From 5d5f3c724435592c3f839642c3fc149f42f81102 Mon Sep 17 00:00:00 2001
From: Bill Thiede <git@xinu.tv>
Date: Sat, 12 Oct 2019 20:42:41 -0700
Subject: [PATCH] Lint cleanup when prometheus not enabled.

---
 rtiow/src/bin/tracer.rs | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/rtiow/src/bin/tracer.rs b/rtiow/src/bin/tracer.rs
index 06a8045..a862134 100644
--- a/rtiow/src/bin/tracer.rs
+++ b/rtiow/src/bin/tracer.rs
@@ -8,13 +8,13 @@ extern crate rtiow;
 extern crate stderrlog;
 extern crate structopt;
 #[macro_use]
+#[cfg(feature = "prom")]
 extern crate lazy_static;
 #[macro_use]
 #[cfg(feature = "prom")]
 extern crate prometheus;
 
 use std::fs;
-use std::time::Instant;
 
 use chrono::DateTime;
 use chrono::Utc;
@@ -46,7 +46,7 @@ fn push_metrics(_push_gateway_addr: &str, _instance: String, start_time: &DateTi
 
 #[cfg(feature = "prom")]
 fn push_metrics(push_gateway_addr: &str, instance: String, start_time: &DateTime<Utc>) {
-    let runtime = start_instant.elapsed();
+    let runtime = (Utc::now() - *start_time).to_std().unwrap();
     info!(
         "Render time {}.{} seconds",
         runtime.as_secs(),
@@ -117,7 +117,6 @@ fn main() -> Result<(), std::io::Error> {
         .init()
         .unwrap();
     let start_time: DateTime<Utc> = Utc::now();
-    let start_instant = Instant::now();
     let opt = Opt::from_args();
     let scene = opt.model.scene(&opt);
     fs::create_dir_all(&opt.output)?;