siva: return error in repositoy commit if not transactional

siva/location.go

@@ -265,7 +265,7 @@ func (l *Location) repository(
 		return nil, err
 	}
 
-	return newRepository(id, fs, mode, l)
+	return newRepository(id, fs, mode, l.lib.transactional, l)
 }
 
 func (l *Location) getRepoFS(mode borges.Mode) (sivafs.SivaFS, error) {

siva/location_test.go

@@ -42,7 +42,12 @@ func (s *locationSuite) TestCreate() {
 	require.NoError(err)
 	require.NotNil(r)
 	err = r.Commit()
-	require.NoError(err)
+	if s.transactional {
+		require.NoError(err)
+	} else {
+		require.EqualError(err,
+			borges.ErrNonTransactional.New().Error())
+	}
 
 	iter, err := location.Repositories(borges.RWMode)
 	require.NoError(err)
@@ -91,7 +96,12 @@ func (s *locationSuite) TestInitExists() {
 	r, err := location.Init("http://github.com/foo/no")
 	require.NoError(err)
 	err = r.Commit()
-	require.NoError(err)
+	if s.transactional {
+		require.NoError(err)
+	} else {
+		require.EqualError(err,
+			borges.ErrNonTransactional.New().Error())
+	}
 
 	has, err = location.Has("http://github.com/foo/bar")
 	require.NoError(err)
@@ -123,8 +133,11 @@ func (s *locationSuite) TestAddLocation() {
 	require.Equal(l.ID(), r.LocationID())
 	_, err = r.R().CreateTag("test", plumbing.ZeroHash, nil)
 	require.NoError(err)
-	err = r.Commit()
-	require.NoError(err)
+	if s.transactional {
+		require.NoError(r.Commit())
+	} else {
+		require.NoError(r.Close())
+	}
 
 	locs, err := s.lib.Locations()
 	require.NoError(err)
@@ -140,13 +153,19 @@ func (s *locationSuite) TestAddLocation() {
 
 	r, err = l.Get(repoID, borges.RWMode)
 	require.NoError(err)
-	err = r.Commit()
-	require.NoError(err)
+	if s.transactional {
+		require.NoError(r.Commit())
+	} else {
+		require.NoError(r.Close())
+	}
 
 	r, err = s.lib.Get(repoID, borges.RWMode)
 	require.NoError(err)
-	err = r.Commit()
-	require.NoError(err)
+	if s.transactional {
+		require.NoError(r.Commit())
+	} else {
+		require.NoError(r.Close())
+	}
 }
 
 func (s *locationSuite) TestHasURL() {
@@ -185,8 +204,11 @@ func (s *locationSuite) TestHasURL() {
 	err = r.Storer.SetConfig(config)
 	require.NoError(err)
 
-	err = repo.Commit()
-	require.NoError(err)
+	if s.transactional {
+		require.NoError(repo.Commit())
+	} else {
+		require.NoError(repo.Close())
+	}
 
 	found, _, _, err := s.lib.Has("github.com/src-d/invalid")
 	require.NoError(err)
@@ -255,7 +277,12 @@ func (s *locationSuite) TestRepositories() {
 		e, err := loc.Init(borges.RepositoryID(id))
 		require.NoError(err)
 		err = e.Commit()
-		require.NoError(err)
+		if s.transactional {
+			require.NoError(err)
+		} else {
+			require.EqualError(err,
+				borges.ErrNonTransactional.New().Error())
+		}
 	}
 
 	it, err := loc.Repositories(borges.ReadOnlyMode)

siva/repository.go

@@ -20,10 +20,11 @@ var ErrRepoAlreadyClosed = errors.NewKind("repository % already closed")
 // Repository is an implementation for siva files of borges.Repository
 // interface.
 type Repository struct {
-	id   borges.RepositoryID
-	repo *git.Repository
-	fs   sivafs.SivaFS
-	mode borges.Mode
+	id            borges.RepositoryID
+	repo          *git.Repository
+	fs            sivafs.SivaFS
+	mode          borges.Mode
+	transactional bool
 
 	mu     sync.Mutex
 	closed bool
@@ -38,6 +39,7 @@ func newRepository(
 	id borges.RepositoryID,
 	fs sivafs.SivaFS,
 	m borges.Mode,
+	transactional bool,
 	l *Location,
 ) (*Repository, error) {
 	var sto storage.Storer
@@ -57,11 +59,12 @@ func newRepository(
 	}
 
 	return &Repository{
-		id:       id,
-		repo:     repo,
-		fs:       fs,
-		mode:     m,
-		location: l,
+		id:            id,
+		repo:          repo,
+		fs:            fs,
+		mode:          m,
+		transactional: transactional,
+		location:      l,
 	}, nil
 }
 
@@ -82,6 +85,10 @@ func (r *Repository) Mode() borges.Mode {
 
 // Commit implements borges.Repository interface.
 func (r *Repository) Commit() error {
+	if !r.transactional {
+		return borges.ErrNonTransactional.New()
+	}
+
 	if r.mode != borges.RWMode {
 		return nil
 	}