From b7aa658e5012eadd7142ea5b48fbc7d4394320d1 Mon Sep 17 00:00:00 2001
From: klemek <klemek.dev@proton.me>
Date: Fri, 12 Sep 2025 22:40:00 +0200
Subject: [PATCH] hot reload argument

---
 Makefile.dev |  2 +-
 README.md    |  7 ++++---
 src/args.c   | 12 ++++++++----
 src/forge.c  |  2 +-
 src/types.h  |  1 +
 5 files changed, 15 insertions(+), 9 deletions(-)

diff --git a/Makefile.dev b/Makefile.dev
index 0c1d5a4..c47d0d1 100644
--- a/Makefile.dev
+++ b/Makefile.dev
@@ -12,7 +12,7 @@ build:
 	gcc -Wall -Wextra src/*.c src/*.h -lglfw -lGL -lm -Iinclude -ldl -o build/$(TARGET)
 
 run: build
-	./build/forge --frag=./shaders/frag.glsl
+	./build/forge --hot-reload --frag=./shaders/frag.glsl
 
 .PHONY: install
 install: build
diff --git a/README.md b/README.md
index a03b8c7..3c141f2 100644
--- a/README.md
+++ b/README.md
@@ -48,13 +48,14 @@ make install
 ## CLI arguments
 
 ```txt
-usage: forge [--help] [-v]
+usage: forge [-h] [-v] [-hr] [-s=SCREEN] [-f=FRAG_PATH] 
 
 Fusion Of Real-time Generative Effects.
 
 options:
-  --help             show this help message and exit
+  -h, --help         show this help message and exit
   -v, --version      print version
+  -hr, --hot-reload  hot reload of shaders scripts
   -s, --screen       output screen number (default: primary)
   -f, --frag         fragment shader path (default: TODO)
 ```
@@ -90,7 +91,7 @@ make -f Makefile.dev release-arch
   - [x] Read fragment shader from file
   - [ ] Handle compilation errors
   - [x] Minimal working fragment sample
-  - [x] Hot-reload fragment shader
+  - [x] Hot-reload fragment shader (with arg)
   - [x] Specify fragment shader path
   - [x] Force fullscreen
   - [x] Select screen as argument / config
diff --git a/src/args.c b/src/args.c
index e903fce..d7a5ec2 100644
--- a/src/args.c
+++ b/src/args.c
@@ -9,15 +9,17 @@
 void print_help(int status_code) {
   puts(PACKAGE " " VERSION "\n\n"
                "usage: " PACKAGE " "
-               "[--help] "
+               "[-h] "
                "[-v] "
+               "[-hr] "
                "[-s=SCREEN] "
                "[-f=FRAG_PATH] "
                "\n\n"
                "Fusion Of Real-time Generative Effects.\n\n"
                "options:\n"
-               "  --help             show this help message and exit\n"
+               "  -h, --help         show this help message and exit\n"
                "  -v, --version      print version\n"
+               "  -hr, --hot-reload  hot reload of shaders scripts\n"
                "  -s, --screen       output screen number (default: primary)\n"
                "  -f, --frag         fragment shader path (default: TODO)\n");
   exit(status_code);
@@ -68,7 +70,7 @@ unsigned char parse_uchar(char *arg, char *value) {
 }
 
 Parameters parse_args(int argc, char **argv) {
-  Parameters params = {0, 0};
+  Parameters params = {0, 0, false};
 
   int i;
   char *arg;
@@ -76,11 +78,13 @@ Parameters parse_args(int argc, char **argv) {
   for (i = 1; i < argc; i++) {
     arg = argv[i];
     value = split_arg_value(arg);
-    if (is_arg(arg, "--help")) {
+    if (is_arg(arg, "-h") || is_arg(arg, "--help")) {
       print_help(EXIT_SUCCESS);
     } else if (is_arg(arg, "-v") || is_arg(arg, "--version")) {
       puts(PACKAGE " " VERSION);
       exit(EXIT_SUCCESS);
+    } else if (is_arg(arg, "-hr") || is_arg(arg, "--hot-reload")) {
+      params.hot_reload = true;
     } else if (is_arg(arg, "-s") || is_arg(arg, "--screen")) {
       params.screen = parse_uchar(arg, value);
     } else if (is_arg(arg, "-f") || is_arg(arg, "--frag")) {
diff --git a/src/forge.c b/src/forge.c
index 5e3f427..829506f 100644
--- a/src/forge.c
+++ b/src/forge.c
@@ -199,7 +199,7 @@ void forge_run(Parameters params) {
   }
 
   while (!glfwWindowShouldClose(window)) {
-    if (should_update_file(&fragment_shader)) {
+    if (params.hot_reload && should_update_file(&fragment_shader)) {
       update_file(&fragment_shader);
       update_program(program, fragment_shader);
     }
diff --git a/src/types.h b/src/types.h
index 96ee2d0..20bd51f 100644
--- a/src/types.h
+++ b/src/types.h
@@ -10,6 +10,7 @@
 typedef struct Parameters {
   unsigned char screen;
   char *frag_path;
+  bool hot_reload;
 } Parameters;
 
 typedef struct Vertex {