remove old/unused progress code
This commit is contained in:
Adrien Delorme
parent
059e14fe42
commit
7f50228080
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@ -1,146 +0,0 @@
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package common
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import (
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"fmt"
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"log"
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"reflect"
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"time"
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"github.com/cheggaaa/pb"
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"github.com/hashicorp/packer/helper/multistep"
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"github.com/hashicorp/packer/packer"
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"github.com/hashicorp/packer/packer/rpc"
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)
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// This is the arrow from packer/ui.go -> TargetedUI.prefixLines
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const targetedUIArrowText = "==>"
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// The ProgressBar interface is used for abstracting cheggaaa's progress-
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// bar, or any other progress bar. If a UI does not support a progress-
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// bar, then it must return a null progress bar.
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const (
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DefaultProgressBarWidth = 80
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)
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type ProgressBar = *pb.ProgressBar
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// Figure out the terminal dimensions and use it to calculate the available rendering space
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func calculateProgressBarWidth(length int) int {
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// If the UI's width is signed, then this is an interface that doesn't really benefit from a progress bar
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if length < 0 {
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log.Println("Refusing to render progress-bar for unsupported UI.")
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return length
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}
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// Figure out the terminal width if possible
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width, _, err := GetTerminalDimensions()
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if err != nil {
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newerr := fmt.Errorf("Unable to determine terminal dimensions: %v", err)
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log.Printf("Using default width (%d) for progress-bar due to error: %s", DefaultProgressBarWidth, newerr)
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return DefaultProgressBarWidth
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}
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// If the terminal width is smaller than the requested length, then complain
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if width < length {
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newerr := fmt.Errorf("Terminal width (%d) is smaller than UI message width (%d).", width, length)
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log.Printf("Using default width (%d) for progress-bar due to error: %s", DefaultProgressBarWidth, newerr)
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return DefaultProgressBarWidth
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}
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// Otherwise subtract the minimum length and return it
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return width - length
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}
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// Get a progress bar with the default appearance
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func GetDefaultProgressBar() ProgressBar {
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bar := pb.New64(0)
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bar.ShowPercent = true
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bar.ShowCounters = true
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bar.ShowSpeed = false
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bar.ShowBar = true
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bar.ShowTimeLeft = false
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bar.ShowFinalTime = false
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bar.SetUnits(pb.U_BYTES)
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bar.Format("[=>-]")
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bar.SetRefreshRate(5 * time.Second)
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return bar
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}
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// Return a dummy progress bar that doesn't do anything
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func GetDummyProgressBar() ProgressBar {
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bar := pb.New64(0)
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bar.ManualUpdate = true
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return bar
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}
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// Given a packer.Ui, calculate the number of characters that a packer.Ui will
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// prefix a message with. Then we can use this to calculate the progress bar's width.
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func calculateUiPrefixLength(ui packer.Ui) int {
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var recursiveCalculateUiPrefixLength func(packer.Ui, int) int
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// Define a recursive closure that traverses through all the known packer.Ui types
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// and aggregates the length of the message prefix from each particular type
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recursiveCalculateUiPrefixLength = func(ui packer.Ui, agg int) int {
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switch ui.(type) {
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case *packer.ColoredUi:
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// packer.ColoredUi is simply a wrapper around .Ui
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u := ui.(*packer.ColoredUi)
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return recursiveCalculateUiPrefixLength(u.Ui, agg)
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case *packer.TargetedUI:
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// A TargetedUI adds the .Target and an arrow by default
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u := ui.(*packer.TargetedUI)
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res := fmt.Sprintf("%s %s: ", targetedUIArrowText, u.Target)
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return recursiveCalculateUiPrefixLength(u.Ui, agg+len(res))
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case *packer.BasicUi:
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// The standard BasicUi appends only a newline
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return agg + len("\n")
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// packer.rpc.Ui returns 0 here to trigger the hack described later
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case *rpc.Ui:
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return 0
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case *packer.MachineReadableUi:
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// MachineReadableUi doesn't emit anything...like at all
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return 0
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}
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log.Printf("Calculating the message prefix length for packer.Ui type (%T) is not implemented. Using the current aggregated length of %d.", ui, agg)
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return agg
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}
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return recursiveCalculateUiPrefixLength(ui, 0)
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}
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func GetPackerConfigFromStateBag(state multistep.StateBag) *PackerConfig {
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config := state.Get("config")
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rConfig := reflect.Indirect(reflect.ValueOf(config))
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iPackerConfig := rConfig.FieldByName("PackerConfig").Interface()
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packerConfig := iPackerConfig.(PackerConfig)
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return &packerConfig
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}
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func GetProgressBar(ui packer.Ui, config *PackerConfig) ProgressBar {
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// Figure out the prefix length by quering the UI
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uiPrefixLength := calculateUiPrefixLength(ui)
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// hack to deal with packer.rpc.Ui courtesy of @Swampdragons
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if _, ok := ui.(*rpc.Ui); uiPrefixLength == 0 && config != nil && ok {
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res := fmt.Sprintf("%s %s: \n", targetedUIArrowText, config.PackerBuildName)
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uiPrefixLength = len(res)
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}
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// Now we can use the prefix length to calculate the progress bar width
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width := calculateProgressBarWidth(uiPrefixLength)
