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# Copyright (c) 2016 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
# Note: to run this on e.g. OSX for adhoc testing or debugging in case Windows
# is not around:
#
# pwsh
# PS ...> $ExecutionContext.SessionState.LanguageMode = "ConstrainedLanguage"
# PS ...> ./.cipd_impl.ps1 -CipdBinary _cipd.exe `
# -BackendURL https://chrome-infra-packages.appspot.com `
# -VersionFile ./cipd_client_version
# file _cipd.exe
param(
# Path to download the CIPD binary to.
[Parameter(Mandatory = $true)]
[string]
$CipdBinary,
# CIPD platform to download the client for.
[string]
$Platform = "windows-amd64",
# E.g. "https://chrome-infra-packages.appspot.com".
[Parameter(Mandatory = $true)]
[string]
$BackendURL,
# Path to the cipd_client_version file with the client version.
[Parameter(Mandatory = $true)]
[string]
$VersionFile
)
# Import PowerShell<=5 Get-Filehash from Microsoft.PowerShell.Utility.
# This prevents loading of incompatible Get-FileHash from PowerShell 6+ $PSModulePath.
# See: crbug.com/1443163.
Import-Module $PSHOME\Modules\Microsoft.PowerShell.Utility -Function Get-FileHash
$DepotToolsPath = Split-Path $MyInvocation.MyCommand.Path -Parent
# Put depot_tool's git revision into the user agent string.
try {
$DepotToolsVersion = &git -C $DepotToolsPath rev-parse HEAD 2>&1
if ($LastExitCode -eq 0) {
$UserAgent = "depot_tools/$DepotToolsVersion"
} else {
$UserAgent = "depot_tools/???"
}
} catch [System.Management.Automation.CommandNotFoundException] {
$UserAgent = "depot_tools/no_git/???"
}
$Env:CIPD_HTTP_USER_AGENT_PREFIX = $UserAgent
# Returns the expected SHA256 hex digest for the given platform reading it from
# *.digests file.
function Get-Expected-SHA256($platform) {
$digestsFile = $VersionFile+".digests"
foreach ($line in Get-Content $digestsFile) {
if ($line -match "^([0-9a-z\-]+)\s+sha256\s+([0-9a-f]+)$") {
if ($Matches[1] -eq $platform) {
return $Matches[2]
}
}
}
throw "No SHA256 digests for $platform in $digestsFile"
}
# Retry a command with a delay between each.
function Retry-Command {
[CmdletBinding()]
param (
[Parameter(Mandatory = $true)]
[scriptblock]
$Command,
[int]
$MaxAttempts = 3,
[timespan]
$Delay = (New-TimeSpan -Seconds 5)
)
$attempt = 0
while ($attempt -lt $MaxAttempts) {
try {
Invoke-Command -ScriptBlock $Command
return
}
catch {
$attempt += 1
$exception = $_.Exception.InnerException
if ($attempt -lt $MaxAttempts) {
Write-Output "FAILURE: " + $_
Write-Output "Retrying after a short nap..."
Start-Sleep -Seconds $Delay.TotalSeconds
} else {
throw $exception
}
}
}
}
# Check is url in the NO_PROXY of Environment?
function Is-UrlInNoProxy {
[CmdletBinding()]
param (
[Parameter(Mandatory)]
[string]$Url
)
$NoProxy = $Env:NO_PROXY
if ([string]::IsNullOrEmpty($NoProxy)) {
return $false
}
$NoProxyList = $NoProxy -split ',' | ForEach-Object { $_.Trim().ToLower() }
$UriHost = ([uri]$Url).Host.ToLower()
foreach ($entry in $NoProxyList) {
if ($entry.StartsWith('.')) {
if ($UriHost.EndsWith($entry.Substring(1))) {
return $true
}
} elseif ($entry -eq $UriHost) {
return $true
}
}
return $false
}
$ExpectedSHA256 = Get-Expected-SHA256 $Platform
$Version = (Get-Content $VersionFile).Trim()
$URL = "$BackendURL/client?platform=$Platform&version=$Version"
# Fetch the binary now that the lock is ours.
$TmpPath = $CipdBinary + ".tmp." + $PID
try {
Write-Output "Downloading CIPD client for $Platform from $URL..."
$Parameters = @{
UserAgent = $UserAgent
Uri = $URL
OutFile = $TmpPath
}
if ($Env:HTTPS_PROXY) {
$Proxy = $Env:HTTPS_PROXY
} elseif ($Env:HTTP_PROXY) {
$Proxy = $Env:HTTP_PROXY
} elseif ($Env:ALL_PROXY) {
$Proxy = $Env:ALL_PROXY
} else {
$Proxy = $null
}
$UrlNotInNoProxy = -not (Is-UrlInNoProxy -Url $URL)
if ($UrlNotInNoProxy -and $Proxy) {
Write-Output "Using Proxy $Proxy..."
$Parameters.Proxy = $Proxy
}
Retry-Command {
$ProgressPreference = "SilentlyContinue"
Invoke-WebRequest @Parameters
}
$ActualSHA256 = (Get-FileHash -Path $TmpPath -Algorithm "SHA256").Hash.toLower()
if ($ActualSHA256 -ne $ExpectedSHA256) {
throw "Invalid SHA256 digest: $ActualSHA256 != $ExpectedSHA256"
}
Move-Item -LiteralPath $TmpPath -Destination $CipdBinary -Force
} catch {
Remove-Item -Path $TmpPath -ErrorAction Ignore
throw # Re raise any error
}
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