mugit/internal/mirror/mirror.go(view raw)
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package mirror
import (
"context"
"errors"
"fmt"
"log/slog"
"os"
"path/filepath"
"strings"
"sync"
"time"
"golang.org/x/sync/semaphore"
"olexsmir.xyz/mugit/internal/config"
"olexsmir.xyz/mugit/internal/git"
)
type Worker struct {
c *config.Config
}
func NewWorker(cfg *config.Config) *Worker {
return &Worker{
c: cfg,
}
}
func (w *Worker) Start(ctx context.Context) error {
interval, err := time.ParseDuration(w.c.Mirror.Interval)
if err != nil {
slog.Error("couldn't parse interval time", "err", err)
return err
}
ticker := time.NewTicker(interval)
defer ticker.Stop()
if err := w.mirror(ctx); err != nil {
slog.Error("initial mirror sync failed", "err", err)
}
for {
select {
case <-ctx.Done():
return nil
case <-ticker.C:
if err := w.mirror(ctx); err != nil {
slog.Error("mirror sync failed", "err", err)
}
}
}
}
func (w *Worker) mirror(ctx context.Context) error {
repos, err := w.findMirrorRepos()
if err != nil {
return err
}
var wg sync.WaitGroup
sem := semaphore.NewWeighted(5)
errCh := make(chan error, len(repos))
for _, repo := range repos {
wg.Go(func() {
if err := sem.Acquire(ctx, 1); err != nil {
errCh <- err
return
}
defer sem.Release(1)
if err := w.syncRepo(ctx, repo); err != nil {
errCh <- err
}
})
}
wg.Wait()
close(errCh)
var errs []error
for err := range errCh {
errs = append(errs, err)
}
return errors.Join(errs...)
}
func (w *Worker) syncRepo(_ context.Context, repo *git.Repo) error {
name := repo.Name()
slog.Info("mirror: sync started", "repo", name)
mi, err := repo.MirrorInfo()
if err != nil {
slog.Error("mirror: failed to get info", "repo", name, "err", err)
return err
}
if err := w.isRemoteValid(mi.RemoteURL); err != nil {
slog.Error("mirror: remote is not valid", "repo", name, "err", err)
return err
}
if w.isRemoteGithub(mi.RemoteURL) && w.c.Mirror.GithubToken != "" {
if err := repo.FetchWithAuth(mi.Remote, w.c.Mirror.GithubToken); err != nil {
slog.Error("mirror: fetch failed (authorized)", "repo", name, "err", err)
return err
}
} else {
if err := repo.Fetch(mi.Remote); err != nil {
slog.Error("mirror: fetch failed", "repo", name, "err", err)
return err
}
}
if err := repo.SetLastSync(time.Now()); err != nil {
slog.Error("mirror: failed to set last sync time", "repo", name, "err", err)
}
slog.Info("mirror: sync completed", "repo", repo.Name())
return nil
}
func (w *Worker) findMirrorRepos() ([]*git.Repo, error) {
dirs, err := os.ReadDir(w.c.Repo.Dir)
if err != nil {
return nil, err
}
var repos []*git.Repo
for _, dir := range dirs {
if !dir.IsDir() {
continue
}
name := dir.Name()
repo, err := git.Open(filepath.Join(w.c.Repo.Dir, filepath.Clean(name)), "")
if err != nil {
slog.Debug("skipping non-git directory", "path", name, "err", err)
continue
}
mirror, err := repo.MirrorInfo()
if err != nil {
slog.Debug("skipping non-mirror repo", "path", name, "err", err)
continue
}
if mirror.IsMirror {
repos = append(repos, repo)
}
}
return repos, nil
}
func (w *Worker) isRemoteValid(remote string) error {
if !strings.HasPrefix(remote, "http") {
return fmt.Errorf("only http and https remotes are supported")
}
return nil
}
func (w *Worker) isRemoteGithub(remoteURL string) bool {
return strings.Contains(remoteURL, "github.com")
}
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