func getStatusPrinter(expected uint64) progressreader.Callback {
startTime := time.Now()
return func(seen uint64) {
percent := float64(seen) / float64(expected) * 100
elapsed := time.Now().Sub(startTime)
rate := float64(seen) / elapsed.Seconds()
status.Printf("%.2f%% of %s (%s/s)...",
percent,
humanize.Bytes(expected),
humanize.Bytes(uint64(rate)))
}
}
func main() {
flag.Usage = func() {
fmt.Fprintf(os.Stderr, "usage: %s <dataset> <file>\n", os.Args[0])
flag.PrintDefaults()
}
spec.RegisterDatabaseFlags(flag.CommandLine)
flag.Parse(true)
if len(flag.Args()) != 2 {
d.CheckError(errors.New("expected dataset and file flags"))
}
var blob types.Blob
path := flag.Arg(0)
if db, val, err := spec.GetPath(path); err != nil {
d.CheckErrorNoUsage(err)
} else if val == nil {
d.CheckErrorNoUsage(fmt.Errorf("No value at %s", path))
} else if b, ok := val.(types.Blob); !ok {
d.CheckErrorNoUsage(fmt.Errorf("Value at %s is not a blob", path))
} else {
defer db.Close()
blob = b
}
filePath := flag.Arg(1)
if filePath == "" {
d.CheckErrorNoUsage(errors.New("Empty file path"))
}
// Note: overwrites any existing file.
file, err := os.OpenFile(filePath, os.O_WRONLY|os.O_CREATE, 0644)
d.CheckErrorNoUsage(err)
defer file.Close()
expected := humanize.Bytes(blob.Len())
start := time.Now()
progReader := progressreader.New(blob.Reader(), func(seen uint64) {
elapsed := time.Since(start).Seconds()
rate := uint64(float64(seen) / elapsed)
status.Printf("%s of %s written in %ds (%s/s)...", humanize.Bytes(seen), expected, int(elapsed), humanize.Bytes(rate))
})
io.Copy(file, progReader)
status.Done()
}
func getStatusPrinter(expectedLen int64) progressreader.Callback {
return func(seenLen uint64) {
var expected string
if expectedLen < 0 {
expected = "(unknown)"
} else {
expected = human.Bytes(uint64(expectedLen))
}
elapsed := time.Now().Sub(start)
rate := uint64(float64(seenLen) / elapsed.Seconds())
status.Printf("%s of %s written in %ds (%s/s)...",
human.Bytes(seenLen),
expected,
uint64(elapsed.Seconds()),
human.Bytes(rate))
}
}
func formatStatus(acc diffSummaryProgress, singular, plural string) {
pluralize := func(singular, plural string, n uint64) string {
var noun string
if n != 1 {
noun = plural
} else {
noun = singular
}
return fmt.Sprintf("%s %s", humanize.Comma(int64(n)), noun)
}
insertions := pluralize("insertion", "insertions", acc.Adds)
deletions := pluralize("deletion", "deletions", acc.Removes)
changes := pluralize("change", "changes", acc.Changes)
oldValues := pluralize(singular, plural, acc.OldSize)
newValues := pluralize(singular, plural, acc.NewSize)
status.Printf("%s (%.2f%%), %s (%.2f%%), %s (%.2f%%), (%s vs %s)", insertions, (float64(100*acc.Adds) / float64(acc.OldSize)), deletions, (float64(100*acc.Removes) / float64(acc.OldSize)), changes, (float64(100*acc.Changes) / float64(acc.OldSize)), oldValues, newValues)
}