env GOPRIVATE=test/main

# Unknown build flags should result in errors.
! garble reverse -badflag
stderr 'flag provided but not defined'

garble build
exec ./main
cp stderr main.stderr
exec cat main.stderr

# Ensure that the garbled panic output looks correct.
# This output is not reproducible between 'go test' runs,
# so we can't use a static golden file.
grep 'goroutine 1 \[running\]' main.stderr
! grep 'ExportedLibFunc|unexportedMainFunc|test/main|main.go|lib.go' main.stderr

stdin main.stderr
garble reverse
stdout -count=1 'test/main/lib\.ExportedLibFunc'
stdout -count=1 'main\.unexportedMainFunc'
# TODO: this is what we want when "reverse" is finished
# cmp stdout reverse.stdout

# Ensure that the reversed output matches the non-garbled output.
go build -trimpath
exec ./main
cmp stderr reverse.stdout

-- go.mod --
module test/main

go 1.15
-- main.go --
package main

import (
	"os"

	"test/main/lib"
)

func main() {
	unexportedMainFunc()
}

func unexportedMainFunc() {
	if err := lib.ExportedLibFunc(os.Stderr); err != nil {
		panic(err)
	}
}
-- lib/lib.go --
package lib

import (
	"io"
	"regexp"
	"runtime/debug"
)

func ExportedLibFunc(w io.Writer) error {
	// Panic outputs include "0xNN" pointers and offsets which change
	// between platforms.
	// Strip them out here, to have portable static stdout files.
	rxVariableSuffix := regexp.MustCompile(`0x[0-9a-f]+`)

	stack := debug.Stack()
	stack = rxVariableSuffix.ReplaceAll(stack, []byte("0x??"))
	_, err := w.Write(stack)
	return err
}
-- reverse.stdout --
goroutine 1 [running]:
runtime/debug.Stack(0x??, 0x??, 0x??)
	runtime/debug/stack.go:24 +0x??
test/main/lib.ExportedLibFunc(0x??, 0x??, 0x??, 0x??)
	test/main/lib/lib.go:15 +0x??
main.unexportedMainFunc(...)
	test/main/main.go:14
main.main()
	test/main/main.go:10 +0x??