mirror of
https://github.com/MedzikUser/go-github-selfupdate.git
synced 2024-08-15 03:25:29 +00:00
181 lines
6.5 KiB
Go
181 lines
6.5 KiB
Go
package selfupdate
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import (
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"bytes"
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"fmt"
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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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"runtime"
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"strings"
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"github.com/blang/semver/v4"
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"github.com/inconshreveable/go-update"
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)
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func uncompressAndUpdate(src io.Reader, assetURL, cmdPath, cmdName string) error {
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asset, err := UncompressCommand(src, assetURL, cmdName)
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if err != nil {
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return err
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}
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log.Println("Will update", cmdPath, "to the latest downloaded from", assetURL)
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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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func (up *Updater) downloadDirectlyFromURL(assetURL string) (io.ReadCloser, error) {
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req, err := http.NewRequest("GET", assetURL, nil)
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if err != nil {
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return nil, fmt.Errorf("Failed to create HTTP request to %s: %s", assetURL, err)
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}
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req.Header.Add("Accept", "application/octet-stream")
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req = req.WithContext(up.apiCtx)
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// OAuth HTTP client is not available to download blob from URL when the URL is a redirect URL
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// returned from GitHub Releases API (response status 400).
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// Use default HTTP client instead.
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res, err := http.DefaultClient.Do(req)
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if err != nil {
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return nil, fmt.Errorf("Failed to download a release file from %s: %s", assetURL, err)
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}
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if res.StatusCode != 200 {
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return nil, fmt.Errorf("Failed to download a release file from %s: Not successful status %d", assetURL, res.StatusCode)
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}
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return res.Body, nil
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}
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// UpdateTo downloads an executable from GitHub Releases API and replace current binary with the downloaded one.
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// It downloads a release asset via GitHub Releases API so this function is available for update releases on private repository.
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// If a redirect occurs, it fallbacks into directly downloading from the redirect URL.
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func (up *Updater) UpdateTo(rel *Release, cmdPath, cmdName string) error {
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var client http.Client
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src, redirectURL, err := up.api.Repositories.DownloadReleaseAsset(up.apiCtx, rel.RepoOwner, rel.RepoName, rel.AssetID, &client)
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if err != nil {
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return fmt.Errorf("Failed to call GitHub Releases API for getting an asset(ID: %d) for repository '%s/%s': %s", rel.AssetID, rel.RepoOwner, rel.RepoName, err)
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}
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if redirectURL != "" {
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log.Println("Redirect URL was returned while trying to download a release asset from GitHub API. Falling back to downloading from asset URL directly:", redirectURL)
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src, err = up.downloadDirectlyFromURL(redirectURL)
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if err != nil {
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return err
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}
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}
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defer src.Close()
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data, err := ioutil.ReadAll(src)
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if err != nil {
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return fmt.Errorf("Failed reading asset body: %v", err)
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}
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if up.validator == nil {
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return uncompressAndUpdate(bytes.NewReader(data), rel.AssetURL, cmdPath, cmdName)
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}
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validationSrc, validationRedirectURL, err := up.api.Repositories.DownloadReleaseAsset(up.apiCtx, rel.RepoOwner, rel.RepoName, rel.ValidationAssetID, &client)
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if err != nil {
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return fmt.Errorf("Failed to call GitHub Releases API for getting an validation asset(ID: %d) for repository '%s/%s': %s", rel.ValidationAssetID, rel.RepoOwner, rel.RepoName, err)
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}
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if validationRedirectURL != "" {
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log.Println("Redirect URL was returned while trying to download a release validation asset from GitHub API. Falling back to downloading from asset URL directly:", redirectURL)
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validationSrc, err = up.downloadDirectlyFromURL(validationRedirectURL)
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if err != nil {
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return err
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}
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}
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defer validationSrc.Close()
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validationData, err := ioutil.ReadAll(validationSrc)
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if err != nil {
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return fmt.Errorf("Failed reading validation asset body: %v", err)
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}
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if err := up.validator.Validate(data, validationData); err != nil {
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return fmt.Errorf("Failed validating asset content: %v", err)
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}
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return uncompressAndUpdate(bytes.NewReader(data), rel.AssetURL, cmdPath, cmdName)
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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 (up *Updater) UpdateCommand(cmdPath string, current semver.Version, slug string) (*Release, error) {
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if runtime.GOOS == "windows" && !strings.HasSuffix(cmdPath, ".exe") {
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// Ensure to add '.exe' to given path on Windows
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cmdPath = cmdPath + ".exe"
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}
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stat, err := os.Lstat(cmdPath)
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if err != nil {
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return nil, fmt.Errorf("Failed to stat '%s'. File may not exist: %s", cmdPath, err)
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}
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if stat.Mode()&os.ModeSymlink != 0 {
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p, err := filepath.EvalSymlinks(cmdPath)
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if err != nil {
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return nil, fmt.Errorf("Failed to resolve symlink '%s' for executable: %s", cmdPath, err)
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}
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cmdPath = p
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}
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rel, ok, err := up.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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log.Println("No release detected. Current version is considered up-to-date")
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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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log.Println("Current version", current, "is the latest. Update is not needed")
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return rel, nil
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}
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log.Println("Will update", cmdPath, "to the latest version", rel.Version)
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_, cmdName := filepath.Split(cmdPath)
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if err := up.UpdateTo(rel, cmdPath, cmdName); 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 (up *Updater) UpdateSelf(current semver.Version, slug string) (*Release, error) {
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cmdPath, err := os.Executable()
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if err != nil {
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return nil, err
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}
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return up.UpdateCommand(cmdPath, current, slug)
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}
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// UpdateTo downloads an executable from assetURL and replace the current binary with the downloaded one.
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// This function is low-level API to update the binary. Because it does not use GitHub API and downloads asset directly from the URL via HTTP,
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// this function is not available to update a release for private repositories.
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// cmdPath is a file path to command executable.
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func UpdateTo(assetURL, cmdPath, cmdName string) error {
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up := DefaultUpdater()
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src, err := up.downloadDirectlyFromURL(assetURL)
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if err != nil {
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return err
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}
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defer src.Close()
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return uncompressAndUpdate(src, assetURL, cmdPath, cmdName)
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}
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// UpdateCommand updates a given command binary to the latest version.
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// This function is a shortcut version of updater.UpdateCommand.
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func UpdateCommand(cmdPath string, current semver.Version, slug string) (*Release, error) {
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return DefaultUpdater().UpdateCommand(cmdPath, current, slug)
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}
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// UpdateSelf updates the running executable itself to the latest version.
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// This function is a shortcut version of updater.UpdateSelf.
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func UpdateSelf(current semver.Version, slug string) (*Release, error) {
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return DefaultUpdater().UpdateSelf(current, slug)
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}
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