logging: added a log on panic

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>

3 files changed, 15 insertions, 1 deletions

diff --git a/lib/open.go b/lib/open.go
index 8a016eb3..f395d13d 100644
--- a/lib/open.go
+++ b/lib/open.go
@@ -3,6 +3,8 @@ package lib
 import (
 	"os/exec"
 	"runtime"
+
+	"git.sr.ht/~rjarry/aerc/logging"
 )
 
 var openBin string = "xdg-open"
@@ -49,6 +51,8 @@ func (xdg *xdgOpen) Start() error {
 		return err
 	}
 	go func() {
+		defer logging.PanicHandler()
+
 		xdg.errCh <- xdg.cmd.Wait()
 		close(xdg.errCh)
 	}()
diff --git a/lib/socket.go b/lib/socket.go
index 814dce12..ae1ce339 100644
--- a/lib/socket.go
+++ b/lib/socket.go
@@ -13,6 +13,7 @@ import (
 	"sync/atomic"
 	"time"
 
+	"git.sr.ht/~rjarry/aerc/logging"
 	"github.com/kyoh86/xdg"
 )
 
@@ -36,6 +37,8 @@ func StartServer(logger *log.Logger) (*AercServer, error) {
 	}
 	// TODO: stash clients and close them on exit... bleh racey
 	go func() {
+		defer logging.PanicHandler()
+
 		for {
 			conn, err := l.Accept()
 			if err != nil {
@@ -44,7 +47,11 @@ func StartServer(logger *log.Logger) (*AercServer, error) {
 				as.logger.Printf("Closing Unix server: %v", err)
 				return
 			}
-			go as.handleClient(conn)
+			go func() {
+				defer logging.PanicHandler()
+
+				as.handleClient(conn)
+			}()
 		}
 	}()
 	return as, nil
diff --git a/lib/ui/ui.go b/lib/ui/ui.go
index 66c2a054..b65c06a4 100644
--- a/lib/ui/ui.go
+++ b/lib/ui/ui.go
@@ -3,6 +3,7 @@ package ui
 import (
 	"sync/atomic"
 
+	"git.sr.ht/~rjarry/aerc/logging"
 	"github.com/gdamore/tcell/v2"
 )
 
@@ -43,6 +44,8 @@ func Initialize(content DrawableInteractive) (*UI, error) {
 
 	state.exit.Store(false)
 	go func() {
+		defer logging.PanicHandler()
+
 		for !state.ShouldExit() {
 			state.tcEvents <- screen.PollEvent()
 		}