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package machine
import (
"encoding/json"
"fmt"
"io/ioutil"
"net/http"
"github.com/coreos/stream-metadata-go/fedoracoreos"
"github.com/coreos/stream-metadata-go/stream"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
// This should get Exported and stay put as it will apply to all fcos downloads
// getFCOS parses fedoraCoreOS's stream and returns the image download URL and the release version
func getFCOSDownload(imageStream string) (*fcosDownloadInfo, error) {
var (
fcosstable stream.Stream
streamType string
)
switch imageStream {
case "testing", "":
streamType = fedoracoreos.StreamNext
case "stable":
streamType = fedoracoreos.StreamStable
default:
return nil, errors.Errorf("invalid stream %s: valid streams are `testing` and `stable`", imageStream)
}
streamurl := fedoracoreos.GetStreamURL(streamType)
resp, err := http.Get(streamurl.String())
if err != nil {
return nil, err
}
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
return nil, err
}
defer func() {
if err := resp.Body.Close(); err != nil {
logrus.Error(err)
}
}()
if err := json.Unmarshal(body, &fcosstable); err != nil {
return nil, err
}
arch, ok := fcosstable.Architectures[getFcosArch()]
if !ok {
return nil, fmt.Errorf("unable to pull VM image: no targetArch in stream")
}
artifacts := arch.Artifacts
if artifacts == nil {
return nil, fmt.Errorf("unable to pull VM image: no artifact in stream")
}
qemu, ok := artifacts[artifact]
if !ok {
return nil, fmt.Errorf("unable to pull VM image: no qemu artifact in stream")
}
formats := qemu.Formats
if formats == nil {
return nil, fmt.Errorf("unable to pull VM image: no formats in stream")
}
qcow, ok := formats[Format]
if !ok {
return nil, fmt.Errorf("unable to pull VM image: no qcow2.xz format in stream")
}
disk := qcow.Disk
if disk == nil {
return nil, fmt.Errorf("unable to pull VM image: no disk in stream")
}
return &fcosDownloadInfo{
Location: disk.Location,
Release: qemu.Release,
Sha256Sum: disk.Sha256,
CompressionType: "xz",
}, nil
}
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