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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
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utils/llvm-build/llvmbuild/componentinfo.py
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134
utils/llvm-build/llvmbuild/componentinfo.py
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"""
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Descriptor objects for entities that are part of the LLVM project.
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"""
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import ConfigParser
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import sys
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class ComponentInfo(object):
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"""
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Base class for component descriptions.
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"""
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type_name = None
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def __init__(self, subpath, name, dependencies, parent):
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if not subpath.startswith('/'):
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raise ValueError,"invalid subpath: %r" % subpath
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self.subpath = subpath
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self.name = name
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self.dependencies = list(dependencies)
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# The name of the parent component to logically group this component
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# under.
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self.parent = parent
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class GroupComponentInfo(ComponentInfo):
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"""
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Group components have no semantics as far as the build system are concerned,
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but exist to help organize other components into a logical tree structure.
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"""
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type_name = 'Group'
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def __init__(self, subpath, name, parent):
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ComponentInfo.__init__(self, subpath, name, [], parent)
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class LibraryComponentInfo(ComponentInfo):
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type_name = 'Library'
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def __init__(self, subpath, name, dependencies, parent, library_name = None,
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required_libraries = [], add_to_library_groups = []):
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ComponentInfo.__init__(self, subpath, name, dependencies, parent)
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# If given, the name to use for the library instead of deriving it from
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# the component name.
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self.library_name = library_name
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# The names of the library components which are required when linking
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# with this component.
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self.required_libraries = list(required_libraries)
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# The names of the library group components this component should be
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# considered part of.
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self.add_to_library_groups = list(add_to_library_groups)
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class LibraryGroupComponentInfo(ComponentInfo):
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type_name = 'LibraryGroup'
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def __init__(self, subpath, name, parent, required_libraries = [],
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add_to_library_groups = []):
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ComponentInfo.__init__(self, subpath, name, [], parent)
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# The names of the library components which are required when linking
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# with this component.
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self.required_libraries = list(required_libraries)
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# The names of the library group components this component should be
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# considered part of.
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self.add_to_library_groups = list(add_to_library_groups)
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class ToolComponentInfo(ComponentInfo):
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type_name = 'Tool'
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def __init__(self, subpath, name, dependencies, parent,
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required_libraries = []):
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ComponentInfo.__init__(self, subpath, name, dependencies, parent)
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# The names of the library components which are required to link this
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# tool.
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self.required_libraries = list(required_libraries)
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class BuildToolComponentInfo(ToolComponentInfo):
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type_name = 'BuildTool'
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_component_type_map = dict(
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(t.type_name, t)
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for t in (GroupComponentInfo,
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LibraryComponentInfo, LibraryGroupComponentInfo,
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ToolComponentInfo, BuildToolComponentInfo))
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def load_from_path(path, subpath):
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# Load the LLVMBuild.txt file as an .ini format file.
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parser = ConfigParser.RawConfigParser()
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parser.read(path)
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# We load each section which starts with 'component' as a distinct component
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# description (so multiple components can be described in one file).
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for section in parser.sections():
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if not section.startswith('component'):
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# We don't expect arbitrary sections currently, warn the user.
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print >>sys.stderr, "warning: ignoring unknown section %r in %r" % (
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section, path)
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continue
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# Load the component that this section describes. For now we just do
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# this the trivial way by letting python validate the argument
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# assignment. This is simple, but means users see lame diagnostics. We
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# should audit the component manually, eventually.
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if not parser.has_option(section, 'type'):
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print >>sys.stderr, "error: invalid component %r in %r: %s" % (
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section, path, "no component type")
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raise SystemExit, 1
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type_name = parser.get(section, 'type')
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type_class = _component_type_map.get(type_name)
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if type_class is None:
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print >>sys.stderr, "error: invalid component %r in %r: %s" % (
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section, path, "invalid component type: %r" % type_name)
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raise SystemExit, 1
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items = dict(parser.items(section))
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items['subpath'] = subpath
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items.pop('type')
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# Instantiate the component based on the remaining values.
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try:
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info = type_class(**items)
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except TypeError:
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print >>sys.stderr, "error: invalid component %r in %r: %s" % (
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section, path, "unable to instantiate: %r" % type_name)
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import traceback
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traceback.print_exc()
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raise SystemExit, 1
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yield info
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@ -1,11 +1,53 @@
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import pprint
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import os
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import os
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import componentinfo
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class LLVMProjectInfo(object):
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@staticmethod
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def load_infos_from_path(llvmbuild_source_root):
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# FIXME: Implement a simple subpath file list cache, so we don't restat
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# directories we have already traversed.
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# First, discover all the LLVMBuild.txt files.
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for dirpath,dirnames,filenames in os.walk(llvmbuild_source_root,
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followlinks = True):
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# If there is no LLVMBuild.txt file in a directory, we don't recurse
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# past it. This is a simple way to prune our search, although it
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# makes it easy for users to add LLVMBuild.txt files in places they
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# won't be seen.
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if 'LLVMBuild.txt' not in filenames:
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del dirnames[:]
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continue
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# Otherwise, load the LLVMBuild file in this directory.
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assert dirpath.startswith(llvmbuild_source_root)
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subpath = '/' + dirpath[len(llvmbuild_source_root)+1:]
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llvmbuild_path = os.path.join(dirpath, 'LLVMBuild.txt')
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for info in componentinfo.load_from_path(llvmbuild_path, subpath):
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yield info
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@staticmethod
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def load_from_path(source_root, llvmbuild_source_root):
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infos = list(
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LLVMProjectInfo.load_infos_from_path(llvmbuild_source_root))
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return LLVMProjectInfo(source_root, infos)
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def __init__(self, source_root, component_infos):
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self.source_root = source_root
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self.component_infos = component_infos
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def main():
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def main():
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from optparse import OptionParser, OptionGroup
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from optparse import OptionParser, OptionGroup
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parser = OptionParser("usage: %prog [options]")
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parser = OptionParser("usage: %prog [options]")
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parser.add_option("", "--source-root", dest="source_root", metavar="PATH",
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parser.add_option("", "--source-root", dest="source_root", metavar="PATH",
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help="Path to the LLVM source (inferred if not given)",
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help="Path to the LLVM source (inferred if not given)",
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action="store", default=None)
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action="store", default=None)
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parser.add_option(
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"", "--llvmbuild-source-root", dest="llvmbuild_source_root",
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help="If given, an alternate path to search for LLVMBuild.txt files",
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action="store", default=None, metavar="PATH")
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(opts, args) = parser.parse_args()
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(opts, args) = parser.parse_args()
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# Determine the LLVM source path, if not given.
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# Determine the LLVM source path, if not given.
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'Function.cpp')):
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'Function.cpp')):
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parser.error('unable to infer LLVM source root, please specify')
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parser.error('unable to infer LLVM source root, please specify')
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# Construct the LLVM project information.
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llvmbuild_source_root = opts.llvmbuild_source_root or source_root
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project_info = LLVMProjectInfo.load_from_path(
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source_root, llvmbuild_source_root)
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if __name__=='__main__':
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if __name__=='__main__':
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main()
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main()
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