1 files changed, 211 insertions, 0 deletions
diff --git a/src/cmd/go/internal/bug/bug.go b/src/cmd/go/internal/bug/bug.go
new file mode 100644
index 0000000..4aa08b4
--- /dev/null
+++ b/src/cmd/go/internal/bug/bug.go
@@ -0,0 +1,211 @@
+// 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:]))
+	}
+}