From b02559fe6309b3fc36f3d688e44f65571474244c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=A9r=C3=A9my=20Thulliez?=
 <43185161+grzi@users.noreply.github.com>
Date: Fri, 6 Aug 2021 22:20:54 +0200
Subject: [PATCH] feat: Asset hot reload as a feature (#159)

---
 Cargo.toml                             |  1 +
 src/application.rs                     |  5 ++++-
 src/rendering/bidimensional/scion2d.rs | 14 ++++++++++----
 3 files changed, 15 insertions(+), 5 deletions(-)

diff --git a/Cargo.toml b/Cargo.toml
index 599d114..b313a82 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,6 +11,7 @@ license = "MIT OR Apache-2.0"
 
 [features]
 parallel = ["legion/parallel"]
+hot-reload = []
 
 [dependencies]
 legion = { version = "0.4", default-features = false, features = ["codegen"] }
diff --git a/src/application.rs b/src/application.rs
index 6e8acb3..d503f94 100644
--- a/src/application.rs
+++ b/src/application.rs
@@ -112,7 +112,10 @@ impl Scion {
             .expect("Error while creating topic for inputs event");
 
         let mut timers = Timers::default();
-        timers.add_timer("hot_reload", TimerType::Cyclic, 2.);
+
+        if cfg!(feature = "hot-reload") {
+            timers.add_timer("hot-reload-timer", TimerType::Cyclic, 5.);
+        }
 
         self.resources.insert(Time::default());
         self.resources.insert(events);
diff --git a/src/rendering/bidimensional/scion2d.rs b/src/rendering/bidimensional/scion2d.rs
index 01c7faf..de4ca48 100644
--- a/src/rendering/bidimensional/scion2d.rs
+++ b/src/rendering/bidimensional/scion2d.rs
@@ -22,6 +22,7 @@ use crate::{
         ScionRenderer,
     },
 };
+use std::cfg;
 use std::time::SystemTime;
 use crate::utils::file::{read_file_modification_time, FileReaderError};
 use crate::core::resources::time::Timers;
@@ -402,7 +403,7 @@ impl Scion2D {
     ) -> Vec<RenderingInfos> {
         let mut render_infos = Vec::new();
         for (entity, component, transform) in
-            <(Entity, &mut T, &Transform)>::query().iter_mut(world)
+        <(Entity, &mut T, &Transform)>::query().iter_mut(world)
         {
             render_infos.push(RenderingInfos {
                 layer: transform.translation().layer(),
@@ -482,9 +483,14 @@ impl Scion2D {
         device: &Device,
         queue: &mut Queue,
     ) {
-        let mut timers = resource.get_mut::<Timers>().expect("Missing mandatory resource : Timers");
-        let hot_reload_timer = timers.get_timer("hot_reload").expect("Missing mandatory timer : hot_reload");
-        let hot_timer_cycle = hot_reload_timer.cycle() > 0;
+        let hot_timer_cycle = if cfg!(feature = "hot-reload") {
+            let mut timers = resource.get_mut::<Timers>().expect("Missing mandatory resource : Timers");
+            let hot_reload_timer = timers.get_timer("hot-reload-timer").expect("Missing mandatory timer : hot_reload");
+            hot_reload_timer.cycle() > 0
+        } else {
+            false
+        };
+
 
         <(Entity, &Material)>::query().for_each(world, |(_entity, material)| {
             match material {