dashboard/builders.go - build - Git at Google

 // Copyright 2015 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.

 // Package dashboard contains shared configuration and logic used by various
 // pieces of the Go continuous build system.
 package dashboard

 import "strings"

 // Builders are the different build configurations.
 // The keys are like "darwin-amd64" or "linux-386-387".
 // This map should not be modified by other packages.
 var Builders = map[string]BuildConfig{}

 // A BuildConfig describes how to run a VM-based builder.
 type BuildConfig struct {
 	// Name is the unique name of the builder, in the form of
 	// "darwin-386" or "linux-amd64-race".
 	Name string

 	VMImage     string // e.g. "openbsd-amd64-56"
 	machineType string // optional GCE instance type
 	Go14URL     string // URL to built Go 1.4 tar.gz
 	buildletURL string // optional override buildlet URL

 	RegularDisk bool // if true, use spinning disk instead of SSD

 	env []string // extra environment ("key=value") pairs
 }

 func (c *BuildConfig) Env() []string { return append([]string(nil), c.env...) }

 func (c *BuildConfig) GOOS() string { return c.Name[:strings.Index(c.Name, "-")] }

 func (c *BuildConfig) GOARCH() string {
 	arch := c.Name[strings.Index(c.Name, "-")+1:]
 	i := strings.Index(arch, "-")
 	if i == -1 {
 		return arch
 	}
 	return arch[:i]
 }

 // BuildletBinaryURL returns the public URL of this builder's buildlet.
 func (c *BuildConfig) BuildletBinaryURL() string {
 	if c.buildletURL != "" {
 		return c.buildletURL
 	}
 	return "http://storage.googleapis.com/go-builder-data/buildlet." + c.GOOS() + "-" + c.GOARCH()
 }

 // AllScript returns the relative path to the operating system's script to
 // do the build and run its standard set of tests.
 // Example values are "src/all.bash", "src/all.bat", "src/all.rc".
 func (c *BuildConfig) AllScript() string {
 	if strings.HasSuffix(c.Name, "-race") {
 		if strings.HasPrefix(c.Name, "windows-") {
 			return "src/race.bat"
 		}
 		return "src/race.bash"
 	}
 	if strings.HasPrefix(c.Name, "windows-") {
 		return "src/all.bat"
 	}
 	if strings.HasPrefix(c.Name, "plan9-") {
 		return "src/all.rc"
 	}
 	if strings.HasPrefix(c.Name, "nacl-") {
 		return "src/nacltest.bash"
 	}
 	return "src/all.bash"
 }

 // MakeScript returns the relative path to the operating system's script to
 // do the build.
 // Example values are "src/make.bash", "src/make.bat", "src/make.rc".
 func (c *BuildConfig) MakeScript() string {
 	if strings.HasPrefix(c.Name, "windows-") {
 		return "src/make.bat"
 	}
 	if strings.HasPrefix(c.Name, "plan9-") {
 		return "src/make.rc"
 	}
 	return "src/make.bash"
 }

 // GorootFinal returns the default install location for
 // releases for this platform.
 func (c *BuildConfig) GorootFinal() string {
 	if strings.HasPrefix(c.Name, "windows-") {
 		return "c:\\go"
 	}
 	return "/usr/local/go"
 }

 // MachineType returns the GCE machine type to use for this builder.
 func (c *BuildConfig) MachineType() string {
 	if v := c.machineType; v != "" {
 		return v
 	}
 	return "n1-highcpu-2"
 }

