Insert a tex file pdf inside another tex file dynamically

Question

Suppose that both tex1.tex and tex2.tex are two independent tex files in the sense that both compile and generate a pdf file independently. I would like to include the output of tex2.tex in the tex1.tex dynamically. I want to achieve this with one step of just compiling tex1.tex file ( and latex automatically do the second compile as a prerequisite step if I have referred to its result)

My Question: Is there any mechanism (like some instruction that can be added to tex1.tex) telling latex that when I am compiling tex1.tex it should first compile tex2.tex to its corresponding pdf, and then compile tex1.tex document with the tex2.pdf file included as a picture inside it.

Update:

I am adding example files for tex1.tex and tex2.tex to make the question more concrete: suppose my tex1.tex is as bellow:

\documentclass[11pt]{beamer}
\usetheme{default}

\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}

\author{Qartal}
\title{Inserting output of a tex file as pdf in one step}


\begin{document}
    \maketitle

    \begin{frame}
        \frametitle{}
        I want to inset bellow this line my diagram from file (tex2.tex):
    \end{frame}
\end{document}

I want to inset bellow this line my diagram from file (tex2.tex):


\end{document}

and my tex2.tex file is as bellow:

% TikZ chains with labeled edges
% Author: Stefan Kottwitz , http://texblog.net
\documentclass[a4paper,10pt]{article}
\usepackage{tikz}
%%%<
\usepackage{verbatim}
\usepackage[active,tightpage]{preview}
\PreviewEnvironment{tikzpicture}
\setlength\PreviewBorder{5pt}%
%%%>
\usetikzlibrary{arrows,chains,matrix,positioning,scopes}
%
\makeatletter
\tikzset{join/.code=\tikzset{after node path={%
\ifx\tikzchainprevious\pgfutil@empty\else(\tikzchainprevious)%
edge[every join]#1(\tikzchaincurrent)\fi}}}
\makeatother
%
\tikzset{>=stealth',every on chain/.append style={join},
         every join/.style={->}}
\tikzstyle{labeled}=[execute at begin node=$\scriptstyle,
   execute at end node=$]
%
\begin{document}
\begin{tikzpicture}
  \matrix (m) [matrix of math nodes, row sep=3em, column sep=3em]
    { 0 & A  & B  & C  & 0 \\
      0 & A' & B' & C' & 0 \\ };
  { [start chain] \chainin (m-1-1);
    \chainin (m-1-2);
    { [start branch=A] \chainin (m-2-2)
        [join={node[right,labeled] {\eta_1}}];}
    \chainin (m-1-3) [join={node[above,labeled] {\varphi}}];
    { [start branch=B] \chainin (m-2-3)
        [join={node[right,labeled] {\eta_2}}];}
    \chainin (m-1-4) [join={node[above,labeled] {\psi}}];
    { [start branch=C] \chainin (m-2-4)
        [join={node[right,labeled] {\eta_3}}];}
    \chainin (m-1-5); }
  { [start chain] \chainin (m-2-1);
    \chainin (m-2-2);
    \chainin (m-2-3) [join={node[above,labeled] {\varphi'}}];
    \chainin (m-2-4) [join={node[above,labeled] {\psi'}}];
    \chainin (m-2-5); }
\end{tikzpicture}
\end{document}

Answer 1

Perhaps this is what you want: Use bashful package, which allows the execution of shell commands or external programs (I can test this only on Linux right now)

The external program(s)/commands must be 'enclosed' in a

\bash
...
\END

pair.

Note: The compilation of the 2nd file is done each time when the outer wrapper document is compiled.

tex1.tex

\documentclass{article}

\usepackage{pdfpages}
\usepackage{bashful}
\begin{document}

\bash[stderr]
pdflatex tex2ext
\END

\includepdf{tex2ext.pdf}



\end{document}

tex2ext.tex

\documentclass{article}

\usepackage{blindtext}
\begin{document}
\blindtext[2]


\end{document}

Answer 2

Looks like a job for shell escape (\write18):

\documentclass{article}
\begin{filecontents*}{\jobname2.tex}
\documentclass{article}
\usepackage{blindtext}
\begin{document}
\blindtext[2]
\end{document}
\end{filecontents*}
\usepackage{pdfpages}
\immediate\write18{pdflatex \jobname2}
\begin{document}
\includepdf{\jobname2.pdf}
\end{document}

I've used the same demo files as Christian Hupfer's answer but have run them together (using the filecontents environment) to make things a little smoother.

To get this to work you'll need to allow shell escape, so

pdflatex --shell-escape <filename>

at the command line or the equivalent in your editor. Note that there is a security risk with \write18 as in theory any instruction could be passed by a third-party file.