To implement the approach discussed here: Automatic detection of Overleaf for fallback images I wanted to give my tikz-files their own names, such that I can either include the tikz-file when compiling locally or the pdf-file when working on overleaf (which is significantly easier when knowing the file name of the PDF beforehand). Therefore, I included tikzsetnextfilename in my tikzfiles. Unfortunately, that seems to disable the scaling possibility given by includegraphics and tikzscale. As example, with two files main.tex and sub.tikz:
main.tex:
\documentclass{article}
\usepackage{standalone}
\usepackage{tikz}
\usetikzlibrary{external}
\usepackage{pgfplotstable}
\usepackage{pgfplots}
\usepackage{filecontents}
\usepackage{tikzscale}
\begin{filecontents*}{file1.dat}
x y
0 0
1 1
2 2
3 3
4 4
5 5
\end{filecontents*}
\usepackage{subcaption}
\tikzexternalize[prefix=tikz-cache/]
\tikzset{external/force remake}
\usetikzlibrary{pgfplots.groupplots}
\pgfplotsset{every axis/.append style={
label style={font=\footnotesize\bfseries},
tick label style={font=\footnotesize},
legend style={font=\footnotesize}
},
y axis/.append style={align=center}}
\tikzset{Line Label/.style={font=\footnotesize,scale=2}}
\newcommand{\figurefontsize}{\footnotesize}
\begin{document}
\begin{figure}[htpb]
\centering
\includegraphics[width=7\linewidth]{sub.tikz}
\caption{Image I}
\end{figure}
\end{document}
sub.tikz:
\pgfplotstableread{file1.dat}{\tablea}
\tikzsetnextfilename{sub}
\begin{tikzpicture}
\begin{axis}[
ymin=0, ymax=30,
xmin=0, xmax=5,
xlabel={$x$},
ylabel={$y$},
grid=major,
legend entries={\(y_1\),\(y_2\),\(y_1+y_2\)},
legend pos = north west
]
% Select appropriate columns
\addplot [blue, mark=*] table [x=x,y=y] {\tablea};
\end{axis}
\end{tikzpicture}
When disabling tikzsetnextfilename, scaling works, and the graph is scaled appropriately. Enabling it leads to a fixed scaling factor of 1, though, without any log errors or warnings. Is there a solution or an explanation (or possibly both)?
