是否可以在 dot2tex 节点中使用“verbatim”环境？

Question

是否可以使用 verbatim 环境（\begin{verbatim}...\end{verbatim}即dot2tex节点？如果是，您能否提供 MWE？

---

更新：这是目前为止我得到的最接近的更新：

digraph g {
d2tdocpreamble = "\usepackage{varwidth} \usepackage{verbatim} \renewcommand{\familydefault}{\sfdefault}";
graph [ rankdir = "TB" ];
node  [ style="rounded,bold,filled" fillcolor="azure" shape = "box" ];

assume_git         [ texlbl="\begin{varwidth}{30em}We'll assume that Git is to be used for source control; so as a precaution against accidentally checking in temporary files used by Vim or OS X, enter the following at the command prompt:\\\verb|echo '*.swp'      >> .gitignore|\\\verb|echo '.DS\_Store'  >> .gitignore|\end{varwidth}" ];

START              -> assume_git;
}

这是通过命令将其转换为 PDF 的输出dot2tex --crop --margin 1em --autosize dot2tex_test_006_mwe.dot > dot2tex_test_006_mwe.tex; pdflatex dot2tex_test_006_mwe.tex：

这至少在两个方面令人不满意：

1. 代替

   \\\verb|echo '*.swp'      >> .gitignore|\\\verb|echo '.DS\_Store'  >> .gitignore|
   

   我更希望能够使用

   \begin{verbatim}
   echo '*.swp'      >> .gitignore
   echo '.DS_Store'  >> .gitignore
   \end{verbatim}
   

   以避免代码块中每个换行符都需要不必要的标记，但后者产生了以下错误：

   ERROR    Failed to process input
   Traceback (most recent call last):
     File "build/bdist.macosx-10.6-universal/egg/dot2tex/dot2tex.py", line 2928, in main
       s =  conv.convert(dotdata)
     File "build/bdist.macosx-10.6-universal/egg/dot2tex/dot2tex.py", line 794, in convert
       return self.do_preview_preproc()
     File "build/bdist.macosx-10.6-universal/egg/dot2tex/dot2tex.py", line 1105, in do_preview_preproc
       hp,dp,wt = pp.texdims[name]
   KeyError: 'assume_git'
   This is pdfTeX, Version 3.1415926-2.3-1.40.12 (TeX Live 2011/MacPorts 2011_5) restricted \write18 enabled.
   entering extended mode
   (./dot2tex_test_006_mwe.tex
   LaTeX2e <2009/09/24>
   Babel <v3.8l> and hyphenation patterns for english, dumylang, nohyphenation, czech, slovak, dutch, ukenglish, usenglishmax, basque, french, german-x-2009-06-19, ngerman-x-2009-06-19, german, ngerman, swissgerman, italian, polish, portuguese, spanish, catalan, galician, loaded.
   )
   *
   

2. MWE 中的方法\\\verb|...|不会逐字呈现代码。即使我的简短示例也存在以下问题：

   • 为了避免出现错误消息，我不得不在下划线前面添加一个反斜杠，但现在反斜杠被渲染了。所以我需要一种方法来渲染只是下划线；
   • *.swp和周围的直单引号.DS\_Store已被右单引号取代；
   • 每对大于号中的一个成员已经消失。

Answer 1

无论我添加什么文本，我都无法获得圆形。

然而，解决方案是使用更多线路。

digraph g {
d2tdocpreamble = "
  \usepackage{varwidth}
  \usepackage{verbatim}
  \usepackage{upquote}
  \renewcommand{\familydefault}{\sfdefault}
";
graph [ rankdir = "TB" ];
node  [ style=rounded, fillcolor=azure];

assume_git [ texlbl="\begin{varwidth}{30em}
  We'll assume that Git is to be used for source control; so as a precaution against
  accidentally checking in temporary files used by Vim or OS X, enter the following
  at the command prompt:
  \begin{verbatim}
  echo '*.swp'      >> .gitignore
  echo '.DS\_Store'  >> .gitignore
  \end{verbatim}
  \end{varwidth}"
 ];

START              -> assume_git;
}