dashboard, env: add js-wasm-node18 builder

Build and use a new container image with Node.js v18.12.1:

$ docker run gcr.io/symbolic-datum-552/js-wasm-node18:latest /usr/bin/node --version
v18.12.1

Use this as an opportunity to tweak/simplify the builder configuration
a bit. For example, drop the dist test skips for "nolibgcc:crypto/x509"
and "vendor/golang.org/x/arch" since they're no-ops, and try 3 helpers
at first since I feel that might work well, and in the worst case will
give us useful timing data.

Add it as a non-trybot with a known issue first. Once it works, I'll
switch it to be the default trybot, and drop the old builder when it
stops being useful.

For golang/go#57017.

Change-Id: I89188fedbc6c636579754402a1ad81c588f92d71
Reviewed-on: https://go-review.googlesource.com/c/build/+/460036
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Johan Brandhorst-Satzkorn <johan.brandhorst@gmail.com>
Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org>
diff --git a/dashboard/builders.go b/dashboard/builders.go
index c5aa51d..2ba99db 100644
--- a/dashboard/builders.go
+++ b/dashboard/builders.go
@@ -285,10 +285,15 @@
 		SSHUsername:    "root",
 	},
 	"host-linux-amd64-js-wasm": {
-		Notes:          "Container with node.js for testing js/wasm.",
+		Notes:          "Container with Node.js 14 for testing js/wasm.",
 		ContainerImage: "js-wasm:latest",
 		SSHUsername:    "root",
 	},
+	"host-linux-amd64-js-wasm-node18": {
+		Notes:          "Container with Node.js 18 for testing js/wasm.",
+		ContainerImage: "js-wasm-node18:latest",
+		SSHUsername:    "root",
+	},
 	"host-linux-amd64-localdev": {
 		IsReverse:   true,
 		ExpectNum:   0,
@@ -1957,7 +1962,6 @@
 			}
 			return b
 		},
-
 		distTestAdjust: func(run bool, distTest string, isNormalTry bool) bool {
 			if isNormalTry {
 				if strings.Contains(distTest, "/internal/") ||
@@ -1979,6 +1983,37 @@
 		},
 	})
 	addBuilder(BuildConfig{
+		Name:        "js-wasm-node18",
+		HostType:    "host-linux-amd64-js-wasm-node18",
+		KnownIssues: []int{57017},
+		buildsRepo: func(repo, branch, goBranch string) bool {
+			b := buildRepoByDefault(repo)
+			switch repo {
+			case "benchmarks", "debug", "perf", "talks", "tools", "tour", "website":
+				// Don't test these golang.org/x repos.
+				b = false
+			}
+			if repo != "go" && !(branch == "master" && goBranch == "master") {
+				// For golang.org/x repos, don't test non-latest versions.
+				b = false
+			}
+			return b
+		},
+		distTestAdjust: func(run bool, distTest string, isNormalTry bool) bool {
+			if isNormalTry && (strings.Contains(distTest, "/internal/") || distTest == "reboot") {
+				// Skip some tests in an attempt to speed up normal trybots, inherited from CL 121938.
+				run = false
+			}
+			return run
+		},
+		numTryTestHelpers: 3,
+		env: []string{
+			"GOOS=js", "GOARCH=wasm", "GOHOSTOS=linux", "GOHOSTARCH=amd64",
+			"PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/workdir/go/misc/wasm",
+			"GO_DISABLE_OUTBOUND_NETWORK=1",
+		},
+	})
+	addBuilder(BuildConfig{
 		Name:              "openbsd-amd64-68",
 		HostType:          "host-openbsd-amd64-68",
 		distTestAdjust:    noTestDirAndNoReboot,
diff --git a/env/js-wasm-node18/Dockerfile b/env/js-wasm-node18/Dockerfile
new file mode 100644
index 0000000..a07b880
--- /dev/null
+++ b/env/js-wasm-node18/Dockerfile
@@ -0,0 +1,17 @@
+# Copyright 2022 The Go Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style
+# license that can be found in the LICENSE file.
+
+FROM {{REPO}}/linux-x86-sid:20221109
+LABEL maintainer="golang-dev@googlegroups.com"
+
+ENV DEBIAN_FRONTEND noninteractive
+
+# A copy of https://deb.nodesource.com/setup_18.x.
