cmd/geth: added 'geth bug' command

Added bug command to geth, which will open a browser window
with an issue template and some additional system information.

cmd/geth/bugcmd.go

@@ -0,0 +1,100 @@
+// Copyright 2017 The go-ethereum Authors
+// This file is part of go-ethereum.
+//
+// go-ethereum is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// go-ethereum is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
+
+package main
+
+import (
+	"bytes"
+	"html/template"
+	"net/url"
+	"os/exec"
+	"runtime"
+
+	"github.com/ethereum/go-ethereum/params"
+
+	cli "gopkg.in/urfave/cli.v1"
+)
+
+var bugCommand = cli.Command{
+	Action:    reportBug,
+	Name:      "bug",
+	Usage:     "opens a window to report a bug on the geth repo",
+	ArgsUsage: " ",
+	Category:  "MISCELLANEOUS COMMANDS",
+}
+
+// reportBug reports a bug by opening a new URL to the go-ethereum GH issue
+// tracker and setting default values as the issue body.
+func reportBug(ctx *cli.Context) error {
+	// compile the bug report template or crash
+	t := template.Must(template.New("bug-report").Parse(bugTemplate))
+
+	// assemble the info for the bug template
+	uname, err := uname()
+	if err != nil {
+		return err
+	}
+
+	info := struct {
+		Version, GoVersion, OS, Uname string
+	}{Version: params.Version, GoVersion: runtime.Version(), OS: runtime.GOOS, Uname: uname}
+
+	// execute template and write contents to buff
+	var buff bytes.Buffer
+	if err := t.Execute(&buff, info); err != nil {
+		return err
+	}
+
+	// open a new GH issue
+	return exec.Command("open", "https://github.com/ethereum/go-ethereum/issues/new?body="+url.QueryEscape(buff.String())).Start()
+}
+
+const bugTemplate = `Please answer these questions before submitting your issue. Thanks!
+
+#### What did you do?
+
+#### What did you expect to see?
+
+#### What did you see instead?
+
+#### System details
+
+Version: {{.Version}}
+
+Go Version: {{.GoVersion}}
+OS: {{.OS}}
+uname -a: {{.Uname}}
+`
+
+// uname returns machine hardware, os release, name and version.
+func uname() (string, error) {
+	// figure out the uname of the system (e.g. uname, systeminfo)
+	var (
+		err   error
+		uname []byte
+		cmd   = [2]string{"uname", "-a"}
+	)
+
+	if runtime.GOOS == "windows" {
+		cmd = [2]string{"systeminfo"}
+	}
+
+	uname, err = exec.Command(cmd[0], cmd[1]).Output()
+	if err != nil {
+		return "", err
+	}
+	return string(uname), err
+}

cmd/geth/main.go

@@ -81,6 +81,7 @@ func init() {
 		// See misccmd.go:
 		makedagCommand,
 		versionCommand,
+		bugCommand,
 		licenseCommand,
 	}