Setup.ps1

#Requires -Version 2.0

<#
    .SYNOPSIS
        Downloads, unpacks, and prepares a portable
        Java development environment.
        Big thanks to https://github.com/toksaitov/AndroidStudioPortable
 #>

#
# Definitions
#

. '.\Definitions.ps1'

#
# Helpers
#

. '.\Helpers.ps1'

#
# Steps
#

#
# Download and unpack lessmsi to be able to unpack
# a 7-Zip installer later.
#

$ToolsAreRequired = !(Test-Path -Path $OracleJDKDirectory)

if ($ToolsAreRequired -And !(Test-Path -Path $LessMSIDirectory))
{
    if (!(Test-Path -Path $LessMSIArchive))
    {
        Write-Output "Get LessMSI"
        Invoke-WebRequest -Uri $LessMSIURL -OutFile $LessMSIArchive
    }
    Write-Output "Expand LessMSI"
    Expand-Archive -Path $LessMSIArchive
}

#
# Download and unpack the 7-Zip installer.
#

if ($ToolsAreRequired -And !(Test-Path -Path $7zDirectory))
{
    if (!(Test-Path -Path $7zInstaller))
    {
        Write-Output "Get 7-Zip"
        Invoke-WebRequest -Uri $7zURL -OutFile $7zInstaller
    }

    Write-Output "Use LessMSI to unpack 7zip"
    & ".\$LessMSIDirectory\$LessMSIExecutable" 'x' $7zInstaller
}

#
# Check the architecture of the OS and change to 64bit if necessary.
#

if ([System.Environment]::Is64BitProcess) {
	Write-Output "Detected 64bit OS, switching...";
	$OracleJDK = $OracleJDK64;
	$OracleJDKInstaller = $OracleJDKInstaller64;
	$OracleJDKURL = $OracleJDKURL64;
	$OracleJDKDirectory = $OracleJDKDirectory64;
	$OracleJDKBinariesDirectory = $OracleJDKBinariesDirectory64;
}

#
# Download and unpack an Oracle JDK installer without administrative rights.
#

if (!(Test-Path -Path $OracleJDKDirectory))
{
    if (!(Test-Path -Path $OracleJDKInternalArchive))
    {
        if (!(Test-Path -Path $OracleJDKInternalCAB))
        {

            if (!(Test-Path -Path $OracleJDKInstaller))
            {
                #
                # Download the Oracle JDK installer accepting the
                #
                #     `Oracle Binary Code License Agreement for Java SE`
                #


				$Url = $OracleJDKURL;
				$OutFile = $OracleJDKInstaller;
                Write-Output "Download Java JDK $OracleJDK"
				Invoke-WebRequest -Uri $Url -OutFile $OutFile -UserAgent [Microsoft.PowerShell.Commands.PSUserAgent]::FireFox
            }

            #
            # Unpack the Oracle JDK installer with 7-Zip.
            #

            Write-Output "Unpack JDK installer"
            & ".\$7zDirectory\$7zExecutable"                      `
                'e' $OracleJDKInstaller                           `
                "$OracleJDKInternalCABPath\$OracleJDKInternalCAB" `
                '-y'
        }

        #
        # Unpack the Oracle JDK Tools CAB with 7-Zip.
        #

        Write-Output "Unpack JDK archive"
        & ".\$7zDirectory\$7zExecutable"     `
            'e' $OracleJDKInternalCAB        `
            "$OracleJDKInternalArchive" '-y'
    }

    Write-Output "Unpack JDK"
    & ".\$7zDirectory\$7zExecutable" 'x' $OracleJDKInternalArchive `
                                     "-o$OracleJDKDirectory" '-y'
}

#
# Unpack Oracle JDK `.pack` files with the unpack200
# utility bundled with the JDK.
#

Write-Output "Expand JDK files"
$GetChildItemParameters = @{
    Path = $OracleJDKDirectory;
    Filter = '*.pack';
}
$PackFiles =
    Get-ChildItem @GetChildItemParameters -Recurse

if ($PackFiles)
{
    foreach ($File in $PackFiles)
    {
        $PackFileName =
            $File.FullName
        $JarFileName =
            "$($File.DirectoryName)\$($File.BaseName).jar"

        & "$OracleJDKBinariesDirectory\unpack200" '-r' `
            $PackFileName $JarFileName
    }
}

#
# Remove temporary files.
#
$LessMSIRootDirectory =
    Get-RelativeRootDirectory -RelativePath $LessMSIDirectory
$7zRootDirectory =
    Get-RelativeRootDirectory -RelativePath $7zDirectory

$TemporaryFiles = @(
    $LessMSIArchive,
    $LessMSIRootDirectory,
    $7zInstaller,
    $7zRootDirectory,
    $OracleJDKInstaller,
    $OracleJDKInternalCAB,
    $OracleJDKInternalArchive
)

$RemoveItemParameters = @{
    Path = $TemporaryFiles;
    ErrorAction = 'SilentlyContinue';
}
Remove-Item @RemoveItemParameters -Recurse -Force

#
# Generate a batch file to create env variables JDK.
#

$BatchContent = @"
@echo off
REM
REM Create temporary environment variables for JDK.
REM
REM This file is automatically generated. Please, do not edit this file.
REM


SETX JAVA_HOME %~dp0$OracleJDKDirectory
for /f "skip=2 tokens=3*" %%1 in ('reg query HKCU\Environment /v PATH') do @if [%%2]==[] ( @setx PATH "%%~1;%JAVA_HOME\bin" ) else ( @setx PATH "%%~1 %%~2;%JAVA_HOME\bin" )

"@

$NewItemParameters = @{
    Path = './start.bat';
    Type = 'File';
    Value = $BatchContent;
}
New-Item @NewItemParameters -Force

#
# The end.
#

Write-Output "`nDone."