forked from mirrors/tar-split
111 lines
1.9 KiB
Go
111 lines
1.9 KiB
Go
// +build ignore
|
|
|
|
package main
|
|
|
|
import (
|
|
"archive/tar"
|
|
"compress/gzip"
|
|
"flag"
|
|
"fmt"
|
|
"io"
|
|
"io/ioutil"
|
|
"log"
|
|
"os"
|
|
|
|
"github.com/vbatts/tar-split/tar/asm"
|
|
"github.com/vbatts/tar-split/tar/storage"
|
|
)
|
|
|
|
var (
|
|
flCleanup = flag.Bool("cleanup", true, "cleanup tempfiles")
|
|
)
|
|
|
|
func main() {
|
|
flag.Parse()
|
|
|
|
for _, arg := range flag.Args() {
|
|
fh, err := os.Open(arg)
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
defer fh.Close()
|
|
fi, err := fh.Stat()
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
fmt.Printf("inspecting %q (size %dk)\n", fh.Name(), fi.Size()/1024)
|
|
|
|
packFh, err := ioutil.TempFile("", "packed.")
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
defer packFh.Close()
|
|
if *flCleanup {
|
|
defer os.Remove(packFh.Name())
|
|
}
|
|
|
|
sp := storage.NewJsonPacker(packFh)
|
|
fp := asm.NewDiscardFilePutter()
|
|
dissam, err := asm.NewInputTarStream(fh, sp, fp)
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
|
|
var num int
|
|
tr := tar.NewReader(dissam)
|
|
for {
|
|
_, err = tr.Next()
|
|
if err != nil {
|
|
if err == io.EOF {
|
|
break
|
|
}
|
|
log.Fatal(err)
|
|
}
|
|
num++
|
|
if _, err := io.Copy(ioutil.Discard, tr); err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
}
|
|
fmt.Printf(" -- number of files: %d\n", num)
|
|
|
|
if err := packFh.Sync(); err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
|
|
fi, err = packFh.Stat()
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
fmt.Printf(" -- size of metadata uncompressed: %dk\n", fi.Size()/1024)
|
|
|
|
gzPackFh, err := ioutil.TempFile("", "packed.gz.")
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
defer gzPackFh.Close()
|
|
if *flCleanup {
|
|
defer os.Remove(gzPackFh.Name())
|
|
}
|
|
|
|
gzWrtr := gzip.NewWriter(gzPackFh)
|
|
|
|
if _, err := packFh.Seek(0, 0); err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
|
|
if _, err := io.Copy(gzWrtr, packFh); err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
gzWrtr.Close()
|
|
|
|
if err := gzPackFh.Sync(); err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
|
|
fi, err = gzPackFh.Stat()
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
fmt.Printf(" -- size of gzip compressed metadata: %dk\n", fi.Size()/1024)
|
|
}
|
|
}
|