Files
larksuite-cli/internal/output/spinner.go
陈兴炀 f334cc9b34 feat(apps): integrate miaoda db/file CLI commands into apps-spark integration
Bring in the refined miaoda Spark db/file command set from the
feat/miaoda-db-file-openapi work: db execute (typed errs + per-SQL-type
JSON shaping), env diff/migrate, PITR recovery, changelog/audit, data
import/export, db/file quota, and the 7 file-storage commands; plus the
stderr spinner for slow ops and the aligned lark-apps skill references.

Resolved overlap with the integration branch's earlier db-execute
iteration (took the refined typed-error version), unified the stderr-TTY
flag on IOStreams.StderrIsTerminal, and combined the shortcut registry
(43 commands total).
2026-06-25 14:48:58 +08:00

81 lines
2.3 KiB
Go

// Copyright (c) 2026 Lark Technologies Pte. Ltd.
// SPDX-License-Identifier: MIT
package output
import (
"fmt"
"io"
"sync"
"time"
)
// spinnerFrames are braille spinner glyphs cycled to animate progress.
var spinnerFrames = []string{"⠋", "⠙", "⠹", "⠸", "⠼", "⠴", "⠦", "⠧", "⠇", "⠏"}
const (
spinnerInterval = 80 * time.Millisecond
spinnerHideCursor = "\x1b[?25l"
spinnerShowCursor = "\x1b[?25h"
spinnerClearLine = "\r\x1b[K" // CR + clear-to-end-of-line
)
// StartSpinner renders a braille spinner with an elapsed-seconds counter to w
// until the returned stop() is called, e.g.:
//
// ⠹ Publishing dev → main... 3s
//
// It is meant for slow operations (long polls, first-time provisioning) so the
// user sees the CLI is alive. Always write to STDERR (w = IO().ErrOut) so the
// animation never pollutes stdout — the JSON/pretty result stays clean.
//
// When enabled is false (stderr is not a TTY: pipes, CI, captured output) it is
// a no-op returning a no-op stop, so non-interactive runs emit nothing. Gate on
// the stderr-TTY check (IOStreams.StderrIsTerminal), not the output format: the
// spinner is stderr-only and self-clears, so it is shown in JSON mode too.
//
// stop() clears the spinner line, restores the cursor, and blocks until the
// render goroutine has finished — so callers can safely write the result to
// stdout/stderr immediately after. Call stop() BEFORE printing the result, and
// it is safe to call more than once (e.g. an explicit call plus a defer).
func StartSpinner(w io.Writer, enabled bool, label string) func() {
if !enabled || w == nil {
return func() {}
}
done := make(chan struct{})
finished := make(chan struct{})
start := time.Now()
go func() {
defer close(finished)
frame := 0
fmt.Fprint(w, spinnerHideCursor)
render := func() {
elapsed := int(time.Since(start).Seconds())
fmt.Fprintf(w, "%s%s %s... %ds", spinnerClearLine, spinnerFrames[frame], label, elapsed)
frame = (frame + 1) % len(spinnerFrames)
}
render()
ticker := time.NewTicker(spinnerInterval)
defer ticker.Stop()
for {
select {
case <-done:
fmt.Fprint(w, spinnerClearLine+spinnerShowCursor)
return
case <-ticker.C:
render()
}
}
}()
var once sync.Once
return func() {
once.Do(func() {
close(done)
<-finished // wait for the line to be cleared before returning
})
}
}