first working version

cmd/server/core/git/git.go

@@ -1,6 +1,7 @@
 package git
 
 import (
+	"errors"
 	"fmt"
 
 	"github.com/go-git/go-git/v6"
@@ -12,9 +13,10 @@ import (
 
 type (
 	Repository struct {
-		src  string
-		dst  string
-		auth Authentication
+		src     string
+		dst     string
+		srcAuth Authentication
+		dstAuth Authentication
 	}
 
 	Authentication interface {
@@ -22,16 +24,42 @@ type (
 	}
 
 	TokenAuthentication struct {
-		username string
-		token    string
+		token string
+	}
+
+	BasicAuthentication struct {
+		username, password string
 	}
 
 	NoAuthentication struct{}
 )
 
+func NewRepository(src, dst string, srcAuth, dstAuth Authentication) Repository {
+	return Repository{
+		src:     src,
+		dst:     dst,
+		srcAuth: srcAuth,
+		dstAuth: dstAuth,
+	}
+}
+
+func NewTokenAuthentication(token string) TokenAuthentication {
+	return TokenAuthentication{
+		token: token,
+	}
+}
+
+func NewBasicAuthentication(username, password string) BasicAuthentication {
+	return BasicAuthentication{
+		username: username,
+		password: password,
+	}
+}
+
 func Sync(r Repository) error {
 	repo, err := git.Clone(memory.NewStorage(), nil, &git.CloneOptions{
-		URL: r.src,
+		URL:  r.src,
+		Auth: r.srcAuth.Value(),
 	})
 	if err != nil {
 		return fmt.Errorf("failed to clone repository from source: %w", err)
@@ -50,11 +78,14 @@ func Sync(r Repository) error {
 
 	err = m.Push(&git.PushOptions{
 		RemoteName: "mirror",
-		Auth:       r.auth.Value(),
+		Auth:       r.dstAuth.Value(),
 		RefSpecs:   []config.RefSpec{"+refs/*:refs/*"},
 		Force:      true,
 	})
 	if err != nil {
+		if errors.Is(err, git.NoErrAlreadyUpToDate) {
+			return nil
+		}
 		return fmt.Errorf("failed to push to mirror server: %w", err)
 	}
 
@@ -63,11 +94,18 @@ func Sync(r Repository) error {
 
 func (a TokenAuthentication) Value() transport.AuthMethod {
 	return &http.BasicAuth{
-		Username: a.username,
+		Username: "git",
 		Password: a.token,
 	}
 }
 
+func (a BasicAuthentication) Value() transport.AuthMethod {
+	return &http.BasicAuth{
+		Username: a.username,
+		Password: a.password,
+	}
+}
+
 func (NoAuthentication) Value() transport.AuthMethod {
 	return nil
 }