def _load_extension(name):
"""Load symbols from file or obtain from loaded cache."""
full_path = _expand_include_path(name)
if full_path in __loaded_extension_info:
return __loaded_extension_info[full_path]
if not os.path.isfile(full_path):
console.diagnose(_current_source_location(), 'error',
'File "%s" does not exist' % name)
return {}
# The symbols in the current context should be invisible to the extension,
# make an isolated symbol set to implement this approach.
origin_globals = build_rules.get_all()
extension_globals = origin_globals.copy()
exec_file(full_path, extension_globals, None)
# Extract new symbols
result = {}
for symbol, value in extension_globals.items():
if symbol.startswith('_'):
continue
if symbol in origin_globals and value is origin_globals[symbol]:
continue
if isinstance(value, types.ModuleType):
continue
result[symbol] = value
__loaded_extension_info[full_path] = result
return result
def __load_build_file(source_dir, blade):
"""
Load and execute the BUILD file, which is a Python script, in source_dir.
Statements in BUILD depends on global variable current_source_dir, and will
register build target/rules into global variables target_database.
Report error and exit if path/BUILD does NOT exist.
"""
if not os.path.isdir(source_dir):
_report_not_exist('Directory', source_dir, source_dir, blade)
return False
old_current_source_path = blade.get_current_source_path()
try:
blade.set_current_source_path(source_dir)
build_file = os.path.join(source_dir, 'BUILD')
if os.path.isfile(build_file):
try:
# The magic here is that a BUILD file is a Python script,
# which can be loaded and executed by execfile().
global __current_globals
__current_globals = build_rules.get_all()
exec_file(build_file, __current_globals, None)
return True
except SystemExit:
console.fatal('%s: Fatal error' % build_file)
except: # pylint: disable=bare-except
console.fatal('Parse error in %s\n%s' %
(build_file, traceback.format_exc()))
else:
_report_not_exist('File', build_file, source_dir, blade)
finally:
blade.set_current_source_path(old_current_source_path)
return False
def include(name):
"""Include another file into current BUILD file"""
full_path = _expand_include_path(name)
if not os.path.isfile(full_path):
console.diagnose(_current_source_location(), 'error',
'File "%s" does not exist' % name)
return
exec_file(full_path, __current_globals, None)
def include(name):
from blade import build_manager # pylint: disable=import-outside-toplevel
if name.startswith('//'):
dir = build_manager.instance.get_root_dir()
name = name[2:]
else:
dir = build_manager.instance.get_current_source_path()
exec_file(os.path.join(dir, name), __current_globles, None)
def _load_build_file(source_dir, processed_source_dirs, blade):
"""Load the BUILD and place the targets into database.
Invoked by _load_targets. Load and execute the BUILD
file, which is a Python script, in source_dir. Statements in BUILD
depends on global variable current_source_dir, and will register build
target/rules into global variables target_database. Report error
and exit if path/BUILD does NOT exist.
The parameters processed_source_dirs refers to a set defined in the
caller and used to avoid duplicated execution of BUILD files.
"""
source_dir = os.path.normpath(source_dir)
# TODO(yiwang): the character '#' is a magic value.
if source_dir in processed_source_dirs or source_dir == '#':
return
processed_source_dirs.add(source_dir)
if not os.path.exists(source_dir):
_report_not_exist('Directory', source_dir, source_dir, blade)
return
old_current_source_path = blade.get_current_source_path()
try:
blade.set_current_source_path(source_dir)
build_file = os.path.join(source_dir, 'BUILD')
if os.path.exists(build_file) and not os.path.isdir(build_file):
try:
# The magic here is that a BUILD file is a Python script,
# which can be loaded and executed by execfile().
global __current_globles
__current_globles = build_rules.get_all()
exec_file(build_file, __current_globles, None)
except SystemExit:
console.fatal('%s: Fatal error' % build_file)
except: # pylint: disable=bare-except
console.fatal('Parse error in %s\n%s' % (
build_file, traceback.format_exc()))
else:
_report_not_exist('File', build_file, source_dir, blade)
finally:
blade.set_current_source_path(old_current_source_path)
def _load_extension(name):
"""Load symbols from file or obtain from loaded cache."""
full_path = _expand_include_path(name)
if full_path in __loaded_extension_info:
return __loaded_extension_info[full_path]
# The symbols in the current context should be invisible to the extension,
# make an isolated symbol set to implement this approach.
origin_globals = build_rules.get_all()
extension_globals = origin_globals.copy()
exec_file(full_path, extension_globals, None)
# Extract new symbols
result = {}
for symbol, value in extension_globals.items():
if symbol.startswith('_'):
continue
if symbol in origin_globals and value is origin_globals[symbol]:
continue
if type(value) is types.ModuleType:
continue
result[symbol] = value
__loaded_extension_info[full_path] = result
return result
def include(name):
"""Include another file into current BUILD file"""
exec_file(_expand_include_path(name), __current_globals, None)