add install from powershell

README.md

@@ -118,13 +118,11 @@ SOURCE CODE:
   https://github.com/whatchanged-community/whatchanged
 ```
 
-### Installation
+### Install
 
-#### Install via shell
+Shell(Mac/Linux)
 
-If you are using Linux/macOS. you can install it with the following command:
-
-```shell
+```bash
 # install latest version
 curl -fsSL https://raw.githubusercontent.com/whatchanged-community/whatchanged/master/install.sh | bash
 # or install specified version
@@ -133,28 +131,24 @@ curl -fsSL https://raw.githubusercontent.com/whatchanged-community/whatchanged/m
 curl -sf https://gobinaries.com/whatchanged-community/[email protected] | sh
 ```
 
-#### Install from Github release page
-
-Download the executable file for your platform at [release page](https://github.com/whatchanged-community/whatchanged/releases) and put the executable file to `$PATH` then try it.
+PowerShell (Windows):
 
 ```bash
-$ whatchanged --help
+iwr https://github.com/whatchanged-community/whatchanged/raw/master/install.ps1 -useb | iex
 ```
 
-### Build from source code
+Github release page(All platforms)
 
-Make sure you have `[email protected]` and [goreleaser](https://github.com/goreleaser/goreleaser) installed.
+Download the executable file for your platform at [release page](https://github.com/whatchanged-community/whatchanged/releases) and put the executable file to `$PATH` then try the following command:
 
-```shell
-$ git clone https://github.com/whatchanged-community/whatchanged.git $GOPATH/src/github.com/whatchanged-community/whatchanged
-$ cd $GOPATH/src/github.com/whatchanged-community/whatchanged
-$ make build
+```bash
+$ whatchanged --help
 ```
 
-### Test
+Build and install from source using [Golang](https://golang.org):
 
 ```bash
-$ make test
+go install github.com/whatchanged-community/[email protected]
 ```
 
 ### FAQ

install.ps1

@@ -0,0 +1,61 @@
+#!/usr/bin/env pwsh
+# inherit from https://deno.land/x/[email protected]/install.ps1
+# Copyright 2018 the Deno authors. All rights reserved. MIT license.
+
+$ErrorActionPreference = 'Stop'
+
+if ($v) {
+  $Version = "v${v}"
+}
+if ($args.Length -eq 1) {
+  $Version = $args.Get(0)
+}
+
+if (Test-Path C:\Windows\SysNative) {
+  $arch = "amd64"
+} else {
+  $arch = "386"
+}
+
+$BinDir = "$Home\bin"
+$is64Bit = Test-Path C:\Windows\SysNative
+$WhatchangedTarGz = "$BinDir\whatchanged.tar.gz"
+$WhatchangedExe = "$BinDir\whatchanged.exe"
+$Target = "windows_$arch"
+
+# GitHub requires TLS 1.2
+[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12
+
+$ResourceUri = if (!$Version) {
+  "https://github.com/whatchanged-community/whatchanged/releases/latest/download/whatchanged_${Target}.tar.gz"
+} else {
+  "https://github.com/whatchanged-community/whatchanged/releases/download/${Version}/whatchanged_${Target}.tar.gz"
+}
+
+if (!(Test-Path $BinDir)) {
+  New-Item $BinDir -ItemType Directory | Out-Null
+}
+
+Invoke-WebRequest $ResourceUri -OutFile $WhatchangedTarGz -UseBasicParsing
+
+if (Get-Command Expand-Archive -ErrorAction SilentlyContinue) {
+  Expand-Archive $WhatchangedTarGz -Destination $BinDir -Force
+} else {
+  if (Test-Path $WhatchangedExe) {
+    Remove-Item $WhatchangedExe
+  }
+  Add-Type -AssemblyName System.IO.Compression.FileSystem
+  [IO.Compression.ZipFile]::ExtractToDirectory($WhatchangedTarGz, $BinDir)
+}
+
+Remove-Item $WhatchangedTarGz
+
+$User = [EnvironmentVariableTarget]::User
+$Path = [Environment]::GetEnvironmentVariable('Path', $User)
+if (!(";$Path;".ToLower() -like "*;$BinDir;*".ToLower())) {
+  [Environment]::SetEnvironmentVariable('Path', "$Path;$BinDir", $User)
+  $Env:Path += ";$BinDir"
+}
+
+Write-Output "Whatchanged was installed successfully to $WhatchangedExe"
+Write-Output "Run 'whatchanged --help' to get started"