commands/inspect: Add

Author: rajivr

commands/inspect.go

@@ -0,0 +1,72 @@
+package commands
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+	"text/template"
+
+	"github.com/docker/machine/libmachine"
+)
+
+var funcMap = template.FuncMap{
+	"json": func(v interface{}) string {
+		a, _ := json.Marshal(v)
+		return string(a)
+	},
+	"prettyjson": func(v interface{}) string {
+		a, _ := json.MarshalIndent(v, "", "    ")
+		return string(a)
+	},
+}
+
+func cmdInspect(c CommandLine, api libmachine.API) error {
+	if len(c.Args()) > 1 {
+		c.ShowHelp()
+		return ErrExpectedOneMachine
+	}
+
+	target, err := targetHost(c, api)
+	if err != nil {
+		return err
+	}
+
+	host, err := api.Load(target)
+	if err != nil {
+		return err
+	}
+
+	tmplString := c.String("format")
+	if tmplString != "" {
+		var tmpl *template.Template
+		var err error
+		if tmpl, err = template.New("").Funcs(funcMap).Parse(tmplString); err != nil {
+			return fmt.Errorf("template parsing error: %v", err)
+		}
+
+		jsonHost, err := json.Marshal(host)
+		if err != nil {
+			return err
+		}
+
+		obj := make(map[string]interface{})
+		if err := json.Unmarshal(jsonHost, &obj); err != nil {
+			return err
+		}
+
+		if err := tmpl.Execute(os.Stdout, obj); err != nil {
+			return err
+		}
+
+		os.Stdout.Write([]byte{'\n'})
+	} else {
+		prettyJSON, err := json.MarshalIndent(host, "", "    ")
+		if err != nil {
+			return err
+		}
+
+		fmt.Println(string(prettyJSON))
+	}
+
+	return nil
+}

commands/inspect_test.go

@@ -0,0 +1,31 @@
+package commands
+
+import (
+	"testing"
+
+	"github.com/docker/machine/commands/commandstest"
+	"github.com/docker/machine/libmachine"
+	"github.com/docker/machine/libmachine/libmachinetest"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestCmdInspect(t *testing.T) {
+	testCases := []struct {
+		commandLine CommandLine
+		api         libmachine.API
+		expectedErr error
+	}{
+		{
+			commandLine: &commandstest.FakeCommandLine{
+				CliArgs: []string{"foo", "bar"},
+			},
+			api:         &libmachinetest.FakeAPI{},
+			expectedErr: ErrExpectedOneMachine,
+		},
+	}
+
+	for _, tc := range testCases {
+		err := cmdInspect(tc.commandLine, tc.api)
+		assert.Equal(t, tc.expectedErr, err)
+	}
+}