Add spinner at preparing Kubernetes...

go.mod

@@ -4,13 +4,15 @@ go 1.15
 
 require (
 	cloud.google.com/go/storage v1.10.0
+	contrib.go.opencensus.io/exporter/stackdriver v0.12.1
 	github.com/Azure/azure-sdk-for-go v42.3.0+incompatible
 	github.com/GoogleCloudPlatform/opentelemetry-operations-go/exporter/trace v0.13.0
 	github.com/Microsoft/go-winio v0.4.15-0.20190919025122-fc70bd9a86b5 // indirect
 	github.com/Parallels/docker-machine-parallels/v2 v2.0.1
 	github.com/StackExchange/wmi v0.0.0-20190523213315-cbe66965904d // indirect
 	github.com/VividCortex/godaemon v0.0.0-20201030160542-15e3f4925a21
 	github.com/blang/semver v3.5.0+incompatible
+	github.com/briandowns/spinner v1.11.1
 	github.com/c4milo/gotoolkit v0.0.0-20170318115440-bcc06269efa9 // indirect
 	github.com/cenkalti/backoff v2.2.1+incompatible
 	github.com/cenkalti/backoff/v4 v4.1.0
@@ -75,6 +77,7 @@ require (
 	github.com/xeipuuv/gojsonreference v0.0.0-20180127040603-bd5ef7bd5415 // indirect
 	github.com/xeipuuv/gojsonschema v0.0.0-20180618132009-1d523034197f
 	github.com/zchee/go-vmnet v0.0.0-20161021174912-97ebf9174097
+	go.opencensus.io v0.22.4
 	go.opentelemetry.io/otel v0.13.0
 	go.opentelemetry.io/otel/sdk v0.13.0
 	golang.org/x/build v0.0.0-20190927031335-2835ba2e683f
@@ -102,6 +105,7 @@ require (
 
 replace (
 	git.apache.org/thrift.git => github.com/apache/thrift v0.0.0-20180902110319-2566ecd5d999
+	github.com/briandowns/spinner => github.com/alonyb/spinner v1.12.1
 	github.com/docker/docker => github.com/docker/docker v1.4.2-0.20190924003213-a8608b5b67c7
 	github.com/docker/machine => github.com/machine-drivers/machine v0.7.1-0.20200810185219-7d42fed1b770
 	github.com/google/go-containerregistry => github.com/afbjorklund/go-containerregistry v0.0.0-20200902152226-fbad78ec2813

go.sum

@@ -143,6 +143,8 @@ github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf h1:qet1QNfXsQxTZq
 github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
 github.com/alecthomas/units v0.0.0-20190717042225-c3de453c63f4/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
 github.com/alecthomas/units v0.0.0-20190924025748-f65c72e2690d/go.mod h1:rBZYJk541a8SKzHPHnH3zbiI+7dagKZ0cgpgrD7Fyho=
+github.com/alonyb/spinner v1.12.1 h1:zB6IQ29/kTR/NWHJhIgU2tXW+fhXa3K5zrDQMddd9H0=
+github.com/alonyb/spinner v1.12.1/go.mod h1:QOuQk7x+EaDASo80FEXwlwiA+j/PPIcX3FScO+3/ZPQ=
 github.com/andreyvit/diff v0.0.0-20170406064948-c7f18ee00883/go.mod h1:rCTlJbsFo29Kk6CurOXKm700vrz8f0KW0JNfpkRJY/8=
 github.com/anmitsu/go-shlex v0.0.0-20161002113705-648efa622239/go.mod h1:2FmKhYUyUczH0OGQWaF5ceTx0UBShxjsH6f8oGKYe2c=
 github.com/apex/log v1.1.4/go.mod h1:AlpoD9aScyQfJDVHmLMEcx4oU6LqzkWp4Mg9GdAcEvQ=

pkg/minikube/out/out.go

@@ -26,7 +26,9 @@ import (
 	"os"
 	"strconv"
 	"strings"
+	"time"
 
+	"github.com/briandowns/spinner"
 	isatty "github.com/mattn/go-isatty"
 
 	"k8s.io/klog/v2"
@@ -58,10 +60,14 @@ var (
 	OverrideEnv = "MINIKUBE_IN_STYLE"
 	// JSON is whether or not we should output stdout in JSON format. Set using SetJSON()
 	JSON = false
+	// spin is spinner showed at starting minikube
+	spin = spinner.New(spinner.CharSets[style.SpinnerCharacter], 100*time.Millisecond)
 )
 
 // MaxLogEntries controls the number of log entries to show for each source
-const MaxLogEntries = 3
+const (
+	MaxLogEntries = 3
+)
 
 // fdWriter is the subset of file.File that implements io.Writer and Fd()
 type fdWriter interface {
@@ -78,18 +84,22 @@ func Step(st style.Enum, format string, a ...V) {
 		Infof(format, a...)
 		return
 	}
-	outStyled := stylized(st, useColor, format, a...)
+	outStyled, spinner := stylized(st, useColor, format, a...)
 	if JSON {
 		register.PrintStep(outStyled)
 		return
 	}
 	register.RecordStep(outStyled)
-	String(outStyled)
+	if spinner {
+		spinnerString(outStyled)
+	} else {
+		String(outStyled)
+	}
 }
 
