Add script to generate CLI Structure

This commit adds a script to generate the CLI structure.
Also, adds the structure to README.md

Makefile

@@ -46,3 +46,7 @@ test-coverage:
 .PHONY: cross
 cross:
 	gox -osarch="darwin/amd64 linux/amd64 linux/arm windows/amd64" -output="bin/{{.OS}}-{{.Arch}}/ocdev" $(BUILD_FLAGS)
+
+.PHONY: generate-cli-docs
+generate-cli-docs:
+	go run scripts/generate-cli-documentation.go

README.md

@@ -11,3 +11,25 @@ You can [download](https://dl.bintray.com/ocdev/ocdev/latest/) latest binaries (
 - make sure that ocdev binary exists in your $PATH
 - copy the [plugin.yaml](./plugin.yaml) file to ~/.kube/plugins/ocdev/
 - use the plugin as `oc plugin dev`
+
+### CLI Structure
+```
+ocdev --verbose : OpenShift CLI for Developers
+    application : application
+        create : create an application
+        delete : delete the given application
+        get --short : get the active application
+        list : lists all the applications
+    completion : Output shell completion code
+    component : components of application
+        create --binary --dir --git : component create <component_type> [component_name]
+        delete : component delete <component_name>
+        get --short : component get
+        push --dir : component push
+    storage --component : storage
+        add --path --size : create storage and mount to component
+        list : list storage attached to a component
+        remove : remove storage from component
+    version : Print the version of ocdev
+```
+*_autogenerated_

cmd/documentation.go

@@ -0,0 +1,47 @@
+package cmd
+
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+	"github.com/spf13/pflag"
+)
+
+func getFlags(flags *pflag.FlagSet) []string {
+	var f []string
+	flags.VisitAll(func(flag *pflag.Flag) {
+		f = append(f, fmt.Sprintf("--%v", flag.Name))
+	})
+	return f
+}
+
+func flattenFlags(flags []string) string {
+	var flagString string
+	for _, flag := range flags {
+		flagString = flagString + flag + " "
+	}
+	return flagString
+}
+
+func commandPrinter(command *cobra.Command, level int) string {
+	var finalCommand string
+	// add indentation
+	for i := 0; i < level; i++ {
+		finalCommand = finalCommand + "    "
+	}
+	finalCommand = finalCommand +
+		command.Name() +
+		" " +
+		flattenFlags(getFlags(command.NonInheritedFlags())) +
+		": " +
+		command.Short +
+		"\n"
+	for _, subcommand := range command.Commands() {
+		finalCommand = finalCommand + commandPrinter(subcommand, level+1)
+	}
+	return finalCommand
+}
+
+func GenerateCLIDocs() string {
+	return commandPrinter(rootCmd, 0)
+}

scripts/generate-cli-documentation.go

@@ -0,0 +1,11 @@
+package main
+
+import (
+	"fmt"
+
+	"github.com/redhat-developer/ocdev/cmd"
+)
+
+func main() {
+	fmt.Print(cmd.GenerateCLIDocs())
+}