compiler: support console programs

This makes it possible to build normal console programs in Uno, using
"static int Main(string[] args)" entrypoints (return type and args are
optional), just like in C#.

* Set "outputType" to "console" (unoproj) to create a console program
* Supported by dotnet and native build targets

Author: mortend

README.md

@@ -57,11 +57,11 @@ Uno is used on Linux, macOS and Windows, and makes native apps for the following
 ### Uno syntax
 
 ```uno
-class App : Uno.Application
+class Program
 {
-    public App()
+    static void Main()
     {
-        debug_log "Hello, world!";
+        debug_log "Hello, World!";
     }
 }
 ```

lib/UnoCore/UnoCore.unoproj

@@ -91,7 +91,11 @@
     "cil/mac-loader.stuff:stuff",
     "cil/run.bat:file",
     "cil/run.sh:file",
+    "cil/test.cil.uxl:extensions",
     "cpp/config.cpp.uxl:extensions",
+    "cpp/main-app.cpp:file",
+    "cpp/main-console.cpp:file",
+    "cpp/main-mobile.cpp:file",
     "cpp/uno.cpp.uxl:extensions",
     "cpp/uno.h:file",
     "cpp/Uno/_config.h:file",
@@ -110,8 +114,6 @@
     "cpp/Uno/Support.h:file",
     "cpp/Uno/SupportApple.mm:file",
     "cpp/Uno/Uno.h:file",
-    "cpp/uPlatform/_main.cpp:file",
-    "cpp/uPlatform/_mainMobile.cpp:file",
     "cpp/uPlatform/GLHelper.h:file",
     "cpp/uPlatform/GraphicsContext.h:file",
     "cpp/uPlatform/WinAPIHelper.h:file",

lib/UnoCore/cil/app.cil.uxl

@@ -1,4 +1,4 @@
-<Extensions Backend="CIL" Condition="!LIBRARY && !TEST">
+<Extensions Backend="CIL" Condition="!CONSOLE && !LIBRARY && !TEST">
 
     <Set AppDirectory="@(Project.Name).app" Condition="HOST_MAC" />
     <Set AssemblyDirectory="@(HOST_MAC:Defined:Test('@(AppDirectory)/Contents/MonoBundle', '.'))" />

lib/UnoCore/cil/console.cil.uxl

@@ -1,13 +1,9 @@
-<Extensions Backend="CIL" Condition="!LIBRARY && TEST">
-
-    <Set AppLoader.Assembly="@(Config.AppLoader.Console:Path)/uno-app.dll" />
-    <Set AppLoader.Class="Uno.AppLoader.Program" />
-    <Set AppLoader.Method="UnoGenerated" />
+<Extensions Backend="CIL" Condition="CONSOLE">
 
     <CopyFile Name="@(Config.AppLoader.Console:Path)/uno-app.runtimeconfig.json"
-        TargetName="@(Project.Name).exe.runtimeconfig.json" />
+        TargetName="@(Project.Name).runtimeconfig.json" />
 
-    <Set Product="@(Project.Name).exe.dll" />
+    <Set Product="@(Project.Name).dll" />
 
     <!-- Windows -->
     <Set Commands.Run="run.bat" Condition="HOST_WIN32" />

lib/UnoCore/cil/mac-loader.stuff

@@ -1,3 +1,3 @@
-if DOTNET && !LIBRARY && HOST_MAC && HOST_X64 {
+if DOTNET && HOST_MAC && HOST_X64 && !CONSOLE && !LIBRARY && !TEST {
     "mac-x64": "https://www.nuget.org/api/v2/package/uno-mac-loader-x64/3.0.0-beta.0"
 }

lib/UnoCore/cil/test.cil.uxl

@@ -0,0 +1,20 @@
+<Extensions Backend="CIL" Condition="TEST">
+
+    <Set AppLoader.Assembly="@(Config.AppLoader.Console:Path)/uno-app.dll" />
+    <Set AppLoader.Class="Uno.AppLoader.Program" />
+    <Set AppLoader.Method="UnoGenerated" />
+
+    <CopyFile Name="@(Config.AppLoader.Console:Path)/uno-app.runtimeconfig.json"
+        TargetName="@(Project.Name).exe.runtimeconfig.json" />
+
+    <Set Product="@(Project.Name).exe.dll" />
+
+    <!-- Windows -->
+    <Set Commands.Run="run.bat" Condition="HOST_WIN32" />
+    <ProcessFile Name="run.bat" Condition="HOST_WIN32" />
+
+    <!-- UNIX -->
+    <Set Commands.Run="run.sh" Condition="HOST_UNIX" />
+    <ProcessFile Name="run.sh" Condition="HOST_UNIX" IsExecutable="true" />
+
+</Extensions>

lib/UnoCore/cpp/uPlatform/_main.cpp renamed to lib/UnoCore/cpp/main-app.cpp

@@ -0,0 +1,28 @@
+// @(MSG_ORIGIN)
+// @(MSG_EDIT_WARNING)
+
+#include <Uno/ObjectModel.h>
+@(Main.IncludeDirective)
+@(TypeObjects.Declaration:JoinSorted())
+void uInitRtti(uType*(*factories[])());
+
+// See @{Uno.Environment.GetCommandLineArgs():Call()}
+int uArgc = 0;
+char** uArgv = nullptr;
+
+int main(int argc, char* argv[])
+{
+    uArgc = argc;
+    uArgv = argv;
+
+    uRuntime uno;
+    uAutoReleasePool pool;
+
+    uType* (*factories[])() = {
+        @(TypeObjects.FunctionPointer:JoinSorted('\n        ', '', ','))
+        nullptr
+    };
+
+    uInitRtti(factories);
+    return @(Main.Entrypoint);
+}

lib/UnoCore/cpp/main-console.cpp

@@ -18,12 +18,16 @@
     <ProcessFile SourceFile="Uno/Reflection.cpp" Condition="REFLECTION" />
     <ProcessFile HeaderFile="Uno/Reflection.h" Condition="REFLECTION" />
 
-    <ProcessFile SourceFile="uPlatform/_main.cpp" Condition="!MOBILE"/>
-    <ProcessFile SourceFile="uPlatform/_mainMobile.cpp" Condition="MOBILE" />
+    <!-- Platform headers -->
     <ProcessFile HeaderFile="uPlatform/GraphicsContext.h" Condition="!MOBILE" />
     <ProcessFile HeaderFile="uPlatform/GLHelper.h" Condition="OPENGL" />
     <ProcessFile HeaderFile="uPlatform/WinAPIHelper.h" Condition="WIN32" />
 
+    <!-- Entrypoint -->
+    <ProcessFile SourceFile="main-app.cpp" Condition="!MOBILE && !CONSOLE"/>
+    <ProcessFile SourceFile="main-console.cpp" Condition="!MOBILE && CONSOLE"/>
+    <ProcessFile SourceFile="main-mobile.cpp" Condition="MOBILE" />
+
     <!-- Deprecated headers -->
     <ProcessFile HeaderFile="Uno/Graphics/GLHelper.h" Condition="ANDROID" />
     <ProcessFile HeaderFile="Uno/Uno.h" Condition="APPLE" />