}
	chldStdout, err := cmd.StdoutPipe()
	if err != nil {
		t.Fatalf("failed to create new stdout pipe: %v", err)
	}
	stderr := new(strings.Builder)
	cmd.Stderr = stderr

	err = cmd.Start()
	defer func() {
		chldStdin.Close()
		cmd.Wait()
		if stderr.Len() > 0 {
			t.Logf("stderr:\n%s", stderr)
		}
	}()
	if err != nil {
		t.Fatalf("failed to start first child process: %v", err)
	}

go list -test -f '{{.XTestEmbedFiles}}'
stdout '\[z.txt\]'

# build embeds x.txt
go build -x
stderr 'x.txt'

# build uses cache correctly
go build -x
! stderr 'x.txt'
cp x.txt2 x.txt
go build -x
stderr 'x.txt'

# build rejects invalid names
cp x.go2 x.go
go build -x
cp x.txt .git
! go build -x
stderr '^x.go:5:12: pattern [*]t: cannot embed file [.]git: invalid name [.]git$'
rm .git

stderr '^go: warning: example.com/retract/rationale@v1.0.0-multiline2: retracted by module author: short description$'
! stderr 'detail'

# Same for 'go list'.
go list -m -retracted -f '{{.Retracted}}' example.com/retract/rationale
cmp stdout multiline


# 'go get' should omit long messages.
go get example.com/retract/rationale@v1.0.0-long

go get rsc.io/sampler@none
stderr '^go: downgraded rsc.io/quote v1.5.2 => v1.3.0$'
stderr '^go: removed rsc.io/sampler v1.3.0$'
! stderr '^go get.*golang.org/x/text'
cmp go.mod go.mod.downgrade

# When removing or downgrading a requirement, 'go get' also prints a message
# for explicit dependencies removed as a consequence.
cp go.mod.usequote go.mod
go get rsc.io/quote@v1.5.1
stderr '^go: downgraded rsc.io/quote v1.5.2 => v1.5.1$'

cp go.work.repeated.txt go.work
! go list
stderr '^go.work:4: path .* appears multiple times in workspace$'

cp go.work.badgodebug.txt go.work
! go list
stderr '^go.work:3: unknown godebug "foo"$'

cp go.work.unparsable.txt go.work
! go list
stderr '^go.work:5: unknown directive: notadirective'

cp go.work.firstlineerr.txt go.work
! go list
stderr '^go.work:1: unknown godebug "bar"$'

stderr 'Confirm the import path was entered correctly.'
stderr 'If this is a private repository, see https://golang.org/doc/faq#git_https for additional information.'
! stdout .

# Fetching a nonexistent commit should return an "unknown revision"
# error message.
! go mod download github.com/golang/term@86186f3aba07ed0212cfb944f3398997d2d07c6b

	}
	return &ConsoleLogger{
		stdOut: stdOut,
		stdErr: stdErr,
		scope:  s,
	}
}

// NewDefaultLogger creates a new logger that outputs to stdout/stderr at default scope.
func NewDefaultLogger() *ConsoleLogger {
	return NewConsoleLogger(os.Stdout, os.Stderr, nil)
}

func (l *ConsoleLogger) LogAndPrint(v ...any) {
	if len(v) == 0 {
		return
	}
	s := fmt.Sprint(v...)

stderr '^go: found rsc.io/quote in rsc.io/quote v1.5.2$'
stderr '^Hello, world.$'


# 'go run pkg@version' should report an error if pkg is not a main package.
! go run example.com/cmd/err@v1.0.0
stderr '^package example.com/cmd/err is not a main package$'


# 'go run pkg@version' should report errors if the module contains
# replace or exclude directives.
go mod download example.com/cmd@v1.0.0-replace

! go get rsc.io/quote
stderr 'go: rsc.io/quote@v1.5.2: verifying module: checksum mismatch'
stderr 'downloaded: h1:3fEy'
stderr 'localhost.localdev/sumdb: h1:wrong'
stderr 'SECURITY ERROR\nThis download does NOT match the one reported by the checksum server.'
! go get rsc.io/sampler
! go get golang.org/x/text

go mod edit -require rsc.io/quote@v1.5.2
! go mod tidy

env GO111MODULE=on
env proxy=$GOPROXY
env GOPROXY=direct

# GOVCS stops go get
env GOVCS='*:none'
! go get github.com/google/go-cmp
stderr '^go: GOVCS disallows using git for public github.com/google/go-cmp; see ''go help vcs''$'
env GOPRIVATE='github.com/google'
! go get github.com/google/go-cmp
stderr '^go: GOVCS disallows using git for private github.com/google/go-cmp; see ''go help vcs''$'

# public pattern works