feat(args): improve file open logic

main.rb

@@ -8,10 +8,24 @@ args = ARGV
 
 if args[0] == '--parse' || args[0] == '-p'
   puts("[!] Opening log file at #{args[1]}")
+
+  begin
     logfile = File.open(args[1])
+  rescue Errno::ENOENT
+    warn "[x] The file #{args[1]} was not found."
+    exit 1
+  end
+
 else
   puts('[!] Log file path not provided, assuming default access.log')
-  logfile = File.open('access.log', 'a')
+
+  begin
+    logfile = File.open('access.log')
+  rescue Errno::ENOENT
+    warn '[x] Default file access.log not found. Specify an alternative log file to parse with -p or --parse.'
+    exit 1
+  end
+
 end
 
 data = logfile.read