vendor: update all dependencies to latest versions

vendor/github.com/Azure/go-autorest/autorest/utils/auth.go

@@ -0,0 +1,42 @@
+package utils
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/Azure/go-autorest/autorest"
+	"github.com/Azure/go-autorest/autorest/adal"
+	"github.com/Azure/go-autorest/autorest/azure"
+)
+
+// GetAuthorizer gets an Azure Service Principal authorizer.
+// This func assumes "AZURE_TENANT_ID", "AZURE_CLIENT_ID",
+// "AZURE_CLIENT_SECRET" are set as environment variables.
+func GetAuthorizer(env azure.Environment) (*autorest.BearerAuthorizer, error) {
+	tenantID := GetEnvVarOrExit("AZURE_TENANT_ID")
+
+	oauthConfig, err := adal.NewOAuthConfig(env.ActiveDirectoryEndpoint, tenantID)
+	if err != nil {
+		return nil, err
+	}
+
+	clientID := GetEnvVarOrExit("AZURE_CLIENT_ID")
+	clientSecret := GetEnvVarOrExit("AZURE_CLIENT_SECRET")
+
+	spToken, err := adal.NewServicePrincipalToken(*oauthConfig, clientID, clientSecret, env.ResourceManagerEndpoint)
+	if err != nil {
+		return nil, err
+	}
+
+	return autorest.NewBearerAuthorizer(spToken), nil
+}
+
+// GetEnvVarOrExit returns the value of specified environment variable or terminates if it's not defined.
+func GetEnvVarOrExit(varName string) string {
+	value := os.Getenv(varName)
+	if value == "" {
+		fmt.Printf("Missing environment variable %s\n", varName)
+		os.Exit(1)
+	}
+	return value
+}

vendor/github.com/Azure/go-autorest/autorest/utils/commit.go

@@ -0,0 +1,18 @@
+package utils
+
+import (
+	"bytes"
+	"os/exec"
+)
+
+// GetCommit returns git HEAD (short)
+func GetCommit() string {
+	cmd := exec.Command("git", "rev-parse", "HEAD")
+	var out bytes.Buffer
+	cmd.Stdout = &out
+	err := cmd.Run()
+	if err != nil {
+		return ""
+	}
+	return string(out.Bytes()[:7])
+}