open_err
+    return {}, open_err
   end
 end