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backend: Hardcode backend scheme in Factory

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Our ParseConfig implementations always expect a specific scheme, thus no
other scheme would work.
This commit is contained in:
Michael Eischer 2023-06-08 17:32:43 +02:00
parent 705ad51bcc
commit 50e0d5e6b5
14 changed files with 43 additions and 29 deletions
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18
cmd/restic/global.go
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@ -100,15 +100,15 @@ var internalGlobalCtx context.Context
func init() {
backends := location.NewRegistry()
backends.Register("b2", b2.NewFactory())
backends.Register("local", local.NewFactory())
backends.Register("sftp", sftp.NewFactory())
backends.Register("s3", s3.NewFactory())
backends.Register("gs", gs.NewFactory())
backends.Register("azure", azure.NewFactory())
backends.Register("swift", swift.NewFactory())
backends.Register("rest", rest.NewFactory())
backends.Register("rclone", rclone.NewFactory())
backends.Register(azure.NewFactory())
backends.Register(b2.NewFactory())
backends.Register(gs.NewFactory())
backends.Register(local.NewFactory())
backends.Register(rclone.NewFactory())
backends.Register(rest.NewFactory())
backends.Register(s3.NewFactory())
backends.Register(sftp.NewFactory())
backends.Register(swift.NewFactory())
globalOptions.backends = backends
var cancel context.CancelFunc

2
internal/backend/azure/azure.go
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@ -45,7 +45,7 @@ const defaultListMaxItems = 5000
var _ restic.Backend = &Backend{}
func NewFactory() location.Factory {
return location.NewHTTPBackendFactory(ParseConfig, location.NoPassword, Create, Open)
return location.NewHTTPBackendFactory("azure", ParseConfig, location.NoPassword, Create, Open)
}
func open(cfg Config, rt http.RoundTripper) (*Backend, error) {

2
internal/backend/b2/b2.go
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@ -38,7 +38,7 @@ const defaultListMaxItems = 10 * 1000
var _ restic.Backend = &b2Backend{}
func NewFactory() location.Factory {
return location.NewHTTPBackendFactory(ParseConfig, location.NoPassword, Create, Open)
return location.NewHTTPBackendFactory("b2", ParseConfig, location.NoPassword, Create, Open)
}
type sniffingRoundTripper struct {

2
internal/backend/gs/gs.go
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@ -49,7 +49,7 @@ type Backend struct {
var _ restic.Backend = &Backend{}
func NewFactory() location.Factory {
return location.NewHTTPBackendFactory(ParseConfig, location.NoPassword, Create, Open)
return location.NewHTTPBackendFactory("gs", ParseConfig, location.NoPassword, Create, Open)
}
func getStorageClient(rt http.RoundTripper) (*storage.Client, error) {

2
internal/backend/local/local.go
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@ -31,7 +31,7 @@ type Local struct {
var _ restic.Backend = &Local{}
func NewFactory() location.Factory {
return location.NewLimitedBackendFactory(ParseConfig, location.NoPassword, limiter.WrapBackendConstructor(Create), limiter.WrapBackendConstructor(Open))
return location.NewLimitedBackendFactory("local", ParseConfig, location.NoPassword, limiter.WrapBackendConstructor(Create), limiter.WrapBackendConstructor(Open))
}
const defaultLayout = "default"

4
internal/backend/location/display_location_test.go
View File

@ -10,8 +10,8 @@ import (
func TestStripPassword(t *testing.T) {
registry := location.NewRegistry()
registry.Register("test",
location.NewHTTPBackendFactory[any, restic.Backend](nil,
registry.Register(
location.NewHTTPBackendFactory[any, restic.Backend]("test", nil,
func(s string) string {
return "cleaned"
}, nil, nil,

9
internal/backend/location/location_test.go
View File

@ -14,6 +14,7 @@ type testConfig struct {
func testFactory() location.Factory {
return location.NewHTTPBackendFactory[testConfig, restic.Backend](
"local",
func(s string) (*testConfig, error) {
return &testConfig{loc: s}, nil
}, nil, nil, nil,
@ -22,12 +23,12 @@ func testFactory() location.Factory {
func TestParse(t *testing.T) {
registry := location.NewRegistry()
registry.Register("test", testFactory())
registry.Register(testFactory())
path := "test:example"
path := "local:example"
u, err := location.Parse(registry, path)
test.OK(t, err)
test.Equals(t, "test", u.Scheme)
test.Equals(t, "local", u.Scheme)
test.Equals(t, &testConfig{loc: path}, u.Config)
}
@ -43,7 +44,7 @@ func TestParseFallback(t *testing.T) {
}
registry := location.NewRegistry()
registry.Register("local", testFactory())
registry.Register(testFactory())
for _, path := range fallbackTests {
t.Run(path, func(t *testing.T) {