+COPY setup_18.x setup_18.x
+
+RUN bash setup_18.x && \
+    apt-get install -y nodejs && \
+    rm -rf setup_18.x /var/lib/apt/lists/*
+
+CMD ["/usr/local/bin/stage0"]
diff --git a/env/js-wasm-node18/Makefile b/env/js-wasm-node18/Makefile
new file mode 100644
index 0000000..7ebbb1f
--- /dev/null
+++ b/env/js-wasm-node18/Makefile
@@ -0,0 +1,26 @@
+# Copyright 2022 The Go Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style
+# license that can be found in the LICENSE file.
+
+IMAGE_NAME=$(shell basename $(CURDIR))
+PROD_REPO=gcr.io/symbolic-datum-552
+
+usage:
+	echo "Use prod or dev targets. For dev, specify your Docker repository with the REPO=foo argument." ; exit 1
+
+prod: Dockerfile
+	sed 's|{{REPO}}|'"$(PROD_REPO)"'|g' Dockerfile > Dockerfile.make
+	docker build -t $(PROD_REPO)/$(IMAGE_NAME):latest -f Dockerfile.make .
+
+pushprod: prod
+	docker push $(PROD_REPO)/$(IMAGE_NAME):latest
+	rm Dockerfile.make
+
+# You must provide a REPO=your-repo-name arg when you make
+# this target. REPO is the name of the Docker repository
+# that will be prefixed to the name of the image being built.
+dev: Dockerfile
+	sed 's|{{REPO}}|'"$(REPO)"'|g' Dockerfile > Dockerfile.make
+	docker build -t $(REPO)/$(IMAGE_NAME):latest -f Dockerfile.make .
+	docker push $(REPO)/$(IMAGE_NAME):latest
+	rm Dockerfile.make
diff --git a/env/js-wasm-node18/setup_18.x b/env/js-wasm-node18/setup_18.x
new file mode 100644
index 0000000..50dd64d
--- /dev/null
+++ b/env/js-wasm-node18/setup_18.x
@@ -0,0 +1,367 @@
+#!/bin/bash
+
+# Discussion, issues and change requests at:
+#   https://github.com/nodesource/distributions
+#
+# Script to install the NodeSource Node.js 18.x repo onto a
+# Debian or Ubuntu system.
+#
+# Run as root or insert `sudo -E` before `bash`:
+#
+# curl -sL https://deb.nodesource.com/setup_18.x | bash -
+#   or
+# wget -qO- https://deb.nodesource.com/setup_18.x | bash -
+#
+# CONTRIBUTIONS TO THIS SCRIPT
+#
+# This script is built from a template in
+# https://github.com/nodesource/distributions/tree/master/deb/src
+# please don't submit pull requests against the built scripts.
+#
+
+
+export DEBIAN_FRONTEND=noninteractive
+SCRSUFFIX="_18.x"
+NODENAME="Node.js 18.x"
+NODEREPO="node_18.x"
+NODEPKG="nodejs"
+
+print_status() {
+    echo
+    echo "## $1"
+    echo
+}
+
+if test -t 1; then # if terminal
+    ncolors=$(which tput > /dev/null && tput colors) # supports color
+    if test -n "$ncolors" && test $ncolors -ge 8; then
+        termcols=$(tput cols)
+        bold="$(tput bold)"
+        underline="$(tput smul)"
+        standout="$(tput smso)"
+        normal="$(tput sgr0)"
+        black="$(tput setaf 0)"
+        red="$(tput setaf 1)"
+        green="$(tput setaf 2)"
+        yellow="$(tput setaf 3)"
+        blue="$(tput setaf 4)"
+        magenta="$(tput setaf 5)"
+        cyan="$(tput setaf 6)"
+        white="$(tput setaf 7)"
+    fi
+fi
+
+print_bold() {
+    title="$1"
+    text="$2"
+
+    echo
+    echo "${red}================================================================================${normal}"
+    echo "${red}================================================================================${normal}"
+    echo
+    echo -e "  ${bold}${yellow}${title}${normal}"
+    echo
+    echo -en "  ${text}"
+    echo
+    echo "${red}================================================================================${normal}"
+    echo "${red}================================================================================${normal}"
+}
+
+bail() {
+    echo 'Error executing command, exiting'
