env GO111MODULE=off

# If GOTMPDIR is relative, 'go build' should derive an absolute $WORK directory.
cd $WORK
mkdir tmp
env GOTMPDIR=tmp
go build -work a
stderr 'WORK='$WORK

# Similarly if TMP/TMPDIR is relative.
env GOTMPDIR=
env TMP=tmp    # Windows
env TMPDIR=tmp # Unix
go build -work a
stderr 'WORK='$WORK

-- a/a.go --

# 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 $WORK/x/y/z
# we should be able to clear an env
go env -u GOTMPDIR
go env GOTMPDIR
stdout ^$

[!GOOS:windows] env GOCACHE=$WORK/gocache
[GOOS:windows] env GOCACHE=$WORK\gocache

# 'go build' should use GOTMPDIR if set.
[!GOOS:windows] env GOTMPDIR=$WORK/my-favorite-tmpdir
[GOOS:windows] env GOTMPDIR=$WORK\my-favorite-tmpdir
mkdir $GOTMPDIR
go build -x hello.go
stderr ^WORK=.*my-favorite-tmpdir

# Make GOTMPDIR a regular file. This prevents the creation of work directories,
# so we can check that certain commands don't create them.

	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

        GOOS="darwin"
        GOPATH="/Users/gopher/go"
        GOPRIVATE=""
        GOPROXY="https://proxy.golang.org,direct"
        GOROOT="/usr/local/go"
        GOSUMDB="sum.golang.org"
        GOTMPDIR=""
        GOTOOLDIR="/usr/local/go/pkg/tool/darwin_arm64"
        GOVCS=""
        GOVERSION="go1.20.7"
        GCCGO="gccgo"
        AR="ar"
        CC="clang"
        CXX="clang++"
        CGO_ENABLED="1"

		{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()},

	}
	return names
}

// xworkdir creates a new temporary directory to hold object files
// and returns the name of that directory.
func xworkdir() string {
	name, err := os.MkdirTemp(os.Getenv("GOTMPDIR"), "go-tool-dist-")
	if err != nil {
		fatalf("%v", err)
	}
	return name
}

// fatalf prints an error message to standard error and exits.
func fatalf(format string, args ...interface{}) {

	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