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package main
import (
"compress/gzip"
"io"
"os"
"github.com/sirupsen/logrus"
"github.com/urfave/cli"
"github.com/vbatts/tar-split/tar/asm"
"github.com/vbatts/tar-split/tar/storage"
)
func CommandAsm(c *cli.Context) {
if len(c.Args()) > 0 {
logrus.Warnf("%d additional arguments passed are ignored", len(c.Args()))
}
if len(c.String("input")) == 0 {
logrus.Fatalf("--input filename must be set")
}
if len(c.String("output")) == 0 {
logrus.Fatalf("--output filename must be set ([FILENAME|-])")
}
if len(c.String("path")) == 0 {
logrus.Fatalf("--path must be set")
}
var outputStream io.Writer
if c.String("output") == "-" {
outputStream = os.Stdout
} else {
fh, err := os.Create(c.String("output"))
if err != nil {
logrus.Fatal(err)
}
defer fh.Close()
outputStream = fh
}
if c.Bool("compress") {
zipper := gzip.NewWriter(outputStream)
defer zipper.Close()
outputStream = zipper
}
// Get the tar metadata reader
mf, err := os.Open(c.String("input"))
if err != nil {
logrus.Fatal(err)
}
defer mf.Close()
mfz, err := gzip.NewReader(mf)
if err != nil {
logrus.Fatal(err)
}
defer mfz.Close()
metaUnpacker := storage.NewJSONUnpacker(mfz)
// XXX maybe get the absolute path here
fileGetter := storage.NewPathFileGetter(c.String("path"))
ots := asm.NewOutputTarStream(fileGetter, metaUnpacker)
defer ots.Close()
i, err := io.Copy(outputStream, ots)
if err != nil {
logrus.Fatal(err)
}
logrus.Infof("created %s from %s and %s (wrote %d bytes)", c.String("output"), c.String("path"), c.String("input"), i)
}
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