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

@@ -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]
 )

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)

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)))

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)
     {

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;
-}

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)