 func init() {
 	addBuilder(BuildConfig{
 		Name:        "freebsd-amd64-gce93",
 		VMImage:     "freebsd-amd64-gce93",
 		machineType: "n1-highcpu-2",
 		Go14URL:     "https://storage.googleapis.com/go-builder-data/go1.4-freebsd-amd64.tar.gz",
 	})
 	addBuilder(BuildConfig{
 		Name:        "freebsd-amd64-gce101",
 		VMImage:     "freebsd-amd64-gce101",
 		machineType: "n1-highcpu-2",
 		Go14URL:     "https://storage.googleapis.com/go-builder-data/go1.4-freebsd-amd64.tar.gz",
 		env:         []string{"CC=clang"},
 	})
 	addBuilder(BuildConfig{
 		Name:        "freebsd-amd64-race",
 		VMImage:     "freebsd-amd64-gce101",
 		machineType: "n1-highcpu-4",
 		Go14URL:     "https://storage.googleapis.com/go-builder-data/go1.4-freebsd-amd64.tar.gz",
 		env:         []string{"CC=clang"},
 	})
 	addBuilder(BuildConfig{
 		Name:        "freebsd-386-gce101",
 		VMImage:     "freebsd-amd64-gce101",
 		machineType: "n1-highcpu-2",
 		buildletURL: "http://storage.googleapis.com/go-builder-data/buildlet.freebsd-amd64",
 		Go14URL:     "https://storage.googleapis.com/go-builder-data/go1.4-freebsd-amd64.tar.gz",
 		// TODO(bradfitz): setting GOHOSTARCH=386 should work
 		// to eliminate some unnecessary work (it works on
 		// Linux), but fails on FreeBSD with:
 		//   ##### ../misc/cgo/testso
 		//   Shared object "libcgosotest.so" not found, required by "main"
 		// Maybe this is a clang thing? We'll see when we do linux clang too.
 		env: []string{"GOARCH=386", "CC=clang"},
 	})
 	addBuilder(BuildConfig{
 		Name:        "linux-386",
 		VMImage:     "linux-buildlet-std",
 		buildletURL: "http://storage.googleapis.com/go-builder-data/buildlet.linux-amd64",
 		env:         []string{"GOROOT_BOOTSTRAP=/go1.4", "GOARCH=386", "GOHOSTARCH=386"},
 	})
 	addBuilder(BuildConfig{
 		Name:        "linux-386-387",
 		VMImage:     "linux-buildlet-std",
 		buildletURL: "http://storage.googleapis.com/go-builder-data/buildlet.linux-amd64",
 		env:         []string{"GOROOT_BOOTSTRAP=/go1.4", "GOARCH=386", "GOHOSTARCH=386", "GO386=387"},
 	})
 	addBuilder(BuildConfig{
 		Name:    "linux-amd64",
 		VMImage: "linux-buildlet-std",
 		env:     []string{"GOROOT_BOOTSTRAP=/go1.4"},
 	})
 	addBuilder(BuildConfig{
 		Name:    "linux-amd64-nocgo",
 		VMImage: "linux-buildlet-std",
 		env: []string{
 			"GOROOT_BOOTSTRAP=/go1.4",
 			"CGO_ENABLED=0",
 			// This USER=root was required for Docker-based builds but probably isn't required
 			// in the VM anymore, since the buildlet probably already has this in its environment.
 			// (It was required because without cgo, it couldn't find the username)
 			"USER=root",
 		},
 	})
 	addBuilder(BuildConfig{
 		Name:    "linux-amd64-noopt",
 		VMImage: "linux-buildlet-std",
 		env:     []string{"GOROOT_BOOTSTRAP=/go1.4", "GO_GCFLAGS=-N -l"},
 	})
 	addBuilder(BuildConfig{
 		Name:        "linux-amd64-race",
 		VMImage:     "linux-buildlet-std",
 		machineType: "n1-highcpu-4",
 		env:         []string{"GOROOT_BOOTSTRAP=/go1.4"},
 	})
 	addBuilder(BuildConfig{
 		Name:        "linux-386-clang",
 		VMImage:     "linux-buildlet-clang",
 		buildletURL: "http://storage.googleapis.com/go-builder-data/buildlet.linux-amd64",
 		env:         []string{"GOROOT_BOOTSTRAP=/go1.4", "CC=/usr/bin/clang", "GOHOSTARCH=386"},
 	})
 	addBuilder(BuildConfig{
 		Name:    "linux-amd64-clang",
 		VMImage: "linux-buildlet-clang",
 		env:     []string{"GOROOT_BOOTSTRAP=/go1.4", "CC=/usr/bin/clang"},
 	})
 	addBuilder(BuildConfig{
 		Name:        "linux-386-sid",
 		VMImage:     "linux-buildlet-sid",
 		buildletURL: "http://storage.googleapis.com/go-builder-data/buildlet.linux-amd64",
 		env:         []string{"GOROOT_BOOTSTRAP=/go1.4", "GOHOSTARCH=386"},
 	})
 	addBuilder(BuildConfig{
 		Name:    "linux-amd64-sid",
 		VMImage: "linux-buildlet-sid",
 		env:     []string{"GOROOT_BOOTSTRAP=/go1.4"},
 	})
 	addBuilder(BuildConfig{
 		Name:    "linux-arm-qemu",
 		VMImage: "linux-buildlet-arm",
 		env:     []string{"GOROOT_BOOTSTRAP=/go1.4", "IN_QEMU=1"},
 	})
 	addBuilder(BuildConfig{
 		Name:        "nacl-386",
 		VMImage:     "linux-buildlet-nacl",
 		buildletURL: "http://storage.googleapis.com/go-builder-data/buildlet.linux-amd64",
 		env:         []string{"GOROOT_BOOTSTRAP=/go1.4", "GOOS=nacl", "GOARCH=386", "GOHOSTOS=linux", "GOHOSTARCH=amd64"},
 	})
 	addBuilder(BuildConfig{
 		Name:        "nacl-amd64p32",
 		VMImage:     "linux-buildlet-nacl",
 		buildletURL: "http://storage.googleapis.com/go-builder-data/buildlet.linux-amd64",
 		env:         []string{"GOROOT_BOOTSTRAP=/go1.4", "GOOS=nacl", "GOARCH=amd64p32", "GOHOSTOS=linux", "GOHOSTARCH=amd64"},
 	})
 	addBuilder(BuildConfig{
 		Name:        "openbsd-amd64-gce56",
 		VMImage:     "openbsd-amd64-56",
 		machineType: "n1-highcpu-2",
 		Go14URL:     "https://storage.googleapis.com/go-builder-data/go1.4-openbsd-amd64.tar.gz",
 	})
 	addBuilder(BuildConfig{
 		Name:        "openbsd-386-gce56",
 		VMImage:     "openbsd-386-56",
 		machineType: "n1-highcpu-2",
 		Go14URL:     "https://storage.googleapis.com/go-builder-data/go1.4-openbsd-386.tar.gz",
 	})
 	addBuilder(BuildConfig{
 		Name:    "plan9-386-gcepartial",
 		VMImage: "plan9-386-v2",
 		Go14URL: "https://storage.googleapis.com/go-builder-data/go1.4-plan9-386.tar.gz",
 		// It's named "partial" because the buildlet sets
 		// GOTESTONLY=std to stop after the "go test std"
 		// tests because it's so slow otherwise.
 		env: []string{"GOTESTONLY=std"},