22
internal/backend/location/registry.go
View File

@ -18,11 +18,11 @@ func NewRegistry() *Registry {
}
}
func (r *Registry) Register(scheme string, factory Factory) {
if r.factories[scheme] != nil {
func (r *Registry) Register(factory Factory) {
if r.factories[factory.Scheme()] != nil {
panic("duplicate backend")
}
r.factories[scheme] = factory
r.factories[factory.Scheme()] = factory
}
func (r *Registry) Lookup(scheme string) Factory {
@ -30,6 +30,7 @@ func (r *Registry) Lookup(scheme string) Factory {
}
type Factory interface {
Scheme() string
ParseConfig(s string) (interface{}, error)
StripPassword(s string) string
Create(ctx context.Context, cfg interface{}, rt http.RoundTripper, lim limiter.Limiter) (restic.Backend, error)
@ -37,12 +38,17 @@ type Factory interface {
}
type genericBackendFactory[C any, T restic.Backend] struct {
scheme string
parseConfigFn func(s string) (*C, error)
stripPasswordFn func(s string) string
createFn func(ctx context.Context, cfg C, rt http.RoundTripper, lim limiter.Limiter) (T, error)
openFn func(ctx context.Context, cfg C, rt http.RoundTripper, lim limiter.Limiter) (T, error)
}
func (f *genericBackendFactory[C, T]) Scheme() string {
return f.scheme
}
func (f *genericBackendFactory[C, T]) ParseConfig(s string) (interface{}, error) {
return f.parseConfigFn(s)
}
@ -59,12 +65,15 @@ func (f *genericBackendFactory[C, T]) Open(ctx context.Context, cfg interface{},
return f.openFn(ctx, *cfg.(*C), rt, lim)
}
func NewHTTPBackendFactory[C any, T restic.Backend](parseConfigFn func(s string) (*C, error),
func NewHTTPBackendFactory[C any, T restic.Backend](
scheme string,
parseConfigFn func(s string) (*C, error),
stripPasswordFn func(s string) string,
createFn func(ctx context.Context, cfg C, rt http.RoundTripper) (T, error),
openFn func(ctx context.Context, cfg C, rt http.RoundTripper) (T, error)) Factory {
return &genericBackendFactory[C, T]{
scheme: scheme,
parseConfigFn: parseConfigFn,
stripPasswordFn: stripPasswordFn,
createFn: func(ctx context.Context, cfg C, rt http.RoundTripper, _ limiter.Limiter) (T, error) {
@ -76,12 +85,15 @@ func NewHTTPBackendFactory[C any, T restic.Backend](parseConfigFn func(s string)
}
}
func NewLimitedBackendFactory[C any, T restic.Backend](parseConfigFn func(s string) (*C, error),
func NewLimitedBackendFactory[C any, T restic.Backend](
scheme string,
parseConfigFn func(s string) (*C, error),
stripPasswordFn func(s string) string,
createFn func(ctx context.Context, cfg C, lim limiter.Limiter) (T, error),
openFn func(ctx context.Context, cfg C, lim limiter.Limiter) (T, error)) Factory {
return &genericBackendFactory[C, T]{
scheme: scheme,
parseConfigFn: parseConfigFn,
stripPasswordFn: stripPasswordFn,
createFn: func(ctx context.Context, cfg C, _ http.RoundTripper, lim limiter.Limiter) (T, error) {

1
internal/backend/mem/mem_backend.go
View File

@ -27,6 +27,7 @@ func NewFactory() location.Factory {
be := New()
return location.NewHTTPBackendFactory[struct{}, *MemoryBackend](
"mem",
func(s string) (*struct{}, error) {
return &struct{}{}, nil
},

2
internal/backend/rclone/backend.go
View File

@ -38,7 +38,7 @@ type Backend struct {
}
func NewFactory() location.Factory {
return location.NewLimitedBackendFactory(ParseConfig, location.NoPassword, Create, Open)
return location.NewLimitedBackendFactory("rclone", ParseConfig, location.NoPassword, Create, Open)
}
// run starts command with args and initializes the StdioConn.

2
internal/backend/rest/rest.go
View File

@ -31,7 +31,7 @@ type Backend struct {
}
func NewFactory() location.Factory {
return location.NewHTTPBackendFactory(ParseConfig, StripPassword, Create, Open)
return location.NewHTTPBackendFactory("rest", ParseConfig, StripPassword, Create, Open)
}
// the REST API protocol version is decided by HTTP request headers, these are the constants.

2
internal/backend/s3/s3.go
View File

@ -33,7 +33,7 @@ type Backend struct {
var _ restic.Backend = &Backend{}
func NewFactory() location.Factory {
return location.NewHTTPBackendFactory(ParseConfig, location.NoPassword, Create, Open)
return location.NewHTTPBackendFactory("s3", ParseConfig, location.NoPassword, Create, Open)
}
const defaultLayout = "default"

2
internal/backend/sftp/sftp.go
View File

@ -44,7 +44,7 @@ type SFTP struct {
var _ restic.Backend = &SFTP{}
func NewFactory() location.Factory {
return location.NewLimitedBackendFactory(ParseConfig, location.NoPassword, limiter.WrapBackendConstructor(Create), limiter.WrapBackendConstructor(Open))
return location.NewLimitedBackendFactory("sftp", ParseConfig, location.NoPassword, limiter.WrapBackendConstructor(Create), limiter.WrapBackendConstructor(Open))
}
const defaultLayout = "default"

2
internal/backend/swift/swift.go
View File

@ -36,7 +36,7 @@ type beSwift struct {
var _ restic.Backend = &beSwift{}
func NewFactory() location.Factory {
return location.NewHTTPBackendFactory(ParseConfig, location.NoPassword, Open, Open)
return location.NewHTTPBackendFactory("swift", ParseConfig, location.NoPassword, Open, Open)
}
// Open opens the swift backend at a container in region. The container is