+    exit 1
+}
+
+exec_cmd_nobail() {
+    echo "+ $1"
+    bash -c "$1"
+}
+
+exec_cmd() {
+    exec_cmd_nobail "$1" || bail
+}
+
+node_deprecation_warning() {
+    if [[ "X${NODENAME}" == "Xio.js 1.x" ||
+          "X${NODENAME}" == "Xio.js 2.x" ||
+          "X${NODENAME}" == "Xio.js 3.x" ||
+          "X${NODENAME}" == "XNode.js 0.10" ||
+          "X${NODENAME}" == "XNode.js 0.12" ||
+          "X${NODENAME}" == "XNode.js 4.x LTS Argon" ||
+          "X${NODENAME}" == "XNode.js 5.x" ||
+          "X${NODENAME}" == "XNode.js 6.x LTS Boron" ||
+          "X${NODENAME}" == "XNode.js 7.x" ||
+          "X${NODENAME}" == "XNode.js 8.x LTS Carbon" ||
+          "X${NODENAME}" == "XNode.js 9.x" ||
+          "X${NODENAME}" == "XNode.js 10.x" ||
+          "X${NODENAME}" == "XNode.js 11.x" || 
+          "X${NODENAME}" == "XNode.js 12.x" ||
+          "X${NODENAME}" == "XNode.js 13.x" ||
+          "X${NODENAME}" == "XNode.js 15.x" ||
+          "X${NODENAME}" == "XNode.js 17.x" ]]; then
+
+        print_bold \
+"                            DEPRECATION WARNING                            " "\
+${bold}${NODENAME} is no longer actively supported!${normal}
+
+  ${bold}You will not receive security or critical stability updates${normal} for this version.
+
+  You should migrate to a supported version of Node.js as soon as possible.
+  Use the installation script that corresponds to the version of Node.js you
+  wish to install. e.g.
+
+   * ${green}https://deb.nodesource.com/setup_14.x — Node.js 14 \"Fermium\"${normal}
+   * ${green}https://deb.nodesource.com/setup_16.x — Node.js 16 \"Gallium\"${normal}
+   * ${green}https://deb.nodesource.com/setup_18.x — Node.js 18 LTS \"Hydrogen\"${normal} (recommended)
+   * ${green}https://deb.nodesource.com/setup_19.x — Node.js 19 \"Nineteen\"${normal} (current)
+
+  Please see ${bold}https://github.com/nodejs/Release${normal} for details about which
+  version may be appropriate for you.
+
+  The ${bold}NodeSource${normal} Node.js distributions repository contains
+  information both about supported versions of Node.js and supported Linux
+  distributions. To learn more about usage, see the repository:
+    ${bold}https://github.com/nodesource/distributions${normal}
+"
+        echo
+        echo "Continuing in 20 seconds ..."
+        echo
+        sleep 20
+    fi
+}
+
+script_deprecation_warning() {
+    if [ "X${SCRSUFFIX}" == "X" ]; then
+        print_bold \
+"                         SCRIPT DEPRECATION WARNING                         " "\
+This script, located at ${bold}https://deb.nodesource.com/setup${normal}, used to
+  install Node.js 0.10, is deprecated and will eventually be made inactive.
+
+  You should use the script that corresponds to the version of Node.js you
+  wish to install. e.g.
+
+   * ${green}https://deb.nodesource.com/setup_14.x — Node.js 14 \"Fermium\"${normal}
+   * ${green}https://deb.nodesource.com/setup_16.x — Node.js 16 \"Gallium\"${normal}
+   * ${green}https://deb.nodesource.com/setup_18.x — Node.js 18 LTS \"Hydrogen\"${normal} (recommended)
+   * ${green}https://deb.nodesource.com/setup_19.x — Node.js 19 \"Nineteen\"${normal} (current)
+
+  Please see ${bold}https://github.com/nodejs/Release${normal} for details about which
+  version may be appropriate for you.
+
+  The ${bold}NodeSource${normal} Node.js Linux distributions GitHub repository contains
+  information about which versions of Node.js and which Linux distributions
+  are supported and how to use the install scripts.
