ae83373fa6
Since panics still regularly "destroy" the terminal, it is hard to get a stack trace for panics you do not anticipate. This commit adds a panic handler that automatically creates a logfile inside the current working directory. It has to be added to every goroutine that is started and will repair the terminal on a panic. Signed-off-by: Moritz Poldrack <git@moritz.sh> Acked-by: Robin Jarry <robin@jarry.cc>
56 lines
1.4 KiB
Go
56 lines
1.4 KiB
Go
package logging
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import (
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"fmt"
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"io"
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"os"
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"runtime/debug"
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"strings"
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"time"
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)
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var UICleanup = func() {}
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// PanicHandler tries to restore the terminal. A stack trace is written to
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// aerc-crash.log and then passed on if a panic occurs.
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func PanicHandler() {
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r := recover()
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if r == nil {
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return
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}
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UICleanup()
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filename := time.Now().Format("/tmp/aerc-crash-20060102-150405.log")
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panicLog, err := os.OpenFile(filename, os.O_SYNC|os.O_APPEND|os.O_CREATE|os.O_WRONLY|os.O_EXCL, 0o600)
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if err != nil {
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// we tried, not possible. bye
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panic(r)
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}
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defer panicLog.Close()
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outputs := io.MultiWriter(panicLog, os.Stderr)
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// if any error happens here, we do not care.
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fmt.Fprintln(panicLog, strings.Repeat("#", 80))
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fmt.Fprint(panicLog, strings.Repeat(" ", 34))
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fmt.Fprintln(panicLog, "PANIC CAUGHT!")
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fmt.Fprint(panicLog, strings.Repeat(" ", 24))
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fmt.Fprintln(panicLog, time.Now().Format("2006-01-02T15:04:05.000000-0700"))
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fmt.Fprintln(panicLog, strings.Repeat("#", 80))
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fmt.Fprintf(outputs, "%s\n", panicMessage)
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fmt.Fprintf(panicLog, "Error: %v\n\n", r)
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panicLog.Write(debug.Stack())
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fmt.Fprintf(os.Stderr, "\nThis error was also written to: %s\n", filename)
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panic(r)
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}
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const panicMessage = `
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aerc has encountered a critical error and has terminated. Please help us fixing
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this by sending this log and the steps to reproduce the crash to:
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~rjarry/aerc-devel@lists.sr.ht
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Thank you
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`
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