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renderer.go
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renderer.go
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package hud
import (
"fmt"
"os"
"strings"
"sync"
"time"
"github.com/gdamore/tcell"
"github.com/windmilleng/tilt/internal/dockercompose"
"github.com/windmilleng/tilt/internal/hud/view"
"github.com/windmilleng/tilt/internal/rty"
"github.com/windmilleng/tilt/pkg/model"
)
const defaultLogPaneHeight = 8
type Renderer struct {
rty rty.RTY
screen tcell.Screen
mu *sync.Mutex
clock func() time.Time
}
func NewRenderer(clock func() time.Time) *Renderer {
return &Renderer{
mu: new(sync.Mutex),
clock: clock,
}
}
func (r *Renderer) Render(v view.View, vs view.ViewState) error {
r.mu.Lock()
defer r.mu.Unlock()
if r.rty != nil {
layout := r.layout(v, vs)
err := r.rty.Render(layout)
if err != nil {
return err
}
}
return nil
}
var cText = tcell.Color232
var cLightText = tcell.Color243
var cGood = tcell.ColorGreen
var cBad = tcell.ColorRed
var cPending = tcell.ColorYellow
var statusColors = map[string]tcell.Color{
"Running": cGood,
"ContainerCreating": cPending,
"Pending": cPending,
"PodInitializing": cPending,
"Error": cBad,
"CrashLoopBackOff": cBad,
"ErrImagePull": cBad,
"ImagePullBackOff": cBad,
"RunContainerError": cBad,
"StartError": cBad,
string(dockercompose.StatusInProg): cPending,
string(dockercompose.StatusUp): cGood,
string(dockercompose.StatusDown): cBad,
"Completed": cGood,
// Placeholder. LocalResource has no runtime status; if build succeeds, should always be green
view.LocalResourceStatusPlaceholder: cGood,
}
func (r *Renderer) layout(v view.View, vs view.ViewState) rty.Component {
l := rty.NewFlexLayout(rty.DirVert)
if vs.ShowNarration {
l.Add(renderNarration(vs.NarrationMessage))
l.Add(rty.NewLine())
}
l.Add(r.renderResourceHeader(v))
l.Add(r.renderResources(v, vs))
l.Add(r.renderLogPane(v, vs))
l.Add(r.renderFooter(v, keyLegend(v, vs)))
var ret rty.Component = l
ret = r.maybeAddFullScreenLog(v, vs, ret)
ret = r.maybeAddAlertModal(v, vs, ret)
return ret
}
func (r *Renderer) maybeAddFullScreenLog(v view.View, vs view.ViewState, layout rty.Component) rty.Component {
if vs.TiltLogState == view.TiltLogFullScreen {
tabView := NewTabView(v, vs)
l := rty.NewConcatLayout(rty.DirVert)
sl := rty.NewTextScrollLayout("log")
l.Add(tabView.buildTabs(true))
sl.Add(rty.TextString(tabView.log()))
l.AddDynamic(sl)
l.Add(r.renderFooter(v, keyLegend(v, vs)))
layout = rty.NewModalLayout(layout, l, 1, true)
}
return layout
}
func (r *Renderer) maybeAddAlertModal(v view.View, vs view.ViewState, layout rty.Component) rty.Component {
alertMsg := ""
if v.FatalError != nil {
alertMsg = fmt.Sprintf("Tilt has encountered a fatal error: %s\nOnce you fix this issue you'll need to restart Tilt. In the meantime feel free to browse through the UI.", v.FatalError.Error())
} else if vs.AlertMessage != "" {
alertMsg = vs.AlertMessage
}
if alertMsg != "" {
l := rty.NewLines()
l.Add(rty.TextString(""))
msg := " " + alertMsg + " "
l.Add(rty.Fg(rty.TextString(msg), tcell.ColorDefault))
l.Add(rty.TextString(""))
w := rty.NewWindow(l)
w.SetTitle("! Alert !")
