s3 cache client-side support

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>

vendor/github.com/aws/aws-sdk-go-v2/credentials/static_provider.go

@@ -0,0 +1,53 @@
+package credentials
+
+import (
+	"context"
+
+	"github.com/aws/aws-sdk-go-v2/aws"
+)
+
+const (
+	// StaticCredentialsName provides a name of Static provider
+	StaticCredentialsName = "StaticCredentials"
+)
+
+// StaticCredentialsEmptyError is emitted when static credentials are empty.
+type StaticCredentialsEmptyError struct{}
+
+func (*StaticCredentialsEmptyError) Error() string {
+	return "static credentials are empty"
+}
+
+// A StaticCredentialsProvider is a set of credentials which are set, and will
+// never expire.
+type StaticCredentialsProvider struct {
+	Value aws.Credentials
+}
+
+// NewStaticCredentialsProvider return a StaticCredentialsProvider initialized with the AWS
+// credentials passed in.
+func NewStaticCredentialsProvider(key, secret, session string) StaticCredentialsProvider {
+	return StaticCredentialsProvider{
+		Value: aws.Credentials{
+			AccessKeyID:     key,
+			SecretAccessKey: secret,
+			SessionToken:    session,
+		},
+	}
+}
+
+// Retrieve returns the credentials or error if the credentials are invalid.
+func (s StaticCredentialsProvider) Retrieve(_ context.Context) (aws.Credentials, error) {
+	v := s.Value
+	if v.AccessKeyID == "" || v.SecretAccessKey == "" {
+		return aws.Credentials{
+			Source: StaticCredentialsName,
+		}, &StaticCredentialsEmptyError{}
+	}
+
+	if len(v.Source) == 0 {
+		v.Source = StaticCredentialsName
+	}
+
+	return v, nil
+}