Move to vendor

Signed-off-by: Olivier Gambier <olivier@docker.com>

vendor/github.com/aws/aws-sdk-go/aws/session/session.go

@@ -0,0 +1,120 @@
+// Package session provides a way to create service clients with shared configuration
+// and handlers.
+//
+// Generally this package should be used instead of the `defaults` package.
+//
+// A session should be used to share configurations and request handlers between multiple
+// service clients. When service clients need specific configuration aws.Config can be
+// used to provide additional configuration directly to the service client.
+package session
+
+import (
+	"github.com/aws/aws-sdk-go/aws"
+	"github.com/aws/aws-sdk-go/aws/client"
+	"github.com/aws/aws-sdk-go/aws/corehandlers"
+	"github.com/aws/aws-sdk-go/aws/defaults"
+	"github.com/aws/aws-sdk-go/aws/request"
+	"github.com/aws/aws-sdk-go/private/endpoints"
+)
+
+// A Session provides a central location to create service clients from and
+// store configurations and request handlers for those services.
+//
+// Sessions are safe to create service clients concurrently, but it is not safe
+// to mutate the session concurrently.
+type Session struct {
+	Config   *aws.Config
+	Handlers request.Handlers
+}
+
+// New creates a new instance of the handlers merging in the provided Configs
+// on top of the SDK's default configurations. Once the session is created it
+// can be mutated to modify Configs or Handlers. The session is safe to be read
+// concurrently, but it should not be written to concurrently.
+//
+// Example:
+//     // Create a session with the default config and request handlers.
+//     sess := session.New()
+//
+//     // Create a session with a custom region
+//     sess := session.New(&aws.Config{Region: aws.String("us-east-1")})
+//
+//     // Create a session, and add additional handlers for all service
+//     // clients created with the session to inherit. Adds logging handler.
+//     sess := session.New()
+//     sess.Handlers.Send.PushFront(func(r *request.Request) {
+//          // Log every request made and its payload
+//          logger.Println("Request: %s/%s, Payload: %s", r.ClientInfo.ServiceName, r.Operation, r.Params)
+//     })
+//
+//     // Create a S3 client instance from a session
+//     sess := session.New()
+//     svc := s3.New(sess)
+func New(cfgs ...*aws.Config) *Session {
+	cfg := defaults.Config()
+	handlers := defaults.Handlers()
+
+	// Apply the passed in configs so the configuration can be applied to the
+	// default credential chain
+	cfg.MergeIn(cfgs...)
+	cfg.Credentials = defaults.CredChain(cfg, handlers)
+
+	// Reapply any passed in configs to override credentials if set
+	cfg.MergeIn(cfgs...)
+
+	s := &Session{
+		Config:   cfg,
+		Handlers: handlers,
+	}
+
+	initHandlers(s)
+
+	return s
+}
+
+func initHandlers(s *Session) {
+	// Add the Validate parameter handler if it is not disabled.
+	s.Handlers.Validate.Remove(corehandlers.ValidateParametersHandler)
+	if !aws.BoolValue(s.Config.DisableParamValidation) {
+		s.Handlers.Validate.PushBackNamed(corehandlers.ValidateParametersHandler)
+	}
+}
+
+// Copy creates and returns a copy of the current session, coping the config
+// and handlers. If any additional configs are provided they will be merged
+// on top of the session's copied config.
+//
+// Example:
+//     // Create a copy of the current session, configured for the us-west-2 region.
+//     sess.Copy(&aws.Config{Region: aws.String("us-west-2"})
+func (s *Session) Copy(cfgs ...*aws.Config) *Session {
+	newSession := &Session{
+		Config:   s.Config.Copy(cfgs...),
+		Handlers: s.Handlers.Copy(),
+	}
+
+	initHandlers(newSession)
+
+	return newSession
+}
+
+// ClientConfig satisfies the client.ConfigProvider interface and is used to
+// configure the service client instances. Passing the Session to the service
+// client's constructor (New) will use this method to configure the client.
+//
+// Example:
+//     sess := session.New()
+//     s3.New(sess)
+func (s *Session) ClientConfig(serviceName string, cfgs ...*aws.Config) client.Config {
+	s = s.Copy(cfgs...)
+	endpoint, signingRegion := endpoints.NormalizeEndpoint(
+		aws.StringValue(s.Config.Endpoint), serviceName,
+		aws.StringValue(s.Config.Region), aws.BoolValue(s.Config.DisableSSL))
+
+	return client.Config{
+		Config:        s.Config,
+		Handlers:      s.Handlers,
+		Endpoint:      endpoint,
+		SigningRegion: signingRegion,
+	}
+}