 		// We *were* using n1-standard-1 because Plan 9 can only
 		// reliably use a single CPU. Using 2 or 4 and we see
 		// test failures. See:
 		//    https://golang.org/issue/8393
 		//    https://golang.org/issue/9491
 		// n1-standard-1 has 3.6 GB of memory which WAS (see below)
 		// overkill (userspace probably only sees 2GB anyway),
 		// but it's the cheapest option. And plenty to keep
 		// our ~250 MB of inputs+outputs in its ramfs.
 		//
 		// But the docs says "For the n1 series of machine
 		// types, a virtual CPU is implemented as a single
 		// hyperthread on a 2.6GHz Intel Sandy Bridge Xeon or
 		// Intel Ivy Bridge Xeon (or newer) processor. This
 		// means that the n1-standard-2 machine type will see
 		// a whole physical core."
 		//
 		// ... so we used n1-highcpu-2 (1.80 RAM, still
 		// plenty), just so we can get 1 whole core for the
 		// single-core Plan 9. It will see 2 virtual cores and
 		// only use 1, but we hope that 1 will be more powerful
 		// and we'll stop timing out on tests.
 		//
 		// But then with the toolchain conversion to Go and
 		// using ramfs, it turns out we need more memory
 		// anyway, so use n1-highcpu-4.
 		machineType: "n1-highcpu-4",
 	})
 	addBuilder(BuildConfig{
 		Name:        "windows-amd64-gce",
 		VMImage:     "windows-buildlet",
 		machineType: "n1-highcpu-2",
 		Go14URL:     "https://storage.googleapis.com/go-builder-data/go1.4-windows-amd64.tar.gz",
 		RegularDisk: true,
 		env:         []string{"GOARCH=amd64", "GOHOSTARCH=amd64"},
 	})
 	addBuilder(BuildConfig{
 		Name:        "windows-amd64-race",
 		VMImage:     "windows-buildlet",
 		machineType: "n1-highcpu-4",
 		Go14URL:     "https://storage.googleapis.com/go-builder-data/go1.4-windows-amd64.tar.gz",
 		RegularDisk: true,
 		env:         []string{"GOARCH=amd64", "GOHOSTARCH=amd64"},
 	})
 	addBuilder(BuildConfig{
 		Name:        "windows-386-gce",
 		VMImage:     "windows-buildlet",
 		machineType: "n1-highcpu-2",
 		buildletURL: "http://storage.googleapis.com/go-builder-data/buildlet.windows-amd64",
 		Go14URL:     "https://storage.googleapis.com/go-builder-data/go1.4-windows-386.tar.gz",
 		RegularDisk: true,
 		env:         []string{"GOARCH=386", "GOHOSTARCH=386"},
 	})
 }

