We want AWESOME CLI tool & development

Go Conference 2019 Spring
https://gocon.jp/2019-spring-sessions#h7-s-we-want-awesome-cli-tool--development

Transcript

1. We want AWESOME CLI tool & development Go Conference 2019 Spring @micnncim
2. $ whoami @micnncim @micnncim University Student (CS/B4) No Job (Welcome job opportunity!) Blog: https://micnncim.github.io/
3. CLI, UNIX, Go
5. A Quarter-Century of Unix (1994) Write programs that do one thing and do it well. Write programs to work together. Write programs to handle text streams, because that is a universal interface.
6. Why Go for CLI? ば ば
7. What component? ば Argument/Flag/(Subcommand) ば I/O (Standard Stream) ば Exit Code
8. What needed for awesome CLI? ば UX/DX ば ば ば ば
9. Design and Test CLI
10. Design & Test I/O ば fmt.Println() Testable ば io.Writer ば I/O interface
11. Design I/O
12. Test I/O
13. Design I/O
14. Design I/O From github/hub
15. Design I/O From mitchellh/cli
16. Test I/O ば bytes.Bu er
17. Handling Exit Code ば error Exit Code 0 ば Exit Code ば Exit Code error type
18. Handling Exit Code From github/hub
19. Test with golden files ば ( ) .golden ば API .golden
20. Test with golden files
21. Test with golden files ば testdata/expect.golden
22. Test with golden files
23. Cross Platform
24. Support Cross Platform ば Go Linux/macOS/Windows ば Utility
25. Pkgs for Cross Platform ば Home Directory: mitchellh/go-homedir ば Open ( | URL): skratchdot/open-golang ば Color: mattn/go-colorable
26. Pkgs for Cross Platform From mitchellh/go-homedir
27. Build & Release CLI
28. Build & Release ば $ go get potentially unstable, Go ば GitHub Release curl + tar + chmod? ば
29. Build & Release ば mitchellh/gox: ば tcnksm/ghr: ば goreleaser/goreleaser: , , etc.
30. GoReleaser ば YAML ば Homebrew ば CI easy
31. GoReleaser: Build ば YAML ば DX
32. GoReleaser: Changelog ば Changelog = UX
33. GoReleaser: Package Manager ば Formula ば DX ば UX
34. CI/CD ば tag push CI
35. CI/CD ば GoReleaser dead simple GoReleaser dead simple
36. Update ば ば CLI GUI ば rhysd/go-github-selfupdate tj/go-update
37. Auto Update
38. Document CLI
39. Documentation ば Go ( | ) ば ば ( )
40. Demo ば GIF? SVG? ば troublesome ば asciinema + (asciicast2gif | svg-term-cli)
41. Demo
42. Develop Rich CLI
43. Awesome CLI packages ば All in One ば Flag Parser ば Standard Stream ば Progress UI ば Con guration
44. All in One ば urfave/cli 10,714 ば spf13/cobra 11,958 ば mitchellh/cli 966 , , , etc.
45. All in One
46. Flag Parser ば alecthomas/kingpin 2,431 ば jessevdk/go- ags 1,458 , , ag/argument, ag parse
47. Flag Parser
48. Standard Stream ば manifoldco/promptui 2,803 ば AlecAivazis/survey 1,144 validation, Select, Con rm, Password UI UX Stdin UI Utility
49. Standard Stream
50. Progress UI ば cheggaaa/pb 1,878 ば gosuri/uiprogress 1,400 ば briandowns/spinner 734 I/O , Spinner UI
51. Progress UI
52. Configuration ば spf13/viper 8,467 JSON/TOML/YAML/HCL Con g , , Path
53. Example
54. micnncim/bitbrew ✔ Document, Demo
55. micnncim/bitbrew ✔
56. micnncim/bitbrew ✔
57. micnncim/bitbrew ✔ Testable I/O
58. micnncim/bitbrew ✔ Con g
59. micnncim/bitbrew ✔ Rich UI
60. micnncim/bitbrew ✔ Installation
61. See also ば golang/go ば hashicorp/consul, terraform, nomad, packer, etc.
62. @micnncim Thank you!