[!GOOS:windows] [short] stop 'this test only applies to Windows'
env GO111MODULE=off

go build run_go.go
exec ./run_go$GOEXE $GOPATH $GOPATH/src/vend/hello
stdout 'hello, world'

-- run_go.go --
package main

import (
	"fmt"
	"os"
	"os/exec"
	"path/filepath"
	"strings"
)

func changeVolume(s string, f func(s string) string) string {
	vol := filepath.VolumeName(s)
	return f(vol) + s[len(vol):]
}

func main() {

env GO111MODULE=off

# Issue 28035: go test -c -o NUL should work.
# Issue 28549: go test -c -o /dev/null should not overwrite /dev/null when run as root.
cd x
cmp $devnull $WORK/empty.txt
go test -o=$devnull -c
! exists x.test$GOEXE
cmp $devnull $WORK/empty.txt

# Issue 12407: go build -o /dev/null should succeed.
cd ..
go build -o $devnull y
cmp $devnull $WORK/empty.txt

-- x/x_test.go --
package x_test
import (
    "testing"
)

env GOCACHE=$WORK/gocache
exec ./fuzz.test$GOEXE -test.fuzzcachedir=$GOCACHE/fuzz -test.fuzz=FuzzMinCache -test.fuzztime=1000x
go run check_cache/check_cache.go $GOCACHE/fuzz/FuzzMinCache

# Test that minimization occurs for a crash that appears while minimizing a
# newly found interesting input. There must be only one worker for this test to
# be flaky like we want.

# as a control case (to ensure that our regexps do catch rebuilds).

[!short] env GOCACHE=$WORK/cache
[!short] env CGO_CFLAGS=-DTestScript_cgo_stale_precompiled=true
go build -x runtime/cgo
[!short] stderr '[/\\]cgo'$GOEXE'["]? .* -importpath runtime/cgo'

# https://go.dev/issue/47215: a missing $(go env CC) caused the precompiled net
# to be stale. But as of https://go.dev/cl/452457 the precompiled libraries are

	CGO_LDFLAGS
	CGO_LDFLAGS_ALLOW
	CGO_LDFLAGS_DISALLOW
	CXX
	FC
	GCCGO
	GO111MODULE
	GO386
	GOAMD64
	GOARCH
	GOARM
	GOARM64
	GOBIN
	GOCACHE
	GOCACHEPROG
	GOENV
	GOEXE
	GOEXPERIMENT
	GOFLAGS
	GOGCCFLAGS
	GOHOSTARCH
	GOHOSTOS
	GOINSECURE
	GOMIPS
	GOMIPS64
	GOMODCACHE
	GONOPROXY
	GONOSUMDB
	GOOS
	GOPATH
	GOPPC64
	GOPRIVATE
	GOPROXY
	GORISCV64

stderr 'GOPATH entry is relative'

[short] stop

# Empty paths in GOPATH should be ignored (issue 21928).
env GOPATH=${:}$ORIG_GOPATH
env GOPATH
go install go-cmd-test
exists $ORIG_GOPATH/bin/go-cmd-test$GOEXE

-- go-cmd-test/helloworld.go --
package main

func main() {
	println("hello world")

# the seed corpus before attempting to fuzz.

go test -c
! exec ./x.test$GOEXE -test.fuzz=FuzzWithAdd -test.run=FuzzWithAdd -test.fuzztime=1x -test.fuzzcachedir=$WORK/cache
! stdout ^ok
! stdout 'Failing input written to testdata[/\\]fuzz[/\\]FuzzWithAdd[/\\]'
stdout FAIL
stderr warning

go test -c
! exec ./x.test$GOEXE -test.fuzz=FuzzWithTestdata -test.run=FuzzWithTestdata -test.fuzztime=1x -test.fuzzcachedir=$WORK/cache

env GOPATH=$root/other
go env -u GOPATH
! stderr .+
go env -u GOPATH
! stderr .+

# go env -w rejects unknown or bad variables
! go env -w GOGC=off
stderr 'unknown go command variable GOGC'
! go env -w GOEXE=.bat
stderr 'GOEXE cannot be modified'
! go env -w GOVERSION=customversion
stderr 'GOVERSION cannot be modified'
! go env -w GOENV=/env
stderr 'GOENV can only be set using the OS environment'
! go env -w GODEBUG=gctrace=1

  main\.main\(\)
      .*/main\.go:34 \+0x[0-9,a-f]+

Previous write at 0x[0-9,a-f]+ by goroutine [0-9]:
  main\.goCallback\(\)
      .*/main\.go:27 \+0x[0-9,a-f]+
  _cgoexp_[0-9a-z]+_goCallback\(\)
      .*_cgo_gotypes\.go:[0-9]+ \+0x[0-9,a-f]+
  _cgoexp_[0-9a-z]+_goCallback\(\)
      <autogenerated>:1 \+0x[0-9,a-f]+

Goroutine [0-9] \(running\) created at:
  runtime\.newextram\(\)

[short] skip

env TESTGO_VERSION=go1.21pre3

# Compile a fake toolchain to put in the path under various names.
env GOTOOLCHAIN=
mkdir $WORK/bin
go build -o $WORK/bin/go1.50.0$GOEXE ./fakego.go  # adds .exe extension implicitly on Windows

[!GOOS:plan9] env PATH=$WORK/bin
[GOOS:plan9] env path=$WORK/bin

go version
stdout go1.21pre3

# GOTOOLCHAIN=go1.50.0
env GOTOOLCHAIN=go1.50.0