有没有办法传递这些字符串：
\let\includegraphicsbak\includegraphics
\renewcommand*{\includegraphics}[2][]{\fbox{\includegraphicsbak[#1]{#2}}}
通过命令行？
我试过：
latex "\let\includegraphicsbak\includegraphics \renewcommand*{\includegraphics}[2][]{\fbox{\includegraphicsbak[#1]{#2}}} \input{myfile.tex}"
但显然，它不起作用，因为编译器抱怨“\includegraphics未定义”（此时）。有什么办法可以解决这个问题吗？
答案1
您可以使用以下方法来延迟重新定义\AtBeginDocument{....}：
latex "\AtBeginDocument{\let\includegraphicsbak\includegraphics \renewcommand*{\includegraphics}[2][]{\fbox{\includegraphicsbak[#1]{#2}}}} \input{myfile.tex}"