llvm-build: Sketch code to load LLVMBuild.txt files.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143621 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/llvm-build/llvmbuild/componentinfo.py b/utils/llvm-build/llvmbuild/componentinfo.py
new file mode 100644
index 0000000..a434bd8
--- /dev/null
+++ b/utils/llvm-build/llvmbuild/componentinfo.py
@@ -0,0 +1,134 @@
+"""
+Descriptor objects for entities that are part of the LLVM project.
+"""
+
+import ConfigParser
+import sys
+
+class ComponentInfo(object):
+ """
+ Base class for component descriptions.
+ """
+
+ type_name = None
+
+ 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'
+
+ def __init__(self, subpath, name, parent):
+ ComponentInfo.__init__(self, subpath, name, [], parent)
+
+class LibraryComponentInfo(ComponentInfo):
+ type_name = 'Library'
+
+ def __init__(self, subpath, name, dependencies, parent, library_name = None,
+ 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'
+
+ 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'
+
+ 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'
+
+_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.
+ print >>sys.stderr, "warning: ignoring unknown section %r in %r" % (
+ section, path)
+ continue
+
+ # Load the component that this section describes. For now we just do
+ # this the trivial way by letting python validate the argument
+ # assignment. This is simple, but means users see lame diagnostics. We
+ # should audit the component manually, eventually.
+ if not parser.has_option(section, 'type'):
+ print >>sys.stderr, "error: invalid component %r in %r: %s" % (
+ section, path, "no component type")
+ raise SystemExit, 1
+
+ type_name = parser.get(section, 'type')
+ type_class = _component_type_map.get(type_name)
+ if type_class is None:
+ print >>sys.stderr, "error: invalid component %r in %r: %s" % (
+ section, path, "invalid component type: %r" % type_name)
+ raise SystemExit, 1
+
+ items = dict(parser.items(section))
+ items['subpath'] = subpath
+ items.pop('type')
+
+ # Instantiate the component based on the remaining values.
+ try:
+ info = type_class(**items)
+ 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
+
+ yield info