install.ps1

$ErrorActionPreference = "Stop"

if (-not (Get-Command "bash.exe" -ErrorAction SilentlyContinue)) {
	if (-not ([Security.Principal.WindowsPrincipal][Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator)) {
		Start-Process powershell.exe "-NoProfile -ExecutionPolicy Bypass -File `"$PSCommandPath`"" -Verb RunAs
		exit
	}
	
	if ([Environment]::Is64BitProcess) {
		$output = 'setup-x86_64.exe'
		$cygpath = 'C:\cygwin64\bin'
	} else {
		$output = 'setup-x86.exe'
		$cygpath = 'C:\cygwin\bin'
	}
	
	$directory = Join-Path ([System.IO.Path]::GetTempPath()) ([System.Guid]::NewGuid())
	New-Item -ItemType directory -Path "$directory"
	Set-Location -Path "$directory"
	echo "Working in $directory"
	
	$url = "https://cygwin.com/$output"
	echo "Downloading Cygwin installer"
	(New-Object System.Net.WebClient).DownloadFile($url, "$directory\$output")
	
	echo "Installing Cygwin"
	Start-Process powershell "-Command $directory\\$output -q -W --site http://cygwin.mirror.constant.com" -Verb runAs -PassThru -Wait
	
	Remove-Item -ErrorAction Ignore -Force -Recurse "$directory"
	
	$currentPath = [Environment]::GetEnvironmentVariable('Path', 'Machine')
	if (($currentPath).ToLower().Contains("c:\cygwin")) {
		echo "Cygwin is already on the path"
	} else {
		echo "Adding Cygwin to the path"
		[Environment]::SetEnvironmentVariable('Path', "$currentPath;$cygpath", 'Machine');
		$env:Path = [System.Environment]::GetEnvironmentVariable('Path', 'Machine') + ';' + [System.Environment]::GetEnvironmentVariable('Path', 'User')	
	}

	echo "Using windows home directories"	
	bash -c "if ! grep -q '^db_home:' /etc/nsswitch.conf; then echo 'db_home: windows' >> /etc/nsswitch.conf; fi"
}

echo "Installing forklift"
if (-not (Test-Path env:INSTALL_URL)) { $env:INSTALL_URL = 'https://raw.githubusercontent.com/g2forge/forklift/master/install' }
bash -l -c "bash <`(curl -L $env:INSTALL_URL`) $args"

rm $PSCommandPath