update README

installer/README.md

@@ -1,45 +1,74 @@
 # deno_install
 
-- This command installs executable deno script.
+Installs remote or local script as executable.
 
-## Features
+````
+## Installation
 
-- Install executable script into ~/.deno/bin
+`installer` can be install using iteself:
+
+```sh
+deno -A https://deno.land/std/install/deno_install.ts https://deno.land/std/install/deno_install.ts -A
+````
+
+Installer uses `~/.deno/bin` to store installed scripts so make sure it's in `$PATH`
+
+```
+echo 'export PATH="$HOME/.deno/bin:$PATH"' >> ~/.bashrc # change this to your shell
+```
 
 ## Usage
 
+Install script
+
 ```sh
-$ deno_install https://deno.land/std/http/file_server.ts
-> file_server requests network access. Grant permanently? [yN] # Grant the permissions to use command.
-> y
-> Successfully installed file_server.
-$ file_server # now you can use installed command!
+$ deno_install https://deno.land/std/http/file_server.ts --allow-net --allow-read
+> Downloading: https://deno.land/std/http/file_server.ts
+>
+> ✅ Successfully installed file_server.
+
+# local script
+$ deno_install ./deno_std/http/file_server.ts --allow-net --allow-read
+> Looking for: /dev/deno_std/http/file_server.ts
+>
+> ✅ Successfully installed file_server.
 ```
 
-## Installing
+Use installed script:
 
-### 1. Install deno_install
+```sh
+$ file_server
+HTTP server listening on http://0.0.0.0:4500/
+```
 
-deno_install can be installed by using itself.
+Update installed script
 
 ```sh
-deno -A https://deno.land/std/install/deno_install.ts https://deno.land/std/install/deno_install.ts
+$ deno_install https://deno.land/std/http/file_server.ts --allow-net --allow-read
+> ⚠️  file_server is already installed, do you want to overwrite it? [yN]
+> y
+>
+> Downloading: https://deno.land/std/http/file_server.ts
+>
+> ✅ Successfully installed file_server.
 ```
 
-### 2. Add `~/.deno/bin` to PATH
+Uninstall script
 
+```sh
+$ deno_install uninstall file_server
+> ℹ️  Uninstalled file_server
 ```
-echo 'export PATH="$HOME/.deno/bin:$PATH"' >> ~/.bashrc # change this to your shell
-```
-
-## Create Executable Script
 
-- Add shebang to top of your deno script.
-  - This defines what permissions are needed.
+Display help
 
 ```sh
-#!/usr/bin/env deno --allow-read --allow-write --allow-env --allow-run
-```
+$ deno_install --help
+> USAGE:
+deno https://deno.land/std/installer/mod.ts SCRIPT [FLAGS...]
 
-- Host script on the web.
-- Install script using deno_install.
+ARGS:
+  SCRIPT      URL of script to install
+  [FLAGS...]  List of flags for script, both Deno permission and script specific flag can be used.
+
+```