mirror of
https://github.com/edgelesssys/constellation.git
synced 2024-10-01 01:36:09 -04:00
Activity indicator for init command (#207)
* first version of spinner - implemented class with basic method - covered with dummy test - integrated with init command * Style and license remarks * fixed review remarks * fixed typo + integration of spinner with terminate command * integration of spinner with create command
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@ -114,7 +114,10 @@ func create(cmd *cobra.Command, creator cloudCreator, fileHandler file.Handler)
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}
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}
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spinner := newSpinner(cmd, "Loading ", true)
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spinner.Start()
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state, err := creator.Create(cmd.Context(), provider, config, flags.name, instanceType, flags.controllerCount, flags.workerCount)
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spinner.Stop()
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if err != nil {
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return err
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}
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@ -124,7 +124,8 @@ func initialize(cmd *cobra.Command, newDialer func(validator *cloudcmd.Validator
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return fmt.Errorf("parsing or generating master secret from file %s: %w", flags.masterSecretPath, err)
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}
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cmd.Println("Initializing cluster ...")
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spinner := newSpinner(cmd, "Initializing cluster ", true)
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spinner.Start()
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req := &initproto.InitRequest{
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MasterSecret: masterSecret.Key,
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Salt: masterSecret.Salt,
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@ -141,6 +142,7 @@ func initialize(cmd *cobra.Command, newDialer func(validator *cloudcmd.Validator
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ConformanceMode: flags.conformance,
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}
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resp, err := initCall(cmd.Context(), newDialer(validator), flags.endpoint, req)
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spinner.Stop()
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if err != nil {
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return err
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}
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73
cli/internal/cmd/spinner.go
Normal file
73
cli/internal/cmd/spinner.go
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@ -0,0 +1,73 @@
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/*
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Copyright (c) Edgeless Systems GmbH
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SPDX-License-Identifier: AGPL-3.0-only
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*/
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package cmd
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import (
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"fmt"
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"sync"
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"sync/atomic"
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"time"
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"github.com/spf13/cobra"
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)
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var (
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spinnerStates = []string{"⣾", "⣽", "⣻", "⢿", "⡿", "⣟", "⣯", "⣷"}
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dotsStates = []string{".", "..", "..."}
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)
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type spinner struct {
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out *cobra.Command
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text string
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showDots bool
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delay time.Duration
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wg *sync.WaitGroup
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stop int32
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}
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func newSpinner(c *cobra.Command, text string, showDots bool) *spinner {
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return &spinner{
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out: c,
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text: text,
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showDots: showDots,
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wg: &sync.WaitGroup{},
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delay: 100 * time.Millisecond,
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stop: 0,
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}
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}
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func (s *spinner) Start() {
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s.wg.Add(1)
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go func() {
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defer s.wg.Done()
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for i := 0; ; i = (i + 1) % len(spinnerStates) {
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if atomic.LoadInt32(&s.stop) != 0 {
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break
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}
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dotsState := ""
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if s.showDots {
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dotsState = dotsStates[i%len(dotsStates)]
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}
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state := fmt.Sprintf("\r%s %s%s", spinnerStates[i], s.text, dotsState)
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s.out.Print(state)
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time.Sleep(s.delay)
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}
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dotsState := ""
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if s.showDots {
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dotsState = dotsStates[len(dotsStates)-1]
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}
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finalState := fmt.Sprintf("\r%s%s ", s.text, dotsState)
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s.out.Println(finalState)
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}()
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}
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func (s *spinner) Stop() {
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atomic.StoreInt32(&s.stop, 1)
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s.wg.Wait()
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}
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91
cli/internal/cmd/spinner_test.go
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91
cli/internal/cmd/spinner_test.go
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@ -0,0 +1,91 @@
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/*
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Copyright (c) Edgeless Systems GmbH
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SPDX-License-Identifier: AGPL-3.0-only
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*/
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package cmd
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import (
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"bytes"
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"fmt"
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"strings"
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"testing"
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"time"
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"github.com/stretchr/testify/require"
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)
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const (
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baseWait = 1
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baseText = "Loading"
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)
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func TestSpinnerInitialState(t *testing.T) {
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cmd := NewInitCmd()
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var out bytes.Buffer
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cmd.SetOut(&out)
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var errOut bytes.Buffer
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cmd.SetErr(&errOut)
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s := newSpinner(cmd, baseText, true)
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s.Start()
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time.Sleep(baseWait * time.Second)
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s.Stop()
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require.True(t, out.Len() > 0)
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require.True(t, errOut.Len() == 0)
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outStr := out.String()
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require.True(t, strings.HasPrefix(outStr, generateAllStatesAsString(baseText, true)))
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}
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func TestSpinnerFinalState(t *testing.T) {
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cmd := NewInitCmd()
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var out bytes.Buffer
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cmd.SetOut(&out)
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var errOut bytes.Buffer
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cmd.SetErr(&errOut)
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s := newSpinner(cmd, baseText, true)
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s.Start()
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time.Sleep(baseWait * time.Second)
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s.Stop()
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require.True(t, out.Len() > 0)
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require.True(t, errOut.Len() == 0)
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outStr := out.String()
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require.True(t, strings.HasSuffix(outStr, baseText+"... \n"))
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}
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func TestSpinnerDisabledShowDotsFlag(t *testing.T) {
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cmd := NewInitCmd()
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var out bytes.Buffer
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cmd.SetOut(&out)
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var errOut bytes.Buffer
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cmd.SetErr(&errOut)
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s := newSpinner(cmd, baseText, false)
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s.Start()
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time.Sleep(baseWait * time.Second)
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s.Stop()
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require.True(t, out.Len() > 0)
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require.True(t, errOut.Len() == 0)
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outStr := out.String()
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require.True(t, strings.HasPrefix(outStr, generateAllStatesAsString(baseText, false)))
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require.True(t, strings.HasSuffix(outStr, baseText+" \n"))
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}
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func generateAllStatesAsString(text string, showDots bool) string {
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var builder strings.Builder
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for i := 0; i < len(spinnerStates); i++ {
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dotsState := ""
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if showDots {
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dotsState = dotsStates[i%len(dotsStates)]
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}
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builder.WriteString(fmt.Sprintf("\r%s %s%s", spinnerStates[i], text, dotsState))
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}
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return builder.String()
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}
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@ -47,9 +47,11 @@ func terminate(cmd *cobra.Command, terminator cloudTerminator, fileHandler file.
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return fmt.Errorf("reading Constellation state: %w", err)
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}
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cmd.Println("Terminating ...")
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if err := terminator.Terminate(cmd.Context(), stat); err != nil {
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spinner := newSpinner(cmd, "Terminating ", true)
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spinner.Start()
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err := terminator.Terminate(cmd.Context(), stat)
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spinner.Stop()
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if err != nil {
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return fmt.Errorf("terminating Constellation cluster: %w", err)
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}
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