ref(docs): update plugin install documentation

cmd/helm/plugin_install.go

@@ -33,11 +33,19 @@ type pluginInstallCmd struct {
 	out     io.Writer
 }
 
+const pluginInstallDesc = `
+This command allows you to install a plugin from a url to a VCS repo or a local path.
+
+Example usage:
+    $ helm plugin install https://github.com/technosophos/helm-template
+`
+
 func newPluginInstallCmd(out io.Writer) *cobra.Command {
 	pcmd := &pluginInstallCmd{out: out}
 	cmd := &cobra.Command{
 		Use:   "install [options] <path|url>...",
 		Short: "install one or more Helm plugins",
+		Long:  pluginInstallDesc,
 		PreRunE: func(cmd *cobra.Command, args []string) error {
 			return pcmd.complete(args)
 		},

docs/helm/helm_plugin_install.md

@@ -5,7 +5,12 @@ install one or more Helm plugins
 ### Synopsis
 
 
-install one or more Helm plugins
+
+This command allows you to install a plugin from a url to a VCS repo or a local path.
+
+Example usage:
+    $ helm plugin install https://github.com/technosophos/helm-template
+
 
 ```
 helm plugin install [options] <path|url>...
@@ -31,4 +36,4 @@ helm plugin install [options] <path|url>...
 ### SEE ALSO
 * [helm plugin](helm_plugin.md)	 - add, list, or remove Helm plugins
 
-###### Auto generated by spf13/cobra on 7-Nov-2017
+###### Auto generated by spf13/cobra on 20-Nov-2017

docs/plugins.md

@@ -31,11 +31,10 @@ plugins do the "detail work" of performing a desired action.
 
 ## Installing a Plugin
 
-A Helm plugin management system is in the works. But in the short term, plugins
-are installed by copying the plugin directory into `$(helm home)/plugins`.
+Plugins are installed using the `$ helm plugin install <path|url> command. You can pass in a path to a plugin on your local file system or a url of a remote VCS repo. The `helm plugin install` command clones or copies the plugin at the path/url given into `$ (helm home)/plugins`
 
 ```console
-$ cp -a myplugin/ $(helm home)/plugins/
+$ helm plugin install https://github.com/technosophos/helm-template
 ```
 
 If you have a plugin tar distribution, simply untar the plugin into the