Add cipd bootstrap scripts to depot_tools.

This takes advantage of powershell on windows for a cleanish duplicate of the
posix version.

R=dnj@chromium.org, vadimsh@chromium.org
BUG=663843

Change-Id: Ib23a044ff912e3239b58848a26143eb6575826d5
Reviewed-on: https://chromium-review.googlesource.com/414228
Commit-Queue: Robbie Iannucci <iannucci@chromium.org>
Reviewed-by: Vadim Shtayura <vadimsh@chromium.org>

.gitignore

 # Ignore any python bytecode.
 *.pyc
 
+# ignore cipd client files
+/.cipd_client*
+/.versions
+
 # Ignore the batch files produced by the Windows bootstrapping.
 /git-bash
 /git.bat

cipd

+#!/bin/bash -e
+
+# 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.
+
+MYPATH=$(dirname "${BASH_SOURCE[0]}")
+
+: ${CIPD_CLIENT_VER:=`cat $MYPATH/cipd_client_version`}
+: ${CIPD_CLIENT_SRV:='https://chrome-infra-packages.appspot.com'}
+
+UNAME=`uname -s | tr '[:upper:]' '[:lower:]'`
+case $UNAME in
+  linux)
+    PLAT=linux
+    ;;
+  cygwin*|msys*|mingw*)
+    PLAT=windows
+    ;;
+  darwin)
+    PLAT=mac
+    ;;
+  *)
+    echo "UNKNOWN OS: $UNAME"
+    exit 1
+esac
+
+UNAME=`uname -m | tr '[:upper:]' '[:lower:]'`
+case $UNAME in
+  x86_64|amd64)
+    ARCH=amd64
+    ;;
+  arm*)
+    ARCH=$UNAME
+    ;;
+  *86)
+    ARCH=386
+    ;;
+  *)
+    echo "UNKNOWN Machine architecture: $UNAME"
+    exit 1
+esac
+
+URL="$CIPD_CLIENT_SRV/client?platform=${PLAT}-${ARCH}&version=$CIPD_CLIENT_VER"
+CLIENT="$MYPATH/.cipd_client"
+
+USER_AGENT="depot_tools/$(git -C $MYPATH rev-parse HEAD 2>/dev/null || echo "???")"
+
+if [ ! -e "$CLIENT" ]; then
+  echo "Bootstrapping cipd client for ${PLAT}-${ARCH}..."
+  echo "From $URL"
+  if hash curl 2> /dev/null ; then
+    curl "$URL" -A "$USER_AGENT"  -L -o "$CLIENT"
+    chmod +x "$CLIENT"
+  else
+    echo Your platform is missing the \`curl\` command. Please use your package
+    echo manager to install it before continuing.
+    echo
+    echo Alternately, manually download:
+    echo   "$URL"
+    echo To $CLIENT, and then re-run this command.
+    exit 1
+  fi
+fi
+
+export CIPD_HTTP_USER_AGENT_PREFIX=$USER_AGENT
+if ! "$CLIENT" selfupdate -version "$CIPD_CLIENT_VER" ; then
+  echo -n "selfupdate failed: " 1>&2
+  echo "run \`CIPD_HTTP_USER_AGENT_PREFIX=$USER_AGENT/manual $CLIENT selfupdate -version '$CIPD_CLIENT_VER'\` to diagnose" 1>&2
+  echo "" 1>&2
+fi
+
+exec "$CLIENT" "${@}"

cipd.bat

+@echo off
+:: 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.
+
+powershell -NoProfile -ExecutionPolicy RemoteSigned -File "%~dp0\cipd.ps1" %*

cipd.ps1

+# 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.
+
+$myPath = Split-Path $MyInvocation.MyCommand.Path -Parent
+
+function GetEnvVar([string] $key, [scriptblock] $defaultFn) {
+    if (Test-Path "Env:\$key") {
+        return Get-ChildItem $Env $key
+    }
+    return $defaultFn.Invoke()
+}
+
+$cipdClientVer = GetEnvVar "CIPD_CLIENT_VER" {
+  Get-Content (Join-Path $myPath -ChildPath 'cipd_client_version') -First 1
+}
+$cipdClientSrv = GetEnvVar "CIPD_CLIENT_SRV" {
+  "https://chrome-infra-packages.appspot.com"
+}
+
+$plat="windows"
+if ([environment]::Is64BitOperatingSystem)  {
+  $arch="amd64"
+} else {
+  $arch="386"
+}
+
+$url = "$cipdClientSrv/client?platform=$plat-$arch&version=$cipdClientVer"
+$client = Join-Path $myPath -ChildPath ".cipd_client.exe"
+
+$depot_tools_version = &git -C $myPath rev-parse HEAD 2>&1
+if ($LastExitCode -eq 0) {
+  $user_agent = "depot_tools/$depot_tools_version"
+} else {
+  $user_agent = "depot_tools/???"
+}
+
+$Env:CIPD_HTTP_USER_AGENT_PREFIX = $user_agent
+if (!(Test-Path $client)) {
+    echo "Bootstrapping cipd client for $plat-$arch..."
+    echo "From $url"
+    # TODO(iannucci): It would be really nice if there was a way to get this to
+    # show progress without also completely destroying the download speed, but
+    # I can't seem to find a way to do it. Patches welcome :)
+    $wc = (New-Object System.Net.WebClient)
+    $wc.Headers.add('User-Agent', $user_agent)
+    $wc.DownloadFile($url, $client)
+}
+
+$_ = & $client selfupdate -version "$cipdClientVer"
+if ($LastExitCode -ne 0) {
+    Write-Host "selfupdate failed: " -ForegroundColor Red -NoNewline
+    Write-Host "run ``set CIPD_HTTP_USER_AGENT_PREFIX=$user_agent/manual && $client selfupdate -version $cipdClientVer`` to diagnose`n" -ForegroundColor White
+}
+
+& $client @args
+exit $LastExitCode

cipd_client_version

+git_revision:05844bd9d1200cba8449b936b76e25eb90eabe25