No (recursive) diagnostic for nested files using subimport

[GTM52]

Hello, I am currently using texlab in neovim and it works well, but when I use import package to nest my files, I cannot get completion for \ref command. Here is a minimal example (download here):

.
├── main.tex
├── part 1
│   ├── chapter 1
│   │   ├── main.tex
│   │   └── section 1.tex
│   └── main.tex
└── part 2
    ├── chapter 2
    │   ├── main.tex
    │   └── section 2.tex
    └── main.tex

I use import package to input files in part 1, and input for part 2.

% main.tex
\documentclass{book}
\usepackage{import}
\begin{document}
\subincludefrom{part 1}{main}
\include{part 2/main}
\end{document}
% part 1/main.tex
\part{1}
\label{part 1}
\subimport{chapter 1}{main}
% part 1/chapter 1/main.tex
\chapter{1}
\label{chapter 1}
\subimport{./}{section 1}
%\subimport{}{section 1}
% part 1/chapter 1/section 1.tex
\section{1}
\label{section 1}
% part 2/main.tex
\part{2}
\label{part 2}
\input{part 2/chapter 2/main}
% part 2/chapter 2/main.tex
\chapter{2}
\label{chapter 2}
\input{part 2/chapter 2/section 2}
% part 2/chapter 2/section 2.tex
\section{2}
\label{section 2}

There are two problems:

1. I cannot get completion for (deeper) labels in part 1 when I use \ref:
   
   
2. In part 1/chapter 1/main.tex, the command \subimport{./}{section 1} gives a completion for \ref,
   
   while \subimport{}{section 1} does not:
   

Thanks for your help!

[pfoerster]

@GTM52 Thanks for the very detailed report! 321fa26 should fix this issue.