Appending to file instead of overwriting

genesyscloud/util/files/util_files.go

@@ -254,3 +254,28 @@ func WriteToFile(bytes []byte, path string) diag.Diagnostics {
 	}
 	return nil
 }
+
+// AppendToFile appends data to a file. If the file does not exist, it will be created.
+func AppendToFile(filename string, data []byte) (err error) {
+	defer func() {
+		if err != nil {
+			err = fmt.Errorf("AppendToFile: %w", err)
+		}
+	}()
+
+	// Open file with append mode (O_APPEND), create if it doesn't exist (O_CREATE),
+	// and set write permission (O_WRONLY)
+	file, err := os.OpenFile(filename, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
+	if err != nil {
+		return err
+	}
+
+	// Write the data to the file
+	_, err = file.Write(data)
+	if err != nil {
+		_ = file.Close()
+		return err
+	}
+	_ = file.Close()
+	return err
+}

genesyscloud/util/panic_recovery_logger/panic_recovery_logger.go

@@ -2,8 +2,8 @@ package panic_recovery_logger
 
 import (
 	"fmt"
-	"os"
 	"runtime/debug"
+	"terraform-provider-genesyscloud/genesyscloud/util/files"
 )
 
 type PanicRecoveryLogger struct {
@@ -31,7 +31,7 @@ func GetPanicRecoveryLoggerInstance() *PanicRecoveryLogger {
 
 func (p *PanicRecoveryLogger) WriteStackTracesToFile(r any) error {
 	tracesToWrite := fmt.Sprintf("\nStacktrace recovered: %v. %s", r, string(debug.Stack()))
-	if err := os.WriteFile(p.filePath, []byte(tracesToWrite), os.ModePerm); err != nil {
+	if err := files.AppendToFile(p.filePath, []byte(tracesToWrite)); err != nil {
 		return fmt.Errorf("WriteStackTracesToFile: failed to write to file %s: %w", p.filePath, err)
 	}
 	return nil