+    ${bold}https://github.com/nodesource/distributions${normal}
+"
+
+        echo
+        echo "Continuing in 20 seconds (press Ctrl-C to abort) ..."
+        echo
+        sleep 20
+    fi
+}
+
+setup() {
+
+script_deprecation_warning
+node_deprecation_warning
+
+print_status "Installing the NodeSource ${NODENAME} repo..."
+
+if $(uname -m | grep -Eq ^armv6); then
+    print_status "You appear to be running on ARMv6 hardware. Unfortunately this is not currently supported by the NodeSource Linux distributions. Please use the 'linux-armv6l' binary tarballs available directly from nodejs.org for Node.js 4 and later."
+    exit 1
+fi
+
+PRE_INSTALL_PKGS=""
+
+# Check that HTTPS transport is available to APT
+# (Check snaked from: https://get.docker.io/ubuntu/)
+
+if [ ! -e /usr/lib/apt/methods/https ]; then
+    PRE_INSTALL_PKGS="${PRE_INSTALL_PKGS} apt-transport-https"
+fi
+
+if [ ! -x /usr/bin/lsb_release ]; then
+    PRE_INSTALL_PKGS="${PRE_INSTALL_PKGS} lsb-release"
+fi
+
+if [ ! -x /usr/bin/curl ] && [ ! -x /usr/bin/wget ]; then
+    PRE_INSTALL_PKGS="${PRE_INSTALL_PKGS} curl"
+fi
+
+# Used by apt-key to add new keys
+
+if [ ! -x /usr/bin/gpg ]; then
+    PRE_INSTALL_PKGS="${PRE_INSTALL_PKGS} gnupg"
+fi
+
+# Populating Cache
+print_status "Populating apt-get cache..."
+exec_cmd 'apt-get update'
+
+if [ "X${PRE_INSTALL_PKGS}" != "X" ]; then
+    print_status "Installing packages required for setup:${PRE_INSTALL_PKGS}..."
+    # This next command needs to be redirected to /dev/null or the script will bork
+    # in some environments
+    exec_cmd "apt-get install -y${PRE_INSTALL_PKGS} > /dev/null 2>&1"
+fi
+
+IS_PRERELEASE=$(lsb_release -d | grep 'Ubuntu .*development' >& /dev/null; echo $?)
+if [[ $IS_PRERELEASE -eq 0 ]]; then
+    print_status "Your distribution, identified as \"$(lsb_release -d -s)\", is a pre-release version of Ubuntu. NodeSource does not maintain official support for Ubuntu versions until they are formally released. You can try using the manual installation instructions available at https://github.com/nodesource/distributions and use the latest supported Ubuntu version name as the distribution identifier, although this is not guaranteed to work."
+    exit 1
+fi
+
+DISTRO=$(lsb_release -c -s)
+
+check_alt() {
+    if [ "X${DISTRO}" == "X${2}" ]; then
+        echo
+        echo "## You seem to be using ${1} version ${DISTRO}."
+        echo "## This maps to ${3} \"${4}\"... Adjusting for you..."
