build: add a testclean target

This commit adds a target named testclean to allow for cleaning the
temporary files generated during a test run without having to use the
clean target.

PR-URL: #29094
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>

Makefile

@@ -170,12 +170,16 @@ clean: ## Remove build artifacts.
 	$(RM) -r node_modules
 	@if [ -d deps/icu ]; then echo deleting deps/icu; $(RM) -r deps/icu; fi
 	$(RM) test.tap
-	# Next one is legacy remove this at some point
-	$(RM) -r test/tmp*
-	$(RM) -r test/.tmp*
+	$(MAKE) testclean
 	$(MAKE) test-addons-clean
 	$(MAKE) bench-addons-clean
 
+.PHONY: testclean
+testclean:
+# Next one is legacy remove this at some point
+	$(RM) -r test/tmp*
+	$(RM) -r test/.tmp*
+
 .PHONY: distclean
 distclean:
 	$(RM) -r out

vcbuild.bat

@@ -69,6 +69,7 @@ if "%1"=="" goto args-done
 if /i "%1"=="debug"         set config=Debug&goto arg-ok
 if /i "%1"=="release"       set config=Release&set ltcg=1&set cctest=1&goto arg-ok
 if /i "%1"=="clean"         set target=Clean&goto arg-ok
+if /i "%1"=="testclean"     set target=TestClean&goto arg-ok
 if /i "%1"=="ia32"          set target_arch=x86&goto arg-ok
 if /i "%1"=="x86"           set target_arch=x86&goto arg-ok
 if /i "%1"=="x64"           set target_arch=x64&goto arg-ok
@@ -200,6 +201,13 @@ if "%target%"=="Clean" echo deleting %~dp0deps\icu
 if "%target%"=="Clean" rmdir /S /Q %~dp0deps\icu
 :no-depsicu
 
+if "%target%"=="TestClean" (
+  echo deleting test/.tmp*
+  if exist "test\.tmp*" for /f %%i in ('dir /a:d /s /b test\.tmp*') do rmdir /S /Q "%%i"
+  goto exit
+)
+
+
 call tools\msvs\find_python.cmd
 if errorlevel 1 goto :exit