exec ./example.exe
stdout '^GOROOT '$TESTGO_GOROOT'$'
stdout '^runtime '$TESTGO_GOROOT${/}src${/}runtime'$'

! exec ./example-trimpath.exe
stdout '^GOROOT $'
stderr 'cannot find package "runtime" in any of:\n\t\(\$GOROOT not set\)\n\t'$WORK${/}gopath${/}src${/}runtime' \(from \$GOPATH\)\n\z'

exec ./example.test.exe -test.v
stdout '^GOROOT '$TESTGO_GOROOT'$'
stdout '^runtime '$TESTGO_GOROOT${/}src${/}runtime'$'

env GOROOT=$WORK/goroot1
symlink $GOROOT -> $TESTGO_GOROOT

# Set up fresh GOCACHE
env GOCACHE=$WORK/gocache1
mkdir $GOCACHE

# Build a simple binary
go build -o binary1 -trimpath -x main.go

# Now repeat the same process with the compiler at a different local path
env GOROOT=$WORK/goroot2
symlink $GOROOT -> $TESTGO_GOROOT

env GOCACHE=$WORK/gocache2
mkdir $GOCACHE

# 1. /tmp/go.mod exists
# 2. run 'go mod tidy' in /tmp or in the child directory not having go.mod.

[GOOS:plan9] stop  # Plan 9 has no $TMPDIR variable to set.

env GOROOT=$TESTGO_GOROOT
env TMP=$WORK
env TMPDIR=$WORK
mkdir $WORK/child

! go mod tidy
! stdout .
stderr 'go: go.mod file not found in current directory or any parent directory'

cd $WORK/child
! go mod tidy
! stdout .

go tool dist list -json -broken
stdout '"GOOS": "'$GOOS'",\n\s*"GOARCH": "'$GOARCH'",\n'
cp stdout tool-json-broken.txt

[short] stop


# Check against the real cmd/dist as the source of truth.

env GOROOT=$TESTGO_GOROOT
go build -o dist.exe cmd/dist

exec ./dist.exe list
cmp stdout tool.txt

exec ./dist.exe list -v
cmp stdout tool-v.txt

exec ./dist.exe list -broken
cmp stdout tool-broken.txt

	GOEXE=<executable file suffix: .exe on Windows, empty on other systems>
	GOOS=<target GOOS>
	GOPATH=$WORK/gopath
	GOPROXY=<local module proxy serving from cmd/go/testdata/mod>
	GOROOT=<actual GOROOT>
	TESTGO_GOROOT=<GOROOT used to build cmd/go, for use in tests that may change GOROOT>
	HOME=/no-home
	PATH=<actual PATH>
	TMPDIR=$WORK/tmp
	GODEBUG=<actual GODEBUG>
	devnull=<value of os.DevNull>

		"GOPROXY=" + proxyURL,
		"GOPRIVATE=",
		"GOROOT=" + testGOROOT,
		"GOTRACEBACK=system",
		"TESTGONETWORK=panic", // allow only local connections by default; the [net] condition resets this
		"TESTGO_GOROOT=" + testGOROOT,
		"TESTGO_EXE=" + testGo,
		"TESTGO_VCSTEST_HOST=" + httpURL.Host,
		"TESTGO_VCSTEST_TLS_HOST=" + httpsURL.Host,
		"TESTGO_VCSTEST_CERT=" + srvCertFile,

	GOEXE=<executable file suffix: .exe on Windows, empty on other systems>
	GOOS=<target GOOS>
	GOPATH=$WORK/gopath
	GOPROXY=<local module proxy serving from cmd/go/testdata/mod>
	GOROOT=<actual GOROOT>
	TESTGO_GOROOT=<GOROOT used to build cmd/go, for use in tests that may change GOROOT>
	HOME=/no-home
	PATH=<actual PATH>
	TMPDIR=$WORK/tmp
	GODEBUG=<actual GODEBUG>
	devnull=<value of os.DevNull>

		toolchain.TestVersionSwitch = os.Getenv("TESTGO_VERSION_SWITCH")
		if v := os.Getenv("TESTGO_TOOLCHAIN_VERSION"); v != "" {
			work.ToolchainVersion = v
		}

		if testGOROOT := os.Getenv("TESTGO_GOROOT"); testGOROOT != "" {
			// Disallow installs to the GOROOT from which testgo was built.
			// Installs to other GOROOTs — such as one set explicitly within a test — are ok.
			work.AllowInstall = func(a *work.Action) error {