在latex的编译中，eps文件不会主动转换成pdf，造成的报错。
错误报告
Package pdftex.def: File `xx-eps-converted-to.pdf' not found: using draft setting.
解决方案
在setting.json的文件里添加 “–shell-escape”,
"latex-workshop.latex.tools": [{"name": "latexmk","command": "latexmk","args": ["-synctex=1","-interaction=nonstopmode","-file-line-error","--shell-escape","-pdf","%DOC%"]}, {"name": "xelatex","command": "xelatex","args": ["-synctex=1","-interaction=nonstopmode","-file-line-error","%DOC%"]}, {"name": "pdflatex","command": "pdflatex","args": ["--shell-escape","-synctex=1","-interaction=nonstopmode","-file-line-error","%DOC%"]},