 func addBuilder(c BuildConfig) {
 	if c.Name == "" {
 		panic("empty name")
 	}
 	if _, dup := Builders[c.Name]; dup {
 		panic("dup name")
 	}
 	if c.VMImage == "" {
 		panic("empty VMImage")
 	}
 	Builders[c.Name] = c
 }
	// Copyright 2015 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.

	// Package dashboard contains shared configuration and logic used by various
	// pieces of the Go continuous build system.
	package dashboard

	import "strings"

	// Builders are the different build configurations.
	// The keys are like "darwin-amd64" or "linux-386-387".
	// This map should not be modified by other packages.
	var Builders = map[string]BuildConfig{}

	// A BuildConfig describes how to run a VM-based builder.
	type BuildConfig struct {
	// Name is the unique name of the builder, in the form of
	// "darwin-386" or "linux-amd64-race".
	Name string

	VMImage string // e.g. "openbsd-amd64-56"
	machineType string // optional GCE instance type
	Go14URL string // URL to built Go 1.4 tar.gz
	buildletURL string // optional override buildlet URL

	RegularDisk bool // if true, use spinning disk instead of SSD

	env []string // extra environment ("key=value") pairs
	}

	func (c *BuildConfig) Env() []string { return append([]string(nil), c.env...) }

	func (c *BuildConfig) GOOS() string { return c.Name[:strings.Index(c.Name, "-")] }

	func (c *BuildConfig) GOARCH() string {
	arch := c.Name[strings.Index(c.Name, "-")+1:]
	i := strings.Index(arch, "-")
	if i == -1 {
	return arch
	}
	return arch[:i]
	}

	// BuildletBinaryURL returns the public URL of this builder's buildlet.
	func (c *BuildConfig) BuildletBinaryURL() string {
	if c.buildletURL != "" {
	return c.buildletURL
	}
	return "http://storage.googleapis.com/go-builder-data/buildlet." + c.GOOS() + "-" + c.GOARCH()
	}

