Refactor kubetest2 gke deployer into different source files

kubetest2-gke/deployer/build.go

@@ -0,0 +1,36 @@
+/*
+Copyright 2020 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package deployer
+
+import (
+	"fmt"
+
+	"sigs.k8s.io/kubetest2/pkg/build"
+)
+
+func (d *deployer) Build() error {
+	if err := build.Build(); err != nil {
+		return err
+	}
+
+	if d.stageLocation != "" {
+		if err := build.Stage(d.stageLocation); err != nil {
+			return fmt.Errorf("error staging build: %v", err)
+		}
+	}
+	return nil
+}

kubetest2-gke/deployer/commandutils.go

@@ -105,3 +105,19 @@ func home(parts ...string) string {
 	p := append([]string{os.Getenv("HOME")}, parts...)
 	return filepath.Join(p...)
 }
+
+func (d *deployer) getClusterCredentials(project, cluster string) error {
+	// Get gcloud to create the file.
+	loc, err := d.location()
+	if err != nil {
+		return err
+	}
+
+	if err := runWithOutput(exec.Command("gcloud",
+		d.containerArgs("clusters", "get-credentials", cluster, "--project="+project, loc)...),
+	); err != nil {
+		return fmt.Errorf("error executing get-credentials: %v", err)
+	}
+
+	return nil
+}

kubetest2-gke/deployer/common.go

@@ -18,13 +18,15 @@ package deployer
 
 import (
 	"fmt"
+	realexec "os/exec"
 	"strconv"
 	"strings"
 	"time"
 
 	"k8s.io/klog"
 
 	"sigs.k8s.io/kubetest2/pkg/boskos"
+	"sigs.k8s.io/kubetest2/pkg/exec"
 )
 
 const (
@@ -110,3 +112,26 @@ func buildProjectClustersLayout(projects, clusters []string, projectClustersLayo
 	}
 	return nil
 }
+
+func (d *deployer) containerArgs(args ...string) []string {
+	return append(append([]string{}, "container"), args...)
+}
+
+func runWithNoOutput(cmd exec.Cmd) error {
+	exec.NoOutput(cmd)
+	return cmd.Run()
+}
+
+func runWithOutput(cmd exec.Cmd) error {
+	exec.InheritOutput(cmd)
+	return cmd.Run()
+}
+
+// execError returns a string format of err including stderr if the
+// err is an ExitError, useful for errors from e.g. exec.Cmd.Output().
+func execError(err error) string {
+	if ee, ok := err.(*realexec.ExitError); ok {
+		return fmt.Sprintf("%v (output: %q)", err, string(ee.Stderr))
+	}
+	return err.Error()
+}