/
io.go
131 lines (116 loc) · 2.79 KB
/
io.go
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package engine
import (
"bytes"
"context"
"errors"
"io"
"log"
"os"
"strings"
"time"
"github.com/atscan/atr/cli"
"github.com/atscan/atr/repo"
"github.com/klauspost/compress/zstd"
"github.com/schollz/progressbar/v3"
)
func Load(ctx *cli.Context, fn string) (repo.RepoSnapshot, error) {
var ss repo.RepoSnapshot
var err error
if strings.HasSuffix(fn, ".car.zst") {
ss, err = LoadCompressed(ctx, fn)
} else if strings.HasSuffix(fn, ".car") {
ss, err = LoadRaw(ctx, fn)
}
if err != nil {
log.Fatal("Cannot load: ", fn)
return ss, errors.New("Cannot load")
}
ss.File = fn
return ss, nil
}
func LoadRaw(ctx *cli.Context, fn string) (repo.RepoSnapshot, error) {
stat, err := os.Stat(fn)
if err != nil {
return repo.RepoSnapshot{}, err
}
dat, err := os.Open(fn)
if err != nil {
return repo.RepoSnapshot{}, err
}
defer dat.Close()
if err != nil {
return repo.RepoSnapshot{}, err
}
return LoadFromStream(ctx, dat, stat.Size())
}
func LoadCompressed(ctx *cli.Context, fn string) (repo.RepoSnapshot, error) {
dat, err := os.Open(fn)
if err != nil {
return repo.RepoSnapshot{}, err
}
defer dat.Close()
if err != nil {
return repo.RepoSnapshot{}, err
}
decoder, _ := zstd.NewReader(dat)
return LoadFromStream(ctx, decoder, -1)
}
func LoadFromStream(ctx *cli.Context, input io.Reader, sz int64) (repo.RepoSnapshot, error) {
ss, err := LoadRepoFromStream(ctx, input, sz)
if err != nil {
return ss, err
}
ss.Root = ss.Repo.Head()
return ss, nil
}
func LoadRepoFromStream(ctx *cli.Context, input io.Reader, sz int64) (repo.RepoSnapshot, error) {
rctx := context.TODO()
ss := repo.RepoSnapshot{}
var bar *progressbar.ProgressBar
if sz > 150_000_000 && !ctx.Raw {
bar = progressbar.NewOptions(int(sz),
progressbar.OptionSetDescription("loading"),
progressbar.OptionSetWriter(os.Stderr),
progressbar.OptionShowBytes(true),
//progressbar.OptionSetWidth(10),
progressbar.OptionThrottle(35*time.Millisecond),
progressbar.OptionShowCount(),
//progressbar.OptionOnCompletion(func() {
//}),
//progressbar.OptionSpinnerType(14),
//progressbar.OptionFullWidth(),
//progressbar.OptionUseANSICodes(true),
progressbar.OptionSetRenderBlankState(false),
/*progressbar.OptionSetTheme(progressbar.Theme{
Saucer: "=",
SaucerHead: ">",
SaucerPadding: " ",
BarStart: "[",
BarEnd: "]",
}),*/
)
ctx.ProgressBar = bar
}
buf := new(bytes.Buffer)
var err error
var size int64
if bar != nil {
size, err = io.Copy(io.MultiWriter(buf, bar), input)
} else {
size, err = io.Copy(buf, input)
}
if err != nil {
log.Fatal(err)
}
ss.Size = int(size)
if bar != nil {
defer bar.Finish()
defer bar.Clear()
}
r, err := repo.ReadRepoFromCar(rctx, buf)
if err != nil {
return ss, err
}
ss.Repo = *r
return ss, nil
}