if t == nil {
		t = new(timer)
		t.init(goroutineReady, gp)
		gp.timer = t
	}
	when := nanotime() + ns
	if when < 0 { // check for overflow.
		when = maxWhen
	}
	gp.sleepWhen = when
	gopark(resetForSleep, nil, waitReasonSleep, traceBlockSleep, 1)
}

// resetForSleep is called after the goroutine is parked for timeSleep.
// We can't call timer.reset in timeSleep itself because if this is a short

the go tool will verify that https://example.org/?go-get=1 contains the
same meta tag and then git clone https://code.org/r/p/exproj into
GOPATH/src/example.org.

When using GOPATH, downloaded packages are written to the first directory
listed in the GOPATH environment variable.
(See 'go help gopath-get' and 'go help gopath'.)

When using modules, downloaded packages are stored in the module cache.
See https://golang.org/ref/mod#module-cache.

	} else if modload.Enabled() {
		gomod = os.DevNull
	}
	modload.InitWorkfile()
	gowork := modload.WorkFilePath()
	// As a special case, if a user set off explicitly, report that in GOWORK.
	if cfg.Getenv("GOWORK") == "off" {
		gowork = "off"
	}
	return []cfg.EnvVar{
		{Name: "GOMOD", Value: gomod},
		{Name: "GOWORK", Value: gowork},
	}
}

         * protect ourselves from this, we park ourselves and tell our interrupter that we did so.
         */
        if (state == PARKED || compareAndSet(state, PARKED)) {
          // Interrupting Cow Says:
          //  ______
          // < Park >
          //  ------
          //        \   ^__^
          //         \  (oo)\_______

a small script engine configured in ../../script_test.go (not the system shell).

The scripts' supporting files are unpacked relative to $GOPATH/src
(aka $WORK/gopath/src) and then the script begins execution in that directory as
well. Thus the example above runs in $WORK/gopath/src with GOPATH=$WORK/gopath
and $WORK/gopath/src/hello.go containing the listed contents.

Each line of a script is parsed into a sequence of space-separated command

	// GOMODCACHE. If the default directory doesn't exist, use a temporary
	// directory instead. (That can occur, for example, when running under
	// run.bash with GO_TEST_SHORT=0: run.bash sets GOPATH=/nonexist-gopath, and
	// GO_TEST_SHORT=0 causes it to run this portion of the test.)
	var modcacheEnv []string
	{
		out, err := testenv.Command(t, goBin, "env", "GOMODCACHE").Output()
		if err != nil {

	}

	// Diagnose common mistake: GOPATH==GOROOT.
	// This setting is equivalent to not setting GOPATH at all,
	// which is not what most people want when they do it.
	if gopath := cfg.BuildContext.GOPATH; filepath.Clean(gopath) == filepath.Clean(cfg.GOROOT) {
		fmt.Fprintf(os.Stderr, "warning: GOPATH set to GOROOT (%s) has no effect\n", gopath)
	} else {
		for _, p := range filepath.SplitList(gopath) {

		}
	}

	// We need a writable GOPATH in which to run the tests.
	// Construct one in a temporary directory.
	var err error
	GOPATH, err = os.MkdirTemp("", "carchive_test")
	if err != nil {
		log.Panic(err)
	}
	if testWork {
		log.Println(GOPATH)
	} else {
		defer os.RemoveAll(GOPATH)
	}
	os.Setenv("GOPATH", GOPATH)

	// Copy testdata into GOPATH/src/testarchive, along with a go.mod file

	@echo "Installing minio binary with -race to '$(GOPATH)/bin/minio'"
	@mkdir -p $(GOPATH)/bin && cp -af $(PWD)/minio $(GOPATH)/bin/minio

install: build ## builds minio and installs it to $GOPATH/bin.
	@echo "Installing minio binary to '$(GOPATH)/bin/minio'"
	@mkdir -p $(GOPATH)/bin && cp -af $(PWD)/minio $(GOPATH)/bin/minio
	@echo "Installation successful. To learn more, try \"minio --help\"."

	// Copy testdata into GOPATH/src/testplugin, along with a go.mod file
	// declaring the same path.

	GOPATH, err := os.MkdirTemp("", "plugin_test")
	if err != nil {
		log.Panic(err)
	}
	defer os.RemoveAll(GOPATH)
	tmpDir = GOPATH
	fmt.Printf("TMPDIR=%s\n", tmpDir)

	modRoot := filepath.Join(GOPATH, "src", "testplugin")
	altRoot := filepath.Join(GOPATH, "alt", "src", "testplugin")