issue22660.go

     1  // run
     2  
     3  //go:build !js && !wasip1 && gc
     4  
     5  // Copyright 2017 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  package main
    10  
    11  import (
    12  	"bytes"
    13  	"fmt"
    14  	"io/ioutil"
    15  	"log"
    16  	"os"
    17  	"os/exec"
    18  	"path/filepath"
    19  	"strings"
    20  )
    21  
    22  func main() {
    23  	f, err := ioutil.TempFile("", "issue22660.go")
    24  	if err != nil {
    25  		log.Fatal(err)
    26  	}
    27  	f.Close()
    28  	defer os.Remove(f.Name())
    29  
    30  	// path must appear in error messages even if we strip them with -trimpath
    31  	path := filepath.Join("users", "xxx", "go")
    32  	var src bytes.Buffer
    33  	fmt.Fprintf(&src, "//line %s:1\n", filepath.Join(path, "foo.go"))
    34  
    35  	if err := ioutil.WriteFile(f.Name(), src.Bytes(), 0660); err != nil {
    36  		log.Fatal(err)
    37  	}
    38  
    39  	out, err := exec.Command("go", "tool", "compile", "-p=p", fmt.Sprintf("-trimpath=%s", path), f.Name()).CombinedOutput()
    40  	if err == nil {
    41  		log.Fatalf("expected compiling %s to fail", f.Name())
    42  	}
    43  
    44  	if !strings.HasPrefix(string(out), path) {
    45  		log.Fatalf("expected full path (%s) in error message, got:\n%s", path, out)
    46  	}
    47  }
    48
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