	// AllScript returns the relative path to the operating system's script to
	// do the build and run its standard set of tests.
	// Example values are "src/all.bash", "src/all.bat", "src/all.rc".
	func (c *BuildConfig) AllScript() string {
	if strings.HasSuffix(c.Name, "-race") {
	if strings.HasPrefix(c.Name, "windows-") {
	return "src/race.bat"
	}
	return "src/race.bash"
	}
	if strings.HasPrefix(c.Name, "windows-") {
	return "src/all.bat"
	}
	if strings.HasPrefix(c.Name, "plan9-") {
	return "src/all.rc"
	}
	if strings.HasPrefix(c.Name, "nacl-") {
	return "src/nacltest.bash"
	}
	return "src/all.bash"
	}

	// MakeScript returns the relative path to the operating system's script to
	// do the build.
	// Example values are "src/make.bash", "src/make.bat", "src/make.rc".
	func (c *BuildConfig) MakeScript() string {
	if strings.HasPrefix(c.Name, "windows-") {
	return "src/make.bat"
	}
	if strings.HasPrefix(c.Name, "plan9-") {
	return "src/make.rc"
	}
	return "src/make.bash"
	}

	// GorootFinal returns the default install location for
	// releases for this platform.
	func (c *BuildConfig) GorootFinal() string {
	if strings.HasPrefix(c.Name, "windows-") {
	return "c:\\go"
	}
	return "/usr/local/go"
	}

	// MachineType returns the GCE machine type to use for this builder.
	func (c *BuildConfig) MachineType() string {
	if v := c.machineType; v != "" {
	return v
	}
	return "n1-highcpu-2"
	}

