129 lines
3.1 KiB
Go
129 lines
3.1 KiB
Go
//go:build windows
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// +build windows
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package wsl
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import (
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"errors"
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"fmt"
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"io"
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"net/http"
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"net/url"
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"os"
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"path"
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"path/filepath"
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"strings"
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"time"
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"github.com/containers/podman/v4/pkg/machine"
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)
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const (
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githubX86ReleaseURL = "https://github.com/containers/podman-wsl-fedora/releases/latest/download/rootfs.tar.xz"
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githubArmReleaseURL = "https://github.com/containers/podman-wsl-fedora-arm/releases/latest/download/rootfs.tar.xz"
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)
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type FedoraDownload struct {
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machine.Download
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}
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func NewFedoraDownloader(vmType machine.VMType, vmName, releaseStream string) (machine.DistributionDownload, error) {
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downloadURL, version, arch, size, err := getFedoraDownload()
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if err != nil {
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return nil, err
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}
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cacheDir, err := machine.GetCacheDir(vmType)
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if err != nil {
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return nil, err
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}
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imageName := fmt.Sprintf("fedora-podman-%s-%s.tar.xz", arch, version)
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f := FedoraDownload{
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Download: machine.Download{
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Arch: machine.GetFcosArch(),
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Artifact: machine.None,
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CacheDir: cacheDir,
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Format: machine.Tar,
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ImageName: imageName,
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LocalPath: filepath.Join(cacheDir, imageName),
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URL: downloadURL,
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VMName: vmName,
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Size: size,
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},
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}
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dataDir, err := machine.GetDataDir(vmType)
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if err != nil {
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return nil, err
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}
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f.Download.LocalUncompressedFile = f.GetLocalUncompressedFile(dataDir)
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return f, nil
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}
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func (f FedoraDownload) Get() *machine.Download {
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return &f.Download
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}
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func (f FedoraDownload) HasUsableCache() (bool, error) {
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info, err := os.Stat(f.LocalPath)
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if err != nil {
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if errors.Is(err, os.ErrNotExist) {
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return false, nil
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}
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return false, err
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}
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return info.Size() == f.Size, nil
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}
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func (f FedoraDownload) CleanCache() error {
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// Set cached image to expire after 2 weeks
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expire := 14 * 24 * time.Hour
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return machine.RemoveImageAfterExpire(f.CacheDir, expire)
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}
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func getFedoraDownload() (*url.URL, string, string, int64, error) {
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var releaseURL string
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arch := machine.DetermineMachineArch()
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switch arch {
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case "arm64":
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releaseURL = githubArmReleaseURL
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case "amd64":
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releaseURL = githubX86ReleaseURL
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default:
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return nil, "", "", -1, fmt.Errorf("CPU architecture %q is not supported", arch)
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}
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downloadURL, err := url.Parse(releaseURL)
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if err != nil {
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return nil, "", "", -1, fmt.Errorf("invalid URL generated from discovered Fedora file: %s: %w", releaseURL, err)
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}
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resp, err := http.Head(releaseURL)
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if err != nil {
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return nil, "", "", -1, fmt.Errorf("head request failed: %s: %w", releaseURL, err)
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}
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_ = resp.Body.Close()
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contentLen := resp.ContentLength
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if resp.StatusCode != http.StatusOK {
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return nil, "", "", -1, fmt.Errorf("head request failed: %s: %w", releaseURL, err)
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}
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verURL := *downloadURL
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verURL.Path = path.Join(path.Dir(downloadURL.Path), "version")
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resp, err = http.Get(verURL.String())
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if err != nil {
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return nil, "", "", -1, fmt.Errorf("get request failed: %s: %w", verURL.String(), err)
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}
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defer resp.Body.Close()
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bytes, err := io.ReadAll(&io.LimitedReader{R: resp.Body, N: 1024})
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if err != nil {
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return nil, "", "", -1, fmt.Errorf("failed reading: %s: %w", verURL.String(), err)
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}
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return downloadURL, strings.TrimSpace(string(bytes)), arch, contentLen, nil
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}
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