From a66f19190edc499494a903bdc4a6b58760ca110c Mon Sep 17 00:00:00 2001
From: Tomas <tomas@lesbian.ddns.net>
Date: Thu, 27 Nov 2025 00:44:48 +0100
Subject: [PATCH] Increased build speed

Instead of recompiling all of lunch source for each game, we generate
source files containing the `main` function and default configuration
for every game instead.
---
 config/template.build          |  4 ++--
 meson.build                    |  3 ++-
 prebuild.py                    | 14 ++++++++++++++
 source/lunch/{main.d => app.d} | 11 +++++++----
 source/lunch/conf.d            | 11 +----------
 source/lunch/launch.d          |  3 ++-
 6 files changed, 28 insertions(+), 18 deletions(-)
 rename source/lunch/{main.d => app.d} (91%)

diff --git a/config/template.build b/config/template.build
index 0541e9e..8f5f801 100644
--- a/config/template.build
+++ b/config/template.build
@@ -1,7 +1,7 @@
 exec = executable(
     '$name',
-    lunch_src + windows.compile_resources(files('resource.rc')),
+    files('main.d') + windows.compile_resources(files('resource.rc')),
     include_directories: includes,
     d_import_dirs: ['.'],
-    link_with: [lua, luad, toml]
+    link_with: [lunch, lua, luad, toml]
 )
\ No newline at end of file
diff --git a/meson.build b/meson.build
index 30b16c0..c59925a 100644
--- a/meson.build
+++ b/meson.build
@@ -6,12 +6,12 @@ python3 = find_program('python3')
 
 
 lunch_src = files(
+    'source/lunch/app.d',
     'source/lunch/color.d',
     'source/lunch/conf.d',
     'source/lunch/http.d',
     'source/lunch/launch.d',
     'source/lunch/logger.d',
-    'source/lunch/main.d',
     'source/lunch/ui.d',
     'source/lunch/update.d',
 )
@@ -89,6 +89,7 @@ source = d_source + c_source
 
 includes = include_directories('source')
 
+lunch = static_library('lunch', lunch_src, include_directories: includes)
 toml = static_library('toml', toml_src, include_directories: includes)
 luad = static_library('luad', luad_src, include_directories: includes)
 lua  = static_library('lua',  lua_src,  include_directories: includes)
diff --git a/prebuild.py b/prebuild.py
index 857d6da..4e1d9d0 100644
--- a/prebuild.py
+++ b/prebuild.py
@@ -108,6 +108,20 @@ for dirent in os.listdir("config"):
             "ICON\tICON\t\"icon.ico\""
         ])
 
+    # Generate source file
+    with open(pjoin(opath, "main.d"), "w") as file:
+        file.writelines([
+            "module main;\n",
+            "\n",
+            "import lunch.app;\n",
+            "\n",
+            "\n",
+            "void main()\n",
+            "{\n",
+            "    app(import(\"config.toml\"));\n",
+            "}\n",
+        ])
+
     # Generate meson file
     with open(pjoin(opath, "meson.build"), "w") as file:
         file.write(meson_template.substitute(dict(flat_config)))
diff --git a/source/lunch/main.d b/source/lunch/app.d
similarity index 91%
rename from source/lunch/main.d
rename to source/lunch/app.d
index 89c1a2b..1798009 100644
--- a/source/lunch/main.d
+++ b/source/lunch/app.d
@@ -14,8 +14,11 @@ import lunch.update;
 import lunch.launch;;
 
 
-void app()
+void _app(string config_toml)
 {
+    // Load default config
+    wrapTOML(cast()config, config_toml.parseTOML());
+
     // Focus on exe
     chdir( thisExePath.dirName() );
 
@@ -64,7 +67,7 @@ void app()
 
         if (config.ui.config_dump)
         {
-            options ~= () { writeFile(config.app.config_name, default_config_toml); };
+            options ~= () { writeFile(config.app.config_name, config_toml); };
             writefln("[%d] %s", options.length, config.ui.config_dump_label);
         }
 
@@ -93,11 +96,11 @@ void app()
 }
 
 
-void main()
+void app(string config_toml)
 {
     try
     {
-        app();
+        _app(config_toml);
     }
     catch (Exception ex)
     {
diff --git a/source/lunch/conf.d b/source/lunch/conf.d
index 9f3146f..4b959e7 100644
--- a/source/lunch/conf.d
+++ b/source/lunch/conf.d
@@ -71,9 +71,7 @@ struct Config
 }
 
 
-immutable string default_config_toml = import("config.toml");
-immutable Config default_config;
-immutable Config config;
+shared Config config;
 
 
 private string dash2minus(string str)
@@ -149,10 +147,3 @@ Config parseConfig(string toml) @safe
     wrapTOML(config, doc);
     return config;
 }
-
-
-shared static this()
-{
-    default_config = cast(immutable)parseConfig(default_config_toml);
-    config = default_config;
-}
diff --git a/source/lunch/launch.d b/source/lunch/launch.d
index 8c7c424..57d63d9 100644
--- a/source/lunch/launch.d
+++ b/source/lunch/launch.d
@@ -10,6 +10,7 @@ import lunch.logger;
 
 version (Windows)
 {
+    pragma(lib, "User32");
     import core.sys.windows.windows;
 }
 
@@ -75,7 +76,7 @@ void launch()
         try
         {
             chdir(config.launcher.workdir);
-            Pid pid = spawnProcess(config.launcher.command);
+            Pid pid = spawnProcess(config.launcher.command.dup);
             wait(pid);
         }
         catch (Exception ex)