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-rw-r--r--runtime/lua/vim/filetype.lua10
1 files changed, 9 insertions, 1 deletions
diff --git a/runtime/lua/vim/filetype.lua b/runtime/lua/vim/filetype.lua
index 872106b20d..99c98764dd 100644
--- a/runtime/lua/vim/filetype.lua
+++ b/runtime/lua/vim/filetype.lua
@@ -2489,7 +2489,15 @@ function M.match(args)
-- Finally, check file contents
if contents or bufnr then
- contents = contents or M.getlines(bufnr)
+ if contents == nil then
+ if api.nvim_buf_line_count(bufnr) > 101 then
+ -- only need first 100 and last line for current checks
+ contents = M.getlines(bufnr, 1, 100)
+ contents[#contents + 1] = M.getlines(bufnr, -1)
+ else
+ contents = M.getlines(bufnr)
+ end
+ end
-- If name is nil, catch any errors from the contents filetype detection function.
-- If the function tries to use the filename that is nil then it will fail,
-- but this enables checks which do not need a filename to still work.