Store error details in a file in case of a panic

Tobias Melson · Tobias Melson · commit 52e16f6670af · 2021-05-05T19:45:43.000+02:00
diff --git a/README.md b/README.md
@@ -24,7 +24,7 @@ Among others, the following tools are included:
 
 ### Customization
 
-You can add a custom tab to the DevToolKit. Create a new file `pages.xml` next to the executable.
+You can add a custom tab to the DevToolKit. Create a new file called `pages.xml` in the same directory as the executable.
 Here is an example for a simple HTML page with just a single link:
 
 ```XML
@@ -45,6 +45,10 @@ Here, `<name>` must be a unique name, `<title>` is the button label, `<tooltip>`
  `<icon>` is the [Font Awesome](https://fontawesome.com/v5.14.0/icons?d=gallery&m=free) icon,
 and `<body>` is the HTML source of the page.
 
+### Errors
+
+In case of a crash, a stack trace is written to the file `panic.txt` in the same directory as the executable. If you raise a bug report, please attach the content of this file.
+
 ## Development
 
 ### Build locally
diff --git a/main.go b/main.go
@@ -5,9 +5,14 @@ import (
 	"github.com/qaware/dev-tool-kit/backend/core"
 	"github.com/qaware/dev-tool-kit/backend/ui"
 	"github.com/wailsapp/wails"
+	"io/ioutil"
+	"os"
+	"path"
+	"runtime/debug"
+	"time"
 )
 
-var version = "3.1.2"
+var version = "3.2.0"
 
 func main() {
 	js := mewn.String("./frontend/build/main.js")
@@ -29,5 +34,26 @@ func main() {
 	go core.InitUpgrade(version)
 	go core.CreateAsciiFont()
 
+	defer panicRecover()
+
 	app.Run()
 }
+
+func panicRecover() {
+	recovered := recover()
+	if recovered == nil {
+		return
+	}
+
+	exe, err := os.Executable()
+	if err != nil {
+		return
+	}
+	dir := path.Dir(exe)
+
+	appError, ok := recovered.(error)
+	if ok {
+		content := time.Now().String() + "\nVersion: " + version + "\n\n" + appError.Error() + "\n" + string(debug.Stack())
+		_ = ioutil.WriteFile(path.Join(dir, "panic.txt"), []byte(content), 0777)
+	}
+}
