documentclass[a4paper, 10pt, oneside, fleqn, openright]{report}
usepackage[no-math]{fontspec}

usepackage{polyglossia}
setdefaultlanguage{french}
setotherlanguages{english}

newcommand{codeimg}{$vcenter{hbox{includegraphics[height=baselineskip]{example-image-a}}}$}

usepackage{calc}
usepackage[usenames,dvipsnames,svgnames,table]{xcolor}
usepackage{pdfpages,graphicx}
usepackage{mdframed}
usepackage{listings}
usepackage{filecontents}
definecolor{light-gray}{gray}{0.92}

definecolor{mainColor}{RGB}{211, 47, 47} % some dark red


usepackage{tcolorbox}
newcounter{data}
newcounter{result}
newcounter{pythoncode}
newcounter{matlab}
tcbuselibrary{skins,breakable,listings}
newtcblisting[use counter=lstlisting]{codeblock}[2][]{%
        enhanced,noparskip,breakable,colback=light-gray,colframe=DarkSlateGray,opacitybacktitle=.8,%
        fonttitle=bfseries,
        before upper={hspace*{-1em}codeimg~#2},%
        title after break={centeringfootnotesizeitshapestrutlstlistingname~thelstlisting~--~continued},%
        listing only,listing options={xleftmargin=-1mm},
        after upper={centeringstrutlstlistingname~thelstlisting:~#2},
        frame hidden,arc=0pt,outer arc=0pt,boxrule=0pt,frame code={draw[gray,line width=2mm] ([xshift=-0.5pt]frame.north west) -- ([xshift=-0.5pt]frame.south west);},#1}

newtcbinputlisting[use counter=matlab,list inside=matlab,number within=chapter]{inputmatlab}[3][]{%
        enhanced,noparskip,breakable,colback=light-gray,colframe=DarkSlateGray,opacitybacktitle=.8,%
        fonttitle=bfseries,before upper={hspace*{-1em}codeimg~#3},%
    title after break={centeringfootnotesizeitshapestrut Matlab Code~thematlab~--~continued},%
     listing only,listing options={xleftmargin=-1mm,#1,style=Matlab-editor,basicstyle=ttfamilyscriptsize},
     after upper={centeringstrut {bfseries Matlab Code~thematlab:}~#2},
     frame hidden,arc=0pt,outer arc=0pt,boxrule=0pt,
     %
     listing file={#3},#1}

usepackage[numbered,framed]{matlab-prettifier}

begin{filecontents*}{sol2_adx.m}
% create a file for output
!touch testFile.txt
fid = fopen('testFile.text', 'w')
for i=1:10
  fprintf(fid,'%6.2f n', i);
end
end{filecontents*}

begin{document}

inputmatlab{Expansion Algorithm}{sol2_adx.m}
end{document}

documentclass{article}

usepackage{matlab-prettifier}
usepackage{tcolorbox}
tcbuselibrary{listings}

% use filename@parse to strip the path from filename
% also allow underscore in filename
makeatletter
begingroup
catcode`_active
gdefstrippath#1{%
  filename@parse{#1}%
  begingroup
  catcode`_active
  let_textunderscore
  edeffname{filename@base .filename@ext}%
  scantokensexpandafter{fname}%
  endgroup
}
endgroup
makeatother

% simplified inputlisting definition
% note before upper uses strippath defined above
newtcbinputlisting{inputmatlab}[3][]{%
  before upper = textbf{strippath{#3}},
  listing only,
  listing options = {#1,style=Matlab-editor,basicstyle=ttfamily},
  listing file = {#3},
  #1}

begin{document}
inputmatlab{Expansion Algorithm}{subdir/sol2_adx.m}
end{document}