github.com/solo-io/cue@v0.4.7/pkg/tool/cli/cli.go (about) 1 // Copyright 2019 CUE Authors 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 package cli 16 17 //go:generate go run gen.go 18 //go:generate gofmt -s -w . 19 20 import ( 21 "fmt" 22 "strings" 23 24 "github.com/solo-io/cue/cue" 25 "github.com/solo-io/cue/internal/task" 26 ) 27 28 func init() { 29 task.Register("tool/cli.Print", newPrintCmd) 30 task.Register("tool/cli.Ask", newAskCmd) 31 32 // For backwards compatibility. 33 task.Register("print", newPrintCmd) 34 } 35 36 type printCmd struct{} 37 38 func newPrintCmd(v cue.Value) (task.Runner, error) { 39 return &printCmd{}, nil 40 } 41 42 func (c *printCmd) Run(ctx *task.Context) (res interface{}, err error) { 43 str := ctx.String("text") 44 if ctx.Err != nil { 45 return nil, ctx.Err 46 } 47 fmt.Fprintln(ctx.Stdout, str) 48 return nil, nil 49 } 50 51 type askCmd struct{} 52 53 func newAskCmd(v cue.Value) (task.Runner, error) { 54 return &askCmd{}, nil 55 } 56 57 func (c *askCmd) Run(ctx *task.Context) (res interface{}, err error) { 58 str := ctx.String("prompt") 59 if ctx.Err != nil { 60 return nil, ctx.Err 61 } 62 if str != "" { 63 fmt.Fprint(ctx.Stdout, str+" ") 64 } 65 66 var response string 67 if _, err := fmt.Scan(&response); err != nil { 68 return nil, err 69 } 70 71 update := map[string]interface{}{"response": response} 72 73 switch v := ctx.Lookup("response"); v.IncompleteKind() { 74 case cue.BoolKind: 75 switch strings.ToLower(response) { 76 case "yes": 77 update["response"] = true 78 default: 79 update["response"] = false 80 } 81 case cue.StringKind: 82 // already set above 83 } 84 return update, nil 85 }