[lldb] [lit] Do not run Python tests w/ LLDB_DISABLE_PYTHON

[mgorny]

Summary

Skip all Python-based tests as unsupported when LLDB_DISABLE_PYTHON is
enabled. Otherwise, those tests simply fail being unable to import lldb
module.

[labath]

Makes sense to me.

lit/CMakeLists.txt

 if(BUILD_SHARED_LIBS)
   set(ENABLE_SHARED 1)
 else()
   set(ENABLE_SHARED 0)
 endif(BUILD_SHARED_LIBS)
 
 # the value is not canonicalized within LLVM
 llvm_canonicalize_cmake_booleans(
+  LLDB_DISABLE_PYTHON
   LLVM_ENABLE_ZLIB)
 
 configure_lit_site_cfg(
   ${CMAKE_CURRENT_SOURCE_DIR}/lit.site.cfg.in
   ${CMAKE_CURRENT_BINARY_DIR}/lit.site.cfg)
 configure_lit_site_cfg(
   ${CMAKE_CURRENT_SOURCE_DIR}/Unit/lit.site.cfg.in
   ${CMAKE_CURRENT_BINARY_DIR}/Unit/lit.site.cfg)

lit/Suite/lit.site.cfg.in

 @LIT_SITE_CFG_IN_HEADER@
 
 config.test_exec_root = "@LLVM_BINARY_DIR@"
 config.llvm_src_root = "@LLVM_SOURCE_DIR@"
 config.llvm_obj_root = "@LLVM_BINARY_DIR@"
 config.llvm_tools_dir = "@LLVM_TOOLS_DIR@"
 config.llvm_libs_dir = "@LLVM_LIBS_DIR@"
 config.llvm_build_mode = "@LLVM_BUILD_MODE@"
 config.lit_tools_dir = "@LLVM_LIT_TOOLS_DIR@"
 config.lldb_obj_root = "@LLDB_BINARY_DIR@"
 config.lldb_src_root = "@LLDB_SOURCE_DIR@"
 config.target_triple = "@TARGET_TRIPLE@"
 config.python_executable = "@PYTHON_EXECUTABLE@"
 config.dotest_path = "@LLDB_SOURCE_DIR@/test/dotest.py"
 config.dotest_args_str = "@LLDB_DOTEST_ARGS@"
+config.lldb_disable_python = @LLDB_DISABLE_PYTHON@
 
 
 # Additional dotest arguments can be passed to lit by providing a
 # semicolon-separates list: --param dotest-args="arg;arg".
 dotest_lit_args_str = lit_config.params.get('dotest-args', None)
 if dotest_lit_args_str:
     config.dotest_args_str += ';'
     config.dotest_args_str += dotest_lit_args_str

lit/Suite/lldbtest.py

def getTestsInDirectory(self, testSuite, path_in_suite, litConfig,
                 if ext in localConfig.suffixes:
                     yield lit.Test.Test(testSuite, path_in_suite +
                                         (filename, ), localConfig)
 
     def execute(self, test, litConfig):
         if litConfig.noExecute:
             return lit.Test.PASS, ''
 
+        if test.config.lldb_disable_python:
+            return (lit.Test.UNSUPPORTED, 'Python module disabled')
+
         if test.config.unsupported:
             return (lit.Test.UNSUPPORTED, 'Test is unsupported')
 
         testPath, testFile = os.path.split(test.getSourcePath())
         # On Windows, the system does not always correctly interpret shebang lines.
         # To make sure we can execute the tests, add python exe as the first parameter
         # of the command.
         cmd = [sys.executable] + self.dotest_cmd + [testPath, '-p', testFile]