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TikZ/external：LaTeX 错误：缺少 \begin{document}

tag-icon • tag-icon tikz-pgf errors tikz-external externalize
TikZ/external：LaTeX 错误：缺少 \begin{document}

为什么我在外部构建的图像的missing \begin{document}日志文件中出现此错误？therect.logthrect.pdf

PS：很抱歉没有完全清理重复的包加载和不必要的包的代码。


\PassOptionsToPackage{table}{xcolor}
\PassOptionsToPackage{export}{adjustbox}

\begin{filecontents*}[overwrite]{rect.tikz}
    \begin{tikzpicture}[x=1em, y=1em,blue]
        \draw (0,0) rectangle node{Diaa} (4,4);
    \end{tikzpicture}
\end{filecontents*}

\documentclass[
addpoints,
%answers
]{exam}

\usepackage{catchfile,lipsum,graphbox,array,ragged2e,booktabs,fmtcount,multicol,multirow,calc,tikz}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

% https://topanswers.xyz/tex?q=1562#a1814
\makeatletter
\def\tikz@external@watch@store@aux#1#2{%
    \immediate\write\@mainaux{\string\expandafter\xdef\noexpand\csname pgfk@/tikz/external/watch/stored/#1\string\endcsname{#2}}}%
\def\tikz@external@watch@get@from@aux#1#2{%
    \ifcsname pgfk@/tikz/external/watch/stored/#1\endcsname
    \edef#2{\csname pgfk@/tikz/external/watch/stored/#1\endcsname}%
    \else
    \edef#2{0}%
    \fi}
\tikzset{external/watch/.cd,store/.code 2 args={%
        \tikz@external@watch@store@aux{#1}{#2}},
    get/.code 2 args={\tikz@external@watch@get@from@aux{#1}{#2}},
    font size/.code={\tikzset{external/watch/get={font size}{\pgfutil@tempa},
            external/watch/store={font size}{\f@size}}%
        \unless\ifnum\pgfutil@tempa=\f@size
        \tikzset{/tikz/external/force remake}%
        \fi
}}
\makeatother

\usetikzlibrary{external}
% https://tex.stackexchange.com/a/482560/2288
% https://topanswers.xyz/transcript?room=1605&id=85129#c85129
% https://tex.stackexchange.com/q/576077/2288
\NewDocumentCommand{\inputtikz}{ m m }{%
    \IfFileExists{#1}{%
        \tikzset{external/export=true}%
        \tikzsetnextfilename{#2}%
        \input{#1}%
        \tikzset{external/export=false}%
    }{% https://tex.stackexchange.com/a/383190/2288
        \typeout{Error: Missing file: #1}
        \ExitDueToUndefinedControlSequence%
    }%
}

\usepackage[american,siunitx]{circuitikz}
\usetikzlibrary{arrows, shapes, calc, positioning, patterns, decorations, decorations.markings, quotes, fpu, patterns, decorations.pathmorphing}

% for DC Motor Circuit Drawing
\tikzset{rotarrow/.pic={
        \draw[thin,->] (-0.2,-0.2)  to [out=-60,in=60, looseness=4] ++(0,0.4) node [above=1mm] {\tikzpictext};
    },
}


\usepackage[xparse,breakable,raster,skins]{tcolorbox}% xparse,breakable
\tcbset{shield externalize}
\tcbuselibrary{fitting}

%https://tex.stackexchange.com/a/331068/2288
\newcommand\blankpage{%
    \clearpage
    \begingroup
    \null
    \thispagestyle{empty}%
    \addtocounter{page}{-1}%
    \hypersetup{pageanchor=false}%
    \clearpage
    \endgroup
}

\setlength{\parindent}{0cm}

\tikzexternalize
\begin{document}
% https://topanswers.xyz/transcript?room=1605&id=85129#c85129
\tikzset{external/.cd, 
    watch/font size, 
    export = false,
}


\inputtikz{rect.tikz}{therect}

\end{document}

答案1

此错误是由于主文档的文件名中有空格而导致的。

此外，在处理外部库时，空格是如此臭名昭著和具有爆炸性（当用于、、文件tikz的名称时），并且会出现完全无法理解的错误，就像我的问题中的那样。main file\tikzsetnextfilename*.tikz

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