markdown文档很多时候要流程图，不用图片，用字符就可以显示，如：
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| +--------+ request +--------+
| client | ---------> | server |
+--------+ +--------+
|
那么如何画这种图？
Easy DSL的语法描述图像
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| $ apt-get install libgraph-easy-perl
$
$ graph-easy <<< '[ client ] - request -> [ server ]'
+--------+ request +--------+
| client | ---------> | server |
+--------+ +--------+
$
$
$
$ vim simple.txt
[ A ], [ B ], [ C ] --> [ D ]
$
$ graph-easy simple.txt
+---+ +---+ +---+
| A | --> | D | <-- | C |
+---+ +---+ +---+
^
|
|
+---+
| B |
+---+
|
Easy DSL的语法
Easy DSL的语法
图形工具
此 asciiflow 网站提供在线画图。