How to generate flowchart using Golang

Go language (Golang) is becoming more and more popular in today's market because it is a modern, efficient and safe programming language. In software development, flowcharts are very important tools. It can express the structure and flow of a program, help programmers better understand the program, and also allow team members to collaborate better. In this article, we will introduce how to generate flowcharts using Golang.

1. Install graphviz

Graphviz is an open source flowchart drawing tool that supports multiple output formats, including PNG, PDF, SVG, etc. First, we need to install graphviz.

On Linux systems, you can use the following command to install:

sudo apt-get install graphviz

On macOS, you can use the following commands to install:

brew install graphviz

On Windows, you can install it from the official website Download the msi file to install.

2. Install gotree

gotree is a tool based on Go language, which can convert the directory structure of a program into a tree structure diagram and generate dot files. , that is, a file in Graphviz format. Therefore, we need to install gotree first.

On Linux systems, you can use the following command to install:

go get github.com/disintegration/gotree/cmd/gotree

On macOS, you can use the following command to install:

brew install disintegration/gotree/gotree

On Windows, you can install it from gotree Download the executable file from the official website and install it.

3. Use gotree to generate dot files

Next, we need to use gotree to generate dot files. Suppose we have a program named "myprog" with the following directory structure:

myprog/
|-- main.go
|-- package1/
|   |-- file1.go
|   |-- file2.go
|-- package2/
|   |-- file3.go
|   |-- file4.go

We can run the following command in the terminal:

gotree -f dot -p myprog -o myprog.dot

This command will generate a program named "myprog. dot" file, its content is a text file in Graphviz format, which contains a tree diagram of our program directory structure.

4. Use Graphviz to generate flow charts

Finally, we use Graphviz to convert the dot file into a flow chart. We can use the following command:

dot -Tpng myprog.dot -o myprog.png

This command will generate a file named "myprog.png", which is a PNG format picture that contains the flow chart of our program.

Summary

This article introduces how to use Golang to generate flow charts. We need to install graphviz first, then install gotree, use gotree to generate dot files, and finally use Graphviz to convert the dot files into flow charts. These steps can help us better understand the structure and flow of the program, and can also help team members work better together.

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