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>

dashboard/builders.go

@@ -285,10 +285,15 @@ var Hosts = map[string]*HostConfig{
 		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 @@ func init() {
 			}
 			return b
 		},
-
 		distTestAdjust: func(run bool, distTest string, isNormalTry bool) bool {
 			if isNormalTry {
 				if strings.Contains(distTest, "/internal/") ||
@@ -1978,6 +1982,37 @@ func init() {
 			"GO_DISABLE_OUTBOUND_NETWORK=1",
 		},
 	})
+	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",

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"]

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