Implement "kubedb create"

docs/kubedb/README.md

@@ -0,0 +1,20 @@
+# kubedb
+
+```bash
+$  kubedb --help
+
+kubedb controls k8sdb ThirdPartyResource objects.
+
+Find more information at https://github.com/k8sdb/kubedb.
+
+Basic Commands (Beginner):
+  create      Create a resource by filename or stdin
+
+Basic Commands (Intermediate):
+  get         Display one or many resources
+
+Other Commands:
+  help        Help about any command
+
+Use "kubedb <command> --help" for more information about a given command.
+```

docs/kubedb/create.md

@@ -0,0 +1,51 @@
+# kubedb create
+
+## Example
+
+##### Help for create command
+
+```bash
+$ kubedb create --help
+
+Create a resource by filename or stdin.
+
+JSON and YAML formats are accepted.
+
+Examples:
+  # Create a elastic using the data in elastic.json.
+  kubedb create -f ./elastic.json
+
+  # Create a elastic based on the JSON passed into stdin.
+  cat elastic.json | kubedb create -f -
+
+Options:
+  -f, --filename=[]: Filename to use to create the resource
+  -R, --recursive=false: Process the directory used in -f, --filename recursively.
+
+Usage:
+  kubedb create [options]
+
+Use "kubedb create options" for a list of global command-line options (applies to all commands).
+```
+
+##### Create from file
+```bash
+$ kubedb create -f ./elastic.json
+
+elastic "elasticsearch-demo" created
+```
+
+##### Create from stdin
+```bash
+$ cat ./elastic.json | kubedb create -f -
+
+elastic "elasticsearch-demo" created
+```
+
+##### Create from folder
+```bash
+$ kubedb create -f resources -R
+
+es "elasticsearch-demo" created
+pg "postgres-demo" created
+```

