绘制dot图

dot语言是一种使用代码描述各种图形关系的工具，通常需要安装Graphviz。
有两种方法使用dot语言：使用Graphviz，使用plantuml。

• 使用Graphviz
  Graphviz一般是在linux下面运行命令
• 使用plantUML
  PlantUml中使用Graphviz/DOT需要以"@startuml"开头，以"@enduml"结束。
  可以通过在线PlantUml网站来绘制，非常方便，就避免了在linux下输入命令

PlantUml中使用dot的例子：

@startdot
digraph graph_name {
    shape1 [shape=box, label="矩形 "];
    shape3 [shape=ellipse, label="椭圆 "];
    shape5 [shape="diamond", label="菱形 "];
    
    shape1:s -> shape3
    shape3 -> shape5
}
@enddot

下面绘制一个Gitflow的开发流程：

@startdot
digraph gitflow_workflow {
        "开始" [shape="box"]
        "开始" -> "新的Feature还是新的Bug?"

        "新的Feature还是新的Bug?" [shape="diamond"]
        "新的Feature还是新的Bug?" -> "从dev分支创建Feat-xxx分支" [label = "新Feature"]
        "新的Feature还是新的Bug?" -> "从master中fork分支fixbug-xxx" [label = "新bug"]

        "从master中fork分支fixbug-xxx" [shape="box"]
        "从master中fork分支fixbug-xxx"  -> "在分支fixbug-xxx中修改bug" [label=""]

        "在分支fixbug-xxx中修改bug" [shape="box"]
        "在分支fixbug-xxx中修改bug" -> "分支fixbug-xxx合并到master" [label="bug修改完成"]
        "在分支fixbug-xxx中修改bug" -> "分支fixbug-xxx合并到develop" [label="bug修改完成"]

        "分支fixbug-xxx合并到master" [shape="box"]
        "分支fixbug-xxx合并到master" -> "master分支版本增加" [label=""]

        "分支fixbug-xxx合并到develop" [shape="box"]
        "分支fixbug-xxx合并到develop" -> "完成"

        "master分支版本增加" [shape="box"]
        "master分支版本增加" ->  "完成"
        "完成" [shape="box"]

        "从dev分支创建Feat-xxx分支" [shape="box"]
        "从dev分支创建Feat-xxx分支" -> "开发Feat-xxx分支" [label=""]

        "开发Feat-xxx分支" [shape="box"]
        "开发Feat-xxx分支" -> "合并Feat-xxx分支到dev分支" [label="新特点完成"]
        "合并Feat-xxx分支到dev分支" [shape="box"]
        "合并Feat-xxx分支到dev分支" -> "从dev分支创建release分支"
        "从dev分支创建release分支" [shape="box"]
        "从dev分支创建release分支" -> "release分支新版本发布"

        "release分支新版本发布" [shape="box"]
        "release分支新版本发布" -> "release分支合并到master分支"
        "release分支新版本发布" -> "release分支合并到dev分支"

        "release分支合并到master分支" [shape="box"]
        "release分支合并到master分支" -> "完成"
        "release分支合并到dev分支" [shape="box"]
        "release分支合并到dev分支"  -> "完成"
}
@enddot

结果是这样的：