fix(scripts): update get script

Signed-off-by: Matthew Fisher <matt.fisher@microsoft.com>

scripts/get

@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-# Copyright 2016 The Kubernetes Authors All rights reserved.
+# Copyright The Helm Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -18,7 +18,9 @@
 # the package manager for Go: https://github.com/Masterminds/glide.sh/blob/master/get
 
 PROJECT_NAME="helm"
+TILLER_NAME="tiller"
 
+: ${USE_SUDO:="true"}
 : ${HELM_INSTALL_DIR:="/usr/local/bin"}
 
 # initArch discovers the architecture for this system.
@@ -27,7 +29,7 @@ initArch() {
   case $ARCH in
     armv5*) ARCH="armv5";;
     armv6*) ARCH="armv6";;
-    armv7*) ARCH="armv7";;
+    armv7*) ARCH="arm";;
     aarch64) ARCH="arm64";;
     x86) ARCH="386";;
     x86_64) ARCH="amd64";;
@@ -50,7 +52,7 @@ initOS() {
 runAsRoot() {
   local CMD="$*"
 
-  if [ $EUID -ne 0 ]; then
+  if [ $EUID -ne 0 -a $USE_SUDO = "true" ]; then
     CMD="sudo $CMD"
   fi
 
@@ -75,16 +77,16 @@ verifySupported() {
 
 # checkDesiredVersion checks if the desired version is available.
 checkDesiredVersion() {
-  # Use the GitHub releases webpage for the project to find the desired version for this project.
-  local release_url="https://github.com/helm/helm/releases/${DESIRED_VERSION:-latest}"
+  if [ "x$DESIRED_VERSION" == "x" ]; then
+    # Get tag from release URL
+    local latest_release_url="https://github.com/helm/helm/releases/latest"
     if type "curl" > /dev/null; then
-    TAG=$(curl -SsL $release_url | awk '/\/tag\//' | grep -v no-underline | cut -d '"' -f 2 | awk '{n=split($NF,a,"/");print a[n]}' | awk 'a !~ $0{print}; {a=$0}')
+      TAG=$(curl -Ls -o /dev/null -w %{url_effective} $latest_release_url | grep -oE "[^/]+$" )
     elif type "wget" > /dev/null; then
-    TAG=$(wget -q -O - $release_url | awk '/\/tag\//' | grep -v no-underline | cut -d '"' -f 2 | awk '{n=split($NF,a,"/");print a[n]}' | awk 'a !~ $0{print}; {a=$0}')
+      TAG=$(wget $latest_release_url --server-response -O /dev/null 2>&1 | awk '/^  Location: /{DEST=$2} END{ print DEST}' | grep -oE "[^/]+$")
     fi
-  if [ "x$TAG" == "x" ]; then
-    echo "Cannot determine ${DESIRED_VERSION} tag."
-    exit 1
+  else
+    TAG=$DESIRED_VERSION
   fi
 }
 
@@ -92,7 +94,7 @@ checkDesiredVersion() {
 # if it needs to be changed.
 checkHelmInstalledVersion() {
   if [[ -f "${HELM_INSTALL_DIR}/${PROJECT_NAME}" ]]; then
-    local version=$(helm version | grep '^Client' | cut -d'"' -f2)
+    local version=$("${HELM_INSTALL_DIR}/${PROJECT_NAME}" version -c | grep '^Client' | cut -d'"' -f2)
     if [[ "$version" == "$TAG" ]]; then
       echo "Helm ${version} is already ${DESIRED_VERSION:-latest}"
       return 0
@@ -141,8 +143,16 @@ installFile() {
   mkdir -p "$HELM_TMP"
   tar xf "$HELM_TMP_FILE" -C "$HELM_TMP"
   HELM_TMP_BIN="$HELM_TMP/$OS-$ARCH/$PROJECT_NAME"
-  echo "Preparing to install into ${HELM_INSTALL_DIR}"
+  TILLER_TMP_BIN="$HELM_TMP/$OS-$ARCH/$TILLER_NAME"
+  echo "Preparing to install $PROJECT_NAME and $TILLER_NAME into ${HELM_INSTALL_DIR}"
   runAsRoot cp "$HELM_TMP_BIN" "$HELM_INSTALL_DIR"
+  echo "$PROJECT_NAME installed into $HELM_INSTALL_DIR/$PROJECT_NAME"
+  if [ -x "$TILLER_TMP_BIN" ]; then
+    runAsRoot cp "$TILLER_TMP_BIN" "$HELM_INSTALL_DIR"
+    echo "$TILLER_NAME installed into $HELM_INSTALL_DIR/$TILLER_NAME"
+  else
+    echo "info: $TILLER_NAME binary was not found in this release; skipping $TILLER_NAME installation"
+  fi
 }
 
 # fail_trap is executed if an error occurs.
@@ -164,7 +174,6 @@ fail_trap() {
 # testVersion tests the installed client to make sure it is working.
 testVersion() {
   set +e
-  echo "$PROJECT_NAME installed into $HELM_INSTALL_DIR/$PROJECT_NAME"
   HELM="$(which $PROJECT_NAME)"
   if [ "$?" = "1" ]; then
     echo "$PROJECT_NAME not found. Is $HELM_INSTALL_DIR on your "'$PATH?'
@@ -180,6 +189,7 @@ help () {
   echo -e "\t[--help|-h ] ->> prints this help"
   echo -e "\t[--version|-v <desired_version>] . When not defined it defaults to latest"
   echo -e "\te.g. --version v2.4.0  or -v latest"
+  echo -e "\t[--no-sudo]  ->> install without sudo"
 }
 
 # cleanup temporary files to avoid https://github.com/helm/helm/issues/2977
@@ -209,6 +219,9 @@ while [[ $# -gt 0 ]]; do
            exit 0
        fi
        ;;
+    '--no-sudo')
+       USE_SUDO="false"
+       ;;
     '--help'|-h)
        help
        exit 0