What is Go Callvis?

Go-callvis is a golang code visualization tool used to help visualize the call graph of Go programs using interactive views. Install the command "go get -u github.com/ofabry/go-callvis". The purpose of the Go-callvis tool is to provide developers with a visual overview of a Go program, using data from the call graph and its relationship to packages and types.

The operating environment of this tutorial: Windows 7 system, GO version 1.18, Dell G3 computer.

1. Introduction to go-callvis

Go-callvis is a golang code visualization tool used to help use interactive View visualizes the call graph of a Go program. The purpose of this tool is to provide developers with a visual overview of a Go program, using data from the call graph and its relationship to packages and types. This is especially useful in larger projects where the code complexity is much higher, or when simply trying to understand other people's code.

Features

• Support specific focus packages in go mod

##Click on a package to quickly switch focus using the interactive viewer
Group functions by package and/or method by type
Filter packages to a specific import path prefix
Ignore functions in the standard library
Omit various types of function calls

2. Running dependencies

Go 1.13

• Graphviz (optional, required only with -graphviz flag)

3. Install

go get -u github.com/ofabry/go-callvis

or

git clone https://www.php.cn/link/bb2a2fcd8984d12d9efcfcd75a7f7b38.gitcd go-callvismake install

installed go -callvis executable file will be in the $GOPATH/bin directory

4. How to use

Run

go- callvis -h
• can list all supported options, as follows

  Usage of go-callvis:
    -debug
      	Enable verbose log.
      	输出详细日志
    -file string
      	output filename - omit to use server mode
      	以文件新式输出结果，并将忽略server交互模式
    -cacheDir string
      	Enable caching to avoid unnecessary re-rendering.
      	启用缓存以避免不必要的重新渲染。
    -focus string
      	Focus specific package using name or import path. (default "main")
      	关注特定的程序包，默认为“main”包
    -format string
      	output file format [svg | png | jpg | ...] (default "svg")
      	输出文件的格式，[svg | png | jpg | ...]，默认为svg
    -graphviz
      	Use Graphviz's dot program to render images.
      	使用Graphviz渲染图像
    -group string
      	Grouping functions by packages and/or types [pkg, type] (separated by comma) (default "pkg")
      	分组功能，根据包 与/或 类型分组 [pkg, type] (用逗号分开) (默认 "pkg")，例如 -group pkg,type
    -http string
      	HTTP service address. (default ":7878")
          HTTP 服务地址 (默认 ":7878")
    -ignore string
      	Ignore package paths containing given prefixes (separated by comma)
          忽略包含给定前缀的包路径(用逗号分开)
    -include string
      	Include package paths with given prefixes (separated by comma)
          包含具有给定前缀的包路径 (用逗号分开)
    -limit string
      	Limit package paths to given prefixes (separated by comma)
      	将包路径限制为给定的前缀（以逗号分隔）
    -minlen uint
      	Minimum edge length (for wider output). (default 2)
          最小边长（用于更宽的输出）。 （默认2）
    -nodesep float
      	Minimum space between two adjacent nodes in the same rank (for taller output). (default 0.35)
          同一等级中两个相邻节点之间的最小间距（用于更高的输出）。 （默认0.35）
    -nointer
      	Omit calls to unexported functions.
      	忽略对未导出函数的调用。(忽略首字母小写的函数)
    -nostd
      	Omit calls to/from packages in standard library.
          忽略标准库的调用
    -skipbrowser
      	Skip opening browser.
          跳过打开浏览器
    -tags build tags
      	a list of build tags to consider satisfied during the build. For more information about build tags, see the description of build constraints in the documentation for the go/build package
          在构建期间更适合的构建标记
          有关构建标记的更多信息，请参阅go / build软件包的文档中的构建约束说明。
    -tests
      	Include test code.
          包含测试代码
    -version
      	Show version and exit.
          显示版本号

Command line format:

go-callvis [optional parameters]
• By default, the output image is at
http://localhost:7878/
• , which can be changed using the option -http="ADDR:PORT" HTTP server address. Static output:
• To generate a single output file, use option
  -file=
  • to select the output file target. The output format defaults to svg, use the option
  -format=
  • to select other output formats.
  Usage example:
• Resolve main package
  go-callvis -skipbrowser -nostd ./
  • Resolve testPkg package
  go-callvis -group pkg,type -focus testPkg github.com/Project specific path

##5. Rendering Description

Specification Description

[Related recommendations: Go Video tutorial

、

Programming teaching】

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