120 lines
3.4 KiB
Go
120 lines
3.4 KiB
Go
// gomuks - A terminal Matrix client written in Go.
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// Copyright (C) 2019 Tulir Asokan
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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package debug
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import (
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"bytes"
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"fmt"
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"io"
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"io/ioutil"
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"os"
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"runtime/debug"
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"time"
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)
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var writer io.Writer
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var RecoverPrettyPanic bool
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var OnRecover func()
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func init() {
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var err error
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writer, err = os.OpenFile("/tmp/gomuks-debug.log", os.O_WRONLY|os.O_CREATE|os.O_APPEND, 0644)
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if err != nil {
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writer = nil
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}
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}
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func Printf(text string, args ...interface{}) {
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if writer != nil {
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fmt.Fprintf(writer, time.Now().Format("[2006-01-02 15:04:05] "))
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fmt.Fprintf(writer, text+"\n", args...)
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}
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}
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func Print(text ...interface{}) {
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if writer != nil {
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fmt.Fprintf(writer, time.Now().Format("[2006-01-02 15:04:05] "))
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fmt.Fprintln(writer, text...)
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}
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}
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func PrintStack() {
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if writer != nil {
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data := debug.Stack()
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writer.Write(data)
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}
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}
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// Recover recovers a panic, runs the OnRecover handler and either re-panics or
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// shows an user-friendly message about the panic depending on whether or not
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// the pretty panic mode is enabled.
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func Recover() {
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if p := recover(); p != nil {
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if OnRecover != nil {
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OnRecover()
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}
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if RecoverPrettyPanic {
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PrettyPanic(p)
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} else {
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panic(p)
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}
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}
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}
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const Oops = ` __________
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< Oh noes! >
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‾‾‾\‾‾‾‾‾‾
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\ ^__^
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\ (XX)\_______
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(__)\ )\/\
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U ||----W |
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|| ||`
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func PrettyPanic(panic interface{}) {
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fmt.Println(Oops)
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fmt.Println("")
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fmt.Println("A fatal error has occurred.")
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fmt.Println("")
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traceFile := fmt.Sprintf("/tmp/gomuks-panic-%s.txt", time.Now().Format("2006-01-02--15-04-05"))
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var buf bytes.Buffer
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fmt.Fprintln(&buf, panic)
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buf.Write(debug.Stack())
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err := ioutil.WriteFile(traceFile, buf.Bytes(), 0644)
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if err != nil {
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fmt.Println("Saving the stack trace to", traceFile, "failed:")
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fmt.Println("--------------------------------------------------------------------------------")
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fmt.Println(err)
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fmt.Println("--------------------------------------------------------------------------------")
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fmt.Println("")
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fmt.Println("You can file an issue at https://github.com/tulir/gomuks/issues.")
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fmt.Println("Please provide the file save error (above) and the stack trace of the original error (below) when filing an issue.")
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fmt.Println("")
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fmt.Println("--------------------------------------------------------------------------------")
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fmt.Println(panic)
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debug.PrintStack()
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fmt.Println("--------------------------------------------------------------------------------")
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} else {
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fmt.Println("The stack trace has been saved to", traceFile)
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fmt.Println("")
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fmt.Println("You can file an issue at https://github.com/tulir/gomuks/issues.")
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fmt.Println("Please provide the contents of that file when filing an issue.")
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}
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os.Exit(1)
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}
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