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github.go
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github.go
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package github
import (
"context"
"fmt"
"io"
"net/http"
"os"
"regexp"
"runtime"
"sort"
"strings"
"github.com/Masterminds/semver/v3"
"github.com/go-semantic-release/semantic-release/v2/pkg/plugin"
"github.com/go-semantic-release/semantic-release/v2/pkg/plugin/discovery/resolver"
"github.com/google/go-github/v49/github"
"golang.org/x/oauth2"
)
type Resolver struct {
ghClient *github.Client
}
func NewResolver() *Resolver {
var tc *http.Client
if ghToken := os.Getenv("GITHUB_TOKEN"); ghToken != "" {
tc = oauth2.NewClient(context.Background(), oauth2.StaticTokenSource(&oauth2.Token{AccessToken: ghToken}))
}
return &Resolver{
ghClient: github.NewClient(tc),
}
}
//gocyclo:ignore
func (g *Resolver) githubReleaseToDownloadInfo(repoOwner, repoName string, release *github.RepositoryRelease) (*resolver.PluginDownloadInfo, error) {
var checksumAsset *github.ReleaseAsset
var pluginAsset *github.ReleaseAsset
osArchRe := regexp.MustCompile("(?i)" + runtime.GOOS + "(_|-)" + runtime.GOARCH)
for _, asset := range release.Assets {
assetName := asset.GetName()
if checksumAsset == nil && asset.GetSize() <= 4096 && strings.Contains(strings.ToLower(assetName), "checksum") {
checksumAsset = asset
}
if pluginAsset == nil && osArchRe.MatchString(assetName) {
pluginAsset = asset
}
}
if pluginAsset == nil {
return nil, fmt.Errorf("no matching plugin binary was found for %s/%s", runtime.GOOS, runtime.GOARCH)
}
foundChecksum := ""
if checksumAsset != nil {
checksumDownload, _, err := g.ghClient.Repositories.DownloadReleaseAsset(context.Background(), repoOwner, repoName, checksumAsset.GetID(), http.DefaultClient)
if err != nil {
return nil, err
}
checksumData, err := io.ReadAll(checksumDownload)
checksumDownload.Close()
if err != nil {
return nil, err
}
for _, l := range strings.Split(string(checksumData), "\n") {
sl := strings.Split(l, " ")
if len(sl) < 3 {
continue
}
if sl[2] == pluginAsset.GetName() {
foundChecksum = sl[0]
}
}
}
return &resolver.PluginDownloadInfo{
URL: pluginAsset.GetBrowserDownloadURL(),
Checksum: foundChecksum,
FileName: pluginAsset.GetName(),
Version: strings.TrimLeft(release.GetTagName(), "v"),
}, nil
}
type ghRelease struct {
version *semver.Version
release *github.RepositoryRelease
}
type ghReleases []*ghRelease
func (gr ghReleases) Len() int { return len(gr) }
func (gr ghReleases) Less(i, j int) bool { return gr[j].version.LessThan(gr[i].version) }
func (gr ghReleases) Swap(i, j int) { gr[i], gr[j] = gr[j], gr[i] }
func (g *Resolver) getAllValidGitHubReleases(repoOwner, repoName string) (ghReleases, error) {
ret := make(ghReleases, 0)
opts := &github.ListOptions{Page: 1, PerPage: 100}
for {
releases, resp, err := g.ghClient.Repositories.ListReleases(context.Background(), repoOwner, repoName, opts)
if err != nil {
return nil, err
}
for _, release := range releases {
if release.GetDraft() {
continue
}
if semverTag, err := semver.NewVersion(release.GetTagName()); err == nil {
ret = append(ret, &ghRelease{version: semverTag, release: release})
}
}
if resp.NextPage == 0 {
break
}
opts.Page = resp.NextPage
}
sort.Sort(ret)
return ret, nil
}
func (g *Resolver) ResolvePlugin(pluginInfo *plugin.Info) (*resolver.PluginDownloadInfo, error) {
if pluginInfo.RepoSlug == "" {
pluginInfo.RepoSlug = knownPlugins[pluginInfo.ShortNormalizedName]
}
if pluginInfo.RepoSlug == "" {
return nil, fmt.Errorf("repo slug not found")
}
repoOwner, repoName, _ := strings.Cut(pluginInfo.RepoSlug, "/")
var foundRelease *github.RepositoryRelease
if pluginInfo.Constraint == nil {
release, _, err := g.ghClient.Repositories.GetLatestRelease(context.Background(), repoOwner, repoName)
if err != nil {
return nil, err
}
foundRelease = release
} else {
validReleases, err := g.getAllValidGitHubReleases(repoOwner, repoName)
if err != nil {
return nil, err
}
for _, release := range validReleases {
if pluginInfo.Constraint.Check(release.version) {
foundRelease = release.release
break
}
}
}
if foundRelease == nil {
return nil, fmt.Errorf("no matching release was found")
}
di, err := g.githubReleaseToDownloadInfo(repoOwner, repoName, foundRelease)
return di, err
}
func (g *Resolver) Names() []string {
return []string{"github", "gh"}
}