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"""
Descriptor objects for entities that are part of the LLVM project.
"""
import ConfigParser
import sys
from util import *
class ParseError(Exception):
pass
class ComponentInfo(object):
"""
Base class for component descriptions.
"""
type_name = None
@staticmethod
def parse_items(items, has_dependencies = True):
kwargs = {}
kwargs['name'] = items.get_string('name')
kwargs['parent'] = items.get_optional_string('parent')
if has_dependencies:
kwargs['dependencies'] = items.get_list('dependencies')
return kwargs
def __init__(self, subpath, name, dependencies, parent):
if not subpath.startswith('/'):
raise ValueError,"invalid subpath: %r" % subpath
self.subpath = subpath
self.name = name
self.dependencies = list(dependencies)
# The name of the parent component to logically group this component
# under.
self.parent = parent
class GroupComponentInfo(ComponentInfo):
"""
Group components have no semantics as far as the build system are concerned,
but exist to help organize other components into a logical tree structure.
"""
type_name = 'Group'
@staticmethod
def parse(subpath, items):
kwargs = ComponentInfo.parse_items(items, has_dependencies = False)
return GroupComponentInfo(subpath, **kwargs)
def __init__(self, subpath, name, parent):
ComponentInfo.__init__(self, subpath, name, [], parent)
class LibraryComponentInfo(ComponentInfo):
type_name = 'Library'
@staticmethod
def parse(subpath, items):
kwargs = ComponentInfo.parse_items(items)
kwargs['library_name'] = items.get_optional_string('name')
kwargs['required_libraries'] = items.get_list('required_libraries')
kwargs['add_to_library_groups'] = items.get_list(
'add_to_library_groups')
return LibraryComponentInfo(subpath, **kwargs)
def __init__(self, subpath, name, dependencies, parent, library_name,
required_libraries, add_to_library_groups):
ComponentInfo.__init__(self, subpath, name, dependencies, parent)
# If given, the name to use for the library instead of deriving it from
# the component name.
self.library_name = library_name
# The names of the library components which are required when linking
# with this component.
self.required_libraries = list(required_libraries)
# The names of the library group components this component should be
# considered part of.
self.add_to_library_groups = list(add_to_library_groups)
class LibraryGroupComponentInfo(ComponentInfo):
type_name = 'LibraryGroup'
@staticmethod
def parse(subpath, items):
kwargs = ComponentInfo.parse_items(items, has_dependencies = False)
kwargs['required_libraries'] = items.get_list('required_libraries')
kwargs['add_to_library_groups'] = items.get_list(
'add_to_library_groups')
return LibraryGroupComponentInfo(subpath, **kwargs)
def __init__(self, subpath, name, parent, required_libraries = [],
add_to_library_groups = []):
ComponentInfo.__init__(self, subpath, name, [], parent)
# The names of the library components which are required when linking
# with this component.
self.required_libraries = list(required_libraries)
# The names of the library group components this component should be
# considered part of.
self.add_to_library_groups = list(add_to_library_groups)
class ToolComponentInfo(ComponentInfo):
type_name = 'Tool'
@staticmethod
def parse(subpath, items):
kwargs = ComponentInfo.parse_items(items)
kwargs['required_libraries'] = items.get_list('required_libraries')
return ToolComponentInfo(subpath, **kwargs)
def __init__(self, subpath, name, dependencies, parent,
required_libraries):
ComponentInfo.__init__(self, subpath, name, dependencies, parent)
# The names of the library components which are required to link this
# tool.
self.required_libraries = list(required_libraries)
class BuildToolComponentInfo(ToolComponentInfo):
type_name = 'BuildTool'
@staticmethod
def parse(subpath, items):
kwargs = ComponentInfo.parse_items(items)
kwargs['required_libraries'] = items.get_list('required_libraries')
return BuildToolComponentInfo(subpath, **kwargs)
###
class IniFormatParser(dict):
def get_list(self, key):
# Check if the value is defined.
value = self.get(key)
if value is None:
return []
# Lists are just whitespace separated strings.
return value.split()
def get_optional_string(self, key):
value = self.get_list(key)
if not value:
return None
if len(value) > 1:
raise ParseError("multiple values for scalar key: %r" % key)
return value[0]
def get_string(self, key):
value = self.get_optional_string(key)
if not value:
raise ParseError("missing value for required string: %r" % key)
return value
_component_type_map = dict(
(t.type_name, t)
for t in (GroupComponentInfo,
LibraryComponentInfo, LibraryGroupComponentInfo,
ToolComponentInfo, BuildToolComponentInfo))
def load_from_path(path, subpath):
# Load the LLVMBuild.txt file as an .ini format file.
parser = ConfigParser.RawConfigParser()
parser.read(path)
# We load each section which starts with 'component' as a distinct component
# description (so multiple components can be described in one file).
for section in parser.sections():
if not section.startswith('component'):
# We don't expect arbitrary sections currently, warn the user.
warning("ignoring unknown section %r in %r" % (section, path))
continue
# Determine the type of the component to instantiate.
if not parser.has_option(section, 'type'):
fatal("invalid component %r in %r: %s" % (
section, path, "no component type"))
type_name = parser.get(section, 'type')
type_class = _component_type_map.get(type_name)
if type_class is None:
fatal("invalid component %r in %r: %s" % (
section, path, "invalid component type: %r" % type_name))
# Instantiate the component based on the remaining values.
try:
info = type_class.parse(subpath,
IniFormatParser(parser.items(section)))
except TypeError:
print >>sys.stderr, "error: invalid component %r in %r: %s" % (
section, path, "unable to instantiate: %r" % type_name)
import traceback
traceback.print_exc()
raise SystemExit, 1
except ParseError,e:
fatal("unable to load component %r in %r: %s" % (
section, path, e.message))
yield info
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