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log.Printf("ProgressBar: Using progress bar width: %d\n", width)
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// Get a default progress bar and set some output defaults
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bar := GetDefaultProgressBar()
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bar.SetWidth(width)
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bar.Callback = func(message string) {
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ui.Message(message)
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}
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return bar
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}
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@ -1,142 +0,0 @@
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package common
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import (
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"github.com/hashicorp/packer/packer"
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"testing"
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)
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// test packer.Ui implementation to verify that progress bar is being written
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type testProgressBarUi struct {
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messageCalled bool
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messageMessage string
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}
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func (u *testProgressBarUi) Say(string) {}
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func (u *testProgressBarUi) Error(string) {}
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func (u *testProgressBarUi) Machine(string, ...string) {}
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func (u *testProgressBarUi) Ask(string) (string, error) {
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return "", nil
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}
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func (u *testProgressBarUi) Message(message string) {
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u.messageCalled = true
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u.messageMessage = message
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}
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// ..and now let's begin our actual tests
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func TestCalculateUiPrefixLength_Unknown(t *testing.T) {
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ui := &testProgressBarUi{}
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expected := 0
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if res := calculateUiPrefixLength(ui); res != expected {
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t.Fatalf("calculateUiPrefixLength should have returned a length of %d", expected)
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}
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}
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func TestCalculateUiPrefixLength_BasicUi(t *testing.T) {
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ui := &packer.BasicUi{}
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expected := 1
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if res := calculateUiPrefixLength(ui); res != expected {
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t.Fatalf("calculateUiPrefixLength should have returned a length of %d", expected)
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}
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}
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func TestCalculateUiPrefixLength_TargetedUI(t *testing.T) {
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ui := &packer.TargetedUI{}
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ui.Target = "TestTarget"
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arrowText := "==>"
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expected := len(arrowText + " " + ui.Target + ": ")
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if res := calculateUiPrefixLength(ui); res != expected {
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t.Fatalf("calculateUiPrefixLength should have returned a length of %d", expected)
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}
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}
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func TestCalculateUiPrefixLength_TargetedUIWrappingBasicUi(t *testing.T) {
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ui := &packer.TargetedUI{}
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ui.Target = "TestTarget"
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ui.Ui = &packer.BasicUi{}
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arrowText := "==>"
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expected := len(arrowText + " " + ui.Target + ": " + "\n")
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if res := calculateUiPrefixLength(ui); res != expected {
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t.Fatalf("calculateUiPrefixLength should have returned a length of %d", expected)
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}
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}
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func TestCalculateUiPrefixLength_TargetedUIWrappingMachineUi(t *testing.T) {
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ui := &packer.TargetedUI{}
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ui.Target = "TestTarget"
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ui.Ui = &packer.MachineReadableUi{}
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expected := 0
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if res := calculateUiPrefixLength(ui); res != expected {
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t.Fatalf("calculateUiPrefixLength should have returned a length of %d", expected)
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}
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}
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func TestDefaultProgressBar(t *testing.T) {
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var callbackCalled bool
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// Initialize the default progress bar
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bar := GetDefaultProgressBar()
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bar.Callback = func(state string) {
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callbackCalled = true
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t.Logf("TestDefaultProgressBar emitted %#v", state)
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}
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bar.SetTotal64(1)
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// Set it off
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progressBar := bar.Start()
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progressBar.Set64(1)
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// Check to see that the callback was hit
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if !callbackCalled {
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t.Fatalf("TestDefaultProgressBar.Callback should be called")
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}
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}
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func TestDummyProgressBar(t *testing.T) {
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var callbackCalled bool
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// Initialize the dummy progress bar
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bar := GetDummyProgressBar()
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bar.Callback = func(state string) {
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callbackCalled = true
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t.Logf("TestDummyProgressBar emitted %#v", state)
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}
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bar.SetTotal64(1)
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// Now we can go
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progressBar := bar.Start()
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progressBar.Set64(1)
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// Check to see that the callback was hit
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if callbackCalled {
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t.Fatalf("TestDummyProgressBar.Callback should not be called")
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}
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}
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func TestUiProgressBar(t *testing.T) {
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ui := &testProgressBarUi{}
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// Initialize the Ui progress bar
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bar := GetProgressBar(ui, nil)
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bar.SetTotal64(1)
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// Ensure that callback has been set to something
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if bar.Callback == nil {
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t.Fatalf("TestUiProgressBar.Callback should be initialized")
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}
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// Now we can go
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progressBar := bar.Start()
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progressBar.Set64(1)
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// Check to see that the callback was hit
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if !ui.messageCalled {
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t.Fatalf("TestUiProgressBar.messageCalled should be called")
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}
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t.Logf("TestUiProgressBar emitted %#v", ui.messageMessage)
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}
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