1// run
2
3//go:build !nacl && !js && !wasip1 && gc
4
5// Copyright 2020 The Go Authors. All rights reserved.
6// Use of this source code is governed by a BSD-style
7// license that can be found in the LICENSE file.
8
9// Tests that when non-existent files are passed to the
10// compiler, such as in:
11//    go tool compile foo
12// we don't print the beginning position:
13//    foo:0: open foo: no such file or directory
14// but instead omit it and print out:
15//    open foo: no such file or directory
16
17package main
18
19import (
20	"fmt"
21	"io/ioutil"
22	"os"
23	"os/exec"
24	"regexp"
25)
26
27func main() {
28	tmpDir, err := ioutil.TempDir("", "issue36437")
29	if err != nil {
30		panic(err)
31	}
32	defer os.RemoveAll(tmpDir)
33
34	msgOrErr := func(msg []byte, err error) string {
35		if len(msg) == 0 && err != nil {
36			return err.Error()
37		}
38		return string(msg)
39	}
40
41	filename := "non-existent.go"
42	output, err := exec.Command("go", "tool", "compile", filename).CombinedOutput()
43	got := msgOrErr(output, err)
44
45	regFilenamePos := regexp.MustCompile(filename + ":\\d+")
46	if regFilenamePos.MatchString(got) {
47		fmt.Printf("Error message must not contain filename:pos, but got:\n%q\n", got)
48	}
49}
50