# go env -w rejects invalid GOTMPDIR values
! go env -w GOTMPDIR=x
stderr 'go: GOTMPDIR must be an absolute path'

# go env -w should accept absolute GOTMPDIR value
# and should not create it
[GOOS:windows] go env -w GOTMPDIR=$WORK\x\y\z
[!GOOS:windows] go env -w GOTMPDIR=$WORK/x/y/z
! exists $WORK/x/y/z
# we should be able to clear an env
go env -u GOTMPDIR
go env GOTMPDIR
stdout ^$

	GOGCCFLAGS
	GOHOSTARCH
	GOHOSTOS
	GOINSECURE
	GOMIPS
	GOMIPS64
	GOMODCACHE
	GONOPROXY
	GONOSUMDB
	GOOS
	GOPATH
	GOPPC64
	GOPRIVATE
	GOPROXY
	GORISCV64
	GOROOT
	GOSUMDB
	GOTMPDIR
	GOTOOLCHAIN
	GOTOOLDIR
	GOVCS
	GOWASM
	GOWORK
	GO_EXTLINK_ENABLED
	PKG_CONFIG

		{Name: "GOPROXY", Value: cfg.GOPROXY, Changed: cfg.GOPROXYChanged},
		{Name: "GOROOT", Value: cfg.GOROOT},
		{Name: "GOSUMDB", Value: cfg.GOSUMDB, Changed: cfg.GOSUMDBChanged},
		{Name: "GOTMPDIR", Value: cfg.Getenv("GOTMPDIR")},
		{Name: "GOTOOLCHAIN"},
		{Name: "GOTOOLDIR", Value: build.ToolDir},
		{Name: "GOVCS", Value: cfg.GOVCS},
		{Name: "GOVERSION", Value: runtime.Version()},

	xprintf(format, "GOHOSTOS", gohostos)
	xprintf(format, "GOOS", goos)
	xprintf(format, "GOPROXY", os.Getenv("GOPROXY"))
	xprintf(format, "GOROOT", goroot)
	xprintf(format, "GOTMPDIR", os.Getenv("GOTMPDIR"))
	xprintf(format, "GOTOOLDIR", tooldir)
	if goarch == "arm" {
		xprintf(format, "GOARM", goarm)
	}
	if goarch == "arm64" {
		xprintf(format, "GOARM64", goarm64)
	}

		b.WorkDir = workDir
	} else if cfg.BuildN {
		b.WorkDir = "$WORK"
	} else {
		if !buildInitStarted {
			panic("internal error: NewBuilder called before BuildInit")
		}
		tmp, err := os.MkdirTemp(cfg.Getenv("GOTMPDIR"), "go-build")
		if err != nil {
			base.Fatalf("go: creating work dir: %v", err)
		}
		if !filepath.IsAbs(tmp) {
			abs, err := filepath.Abs(tmp)
			if err != nil {
				os.RemoveAll(tmp)

		The name of checksum database to use and optionally its public key and
		URL. See https://golang.org/ref/mod#authenticating.
	GOTOOLCHAIN
		Controls which Go toolchain is used. See https://go.dev/doc/toolchain.
	GOTMPDIR
		The directory where the go command will write
		temporary source files, packages, and binaries.
	GOVCS
		Lists version control commands that may be used with matching servers.
		See 'go help vcs'.
	GOWORK

//		The name of checksum database to use and optionally its public key and
//		URL. See https://golang.org/ref/mod#authenticating.
//	GOTOOLCHAIN
//		Controls which Go toolchain is used. See https://go.dev/doc/toolchain.
//	GOTMPDIR
//		The directory where the go command will write
//		temporary source files, packages, and binaries.
//	GOVCS
//		Lists version control commands that may be used with matching servers.
//		See 'go help vcs'.