Load defaults from environment variables

src/conf.rs

@@ -17,10 +17,22 @@ impl Conf {
             Err(_) => "http://localhost:4444".to_string(),
             Ok(v)  => v,
         };
+        let default_job_dir = match std::env::var("HAUNTER_JOBS_DIR") {
+            Err(_) => PathBuf::from("jobs.d".to_string()),
+            Ok(v) => PathBuf::from(v),
+        };
+        let default_results_dir = match std::env::var("HAUNTER_RESULTS_DIR") {
+            Err(_) => PathBuf::from("results.d".to_string()),
+            Ok(v) => PathBuf::from(v),
+        };
+        let default_interval = match std::env::var("HAUNTER_DEFAULT_INTERVAL") {
+            Err(_) => Duration::new(15*60, 0),
+            Ok(v) => Duration::new(v.parse::<u64>().unwrap(), 0),
+        };
         return Conf {
-            job_dir: PathBuf::from_str("jobs.d").unwrap(),
-            output_dir: PathBuf::from_str("results.d").unwrap(),
-            check_interval: Duration::new(15*60, 0),
+            job_dir: default_job_dir,
+            output_dir: default_results_dir,
+            check_interval: default_interval,
             driver_url: default_driver_url,
         };
     }