	func init() {
	addBuilder(BuildConfig{
	Name: "freebsd-amd64-gce93",
	VMImage: "freebsd-amd64-gce93",
	machineType: "n1-highcpu-2",
	Go14URL: "https://storage.googleapis.com/go-builder-data/go1.4-freebsd-amd64.tar.gz",
	})
	addBuilder(BuildConfig{
	Name: "freebsd-amd64-gce101",
	VMImage: "freebsd-amd64-gce101",
	machineType: "n1-highcpu-2",
	Go14URL: "https://storage.googleapis.com/go-builder-data/go1.4-freebsd-amd64.tar.gz",
	env: []string{"CC=clang"},
	})
	addBuilder(BuildConfig{
	Name: "freebsd-amd64-race",
	VMImage: "freebsd-amd64-gce101",
	machineType: "n1-highcpu-4",
	Go14URL: "https://storage.googleapis.com/go-builder-data/go1.4-freebsd-amd64.tar.gz",
	env: []string{"CC=clang"},
	})
	addBuilder(BuildConfig{
	Name: "freebsd-386-gce101",
	VMImage: "freebsd-amd64-gce101",
	machineType: "n1-highcpu-2",
	buildletURL: "http://storage.googleapis.com/go-builder-data/buildlet.freebsd-amd64",
	Go14URL: "https://storage.googleapis.com/go-builder-data/go1.4-freebsd-amd64.tar.gz",
	// TODO(bradfitz): setting GOHOSTARCH=386 should work
	// to eliminate some unnecessary work (it works on
	// Linux), but fails on FreeBSD with:
	// ##### ../misc/cgo/testso
	// Shared object "libcgosotest.so" not found, required by "main"
	// Maybe this is a clang thing? We'll see when we do linux clang too.
	env: []string{"GOARCH=386", "CC=clang"},
	})
	addBuilder(BuildConfig{
	Name: "linux-386",
	VMImage: "linux-buildlet-std",
	buildletURL: "http://storage.googleapis.com/go-builder-data/buildlet.linux-amd64",
	env: []string{"GOROOT_BOOTSTRAP=/go1.4", "GOARCH=386", "GOHOSTARCH=386"},
	})
	addBuilder(BuildConfig{
	Name: "linux-386-387",
	VMImage: "linux-buildlet-std",
	buildletURL: "http://storage.googleapis.com/go-builder-data/buildlet.linux-amd64",
	env: []string{"GOROOT_BOOTSTRAP=/go1.4", "GOARCH=386", "GOHOSTARCH=386", "GO386=387"},
	})
	addBuilder(BuildConfig{
	Name: "linux-amd64",
	VMImage: "linux-buildlet-std",
	env: []string{"GOROOT_BOOTSTRAP=/go1.4"},
	})
	addBuilder(BuildConfig{
	Name: "linux-amd64-nocgo",
	VMImage: "linux-buildlet-std",
	env: []string{
	"GOROOT_BOOTSTRAP=/go1.4",
	"CGO_ENABLED=0",
	// This USER=root was required for Docker-based builds but probably isn't required
	// in the VM anymore, since the buildlet probably already has this in its environment.
	// (It was required because without cgo, it couldn't find the username)
	"USER=root",
	},
	})
	addBuilder(BuildConfig{
	Name: "linux-amd64-noopt",
	VMImage: "linux-buildlet-std",
	env: []string{"GOROOT_BOOTSTRAP=/go1.4", "GO_GCFLAGS=-N -l"},
	})
	addBuilder(BuildConfig{
	Name: "linux-amd64-race",
	VMImage: "linux-buildlet-std",
	machineType: "n1-highcpu-4",
	env: []string{"GOROOT_BOOTSTRAP=/go1.4"},
	})
	addBuilder(BuildConfig{
	Name: "linux-386-clang",
	VMImage: "linux-buildlet-clang",
	buildletURL: "http://storage.googleapis.com/go-builder-data/buildlet.linux-amd64",
	env: []string{"GOROOT_BOOTSTRAP=/go1.4", "CC=/usr/bin/clang", "GOHOSTARCH=386"},
	})
	addBuilder(BuildConfig{
	Name: "linux-amd64-clang",
	VMImage: "linux-buildlet-clang",
	env: []string{"GOROOT_BOOTSTRAP=/go1.4", "CC=/usr/bin/clang"},
	})
	addBuilder(BuildConfig{
	Name: "linux-386-sid",
	VMImage: "linux-buildlet-sid",
	buildletURL: "http://storage.googleapis.com/go-builder-data/buildlet.linux-amd64",
	env: []string{"GOROOT_BOOTSTRAP=/go1.4", "GOHOSTARCH=386"},
	})
	addBuilder(BuildConfig{
	Name: "linux-amd64-sid",
	VMImage: "linux-buildlet-sid",
	env: []string{"GOROOT_BOOTSTRAP=/go1.4"},
	})
	addBuilder(BuildConfig{
	Name: "linux-arm-qemu",
	VMImage: "linux-buildlet-arm",
	env: []string{"GOROOT_BOOTSTRAP=/go1.4", "IN_QEMU=1"},
	})
	addBuilder(BuildConfig{
	Name: "nacl-386",
	VMImage: "linux-buildlet-nacl",
	buildletURL: "http://storage.googleapis.com/go-builder-data/buildlet.linux-amd64",
	env: []string{"GOROOT_BOOTSTRAP=/go1.4", "GOOS=nacl", "GOARCH=386", "GOHOSTOS=linux", "GOHOSTARCH=amd64"},
	})
	addBuilder(BuildConfig{
	Name: "nacl-amd64p32",
	VMImage: "linux-buildlet-nacl",
	buildletURL: "http://storage.googleapis.com/go-builder-data/buildlet.linux-amd64",
	env: []string{"GOROOT_BOOTSTRAP=/go1.4", "GOOS=nacl", "GOARCH=amd64p32", "GOHOSTOS=linux", "GOHOSTARCH=amd64"},
	})
	addBuilder(BuildConfig{
	Name: "openbsd-amd64-gce56",
	VMImage: "openbsd-amd64-56",
	machineType: "n1-highcpu-2",
	Go14URL: "https://storage.googleapis.com/go-builder-data/go1.4-openbsd-amd64.tar.gz",
	})
	addBuilder(BuildConfig{
	Name: "openbsd-386-gce56",
	VMImage: "openbsd-386-56",
	machineType: "n1-highcpu-2",
	Go14URL: "https://storage.googleapis.com/go-builder-data/go1.4-openbsd-386.tar.gz",
	})
	addBuilder(BuildConfig{
	Name: "plan9-386-gcepartial",
	VMImage: "plan9-386-v2",
	Go14URL: "https://storage.googleapis.com/go-builder-data/go1.4-plan9-386.tar.gz",
	// It's named "partial" because the buildlet sets
	// GOTESTONLY=std to stop after the "go test std"
	// tests because it's so slow otherwise.
	env: []string{"GOTESTONLY=std"},

