Buildscript support for coreclr runtime and classlibrary building (#3)

* Calling build.cmd would exit early it appears so needed to call build.ps1 directly instead to keep the artifact copying.

* Build script updates

* Trigger current yamato targets on PRs so at least something runs :-)
* Add classlib building. Currently leverages perl but not enthusiastic about it.

* Switching from perl to batch script to build the classlibs

* PR feedback: Use a function for echoing system calls

Author: UnityAlex

.yamato/build_classlibs_win.yml

@@ -0,0 +1,20 @@
+name: Build Classlibs Windows
+
+agent:
+  type: Unity::VM
+  image: platform-foundation/windows-vs2019-il2cpp-bokken:stable
+  flavor: b1.xlarge
+
+commands:
+  - .yamato/scripts/build_classlibs.bat
+
+triggers:
+  pull_requests:
+    - targets:
+        only:
+          - "unity-main"
+
+artifacts: 
+  win64:
+    paths:
+      - incomingbuilds\**

.yamato/build_windows_x64.yml

@@ -8,6 +8,12 @@ agent:
 commands:
   - .yamato/scripts/build_win.bat
 
+triggers:
+  pull_requests:
+    - targets:
+        only:
+          - "unity-main"
+
 artifacts: 
   win64:
     paths:

.yamato/scripts/build_classlibs.bat

@@ -0,0 +1,22 @@
+@echo OFF
+
+if not exist "incomingbuilds" mkdir "incomingbuilds"
+
+for %%x IN ("windows", "OSX", "Linux") do (
+    CALL :EchoAndExecute build.cmd libs -os %%x -c release
+    if NOT %errorlevel% == 0 (
+        echo "build failed"
+        EXIT /B %errorlevel%
+    )
+    if not exist "incomingbuilds/coreclrjit-%%x" mkdir "incomingbuilds/coreclrjit-%%x"
+
+    CALL :EchoAndExecute xcopy /s /e /h /y "artifacts/bin/runtime/net7.0-%%x-Release-x64" "incomingbuilds/coreclrjit-%%x"
+    CALL :EchoAndExecute taskkill /IM "dotnet.exe" /F
+    CALL :EchoAndExecute build.cmd -clean
+)
+EXIT /B %ERRORLEVEL%
+
+:EchoAndExecute
+ECHO %*
+CALL %*
+GOTO :EOF