feat: add plugin shell content (#5)

cmd/vela-kubernetes/command.go

@@ -0,0 +1,32 @@
+// Copyright (c) 2020 Target Brands, Inc. All rights reserved.
+//
+// Use of this source code is governed by the LICENSE file in this repository.
+
+package main
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	"strings"
+
+	"github.com/sirupsen/logrus"
+)
+
+const kubectlBin = "/bin/kubectl"
+
+// execCmd is a helper function to
+// run the provided command.
+func execCmd(e *exec.Cmd) error {
+	logrus.Tracef("executing cmd %s", strings.Join(e.Args, " "))
+
+	// set command stdout to OS stdout
+	e.Stdout = os.Stdout
+	// set command stderr to OS stderr
+	e.Stderr = os.Stderr
+
+	// output "trace" string for command
+	fmt.Println("$", strings.Join(e.Args, " "))
+
+	return e.Run()
+}

cmd/vela-kubernetes/command_test.go

@@ -0,0 +1,20 @@
+// Copyright (c) 2020 Target Brands, Inc. All rights reserved.
+//
+// Use of this source code is governed by the LICENSE file in this repository.
+
+package main
+
+import (
+	"os/exec"
+	"testing"
+)
+
+func TestKubernetes_execCmd(t *testing.T) {
+	// setup types
+	e := exec.Command("echo", "hello")
+
+	err := execCmd(e)
+	if err != nil {
+		t.Errorf("execCmd returned err: %v", err)
+	}
+}

cmd/vela-kubernetes/main.go

@@ -82,5 +82,15 @@ func run(c *cli.Context) error {
 		"time": time.Now(),
 	}).Info("Vela Kubernetes Plugin")
 
-	return nil
+	// create the plugin
+	p := &Plugin{}
+
+	// validate the plugin
+	err := p.Validate()
+	if err != nil {
+		return err
+	}
+
+	// execute the plugin
+	return p.Exec()
 }

cmd/vela-kubernetes/plugin.go

@@ -0,0 +1,39 @@
+// Copyright (c) 2020 Target Brands, Inc. All rights reserved.
+//
+// Use of this source code is governed by the LICENSE file in this repository.
+
+package main
+
+import (
+	"os/exec"
+
+	"github.com/sirupsen/logrus"
+)
+
+// Plugin represents the configuration loaded for the plugin.
+type Plugin struct{}
+
+// Command formats and outputs the command necessary for
+// kubectl to manage Kubernetes resources.
+func (p *Plugin) Command() *exec.Cmd {
+	logrus.Debug("creating kubectl command from plugin configuration")
+
+	// variable to store flags for command
+	var flags []string
+
+	return exec.Command(kubectlBin, flags...)
+}
+
+// Exec formats and runs the commands for managing resources in Kubernetes.
+func (p *Plugin) Exec() error {
+	logrus.Debug("running plugin with provided configuration")
+
+	return nil
+}
+
+// Validate verifies the plugin is properly configured.
+func (p *Plugin) Validate() error {
+	logrus.Debug("validating plugin configuration")
+
+	return nil
+}

cmd/vela-kubernetes/plugin_test.go

@@ -0,0 +1,47 @@
+// Copyright (c) 2020 Target Brands, Inc. All rights reserved.
+//
+// Use of this source code is governed by the LICENSE file in this repository.
+
+package main
+
+import (
+	"os/exec"
+	"reflect"
+	"testing"
+)
+
+func TestKubernetes_Plugin_Command(t *testing.T) {
+	// setup types
+	p := &Plugin{}
+
+	want := exec.Command(
+		kubectlBin,
+	)
+
+	// run test
+	got := p.Command()
+
+	if !reflect.DeepEqual(got, want) {
+		t.Errorf("Command is %v, want %v", got, want)
+	}
+}
+
+func TestKubernetes_Plugin_Exec(t *testing.T) {
+	// setup types
+	p := &Plugin{}
+
+	err := p.Exec()
+	if err != nil {
+		t.Errorf("Exec returned err: %v", err)
+	}
+}
+
+func TestKubernetes_Plugin_Validate(t *testing.T) {
+	// setup types
+	p := &Plugin{}
+
+	err := p.Validate()
+	if err != nil {
+		t.Errorf("Validate returned err: %v", err)
+	}
+}