mirror of
https://github.com/MedzikUser/go-github-selfupdate.git
synced 2024-08-15 03:25:29 +00:00
115 lines
2.7 KiB
Go
115 lines
2.7 KiB
Go
package selfupdate
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import (
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"archive/tar"
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"archive/zip"
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"bytes"
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"compress/gzip"
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"fmt"
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"github.com/blang/semver"
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"github.com/inconshreveable/go-update"
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"io"
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"io/ioutil"
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"net/http"
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"os"
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"path/filepath"
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"strings"
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)
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func uncompress(src io.ReadCloser, url, cmd string) (io.Reader, error) {
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if strings.HasSuffix(url, ".zip") {
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// Zip format requires its file size for uncompressing.
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// So we need to read the HTTP response into a buffer at first.
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buf, err := ioutil.ReadAll(src)
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if err != nil {
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return nil, err
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}
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r := bytes.NewReader(buf)
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z, err := zip.NewReader(r, r.Size())
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if err != nil {
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return nil, err
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}
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for _, file := range z.File {
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if file.Name == cmd {
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return file.Open()
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}
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}
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return nil, fmt.Errorf("File '%s' for the command is not found in %s", cmd, url)
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} else if strings.HasSuffix(url, ".gzip") {
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return gzip.NewReader(src)
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} else if strings.HasSuffix(url, ".tar.gz") {
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gz, err := gzip.NewReader(src)
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if err != nil {
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return nil, err
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}
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t := tar.NewReader(gz)
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for {
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h, err := t.Next()
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if err == io.EOF {
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break
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}
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if err != nil {
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return nil, err
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}
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if h.Name == cmd {
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return t, nil
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}
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}
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return nil, fmt.Errorf("File '%s' for the command is not found in %s", cmd, url)
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}
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return src, nil
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}
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// UpdateTo download an executable from assetURL and replace the current binary with the downloaded one. cmdPath is a file path to command executable.
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func UpdateTo(assetURL, cmdPath string) error {
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res, err := http.Get(assetURL)
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if err != nil {
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return err
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}
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if res.StatusCode != 200 {
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return fmt.Errorf("Failed to download a release file from %s ", assetURL)
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}
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defer res.Body.Close()
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_, cmd := filepath.Split(cmdPath)
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asset, err := uncompress(res.Body, assetURL, cmd)
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if err != nil {
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return err
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}
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return update.Apply(asset, update.Options{
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TargetPath: cmdPath,
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})
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}
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// UpdateCommand updates a given command binary to the latest version.
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// 'slug' represents 'owner/name' repository on GitHub and 'current' means the current version.
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func UpdateCommand(cmdPath string, current semver.Version, slug string) (*Release, error) {
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rel, ok, err := DetectLatest(slug)
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if err != nil {
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return nil, err
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}
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if !ok {
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return &Release{Version: current}, nil
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}
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if current.Equals(rel.Version) {
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return rel, nil
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}
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if err := UpdateTo(rel.AssetURL, cmdPath); err != nil {
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return nil, err
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}
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return rel, nil
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}
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// UpdateSelf updates the running executable itself to the latest version.
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// 'slug' represents 'owner/name' repository on GitHub and 'current' means the current version.
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func UpdateSelf(current semver.Version, slug string) (*Release, error) {
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return UpdateCommand(os.Args[0], current, slug)
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}
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