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function Verify-Checksum
{
Param (
[string]$File=$(throw("You must specify a filename to get the checksum of.")),
[string]$Expected=$(throw("Checksum required")),
[ValidateSet("sha1","md5")][string]$Algorithm="sha1"
)
Write-Host "Verifying checksum of $File"
$fs = new-object System.IO.FileStream $File, "Open"
$algo = [type]"System.Security.Cryptography.$Algorithm"
$crypto = $algo::Create()
$hash = [BitConverter]::ToString($crypto.ComputeHash($fs)).Replace("-", "")
$fs.Close()
if ($hash -ne $Expected) {
throw "Checksum verification failed, got: '$hash' expected: '$Expected'"
}
}
function Run-Executable
{
Param (
[string]$Executable=$(throw("You must specify a program to run.")),
[string[]]$Arguments
)
if ([string]::IsNullOrEmpty($Arguments)) {
Write-Host "Running `"$Executable`""
$p = Start-Process -FilePath "$Executable" -Wait -PassThru
} else {
Write-Host "Running `"$Executable`" with arguments `"$Arguments`""
$p = Start-Process -FilePath "$Executable" -ArgumentList $Arguments -Wait -PassThru
}
if ($p.ExitCode -ne 0) {
throw "Process $($Executable) exited with exit code $($p.ExitCode)"
}
}
function Extract-7Zip
{
Param (
[string]$Source,
[string]$Destination,
[string]$Filter
)
Write-Host "Extracting '$Source' to '$Destination'..."
if ((Get-Command "7z.exe" -ErrorAction SilentlyContinue) -eq $null) {
$zipExe = join-path (${env:ProgramFiles(x86)}, ${env:ProgramFiles}, ${env:ProgramW6432} -ne $null)[0] '7-zip\7z.exe'
if (-not (test-path $zipExe)) {
$zipExe = "C:\Utils\sevenzip\7z.exe"
if (-not (test-path $zipExe)) {
throw "Could not find 7-zip."
}
}
} else {
$zipExe = "7z.exe"
}
if ([string]::IsNullOrEmpty($Filter)) {
Run-Executable "$zipExe" "x -y `"-o$Destination`" `"$Source`""
} else {
Run-Executable "$zipExe" "x -y -aoa `"-o$Destination`" `"$Source`" $Filter"
}
}
function BadParam
{
Param ([string]$Description)
throw("You must specify $Description")
}
function Download
{
Param (
[string] $OfficialUrl = $(BadParam("the official download URL")),
[string] $CachedUrl = $(BadParam("the locally cached URL")),
[string] $Destination = $(BadParam("a download target location"))
)
$ProgressPreference = 'SilentlyContinue'
try {
Write-Host "Downloading from cached location ($CachedUrl) to $Destination"
if ($CachedUrl.StartsWith("http")) {
Invoke-WebRequest -UseBasicParsing $CachedUrl -OutFile $Destination
} else {
Copy-Item $CachedUrl $Destination
}
} catch {
Write-Host "Cached download failed: Downloading from official location: $OfficialUrl"
Invoke-WebRequest -UseBasicParsing $OfficialUrl -OutFile $Destination
}
}
function Add-Path
{
Param (
[string]$Path
)
Write-Host "Adding $Path to Path"
$oldPath = [System.Environment]::GetEnvironmentVariable('Path', 'Machine')
[Environment]::SetEnvironmentVariable("Path", $oldPath + ";$Path", [EnvironmentVariableTarget]::Machine)
$Env:PATH = [System.Environment]::GetEnvironmentVariable('Path', 'Machine')
}
function Set-EnvironmentVariable
{
Param (
[string]$Key = $(BadParam("a key")),
[string]$Value = $(BadParam("a value."))
)
Write-Host "Setting environment variable `"$($Key)`" to `"$($Value)`""
[Environment]::SetEnvironmentVariable($Key, $Value, [EnvironmentVariableTarget]::Machine)
}
function Is64BitWinHost
{
return [environment]::Is64BitOperatingSystem
}
function IsProxyEnabled {
return (Get-ItemProperty -Path 'HKCU:\Software\Microsoft\Windows\CurrentVersion\Internet Settings').proxyEnable
}
function Get-Proxy {
return (Get-ItemProperty -Path 'HKCU:\Software\Microsoft\Windows\CurrentVersion\Internet Settings').proxyServer
}
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