pkg/cli: use --plugins to determine which plugin.Base's kubebuilder

should run for a subcommand. This option is global. Refactoring of
getBaseFlags -> parseBaseFlags allows multiple global flags to be
parsed for a cli struct. plugin filtering considers short names,
ex. --plugins="go" rather than --plugins="go.kubebuilder.io/v2.0.0".
WithDefaultPlugins sets the default plugins a CLi should use in case
--plugins or the config 'layout' are not set

pkg/model/config: Config support the 'layout' key which indicates the
plugin that scaffolded a project, by plugin key

pkg/plugin: SplitKey, KeyFor, Key, GetShortName are utility functions
for plugin keys

* pkg/{cli,plugin}: add plugin name validation

* pkg/plugin/{v1,v2}: set layout key in config

 Please enter the commit message for your changes. Lines starting

Author: estroz

cmd/main.go

@@ -31,6 +31,10 @@ func main() {
 			&pluginv1.Plugin{},
 			&pluginv2.Plugin{},
 		),
+		cli.WithDefaultPlugins(
+			&pluginv1.Plugin{},
+			&pluginv2.Plugin{},
+		),
 		cli.WithExtraCommands(
 			newEditCmd(),
 			newUpdateCmd(),

designs/extensible-cli-and-scaffolding-plugins-phase-1.md

@@ -62,7 +62,7 @@ project versions (via `SupportedProjectVersions()`).
 Example `PROJECT` file:
 
 ```yaml
-version: "3-alpha"
+version: "2"
 layout: go/v1.0.0
 domain: testproject.org
 repo: github.com/test-inc/testproject

pkg/cli/api.go

@@ -55,14 +55,9 @@ func (c cli) newAPIContext() plugin.Context {
 }
 
 func (c cli) bindCreateAPI(ctx plugin.Context, cmd *cobra.Command) {
-	versionedPlugins, err := c.getVersionedPlugins()
-	if err != nil {
-		cmdErr(cmd, err)
-		return
-	}
 	var getter plugin.CreateAPIPluginGetter
 	var hasGetter bool
-	for _, p := range versionedPlugins {
+	for _, p := range c.resolvedPlugins {
 		tmpGetter, isGetter := p.(plugin.CreateAPIPluginGetter)
 		if isGetter {
 			if hasGetter {