Error when both width and height are specified without pgfplots package loaded

[user202729]

if tikz package is loaded without pgfplots package, and both width and height are specified in \includegraphics command, an error happens:

./a.tex:6: Undefined control sequence.
\tikzscale@preparePlot code ->\pgfplotsset
                                           {every axis/.append style={width=...

An example document:

\documentclass{article}
\usepackage{tikz}
\usepackage{tikzscale}
\begin{document}
\includegraphics[width=3cm, height=3cm]{image.tikz}
\end{document}

Where image.tikz contains:

\begin{tikzpicture}
\draw (0, 0) -- (1, 2);
\end{tikzpicture}

I think the desirable behavior here would be that the image is resized so that the width is at most 3cm and the height is at most 3cm, whichever is smaller.

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Apart from that, do you have any plan to support inline tikzpicture environments?

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Also, I think it's undesirable for the package to implicitly handle in addition relative import, that feels like the job of a separate package to me. The import package already handles that.STPH-FP