+        DISTRO="${4}"
+    fi
+}
+
+check_alt "Astra Linux"    "orel"            "Debian"        "stretch"
+check_alt "BOSS"           "anokha"          "Debian"        "wheezy"
+check_alt "BOSS"           "anoop"           "Debian"        "jessie"
+check_alt "BOSS"           "drishti"         "Debian"        "stretch"
+check_alt "BOSS"           "unnati"          "Debian"        "buster"
+check_alt "BOSS"           "urja"            "Debian"        "bullseye"
+check_alt "bunsenlabs"     "bunsen-hydrogen" "Debian"        "jessie"
+check_alt "bunsenlabs"     "helium"          "Debian"        "stretch"
+check_alt "bunsenlabs"     "lithium"         "Debian"        "buster"
+check_alt "Devuan"         "jessie"          "Debian"        "jessie"
+check_alt "Devuan"         "ascii"           "Debian"        "stretch"
+check_alt "Devuan"         "beowulf"         "Debian"        "buster"
+check_alt "Devuan"         "chimaera"        "Debian"        "bullseye"
+check_alt "Devuan"         "ceres"           "Debian"        "sid"
+check_alt "Deepin"         "panda"           "Debian"        "sid"
+check_alt "Deepin"         "unstable"        "Debian"        "sid"
+check_alt "Deepin"         "stable"          "Debian"        "buster"
+check_alt "Deepin"         "apricot"         "Debian"        "buster"
+check_alt "elementaryOS"   "luna"            "Ubuntu"        "precise"
+check_alt "elementaryOS"   "freya"           "Ubuntu"        "trusty"
+check_alt "elementaryOS"   "loki"            "Ubuntu"        "xenial"
+check_alt "elementaryOS"   "juno"            "Ubuntu"        "bionic"
+check_alt "elementaryOS"   "hera"            "Ubuntu"        "bionic"
+check_alt "elementaryOS"   "odin"            "Ubuntu"        "focal"
+check_alt "elementaryOS"   "jolnir"          "Ubuntu"        "focal"
+check_alt "Kali"           "sana"            "Debian"        "jessie"
+check_alt "Kali"           "kali-rolling"    "Debian"        "bullseye"
+check_alt "Linux Mint"     "maya"            "Ubuntu"        "precise"
+check_alt "Linux Mint"     "qiana"           "Ubuntu"        "trusty"
+check_alt "Linux Mint"     "rafaela"         "Ubuntu"        "trusty"
+check_alt "Linux Mint"     "rebecca"         "Ubuntu"        "trusty"
+check_alt "Linux Mint"     "rosa"            "Ubuntu"        "trusty"
+check_alt "Linux Mint"     "sarah"           "Ubuntu"        "xenial"
+check_alt "Linux Mint"     "serena"          "Ubuntu"        "xenial"
+check_alt "Linux Mint"     "sonya"           "Ubuntu"        "xenial"
+check_alt "Linux Mint"     "sylvia"          "Ubuntu"        "xenial"
+check_alt "Linux Mint"     "tara"            "Ubuntu"        "bionic"
+check_alt "Linux Mint"     "tessa"           "Ubuntu"        "bionic"
+check_alt "Linux Mint"     "tina"            "Ubuntu"        "bionic"
+check_alt "Linux Mint"     "tricia"          "Ubuntu"        "bionic"
+check_alt "Linux Mint"     "ulyana"          "Ubuntu"        "focal"
+check_alt "Linux Mint"     "ulyssa"          "Ubuntu"        "focal"
+check_alt "Linux Mint"     "uma"             "Ubuntu"        "focal"
+check_alt "Linux Mint"     "una"             "Ubuntu"        "focal"
+check_alt "Linux Mint"     "vanessa"         "Ubuntu"        "jammy"
+check_alt "Liquid Lemur"   "lemur-3"         "Debian"        "stretch"
+check_alt "LMDE"           "betsy"           "Debian"        "jessie"
+check_alt "LMDE"           "cindy"           "Debian"        "stretch"
+check_alt "LMDE"           "debbie"          "Debian"        "buster"
+check_alt "LMDE"           "elsie"           "Debian"        "bullseye"
+check_alt "MX Linux 17"    "Horizon"         "Debian"        "stretch"
+check_alt "MX Linux 18"    "Continuum"       "Debian"        "stretch"
+check_alt "MX Linux 19"    "patito feo"      "Debian"        "buster"
+check_alt "MX Linux 21"    "wildflower"      "Debian"        "bullseye"
+check_alt "Pardus"         "onyedi"          "Debian"        "stretch"
+check_alt "Parrot"         "ara"             "Debian"        "bullseye"
+check_alt "PureOS"         "green"           "Debian"        "sid"
+check_alt "PureOS"         "amber"           "Debian"        "buster"
+check_alt "PureOS"         "byzantium"       "Debian"        "bullseye"
+check_alt "SolydXK"        "solydxk-9"       "Debian"        "stretch"
+check_alt "Sparky Linux"   "Tyche"           "Debian"        "stretch"
+check_alt "Sparky Linux"   "Nibiru"          "Debian"        "buster"
+check_alt "Sparky Linux"   "Po-Tolo"         "Debian"        "bullseye"
+check_alt "Tanglu"         "chromodoris"     "Debian"        "jessie"
+check_alt "Trisquel"       "toutatis"        "Ubuntu"        "precise"
+check_alt "Trisquel"       "belenos"         "Ubuntu"        "trusty"
+check_alt "Trisquel"       "flidas"          "Ubuntu"        "xenial"
+check_alt "Trisquel"       "etiona"          "Ubuntu"        "bionic"
+check_alt "Ubilinux"       "dolcetto"        "Debian"        "stretch"
+check_alt "Uruk GNU/Linux" "lugalbanda"      "Ubuntu"        "xenial"
+
+if [ "X${DISTRO}" == "Xdebian" ]; then
+  print_status "Unknown Debian-based distribution, checking /etc/debian_version..."