 // Infof is used for informational logs (options, env variables, etc)
 func Infof(format string, a ...V) {
-	outStyled := stylized(style.Option, useColor, format, a...)
+	outStyled, _ := stylized(style.Option, useColor, format, a...)
 	if JSON {
 		register.PrintInfo(outStyled)
 		return
@@ -106,13 +116,34 @@ func String(format string, a ...interface{}) {
 		klog.Warningf("[unset outFile]: %s", fmt.Sprintf(format, a...))
 		return
 	}
-
 	klog.Infof(format, a...)
+	// if spin is active from a previous step, it will stop spinner displaying
+	if spin.Active() {
+		spin.Stop()
+	}
+	_, err := fmt.Fprintf(outFile, format, a...)
+	if err != nil {
+		klog.Errorf("Fprintf failed: %v", err)
+	}
+}
 
+// spinnerString writes a basic formatted string to stdout with spinner character
+func spinnerString(format string, a ...interface{}) {
+	// Flush log buffer so that output order makes sense
+	klog.Flush()
+
+	if outFile == nil {
+		klog.Warningf("[unset outFile]: %s", fmt.Sprintf(format, a...))
+		return
+	}
+
+	klog.Infof(format, a...)
 	_, err := fmt.Fprintf(outFile, format, a...)
 	if err != nil {
 		klog.Errorf("Fprintf failed: %v", err)
 	}
+	// Start spinning at the end of the printed line
+	spin.Start()
 }
 
 // Ln writes a basic formatted string with a newline to stdout
@@ -126,7 +157,7 @@ func Ln(format string, a ...interface{}) {
 
 // ErrT writes a stylized and templated error message to stderr
 func ErrT(st style.Enum, format string, a ...V) {
-	errStyled := stylized(st, useColor, format, a...)
+	errStyled, _ := stylized(st, useColor, format, a...)
 	Err(errStyled)
 }
 
@@ -169,7 +200,8 @@ func FatalT(format string, a ...V) {
 // WarningT is a shortcut for writing a templated warning message to stderr
 func WarningT(format string, a ...V) {
 	if JSON {
-		register.PrintWarning(stylized(style.Warning, useColor, format, a...))
+		st, _ := stylized(style.Warning, useColor, format, a...)
+		register.PrintWarning(st)
 		return
 	}
 	ErrT(style.Warning, format, a...)

pkg/minikube/out/out_style.go

@@ -31,7 +31,7 @@ func applyPrefix(prefix, format string) string {
 }
 
 // applyStyle translates the given string if necessary then adds any appropriate style prefix.
-func applyStyle(st style.Enum, useColor bool, format string) string {
+func applyStyle(st style.Enum, useColor bool, format string) (string, bool) {
 	format = translate.T(format)
 
 	s, ok := style.Config[st]
@@ -41,20 +41,21 @@ func applyStyle(st style.Enum, useColor bool, format string) string {
 
 	// Similar to CSS styles, if no style matches, output an unformatted string.
 	if !ok || JSON {
-		return format
+		return format, s.Spinner
 	}
 
 	if !useColor {
-		return applyPrefix(style.LowPrefix(s), format)
+		return applyPrefix(style.LowPrefix(s), format), s.Spinner
 	}
-	return applyPrefix(s.Prefix, format)
+	return applyPrefix(s.Prefix, format), s.Spinner
 }
 
 // stylized applies formatting to the provided template
-func stylized(st style.Enum, useColor bool, format string, a ...V) string {
+func stylized(st style.Enum, useColor bool, format string, a ...V) (string, bool) {
+	var spinner bool
 	if a == nil {
 		a = []V{{}}
 	}
-	format = applyStyle(st, useColor, format)
-	return Fmt(format, a...)
+	format, spinner = applyStyle(st, useColor, format)
+	return Fmt(format, a...), spinner
 }

pkg/minikube/out/out_style_test.go

@@ -83,7 +83,7 @@ func TestApplyStyle(t *testing.T) {
 	}
 	for _, test := range tests {
 		t.Run(test.description, func(t *testing.T) {
-			rawGot := applyStyle(test.styleEnum, test.useColor, test.format)
+			rawGot, _ := applyStyle(test.styleEnum, test.useColor, test.format)
 			got := strings.TrimSpace(rawGot)
 			if got != test.expected {
 				t.Errorf("Expected '%v' but got '%v'", test.expected, got)
@@ -139,7 +139,7 @@ func TestApplyTemplateFormating(t *testing.T) {
 	}
 	for _, test := range tests {
 		t.Run(test.description, func(t *testing.T) {
-			rawGot := stylized(test.styleEnum, test.useColor, test.format, test.a...)
+			rawGot, _ := stylized(test.styleEnum, test.useColor, test.format, test.a...)
 			got := strings.TrimSpace(rawGot)
 			if got != test.expected {
 				t.Errorf("Expected '%v' but got '%v'", test.expected, got)

pkg/minikube/style/style.go

@@ -41,8 +41,12 @@ type Options struct {
 	LowPrefix string
 	// OmitNewline omits a newline at the end of a message.
 	OmitNewline bool
+	// Spinner is a character to place at ending of message
+	Spinner bool
 }
 
+const SpinnerCharacter = 9
+
 // Config is a map of style name to style struct
 // For consistency, ensure that emojis added render with the same width across platforms.
 var Config = map[Enum]Options{
@@ -104,7 +108,7 @@ var Config = map[Enum]Options{
 	Copying:          {Prefix: "✨  "},
 	CRIO:             {Prefix: "🎁  "}, // This should be a snow-flake, but the emoji has a strange width on macOS
 	DeletingHost:     {Prefix: "🔥  "},
-	Docker:           {Prefix: "🐳  "},
+	Docker:           {Prefix: "🐳  ", OmitNewline: true, Spinner: true},
 	DryRun:           {Prefix: "🌵  "},
 	Enabling:         {Prefix: "🔌  "},
 	FileDownload:     {Prefix: "💾  "},