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// Copyright 2024 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package repository
import (
"context"
"fmt"
"io"
"code.gitea.io/gitea/models/db"
repo_model "code.gitea.io/gitea/models/repo"
"code.gitea.io/gitea/modules/container"
"code.gitea.io/gitea/modules/git"
"code.gitea.io/gitea/modules/gitrepo"
"code.gitea.io/gitea/modules/graceful"
"code.gitea.io/gitea/modules/json"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/options"
"code.gitea.io/gitea/modules/queue"
licenseclassifier "github.com/google/licenseclassifier/v2"
)
var (
classifier *licenseclassifier.Classifier
LicenseFileName = "LICENSE"
licenseAliases map[string]string
// licenseUpdaterQueue represents a queue to handle update repo licenses
licenseUpdaterQueue *queue.WorkerPoolQueue[*LicenseUpdaterOptions]
)
func AddRepoToLicenseUpdaterQueue(opts *LicenseUpdaterOptions) error {
if opts == nil {
return nil
}
return licenseUpdaterQueue.Push(opts)
}
func loadLicenseAliases() error {
if licenseAliases != nil {
return nil
}
data, err := options.AssetFS().ReadFile("license", "etc", "license-aliases.json")
if err != nil {
return err
}
err = json.Unmarshal(data, &licenseAliases)
if err != nil {
return err
}
return nil
}
func ConvertLicenseName(name string) string {
if err := loadLicenseAliases(); err != nil {
return name
}
v, ok := licenseAliases[name]
if ok {
return v
}
return name
}
func InitLicenseClassifier() error {
// threshold should be 0.84~0.86 or the test will be failed
classifier = licenseclassifier.NewClassifier(.85)
licenseFiles, err := options.AssetFS().ListFiles("license", true)
if err != nil {
return err
}
existLicense := make(container.Set[string])
if len(licenseFiles) > 0 {
for _, licenseFile := range licenseFiles {
licenseName := ConvertLicenseName(licenseFile)
if existLicense.Contains(licenseName) {
continue
}
existLicense.Add(licenseName)
data, err := options.License(licenseFile)
if err != nil {
return err
}
classifier.AddContent("License", licenseFile, licenseName, data)
}
}
return nil
}
type LicenseUpdaterOptions struct {
RepoID int64
}
func repoLicenseUpdater(items ...*LicenseUpdaterOptions) []*LicenseUpdaterOptions {
ctx := graceful.GetManager().ShutdownContext()
for _, opts := range items {
repo, err := repo_model.GetRepositoryByID(ctx, opts.RepoID)
if err != nil {
log.Error("repoLicenseUpdater [%d] failed: GetRepositoryByID: %v", opts.RepoID, err)
continue
}
if repo.IsEmpty {
continue
}
gitRepo, err := gitrepo.OpenRepository(ctx, repo)
if err != nil {
log.Error("repoLicenseUpdater [%d] failed: OpenRepository: %v", opts.RepoID, err)
continue
}
defer gitRepo.Close()
commit, err := gitRepo.GetBranchCommit(repo.DefaultBranch)
if err != nil {
log.Error("repoLicenseUpdater [%d] failed: GetBranchCommit: %v", opts.RepoID, err)
continue
}
if err = UpdateRepoLicenses(ctx, repo, commit); err != nil {
log.Error("repoLicenseUpdater [%d] failed: updateRepoLicenses: %v", opts.RepoID, err)
}
}
return nil
}
func SyncRepoLicenses(ctx context.Context) error {
log.Trace("Doing: SyncRepoLicenses")
if err := db.Iterate(
ctx,
nil,
func(ctx context.Context, repo *repo_model.Repository) error {
select {
case <-ctx.Done():
return db.ErrCancelledf("before sync repo licenses for %s", repo.FullName())
default:
}
return AddRepoToLicenseUpdaterQueue(&LicenseUpdaterOptions{RepoID: repo.ID})
},
); err != nil {
log.Trace("Error: SyncRepoLicenses: %v", err)
return err
}
log.Trace("Finished: SyncReposLicenses")
return nil
}
// UpdateRepoLicenses will update repository licenses col if license file exists
func UpdateRepoLicenses(ctx context.Context, repo *repo_model.Repository, commit *git.Commit) error {
if commit == nil {
return nil
}
b, err := commit.GetBlobByPath(LicenseFileName)
if err != nil && !git.IsErrNotExist(err) {
return fmt.Errorf("GetBlobByPath: %w", err)
}
if git.IsErrNotExist(err) {
return repo_model.CleanRepoLicenses(ctx, repo)
}
licenses := make([]string, 0)
if b != nil {
r, err := b.DataAsync()
if err != nil {
return err
}
defer r.Close()
licenses, err = detectLicense(r)
if err != nil {
return fmt.Errorf("detectLicense: %w", err)
}
}
return repo_model.UpdateRepoLicenses(ctx, repo, commit.ID.String(), licenses)
}
// detectLicense returns the licenses detected by the given content buff
func detectLicense(r io.Reader) ([]string, error) {
if r == nil {
return nil, nil
}
matches, err := classifier.MatchFrom(r)
if err != nil {
return nil, err
}
if len(matches.Matches) > 0 {
results := make(container.Set[string], len(matches.Matches))
for _, r := range matches.Matches {
if r.MatchType == "License" && !results.Contains(r.Variant) {
results.Add(r.Variant)
}
}
return results.Values(), nil
}
return nil, nil
}
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