	// We were using n1-standard-1 because Plan 9 can only
	// reliably use a single CPU. Using 2 or 4 and we see
	// test failures. See:
	// https://golang.org/issue/8393
	// https://golang.org/issue/9491
	// n1-standard-1 has 3.6 GB of memory which WAS (see below)
	// overkill (userspace probably only sees 2GB anyway),
	// but it's the cheapest option. And plenty to keep
	// our ~250 MB of inputs+outputs in its ramfs.
	//
	// But the docs says "For the n1 series of machine
	// types, a virtual CPU is implemented as a single
	// hyperthread on a 2.6GHz Intel Sandy Bridge Xeon or
	// Intel Ivy Bridge Xeon (or newer) processor. This
	// means that the n1-standard-2 machine type will see
	// a whole physical core."
	//
	// ... so we used n1-highcpu-2 (1.80 RAM, still
	// plenty), just so we can get 1 whole core for the
	// single-core Plan 9. It will see 2 virtual cores and
	// only use 1, but we hope that 1 will be more powerful
	// and we'll stop timing out on tests.
	//
	// But then with the toolchain conversion to Go and
	// using ramfs, it turns out we need more memory
	// anyway, so use n1-highcpu-4.
	machineType: "n1-highcpu-4",
	})
	addBuilder(BuildConfig{
	Name: "windows-amd64-gce",
	VMImage: "windows-buildlet",
	machineType: "n1-highcpu-2",
	Go14URL: "https://storage.googleapis.com/go-builder-data/go1.4-windows-amd64.tar.gz",
	RegularDisk: true,
	env: []string{"GOARCH=amd64", "GOHOSTARCH=amd64"},
	})
	addBuilder(BuildConfig{
	Name: "windows-amd64-race",
	VMImage: "windows-buildlet",
	machineType: "n1-highcpu-4",
	Go14URL: "https://storage.googleapis.com/go-builder-data/go1.4-windows-amd64.tar.gz",
	RegularDisk: true,
	env: []string{"GOARCH=amd64", "GOHOSTARCH=amd64"},
	})
	addBuilder(BuildConfig{
	Name: "windows-386-gce",
	VMImage: "windows-buildlet",
	machineType: "n1-highcpu-2",
	buildletURL: "http://storage.googleapis.com/go-builder-data/buildlet.windows-amd64",
	Go14URL: "https://storage.googleapis.com/go-builder-data/go1.4-windows-386.tar.gz",
	RegularDisk: true,
	env: []string{"GOARCH=386", "GOHOSTARCH=386"},
	})
	}

	func addBuilder(c BuildConfig) {
	if c.Name == "" {
	panic("empty name")
	}
	if _, dup := Builders[c.Name]; dup {
	panic("dup name")
	}
	if c.VMImage == "" {
	panic("empty VMImage")
	}
	Builders[c.Name] = c
	}