From 7b0b8ee12638d2ccb6f3996f2441e72f26179199 Mon Sep 17 00:00:00 2001
From: Roy <contact@protoman.net>
Date: Thu, 20 Aug 2020 22:52:59 +0200
Subject: [PATCH] Add prysm.sh1 for native Windows support via PowerShell
 (#6829)

* Add prysm.sh1 for native Windows support via PowerShell
* Remove unused variable
* Merge branch 'master' into master
* Merge branch 'master' into master
* Merge branch 'master' into master
* Merge branch 'master' into master
---
 prysm.ps1 | 128 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 128 insertions(+)
 create mode 100644 prysm.ps1

diff --git a/prysm.ps1 b/prysm.ps1
new file mode 100644
index 000000000..bd9eaa4e9
--- /dev/null
+++ b/prysm.ps1
@@ -0,0 +1,128 @@
+$folderDist = "dist";
+$ProgressPreference = 'SilentlyContinue' # Disable Invoke-WebRequest progress bar, makes it silent and faster.
+
+# Complain if invalid arguments were provided.
+if ("beacon-chain", "validator", "slasher" -notcontains $args[0]) {
+    Write-Host "ERROR: prysm is only supported on 64-bit Operating Systems" -ForegroundColor Red;
+    Write-Host @"
+Usage: ./prysm.sh1 PROCESS FLAGS.
+
+PROCESS can be beacon-chain, validator, or slasher.
+FLAGS are the flags or arguments passed to the PROCESS.
+ 
+Use this script to download the latest Prysm release binaries.
+Downloaded binaries are saved to .\dist
+ 
+To specify a specific release version:
+  $env:USE_PRYSM_VERSION=v1.0.0-alpha3
+ to resume using the latest release:
+  Remove-Item env:USE_PRYSM_VERSION
+ 
+To automatically restart crashed processes:
+  $env:PRYSM_AUTORESTART=$TRUE ; .\prysm.sh1 beacon-chain
+ to stop autorestart run:
+  Remove-Item env:PRYSM_AUTORESTART
+"@;
+
+    exit;
+}
+
+# 64bit check.
+if (-not [Environment]::Is64BitOperatingSystem) {
+    Write-Host "ERROR: prysm is only supported on 64-bit Operating Systems" -ForegroundColor Red;
+    exit;
+}
+
+# Create directory for us to download our binaries to, if it not yet exists.
+if (-not (Test-Path $folderDist)) {
+    New-Item -Path . -Name $folderDist -ItemType "directory";
+}
+
+# Determine the latest release version, unless specified by $USE_PRYSM_VERSION.
+if (Test-Path env:USE_PRYSM_VERSION) {
+    Write-Host "Detected variable `$env:USE_PRYSM_VERSION=$env:USE_PRYSM_VERSION";
+    $version = $env:USE_PRYSM_VERSION;
+}
+else {
+    try {
+        $response = Invoke-WebRequest -Uri "https://prysmaticlabs.com/releases/latest";
+        $version = $response.Content.Trim();
+
+        Write-Host "Using (latest) prysm version: $version";
+    }
+    catch {
+        Write-Host "ERROR: Failed to get the latest version:" -ForegroundColor Red;
+        Write-Host "  $($_.Exception.Message)" -ForegroundColor Red;
+        exit;
+    }
+}
+
+# Make sure the binary we want to use is up to date, otherwise download (and possibly verify) it.
+$fileName = "$($args[0])-$version-windows-amd64.exe";
+$folderBin = "$folderDist\$fileName";
+
+if (Test-Path $folderBin) {
+    Write-Host "$($args[0]) is up to date with version: $version" -ForegroundColor Green;
+}
+else {
+    try {
+        Write-Host "Downloading $fileName" -ForegroundColor Green;
+
+        Invoke-WebRequest -Uri "https://prysmaticlabs.com/releases/$fileName" -OutFile "$folderBin";
+        Invoke-WebRequest -Uri "https://prysmaticlabs.com/releases/$fileName.sha256" -OutFile "$folderBin.sha256";
+        Invoke-WebRequest -Uri "https://prysmaticlabs.com/releases/$fileName.sig" -OutFile "$folderBin.sig";
+
+        Write-Host "Downloading complete!" -ForegroundColor Green;
+    }
+    catch {
+        Write-Host "ERROR: Failed to get download $fileName`:" -ForegroundColor Red;
+        Write-Host "  $($_.Exception.Message)" -ForegroundColor Red;
+        exit;
+    }
+}
+
+# GPG not natively available on Windows, external module required.
+Write-Host "WARN GPG verification is not natively available on Windows" -ForegroundColor Yellow;
+Write-Host "WARN Skipping integrity verification of downloaded binary" -ForegroundColor Yellow;
+
+# Check SHA256 File Hash before running
+Write-Host "Verifying binary authenticity with SHA256 Hash";
+$hashExpected = (Get-Content -Path "$folderBin.sha256" -Delimiter " ")[0].Trim().ToUpperInvariant();
+$hashActual = (Get-FileHash -Path $folderBin -Algorithm SHA256).Hash.ToUpperInvariant();
+if ($hashExpected -eq $hashActual) {
+    Write-Host "SHA256 Hash Match!" -ForegroundColor Green;
+}
+elseif ((Test-Path env:PRYSM_ALLOW_UNVERIFIED_BINARIES) -and $env:PRYSM_ALLOW_UNVERIFIED_BINARIES -eq $TRUE) {
+    Write-Host "WARN Failed to verify prysm binary" -ForegroundColor Yellow;
+    Write-Host "Detected `$env:PRYSM_ALLOW_UNVERIFIED_BINARIES=`$TRUE";
+    Write-Host "Proceeding...";
+}
+else {
+    Write-Host "ERROR Failed to verify prysm binary" -ForegroundColor Red;
+    Write-Host @"
+Please erase downloads in the
+dist directory and run this script again. Alternatively, you can use a
+a prior version by specifying environment variable `$env:USE_PRYSM_VERSION
+with the specific version, as desired. Example: `$env:USE_PRYSM_VERSION=v1.0.0-alpha.5
+If you must wish to continue running an unverified binary, use:
+`$env:PRYSM_ALLOW_UNVERIFIED_BINARIES=`$TRUE
+"@;
+
+    exit;
+}
+
+# Finally, start the process.
+do {
+    Write-Host "Starting: prysm $($args -join ' ')";
+
+    $argumentList = $args | Select-Object -Skip 1;
+
+    if ($argumentList.Length -gt 0) {
+        $process = Start-Process -FilePath $folderBin -ArgumentList $argumentList -NoNewWindow -PassThru -Wait;
+    }
+    else {
+        $process = Start-Process -FilePath $folderBin -NoNewWindow -PassThru -Wait;
+    }
+    
+    $restart = (Test-Path env:PRYSM_AUTORESTART) -and $env:PRYSM_AUTORESTART -eq $TRUE -and $process.ExitCode -ne 0;
+} while ($restart)
\ No newline at end of file