improved logging and error handling

scripts/run_buildkite.bat

@@ -12,6 +12,16 @@ rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 rem See the License for the specific language governing permissions and
 rem limitations under the License.
 
+echo "--- CMake"
 call %~dp0\run_cmake.bat
+if %errorlevel% neq 0 exit /b %errorlevel%
+
+echo "--- ninja all"
 call %~dp0\run_ninja.bat all
+if %errorlevel% neq 0 exit /b %errorlevel%
+
+echo "--- ninja check-all"
 call %~dp0\run_ninja.bat check-all
+if %errorlevel% neq 0 exit /b %errorlevel%
+
+echo "--- done"

scripts/run_cmake.bat

@@ -25,6 +25,8 @@ cmake.exe ..\llvm -G Ninja -DCMAKE_BUILD_TYPE=Release ^
     -DLLVM_LIT_ARGS="-v --xunit-xml-output test-results.xml" ^
     -D LLVM_ENABLE_DIA_SDK=OFF
 
+if %errorlevel% neq 0 exit /b %errorlevel%
+
 rem LLVM_ENABLE_DIA_SDK=OFF is a workaround to make the tests pass.
 rem see https://bugs.llvm.org/show_bug.cgi?id=44151
 

scripts/run_ninja.bat

@@ -19,4 +19,6 @@ cd build
 call "C:\Program Files (x86)\Microsoft Visual Studio\2017\BuildTools\Common7\Tools\VsDevCmd.bat" -arch=amd64 -host_arch=amd64
 
 ninja %1
+if %errorlevel% neq 0 exit /b %errorlevel%
+
 POPD