SPEC-7135 Provide a method to re-trigger compiler detection for changes that require it (#1092)

* SPEC-7135 Provide a method to re-trigger compiler detection for changes that require it

* removing check (is wrong and is not necessary)

* Invert existance check

* add empty lines at the end

* Clean is triggering on each build

* clearing if the variable is false

* test code to understand what is going on...

* yeap, looks good

* handling "false" in linux/mac

* fix for linux/mac

* Fixing typos

scripts/build/Platform/Windows/build_windows.cmd

@@ -13,6 +13,7 @@ REM
 SETLOCAL EnableDelayedExpansion
 
 CALL %~dp0env_windows.cmd
+CALL %~dp0clean_windows.cmd
 
 IF NOT EXIST "%OUTPUT_DIRECTORY%" (
     MKDIR %OUTPUT_DIRECTORY%.
@@ -70,4 +71,4 @@ EXIT /b 0
 
 :error
 POPD
-EXIT /b 1
+EXIT /b 1

scripts/build/Platform/Windows/clean_windows.cmd

@@ -12,6 +12,16 @@ REM
 
 SETLOCAL EnableDelayedExpansion
 
+REM Jenkins defines environment variables for parameters and passes "false" to variables 
+REM that are not set. Here we clear them if they are false so we can also just define them
+REM from command line
+IF "%CLEAN_ASSETS%"=="false" (
+    set CLEAN_ASSETS=
+)
+IF "%CLEAN_OUTPUT_DIRECTORY%"=="false" (
+    set CLEAN_OUTPUT_DIRECTORY=
+)
+
 IF DEFINED CLEAN_ASSETS (
     ECHO [ci_build] CLEAN_ASSETS option set
     FOR %%P in (%CMAKE_LY_PROJECTS%) do (
@@ -19,7 +29,26 @@ IF DEFINED CLEAN_ASSETS (
             ECHO [ci_build] Deleting "%%P\Cache"
             DEL /s /q /f %%P\Cache 1>nul
         )
-    )    
+    )
+)
+
+REM If the node label changes, we issue a clean output since node changes can change SDK/CMake/toolchains/etc
+SET LAST_CONFIGURE_NODE_LABEL_FILE=ci_last_node_label.txt
+IF DEFINED NODE_LABEL (
+    IF EXIST %OUTPUT_DIRECTORY% (
+        PUSHD %OUTPUT_DIRECTORY%
+        IF EXIST !LAST_CONFIGURE_NODE_LABEL_FILE! (
+            FOR /F "delims=" %%x in (%LAST_CONFIGURE_NODE_LABEL_FILE%) DO SET LAST_NODE_LABEL=%%x
+        ) ELSE (
+            SET LAST_NODE_LABEL=
+        )
+        REM Detect if the node label has changed
+        IF !LAST_NODE_LABEL! NEQ !NODE_LABEL! (
+            ECHO [ci_build] Last run was done with node label "!LAST_NODE_LABEL!", new node label is "!NODE_LABEL!", forcing CLEAN_OUTPUT_DIRECTORY
+            SET CLEAN_OUTPUT_DIRECTORY=1
+        )
+        POPD
+    )
 )
 
 IF DEFINED CLEAN_OUTPUT_DIRECTORY (
@@ -28,4 +57,12 @@ IF DEFINED CLEAN_OUTPUT_DIRECTORY (
         ECHO [ci_build] Deleting "%OUTPUT_DIRECTORY%"
         DEL /s /q /f %OUTPUT_DIRECTORY% 1>nul
     )
-)
+)
+
+IF NOT EXIST "%OUTPUT_DIRECTORY%" (
+    MKDIR %OUTPUT_DIRECTORY%.
+)
+REM Save the node label
+PUSHD %OUTPUT_DIRECTORY%
+ECHO !NODE_LABEL!> !LAST_CONFIGURE_NODE_LABEL_FILE!
+POPD