generate parent folders of report if missing

src/report.rs

@@ -4,6 +4,7 @@ use std::any::TypeId;
 use std::cell::RefCell;
 use std::collections::HashMap;
 use std::env;
+use std::fs;
 use std::fs::File;
 use std::path::PathBuf;
 
@@ -32,7 +33,11 @@ impl ConfigReportOptions {
  self
  }
  /// Sets the directory where reports will be output
+ /// # Panics
+ /// if the directory in which the report is to be stored does not exist and cannot be created
  pub fn directory(&mut self, directory: PathBuf) -> &mut ConfigReportOptions {
+ // if the directory does not exist, create it
+ fs::create_dir_all(directory.clone()).expect("Failed to create directory");
  self.directory = directory;
  self
  }