+  NEWDISTRO=$([ -e /etc/debian_version ] && cut -d/ -f1 < /etc/debian_version)
+  if [ "X${NEWDISTRO}" == "X" ]; then
+    print_status "Could not determine distribution from /etc/debian_version..."
+  else
+    DISTRO=$NEWDISTRO
+    print_status "Found \"${DISTRO}\" in /etc/debian_version..."
+  fi
+fi
+
+print_status "Confirming \"${DISTRO}\" is supported..."
+
+if [ -x /usr/bin/curl ]; then
+    exec_cmd_nobail "curl -sLf -o /dev/null 'https://deb.nodesource.com/${NODEREPO}/dists/${DISTRO}/Release'"
+    RC=$?
+else
+    exec_cmd_nobail "wget -qO /dev/null -o /dev/null 'https://deb.nodesource.com/${NODEREPO}/dists/${DISTRO}/Release'"
+    RC=$?
+fi
+
+if [[ $RC != 0 ]]; then
+    print_status "Your distribution, identified as \"${DISTRO}\", is not currently supported, please contact NodeSource at https://github.com/nodesource/distributions/issues if you think this is incorrect or would like your distribution to be considered for support"
+    exit 1
+fi
+
+if [ -f "/etc/apt/sources.list.d/chris-lea-node_js-$DISTRO.list" ]; then
+    print_status 'Removing Launchpad PPA Repository for NodeJS...'
+
+    exec_cmd_nobail 'add-apt-repository -y -r ppa:chris-lea/node.js'
+    exec_cmd "rm -f /etc/apt/sources.list.d/chris-lea-node_js-${DISTRO}.list"
+fi
+
+print_status 'Adding the NodeSource signing key to your keyring...'
+keyring='/usr/share/keyrings'
+node_key_url="https://deb.nodesource.com/gpgkey/nodesource.gpg.key"
+local_node_key="$keyring/nodesource.gpg"
+
+if [ -x /usr/bin/curl ]; then
+    exec_cmd "curl -s $node_key_url | gpg --dearmor | tee $local_node_key >/dev/null"
+else
+    exec_cmd "wget -q -O - $node_key_url | gpg --dearmor | tee $local_node_key >/dev/null"
+fi
+
+print_status "Creating apt sources list file for the NodeSource ${NODENAME} repo..."
+
+exec_cmd "echo 'deb [signed-by=$local_node_key] https://deb.nodesource.com/${NODEREPO} ${DISTRO} main' > /etc/apt/sources.list.d/nodesource.list"
+exec_cmd "echo 'deb-src [signed-by=$local_node_key] https://deb.nodesource.com/${NODEREPO} ${DISTRO} main' >> /etc/apt/sources.list.d/nodesource.list"
+
+print_status 'Running `apt-get update` for you...'
+
+exec_cmd 'apt-get update'
+
+yarn_site='https://dl.yarnpkg.com/debian'
+yarn_key_url="$yarn_site/pubkey.gpg"
+local_yarn_key="$keyring/yarnkey.gpg"
+
+print_status """Run \`${bold}sudo apt-get install -y ${NODEPKG}${normal}\` to install ${NODENAME} and npm
+## You may also need development tools to build native addons:
+     sudo apt-get install gcc g++ make
+## To install the Yarn package manager, run:
+     curl -sL $yarn_key_url | gpg --dearmor | sudo tee $local_yarn_key >/dev/null
+     echo \"deb [signed-by=$local_yarn_key] $yarn_site stable main\" | sudo tee /etc/apt/sources.list.d/yarn.list
+     sudo apt-get update && sudo apt-get install yarn
+"""
+
+}
+
+## Defer setup until we have the complete script
+setup