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process.go
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process.go
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// SPDX-License-Identifier: BSD-3-Clause
// Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors.
// Licensed under the BSD-3-Clause License (the "License").
// You may not use this file except in compliance with the License.
package paraprogress
import (
"context"
"fmt"
"strings"
"sync"
"time"
"github.com/charmbracelet/bubbles/progress"
"github.com/charmbracelet/bubbles/spinner"
"github.com/charmbracelet/bubbles/stopwatch"
tea "github.com/charmbracelet/bubbletea"
"github.com/charmbracelet/lipgloss"
"github.com/muesli/reflow/indent"
"kraftkit.sh/log"
"kraftkit.sh/tui"
"kraftkit.sh/utils"
)
var (
lastID int
idMtx sync.Mutex
width = lipgloss.Width
)
func nextID() int {
idMtx.Lock()
defer idMtx.Unlock()
lastID++
return lastID
}
type ProcessStatus uint
const (
StatusPending ProcessStatus = iota
StatusRunning
StatusFailed
StatusSuccess
)
const (
INDENTS = 4
LOGLEN = 5
)
// StatusMsg is sent when the stopwatch should start or stop.
type StatusMsg struct {
ID int
status ProcessStatus
err error
}
// ProgressMsg is sent when an update in the progress percentage occurs.
type ProgressMsg struct {
ID int
progress float64
}
// Process ...
type Process struct {
id int
percent float64
processFunc func(context.Context, func(float64)) error
progress progress.Model
spinner spinner.Model
timer stopwatch.Model
timerWidth int
timerMax int
width int
logs []string
err error
norender bool
ctx context.Context
timeout time.Duration
Name string
NameWidth int
Status ProcessStatus
}
func NewProcess(name string, processFunc func(context.Context, func(float64)) error) *Process {
d := &Process{
id: nextID(),
Name: name,
spinner: spinner.New(),
progress: progress.New(),
timer: stopwatch.NewWithInterval(time.Millisecond * 100),
Status: StatusPending,
NameWidth: len(name),
processFunc: processFunc,
}
d.progress.Full = '•'
d.progress.Empty = ' '
d.progress.EmptyColor = ""
d.progress.FullColor = "245"
d.progress.ShowPercentage = true
d.progress.PercentFormat = " %3.0f%%"
return d
}
func (p *Process) Init() tea.Cmd {
return nil
}
func (p *Process) Start() tea.Cmd {
//nolint:staticcheck
cmds := []tea.Cmd{
p.timer.Init(),
p.spinner.Tick,
func() tea.Msg {
return StatusMsg{
ID: p.id,
status: StatusRunning,
}
},
}
cmds = append(cmds, func() tea.Msg {
p := p // golang closures
if p.norender {
log.G(p.ctx).Info(p.Name)
}
err := p.processFunc(p.ctx, p.onProgress)
p.Status = StatusSuccess
if err != nil {
p.Status = StatusFailed
}
if tprog != nil {
tprog.Send(StatusMsg{
ID: p.id,
status: p.Status,
err: err,
})
}
return nil
})
return tea.Batch(cmds...)
}
// onProgress is called to dynamically inject ProgressMsg into the bubbletea
// runtime
func (p Process) onProgress(progress float64) {
if tprog == nil || progress < 0 {
return
}
tprog.Send(ProgressMsg{
ID: p.id,
progress: progress,
})
}
// Write implements `io.Writer` so we can correctly direct the output from the
// process to an inline fancy logger
func (p *Process) Write(b []byte) (int, error) {
// Remove the last line which is usually appended by a logger
line := strings.TrimSuffix(string(b), "\n")
// Split all lines up so we can individually append them
lines := strings.Split(strings.ReplaceAll(line, "\r\n", "\n"), "\n")
p.logs = append(p.logs, lines...)
return len(b), nil
}
func (p *Process) Close() error {
return nil
}
func (p *Process) Fd() uintptr {
return 0
}
func (d *Process) Update(msg tea.Msg) (*Process, tea.Cmd) {
var cmd tea.Cmd
var cmds []tea.Cmd
d.timer, cmd = d.timer.Update(msg)
cmds = append(cmds, cmd)
switch msg := msg.(type) {
// ProgressMsg is sent when the progress bar wishes
case ProgressMsg:
if msg.ID != d.id {
return d, nil
}
if msg.progress > 1.0 {
msg.progress = 1.0
cmds = append(cmds, d.timer.Stop())
}
d.percent = msg.progress
// TickMsg is sent when the spinner wants to animate itself
case spinner.TickMsg:
if d.timeout != 0 && d.timer.Elapsed() > d.timeout {
d.err = fmt.Errorf("process timedout after %s", d.timeout.String())
d.Status = StatusFailed
cmds = append(cmds, tea.Quit)
}
d.spinner, cmd = d.spinner.Update(msg)
cmds = append(cmds, cmd)
// StatusMsg is sent when the status of the process changes
case StatusMsg:
if msg.ID != d.id {
return d, nil
}
d.Status = msg.status
if d.Status == StatusFailed {
d.err = msg.err
cmds = append(cmds, d.timer.Stop())
} else if d.Status == StatusSuccess {
d.percent = 1.0
cmds = append(cmds, d.timer.Stop())
}
// tea.WindowSizeMsg is sent when the terminal window is resized
case tea.WindowSizeMsg:
d.width = msg.Width
}
return d, tea.Batch(cmds...)
}
func (p Process) View() string {
left := ""
switch p.Status {
case StatusRunning:
left += tui.TextWhiteBgBlue("[" + p.spinner.View() + "]")
case StatusSuccess:
left += tui.TextWhiteBgGreen("[+]")
default:
if p.Status == StatusFailed || p.err != nil {
left += tui.TextWhiteBgRed("<!>")
} else {
left += "[ ]"
}
}
left += " "
leftWidth := width(left)
elapsed := utils.HumanizeDuration(p.timer.Elapsed())
p.timerWidth = width(elapsed)
elapsed = "[" + elapsed + "]"
if p.timerMax-p.timerWidth < 0 {
p.timerMax = p.timerWidth
}
right := " " + tui.TextLightGray(indent.String(elapsed, uint(p.timerMax-p.timerWidth)))
rightWidth := width(right)
middle := lipgloss.NewStyle().
Width(p.NameWidth + 1).
Render(p.Name)
p.progress.Width = p.width - width(middle) - leftWidth - rightWidth
middle += p.progress.ViewAs(p.percent)
s := lipgloss.JoinHorizontal(lipgloss.Top,
left,
middle,
right,
)
// Print the logs for this item
if p.Status != StatusSuccess && p.percent < 1 {
// Newline for the logs
if len(p.logs) > 0 {
s += "\n"
}
truncate := 0
if p.Status != StatusFailed {
loglen := len(p.logs) - LOGLEN
if loglen > 0 {
truncate = loglen
}
}
for _, line := range p.logs[truncate:] {
s += line + "\n"
}
}
return s
}