layout = r.renderModal(rty.Fg(w, tcell.ColorRed), layout, false)
}
return layout
}
func (r *Renderer) renderLogPane(v view.View, vs view.ViewState) rty.Component {
tabView := NewTabView(v, vs)
var height int
switch vs.TiltLogState {
case view.TiltLogShort:
height = defaultLogPaneHeight
case view.TiltLogHalfScreen:
height = rty.GROW
case view.TiltLogFullScreen:
height = 1
// FullScreen is handled elsewhere, since it's no longer a pane
// but we have to set height to something non-0 or rty will blow up
}
return rty.NewFixedSize(tabView.Build(), rty.GROW, height)
}
func renderPaneHeader(isMax bool) rty.Component {
var verb string
if isMax {
verb = "contract"
} else {
verb = "expand"
}
s := fmt.Sprintf("X: %s", verb)
l := rty.NewLine()
l.Add(rty.NewFillerString(' '))
l.Add(rty.TextString(fmt.Sprintf(" %s ", s)))
return l
}
func (r *Renderer) renderStatusBar(v view.View) rty.Component {
sb := rty.NewStringBuilder()
sb.Text(" ") // Indent
errorCount := 0
for _, res := range v.Resources {
if isInError(res) {
errorCount++
}
}
if errorCount == 0 && v.TiltfileErrorMessage() == "" {
sb.Fg(cGood).Text("✓").Fg(tcell.ColorDefault).Fg(cText).Text(" OK").Fg(tcell.ColorDefault)
} else {
var errorCountMessage string
var tiltfileError strings.Builder
s := "error"
if errorCount > 1 {
s = "errors"
}
if errorCount > 0 {
errorCountMessage = fmt.Sprintf(" %d %s", errorCount, s)
}
if v.TiltfileErrorMessage() != "" {
_, _ = tiltfileError.WriteString(" • Tiltfile error")
}
sb.Fg(cBad).Text("✖").Fg(tcell.ColorDefault).Fg(cText).Textf("%s%s", errorCountMessage, tiltfileError.String()).Fg(tcell.ColorDefault)
}
return rty.Bg(rty.OneLine(sb.Build()), tcell.ColorWhiteSmoke)
}
func (r *Renderer) renderFooter(v view.View, keys string) rty.Component {
footer := rty.NewConcatLayout(rty.DirVert)
footer.Add(r.renderStatusBar(v))
l := rty.NewConcatLayout(rty.DirHor)
sbRight := rty.NewStringBuilder()
sbRight.Text(keys)
l.AddDynamic(rty.NewFillerString(' '))
l.Add(sbRight.Build())
footer.Add(l)
return rty.NewFixedSize(footer, rty.GROW, 2)
}
func keyLegend(v view.View, vs view.ViewState) string {
defaultKeys := "Browse (↓ ↑), Expand (→) ┊ (enter) log, (b)rowser ┊ (ctrl-C) quit "
if vs.AlertMessage != "" {
return "Tilt (l)og ┊ (esc) close alert "
}
return defaultKeys
}
func isInError(res view.Resource) bool {
return statusColor(res) == cBad
}
func isCrashing(res view.Resource) bool {
return (res.IsK8s() && res.K8sInfo().PodRestarts > 0) ||
res.LastBuild().Reason.Has(model.BuildReasonFlagCrash) ||
res.CurrentBuild.Reason.Has(model.BuildReasonFlagCrash) ||
res.PendingBuildReason.Has(model.BuildReasonFlagCrash) ||
res.IsDC() && res.DockerComposeTarget().Status() == string(dockercompose.StatusCrash)
}
func (r *Renderer) renderModal(fg rty.Component, bg rty.Component, fixed bool) rty.Component {
return rty.NewModalLayout(bg, fg, .9, fixed)
}
func renderNarration(msg string) rty.Component {
lines := rty.NewLines()
l := rty.NewLine()
l.Add(rty.TextString(msg))
lines.Add(rty.NewLine())
lines.Add(l)
lines.Add(rty.NewLine())
box := rty.Fg(rty.Bg(lines, tcell.ColorLightGrey), cText)
return rty.NewFixedSize(box, rty.GROW, 3)
}
func (r *Renderer) renderResourceHeader(v view.View) rty.Component {
l := rty.NewConcatLayout(rty.DirHor)
l.Add(rty.ColoredString(" RESOURCE NAME ", cLightText))
l.AddDynamic(rty.NewFillerString(' '))
k8sCell := rty.ColoredString(" CONTAINER", cLightText)
l.Add(k8sCell)
l.Add(middotText())
buildCell := rty.NewMinLengthLayout(BuildDurCellMinWidth+BuildStatusCellMinWidth, rty.DirHor).
SetAlign(rty.AlignEnd).
Add(rty.ColoredString("UPDATE STATUS ", cLightText))
l.Add(buildCell)
l.Add(middotText())
deployCell := rty.NewMinLengthLayout(DeployCellMinWidth+1, rty.DirHor).
SetAlign(rty.AlignEnd).
Add(rty.ColoredString("AS OF ", cLightText))
l.Add(deployCell)
return rty.OneLine(l)
}
func (r *Renderer) renderResources(v view.View, vs view.ViewState) rty.Component {
rs := v.Resources
cl := rty.NewConcatLayout(rty.DirVert)
childNames := make([]string, len(rs))
for i, r := range rs {
childNames[i] = r.Name.String()
}
// the items added to `l` below must be kept in sync with `childNames` above
l, selectedResource := r.rty.RegisterElementScroll(resourcesScollerName, childNames)
if len(rs) > 0 {
for i, res := range rs {
resView := NewResourceView(v.LogReader, res, vs.Resources[i], res.TriggerMode, selectedResource == res.Name.String(), r.clock)
l.Add(resView.Build())
}
}
cl.Add(l)
return cl
}
func (r *Renderer) SetUp() (chan tcell.Event, error) {
r.mu.Lock()
defer r.mu.Unlock()
screen, err := tcell.NewScreen()
if err != nil {
if err == tcell.ErrTermNotFound {
// The statically-compiled tcell only supports the most common TERM configs.
// The dynamically-compiled tcell supports more, but has distribution problems.
// See: https://github.com/gdamore/tcell/issues/252
term := os.Getenv("TERM")
return nil, fmt.Errorf("Tilt does not support TERM=%q. "+
"This is not a common Terminal config. "+
"If you expect that you're using a common terminal, "+
"you might have misconfigured $TERM in your .profile.", term)
}
return nil, err
}
if err = screen.Init(); err != nil {
return nil, err
}
screenEvents := make(chan tcell.Event)
go func() {
for {
screenEvents <- screen.PollEvent()
}
}()
r.rty = rty.NewRTY(screen)
r.screen = screen
return screenEvents, nil
}
func (r *Renderer) Reset() {
r.mu.Lock()
defer r.mu.Unlock()
if r.screen != nil {
r.screen.Fini()
}
r.screen = nil
}