docs/kubedb/get.md

@@ -2,24 +2,6 @@
 
 ## Example
 
-##### Get help
-```bash
-$ kubedb --help
-
-kubedb controls k8sdb ThirdPartyResource objects.
-
-Find more information at https://github.com/k8sdb/kubedb.
-
-Basic Commands (Intermediate):
-  get         Display one or many resources
-
-Other Commands:
-  help        Help about any command
-
-Use "kubedb <command> --help" for more information about a given command.
-```
-
-
 ##### Help for get command
 
 ```bash

pkg/cmd/cmd.go

@@ -21,6 +21,12 @@ func NewKubedbCommand(in io.Reader, out, err io.Writer) *cobra.Command {
 	}
 
 	groups := templates.CommandGroups{
+		{
+			Message: "Basic Commands (Beginner):",
+			Commands: []*cobra.Command{
+				NewCmdCreate(out, err),
+			},
+		},
 		{
 			Message: "Basic Commands (Intermediate):",
 			Commands: []*cobra.Command{

pkg/cmd/create.go

@@ -0,0 +1,134 @@
+package cmd
+
+import (
+	"errors"
+	"io"
+
+	"github.com/k8sdb/kubedb/pkg/cmd/util"
+	"github.com/k8sdb/kubedb/pkg/kube"
+	"github.com/spf13/cobra"
+	"k8s.io/kubernetes/pkg/kubectl/cmd/templates"
+	cmdutil "k8s.io/kubernetes/pkg/kubectl/cmd/util"
+	"k8s.io/kubernetes/pkg/kubectl/resource"
+	"k8s.io/kubernetes/pkg/runtime"
+)
+
+// ref: k8s.io/kubernetes/pkg/kubectl/cmd/create.go
+
+var (
+	create_long = templates.LongDesc(`
+		Create a resource by filename or stdin.
+
+		JSON and YAML formats are accepted.`)
+
+	create_example = templates.Examples(`
+		# Create a elastic using the data in elastic.json.
+		kubedb create -f ./elastic.json
+
+		# Create a elastic based on the JSON passed into stdin.
+		cat elastic.json | kubedb create -f -`)
+)
+
+func NewCmdCreate(out io.Writer, errOut io.Writer) *cobra.Command {
+	options := &resource.FilenameOptions{}
+
+	cmd := &cobra.Command{
+		Use:     "create",
+		Short:   "Create a resource by filename or stdin",
+		Long:    create_long,
+		Example: create_example,
+		Run: func(cmd *cobra.Command, args []string) {
+			if cmdutil.IsFilenameEmpty(options.Filenames) {
+				defaultRunFunc := cmdutil.DefaultSubCommandRun(errOut)
+				defaultRunFunc(cmd, args)
+				return
+			}
+			f := kube.NewKubeFactory(cmd)
+			cmdutil.CheckErr(RunCreate(f, out, options))
+		},
+	}
+
+	util.AddCreateFlags(cmd, options)
+	return cmd
+}
+
+func RunCreate(f cmdutil.Factory, out io.Writer, options *resource.FilenameOptions) error {
+	cmdNamespace, enforceNamespace, err := f.DefaultNamespace()
+	if err != nil {
+		return err
+	}
+
+	mapper, typer, err := f.UnstructuredObject()
+	if err != nil {
+		return err
+	}
+
+	r := resource.NewBuilder(
+		mapper,
+		typer,
+		resource.ClientMapperFunc(f.UnstructuredClientForMapping),
+		runtime.UnstructuredJSONScheme).
+		Schema(util.Validator()).
+		ContinueOnError().
+		NamespaceParam(cmdNamespace).DefaultNamespace().
+		FilenameParam(enforceNamespace, options).
+		Flatten().
+		Do()
+
+	err = r.Err()
+	if err != nil {
+		return err
+	}
+
+	infoList := make([]*resource.Info, 0)
+	err = r.Visit(func(info *resource.Info, err error) error {
+		if err != nil {
+			return err
+		}
+
+		kind := info.GetObjectKind().GroupVersionKind().Kind
+		if err := util.CheckSupportedResource(kind); err != nil {
+			return err
+		}
+
+		infoList = append(infoList, info)
+		return nil
+	})
+	if err != nil {
+		return err
+	}
+
+	showAlias := false
+	if len(infoList) > 1 {
+		showAlias = true
+	}
+
+	count := 0
+	for _, info := range infoList {
+		if err := createAndRefresh(info); err != nil {
+			return cmdutil.AddSourceToErr("creating", info.Source, err)
+		}
+		count++
+		resourceName := info.Mapping.Resource
+		if showAlias {
+			if alias, ok := util.ResourceShortFormFor(info.Mapping.Resource); ok {
+				resourceName = alias
+			}
+		}
+		cmdutil.PrintSuccess(mapper, false, out, resourceName, info.Name, false, "created")
+	}
+
+	if count == 0 {
+		return errors.New("no objects passed to create")
+	}
+	return nil
+}
+
+func createAndRefresh(info *resource.Info) error {
+	obj, err := resource.NewHelper(info.Client, info.Mapping).Create(info.Namespace, true, info.Object)
+	if err != nil {
+		return err
+	}
+	info.Refresh(obj, true)
+	return nil
+}

pkg/cmd/util/flags.go

@@ -1,6 +1,9 @@
 package util
 
-import "github.com/spf13/cobra"
+import (
+	"github.com/spf13/cobra"
+	"k8s.io/kubernetes/pkg/kubectl/resource"
+)
 
 func AddGetFlags(cmd *cobra.Command) {
 	cmd.Flags().Bool("all-namespaces", false, "If present, list the requested object(s) across all namespaces. Namespace in current context is ignored even if specified with --namespace.")
@@ -10,3 +13,8 @@ func AddGetFlags(cmd *cobra.Command) {
 	cmd.Flags().BoolP("show-all", "a", false, "When printing, show all resources (default hide terminated pods.)")
 	cmd.Flags().Bool("show-labels", false, "When printing, show all labels as the last column (default hide labels column)")
 }
+
+func AddCreateFlags(cmd *cobra.Command, options *resource.FilenameOptions) {
+	cmd.Flags().StringSliceVarP(&options.Filenames, "filename", "f", options.Filenames, "Filename to use to create the resource")
+	cmd.Flags().BoolVarP(&options.Recursive, "recursive", "R", options.Recursive, "Process the directory used in -f, --filename recursively.")
+}

pkg/cmd/util/resource.go

@@ -40,6 +40,19 @@ func GetSupportedResourceKind(resource string) (string, error) {
 	return resource, nil
 }
 
+func CheckSupportedResource(kind string) error {
+	switch kind {
+	case tapi.ResourceKindElastic:
+	case tapi.ResourceKindPostgres:
+	case tapi.ResourceKindDatabaseSnapshot:
+	case tapi.ResourceKindDeletedDatabase:
+		return nil
+	default:
+		return fmt.Errorf(`kubedb doesn't support a resource type "%v"`, kind)
+	}
+	return nil
+}
+
 func GetAllSupportedResources(f cmdutil.Factory) ([]string, error) {
 
 	resources := map[string]string{

pkg/cmd/util/schema.go

@@ -0,0 +1,17 @@
+package util
+
+import (
+	"k8s.io/kubernetes/pkg/api/validation"
+)
+
+type ConjunctiveSchema []validation.Schema
+
+func (c *ConjunctiveSchema) ValidateBytes(data []byte) error {
+	return nil
+}
+
+func Validator() validation.Schema {
+	return validation.ConjunctiveSchema{
+		validation.NoDoubleKeySchema{},
+	}
+}