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// Copyright 2016 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package bug implements the ``go bug'' command.
package bug
import (
"bytes"
"context"
"fmt"
exec "internal/execabs"
"io"
urlpkg "net/url"
"os"
"path/filepath"
"regexp"
"runtime"
"strings"
"cmd/go/internal/base"
"cmd/go/internal/cfg"
"cmd/go/internal/web"
)
var CmdBug = &base.Command{
Run: runBug,
UsageLine: "go bug",
Short: "start a bug report",
Long: `
Bug opens the default browser and starts a new bug report.
The report includes useful system information.
`,
}
func init() {
CmdBug.Flag.BoolVar(&cfg.BuildV, "v", false, "")
}
func runBug(ctx context.Context, cmd *base.Command, args []string) {
if len(args) > 0 {
base.Fatalf("go bug: bug takes no arguments")
}
var buf bytes.Buffer
buf.WriteString(bugHeader)
printGoVersion(&buf)
buf.WriteString("### Does this issue reproduce with the latest release?\n\n\n")
printEnvDetails(&buf)
buf.WriteString(bugFooter)
body := buf.String()
url := "https://github.com/golang/go/issues/new?body=" + urlpkg.QueryEscape(body)
if !web.OpenBrowser(url) {
fmt.Print("Please file a new issue at golang.org/issue/new using this template:\n\n")
fmt.Print(body)
}
}
const bugHeader = `<!-- Please answer these questions before submitting your issue. Thanks! -->
`
const bugFooter = `### What did you do?
<!--
If possible, provide a recipe for reproducing the error.
A complete runnable program is good.
A link on play.golang.org is best.
-->
### What did you expect to see?
### What did you see instead?
`
func printGoVersion(w io.Writer) {
fmt.Fprintf(w, "### What version of Go are you using (`go version`)?\n\n")
fmt.Fprintf(w, "<pre>\n")
fmt.Fprintf(w, "$ go version\n")
printCmdOut(w, "", "go", "version")
fmt.Fprintf(w, "</pre>\n")
fmt.Fprintf(w, "\n")
}
func printEnvDetails(w io.Writer) {
fmt.Fprintf(w, "### What operating system and processor architecture are you using (`go env`)?\n\n")
fmt.Fprintf(w, "<details><summary><code>go env</code> Output</summary><br><pre>\n")
fmt.Fprintf(w, "$ go env\n")
printCmdOut(w, "", "go", "env")
printGoDetails(w)
printOSDetails(w)
printCDetails(w)
fmt.Fprintf(w, "</pre></details>\n\n")
}
func printGoDetails(w io.Writer) {
printCmdOut(w, "GOROOT/bin/go version: ", filepath.Join(runtime.GOROOT(), "bin/go"), "version")
printCmdOut(w, "GOROOT/bin/go tool compile -V: ", filepath.Join(runtime.GOROOT(), "bin/go"), "tool", "compile", "-V")
}
func printOSDetails(w io.Writer) {
switch runtime.GOOS {
case "darwin", "ios":
printCmdOut(w, "uname -v: ", "uname", "-v")
printCmdOut(w, "", "sw_vers")
case "linux":
printCmdOut(w, "uname -sr: ", "uname", "-sr")
printCmdOut(w, "", "lsb_release", "-a")
printGlibcVersion(w)
case "openbsd", "netbsd", "freebsd", "dragonfly":
printCmdOut(w, "uname -v: ", "uname", "-v")
case "illumos", "solaris":
// Be sure to use the OS-supplied uname, in "/usr/bin":
printCmdOut(w, "uname -srv: ", "/usr/bin/uname", "-srv")
out, err := os.ReadFile("/etc/release")
if err == nil {
fmt.Fprintf(w, "/etc/release: %s\n", out)
} else {
if cfg.BuildV {
fmt.Printf("failed to read /etc/release: %v\n", err)
}
}
}
}
func printCDetails(w io.Writer) {
printCmdOut(w, "lldb --version: ", "lldb", "--version")
cmd := exec.Command("gdb", "--version")
out, err := cmd.Output()
if err == nil {
// There's apparently no combination of command line flags
// to get gdb to spit out its version without the license and warranty.
// Print up to the first newline.
fmt.Fprintf(w, "gdb --version: %s\n", firstLine(out))
} else {
if cfg.BuildV {
fmt.Printf("failed to run gdb --version: %v\n", err)
}
}
}
// printCmdOut prints the output of running the given command.
// It ignores failures; 'go bug' is best effort.
func printCmdOut(w io.Writer, prefix, path string, args ...string) {
cmd := exec.Command(path, args...)
out, err := cmd.Output()
if err != nil {
if cfg.BuildV {
fmt.Printf("%s %s: %v\n", path, strings.Join(args, " "), err)
}
return
}
fmt.Fprintf(w, "%s%s\n", prefix, bytes.TrimSpace(out))
}
// firstLine returns the first line of a given byte slice.
func firstLine(buf []byte) []byte {
idx := bytes.IndexByte(buf, '\n')
if idx > 0 {
buf = buf[:idx]
}
return bytes.TrimSpace(buf)
}
// printGlibcVersion prints information about the glibc version.
// It ignores failures.
func printGlibcVersion(w io.Writer) {
tempdir := os.TempDir()
if tempdir == "" {
return
}
src := []byte(`int main() {}`)
srcfile := filepath.Join(tempdir, "go-bug.c")
outfile := filepath.Join(tempdir, "go-bug")
err := os.WriteFile(srcfile, src, 0644)
if err != nil {
return
}
defer os.Remove(srcfile)
cmd := exec.Command("gcc", "-o", outfile, srcfile)
if _, err = cmd.CombinedOutput(); err != nil {
return
}
defer os.Remove(outfile)
cmd = exec.Command("ldd", outfile)
out, err := cmd.CombinedOutput()
if err != nil {
return
}
re := regexp.MustCompile(`libc\.so[^ ]* => ([^ ]+)`)
m := re.FindStringSubmatch(string(out))
if m == nil {
return
}
cmd = exec.Command(m[1])
out, err = cmd.Output()
if err != nil {
return
}
fmt.Fprintf(w, "%s: %s\n", m[1], firstLine(out))
// print another line (the one containing version string) in case of musl libc
if idx := bytes.IndexByte(out, '\n'); bytes.Index(out, []byte("musl")) != -1 && idx > -1 {
fmt.Fprintf(w, "%s\n", firstLine(out[idx+1:]))
}
}
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