84 lines
1.8 KiB
Go
84 lines
1.8 KiB
Go
package update
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import (
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"context"
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"encoding/json"
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"errors"
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"fmt"
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"io"
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"runtime"
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)
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const (
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repoOwner = "mathismqn"
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repoName = "godeez"
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latestReleaseURL = "https://api.github.com/repos/" + repoOwner + "/" + repoName + "/releases/latest"
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checksumsAsset = "checksums.txt"
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maxResponseSize = 1 << 20
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)
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var githubAPIHeaders = map[string]string{
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"Accept": "application/vnd.github+json",
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"X-GitHub-Api-Version": "2022-11-28",
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}
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type Release struct {
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TagName string `json:"tag_name"`
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Assets []Asset `json:"assets"`
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}
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type Asset struct {
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Name string `json:"name"`
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URL string `json:"browser_download_url"`
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}
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func (u *Updater) Latest(ctx context.Context) (*Release, error) {
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ctx, cancel := context.WithTimeout(ctx, apiTimeout)
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defer cancel()
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body, err := u.get(ctx, latestReleaseURL, githubAPIHeaders)
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if err != nil {
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return nil, err
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}
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defer body.Close()
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var release Release
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if err := json.NewDecoder(io.LimitReader(body, maxResponseSize)).Decode(&release); err != nil {
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return nil, fmt.Errorf("failed to decode release: %w", err)
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}
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if release.TagName == "" {
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return nil, errors.New("release has no tag name")
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}
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return &release, nil
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}
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func (r *Release) Version() string {
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return trimV(r.TagName)
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}
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func (r *Release) asset(name string) (Asset, bool) {
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for _, a := range r.Assets {
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if a.Name == name {
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return a, true
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}
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}
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return Asset{}, false
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}
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func (r *Release) assetForRuntime() (Asset, error) {
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name := fmt.Sprintf("%s_%s_%s_%s", repoName, r.Version(), runtime.GOOS, runtime.GOARCH)
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if runtime.GOOS == "windows" {
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name += ".exe"
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}
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asset, ok := r.asset(name)
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if !ok {
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return Asset{}, fmt.Errorf("release %s has no binary for %s/%s (expected %s)",
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r.TagName, runtime.GOOS, runtime.GOARCH, name)
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}
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return asset, nil
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}
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