Nested TOC from included file using \includepdf possible?

Question

I am inserting my CV (using moderncv) into my set of application documents. The CV is a separate project and I'm using \includepdf to insert the resulting pdf into my main document. This is the contents of my tex file that handles the CV:

\pagebreak
\begin{textblock*}{60mm}(20mm,0.01\textheight)
    \color{white}{\section{Curriculum vitae}[Curriculum vitae]*}
\end{textblock*}
\includepdf[pages={1-7}, addtotoc={},scale=1,pagecommand={}]{cv_eng.pdf}
\pagebreak

Here is an overview of the structure of my documents:

*
|
+---Cover
|
+---ToC
|
+---Cover letter
|
+---CV
|
+---Work references
|
+---Diplomas and certificates

All sections (yes, sections) are added to the main structure using \input and are separate tex files. All (except for the cover and ToC) contains simple inclusion with some formatting (e.g. scaling) using \includepdf. All but the CV section have no ToC on their own.

CV
|
+---Education
|
+---Working experience
|
+---Soft skills
|
+---Technical experience
|
+---Activities

As I have discovered while the CV pdf file has its own ToC upon inserting it into my main document this ToC disappears. I was expecting for the ToC to be added as a nested one (e.g. a section becomes subsection and so on) but it's not added at all. Below is a mockup what I would like to have:

*
|
+---Cover
|
+---ToC
|
+---Cover letter
|
+---CV
|   |
|   |
|   +---Education
|   |
|   +---Working experience
|   |
|   +---Soft skills
|   |
|   +---Technical experience
|   |
|   +---Activities
|   
|
+---Work references
|
+---Diplomas and certificates

Any ideas how to solve this problem?

Answer 1

Pdfpages doesn't provide any magic which adds entries to the TOC automatically. It can be done manually with addtotoc, but I think it's quite unusual to have a TOC in your application documents. However, it is always nice to have a navigation bar (outlines in pdf jargon).

Here's an example how to add outlines which are linked to pages included with \includepdf.

\documentclass[a4paper]{article}
\usepackage{pdfpages}
\usepackage{bookmark}
\usepackage{mwe}

\newcommand{\mybookmark}[3][0]{%
  \hypertarget{#3}{}%
  \bookmark[dest=#3, level=#1]{#2}%
}

\newcommand{\mypdfbookmark}[3][0]{%
  \bookmark[dest=#3, level=#1]{#2}%
}

\begin{document}

\mybookmark{Cover Letter}{cover}
... cover letter here ...

\mypdfbookmark{CV}{CV.1}
\mypdfbookmark[1]{page 1}{CV.1}
\mypdfbookmark[1]{page 2}{CV.2}
\mypdfbookmark[1]{page 3}{CV.3}
\includepdf[pages=1-3, link, linkname=CV]{example-image-a4-numbered.pdf}

\mybookmark{End}{end}
.. the end ...
\end{document}