[TOC] Survey 用于在支持 `ANSI` 轉義序列的終端上構建交互式且可訪問的提示。 使用 `Golang` 編寫命令時，有交互部分使用這個庫會覺得上檔次且能夠得到很友好的提示。交互部分提供有好幾種方式。 交互模式有 `Input` 、 `Multiline` 、 `Password` 、 `Confirm` 、 `Select` 、 `MultiSelect` 和 `Editor` 。 下面演示每種模式示例 ## Input 交互輸入的內容保存到變量中，但不能保存多個多行內容。因為回車就標識交互輸入結束 代碼示例 ```go package main import ( "fmt" survey "github.com/AlecAivazis/survey/v2" ) func main() { var name string prompt := &survey.Input{ Message: "Enter your name: ", } if err := survey.AskOne(prompt, &name); err != nil { fmt.Printf("err: %v\n", err) } else { fmt.Printf("Your name: %v\n", name) } } ``` 運行結果 ```bash # 運行過程 $ go run main.go ? Enter your name: jiaxzeng # 運行結束 $ go run main.go ? Enter your name: jiaxzeng Your name: jiaxzeng ``` ## Multiline 交互輸入的內容保存到變量中，可以識別換行符。結束輸入時，需要練習輸入兩個換行換。 代碼示例 ```go package main import ( "fmt" survey "github.com/AlecAivazis/survey/v2" ) func main() { var message string prompt := &survey.Multiline{ Message: "Enter your message: ", } if err := survey.AskOne(prompt, &message); err != nil { fmt.Printf("err: %v\n", err) } else { fmt.Printf("You input message: %v\n", message) } } ``` 運行結果 ```bash # 運行過程 $ go run main.go ? Enter your message: [Enter 2 empty lines to finish] jiaxzeng xiaodunan # 運行結束 $ go run main.go ? Enter your message: [Enter 2 empty lines to finish] jiaxzeng xiaodunan ? Enter your message: jiaxzeng xiaodunan You input message: jiaxzeng xiaodunan ``` ## Password 交互輸入的內容保存到變量中，將輸入的字符串用 *** 來代替。 代碼示例 ```go package main import ( "fmt" survey "github.com/AlecAivazis/survey/v2" ) func main() { } ``` 運行結果 ```bash # 運行過程 $ go run main.go ? Enter your password: ******** # 運行結束 $ go run main.go ? Enter your password: ******** Password entered: jiaxzeng ``` ## Confirm 交互輸入的內容保存到變量中，詢問是否確認該操作。 代碼示例 ```go package main import ( "fmt" survey "github.com/AlecAivazis/survey/v2" ) func main() { var ok bool prompt := &survey.Confirm{ Message: "Enter Your Confirm", } if err := survey.AskOne(prompt, &ok); err != nil { fmt.Printf("err: %v\n", err) } else { fmt.Printf("Your confirm is: %v\n", ok) } } ``` 運行結果 ```bash # 運行過程 $ go run main.go ? Enter Your Confirm (y/N) n # 運行結束 $ go run main.go ? Enter Your Confirm No Your confirm is: false ``` ## Select 多個選項提供給你選擇，將選擇的結果保存在變量中 代碼示例 ```go package main import ( "fmt" survey "github.com/AlecAivazis/survey/v2" ) func main() { var color string prompt := &survey.Select{ Message: "Choose a color:", Options: []string{"red", "blue", "green"}, } if err := survey.AskOne(prompt, &color); err != nil { fmt.Printf("err: %v\n", err) } else { fmt.Printf("Your choose color is %v\n", color) } } ``` 運行結果 ```bash # 運行過程 $ go run main.go ? Choose a color: [Use arrows to move, type to filter] > red blue green # 運行結束 $ go run main.go ? Choose a color: red Your choose color is red ``` ## MultiSelect 可以多選賦值給變量，選擇使用空格鍵，右鍵選擇所有選項，左鍵取消所有選項，回車確認選擇完成。 代碼示例 ```go package main import ( "fmt" survey "github.com/AlecAivazis/survey/v2" ) func main() { days := []string{} prompt := &survey.MultiSelect{ Message: "What days do you prefer:", Options: []string{"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"}, } if err := survey.AskOne(prompt, &days); err != nil { fmt.Printf("err: %v\n", err) } else { fmt.Printf("Your choose day: %v\n", days) } } ``` 運行結果 ```bash # 運行過程 $ go run main.go ? What days do you prefer: [Use arrows to move, space to select, <right> to all, <left> to none, type to filter] [x] Sunday > [x] Monday [ ] Tuesday [ ] Wednesday [ ] Thursday [x] Friday [x] Saturday # 運行結束 $ go run main.go ? What days do you prefer: Sunday, Monday, Friday, Saturday Your choose day: [Sunday Monday Friday Saturday] ``` ## Editor 生成代碼片。如果編輯器有高亮語法的話，填寫的時候會有高亮提醒。會打開一個文件給用戶寫代碼片，保存后會刪除該文件。把寫入文件的內容賦值給變量。 代碼示例 ```go package main import ( "fmt" survey "github.com/AlecAivazis/survey/v2" ) func main() { } ``` 運行結果 ```bash # 運行過程 $ go run main.go ? Shell code snippet [Enter to launch editor] # 回車 打開一個文件給用戶編寫代碼片，寫完記得保存退出 # 運行結束 $ go run main.go ? Shell code snippet <Received> content: jiaxzeng ``` ## 文檔 Golang pkg：https://pkg.go.dev/github.com/AlecAivazis/survey/v2 GitHub：https://github.com/go-survey/survey