Introduce

输出C/C++工程中所有源文件，头文件之间的依赖关系，参考test.py，会生成一个gv文件，然后使用下面的命令生成dot图

dot -Tpng -o <目标>.png <源>.gv

Reference

• python列表如何依次取2个元素？
• Python Patterns - Implementing Graphs
• Directed Acyclic Graph (DAG) Scheduler library
• pydags - A lightweight DAG framework for Python
• ‘hierarchical’ (or layered) drawings of directed graphs.
• Distance between edges and nodes in graphviz

TODO

• [] color for key node, for example the file contains main()
• [] matched header and source files use same color, for example, A.h and A.cpp use same color