[INNOVATUBE] Tech Talk #3: Golang - Takaaki Mizuno
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This document discusses using Golang for building command line tools. It introduces the speaker, Takaaki Mizuno, and his experience. It then discusses some common use cases for Golang, including web services, mobile apps, daemons/services, and command line tools. It asks which language is commonly used for command line tools and argues that Golang is a good choice. Benefits of Golang for command line tools include producing a single binary, being cross-platform, having no runtime dependencies, and supporting concurrency. Many famous command line tools like Docker are written in Golang. The document demonstrates using the gcli tool to generate a skeleton for a Golang command line tool. It provides some tips for
![Use “godep”
https://github.com/tools/godep
It generates “Godeps.json” file which stores library versions.
Use “godep get” to restore libraries.
“godep go build” uses Godeps libraries
{
"ImportPath": "github.com/takaaki-mizuno/awesomecommand",
"GoVersion": "go1.6",
"Deps": [
{
"ImportPath": "github.com/codegangsta/cli",
"Comment": "1.2.0-237-g71f57d3",
"Rev": "71f57d300dd6a780ac1856c005c4b518cfd498ec"
}
]
}](https://image.slidesharecdn.com/golangcommandline-160414085530/85/INNOVATUBE-Tech-Talk-3-Golang-Takaaki-Mizuno-22-320.jpg)
[INNOVATUBE] Tech Talk #3: Golang - Takaaki Mizuno
- 1. Building Command Line Tools with Golang Takaaki Mizuno
- 2. Who Am I Takaaki Mizuno CEO of Innovatube Solutions 19 years experience as software developer 34 years experience in coding Still coding Based in Singapore Japanese born in Japan Published 20+ technical books in Japan
- 4. Golang Use Cases Web Services Mobile Applications ( Android / iOS ) Command Line Tools
- 5. Golang at Innovatube We selected 2 primary languages for web back-end development. PHP Golang Golang is used for non-HTML-Heavy Web development API Server for Mobile Apps Use React on Frontend and backend system only returns structured data such as JSON
- 6. Golang Use Cases Web Services Mobile Applications ( Android / iOS ) Daemon / Service Command Line Tools
- 7. Golang Use Cases Web Services Mobile Applications ( Android / iOS ) Daemon / Service Command Line Tools
- 8. Golang and Command Line Tools
- 9. Which Language Are You Using For Writing Command Line Tools ? Node.js Java Python Ruby C++ Golang
- 10. Which Language Are You Using For Writing Command Line Tools ? Node.js Java Python Ruby C++ Golang
- 11. Which language should we use for command line tools? It depends on the use case of the tool. If the tool is dedicated for specific languages/framework, use that languages. Ruby for rubygems PHP for composer Node.js for front-end task runners ( gulp / grunt ) It the tool is a part of a project, you should use same language Java for Java project Python for Python project Other cases Use Golang
- 12. Benefit for Command Line Tools Single Binary Cross Platform ( Can support Windows easily ) No run-time dependencies Concurrency
- 13. Many famous “command line” tools are written in Golang docker Terraform ( By Hashicorp) hub ( by GitHub )
- 14. Write command line tools in Golang
- 15. Many Libraries You Can Use Standard CLI Libraries for building standard or basic Command Line applications cli - A feature-rich and easy to use command-line package based on golang tag cli-init - The easy way to start building Golang command line application. climax - An alternative CLI with "human face", in spirit of Go command cobra - A Commander for modern Go CLI interactions codegangsta/cli - A small package for building command line apps in Go. docopt.go - A command-line arguments parser that will make you smile. go-flags - go command line option parser kingpin - A command line and flag parser supporting sub commands. liner - A Go readline-like library for command-line interfaces. mitchellh/cli - A Go library for implementing command-line interfaces. mow.cli - A Go library for building CLI applications with sophisticated flag and argument parsing and validation. From: Awesome-go ( https://github.com/avelino/awesome-go#command-line )
- 16. You can use “gcli” It generates a skeleton (codes and its directory structure) you need to start building Command Line Interface (CLI) tool https://github.com/tcnksm/gcli
- 17. Easy To Use gcli new -command=init -command=get -owner=takaaki-mizuno awesomecommand % awesomecommand init
- 18. DEMO
- 19. Support 4 CLI libraries +-----------------+---------+-----------------------------------------------------+ | NAME | COMMAND | URL | +-----------------+---------+-----------------------------------------------------+ | mitchellh_cli | * | https://github.com/mitchellh/cli | | codegangsta_cli | * | https://github.com/codegangsta/cli | | go_cmd | * | https://github.com/golang/go/tree/master/src/cmd/go | | flag | | https://golang.org/pkg/flag/ | +-----------------+---------+-----------------------------------------------------+ % gcli list
- 20. Some Tips For Golang ( command line tools )
- 21. Library Dependency Library version dependency might become problems on team development / source code distribution. Only using “go get” cannot manage library versions.
- 22. Use “godep” https://github.com/tools/godep It generates “Godeps.json” file which stores library versions. Use “godep get” to restore libraries. “godep go build” uses Godeps libraries { "ImportPath": "github.com/takaaki-mizuno/awesomecommand", "GoVersion": "go1.6", "Deps": [ { "ImportPath": "github.com/codegangsta/cli", "Comment": "1.2.0-237-g71f57d3", "Rev": "71f57d300dd6a780ac1856c005c4b518cfd498ec" } ] }
- 23. Colorize UI mgutz/ansi Make UI Colorize mattn/go-colorable Wrap io.Writer to Support Windows DOS Console
- 24. Building Dashboard gizak/termui Can build Text Base Dashboard with GUI Building- Like APIs
- 25. Happy Coding!
- 26. Q & A