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# Copyright 2013 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
import collections
import os
try:
from six import StringIO
except ImportError:
from io import StringIO
from py_vulcanize import resource_loader
import six
def _FindAllFilesRecursive(source_paths):
all_filenames = set()
for source_path in source_paths:
for dirpath, _, filenames in os.walk(source_path):
for f in filenames:
if f.startswith('.'):
continue
x = os.path.abspath(os.path.join(dirpath, f))
all_filenames.add(x)
return all_filenames
class AbsFilenameList(object):
def __init__(self, willDirtyCallback):
self._willDirtyCallback = willDirtyCallback
self._filenames = []
self._filenames_set = set()
def _WillBecomeDirty(self):
if self._willDirtyCallback:
self._willDirtyCallback()
def append(self, filename):
assert os.path.isabs(filename)
self._WillBecomeDirty()
self._filenames.append(filename)
self._filenames_set.add(filename)
def extend(self, iterable):
self._WillBecomeDirty()
for filename in iterable:
assert os.path.isabs(filename)
self._filenames.append(filename)
self._filenames_set.add(filename)
def appendRel(self, basedir, filename):
assert os.path.isabs(basedir)
self._WillBecomeDirty()
n = os.path.abspath(os.path.join(basedir, filename))
self._filenames.append(n)
self._filenames_set.add(n)
def extendRel(self, basedir, iterable):
self._WillBecomeDirty()
assert os.path.isabs(basedir)
for filename in iterable:
n = os.path.abspath(os.path.join(basedir, filename))
self._filenames.append(n)
self._filenames_set.add(n)
def __contains__(self, x):
return x in self._filenames_set
def __len__(self):
return self._filenames.__len__()
def __iter__(self):
return iter(self._filenames)
def __repr__(self):
return repr(self._filenames)
def __str__(self):
return str(self._filenames)
class Project(object):
py_vulcanize_path = os.path.abspath(os.path.join(
os.path.dirname(__file__), '..'))
def __init__(self, source_paths=None):
"""
source_paths: A list of top-level directories in which modules and raw
scripts can be found. Module paths are relative to these directories.
"""
self._loader = None
self._frozen = False
self.source_paths = AbsFilenameList(self._WillPartOfPathChange)
if source_paths is not None:
self.source_paths.extend(source_paths)
def Freeze(self):
self._frozen = True
def _WillPartOfPathChange(self):
if self._frozen:
raise Exception('The project is frozen. You cannot edit it now')
self._loader = None
@staticmethod
def FromDict(d):
return Project(d['source_paths'])
def AsDict(self):
return {
'source_paths': list(self.source_paths)
}
def __repr__(self):
return "Project(%s)" % repr(self.source_paths)
def AddSourcePath(self, path):
self.source_paths.append(path)
@property
def loader(self):
if self._loader is None:
self._loader = resource_loader.ResourceLoader(self)
return self._loader
def ResetLoader(self):
self._loader = None
def _Load(self, filenames):
return [self.loader.LoadModule(module_filename=filename) for
filename in filenames]
def LoadModule(self, module_name=None, module_filename=None):
return self.loader.LoadModule(module_name=module_name,
module_filename=module_filename)
def CalcLoadSequenceForModuleNames(self, module_names,
excluded_scripts=None):
modules = [self.loader.LoadModule(module_name=name,
excluded_scripts=excluded_scripts) for
name in module_names]
return self.CalcLoadSequenceForModules(modules)
def CalcLoadSequenceForModules(self, modules):
already_loaded_set = set()
load_sequence = []
for m in modules:
m.ComputeLoadSequenceRecursive(load_sequence, already_loaded_set)
return load_sequence
def GetDepsGraphFromModuleNames(self, module_names):
modules = [self.loader.LoadModule(module_name=name) for
name in module_names]
return self.GetDepsGraphFromModules(modules)
def GetDepsGraphFromModules(self, modules):
load_sequence = self.CalcLoadSequenceForModules(modules)
g = _Graph()
for m in load_sequence:
g.AddModule(m)
for dep in m.dependent_modules:
g.AddEdge(m, dep.id)
# FIXME: _GetGraph is not defined. Maybe `return g` is intended?
return _GetGraph(load_sequence)
def GetDominatorGraphForModulesNamed(self, module_names, load_sequence):
modules = [self.loader.LoadModule(module_name=name)
for name in module_names]
return self.GetDominatorGraphForModules(modules, load_sequence)
def GetDominatorGraphForModules(self, start_modules, load_sequence):
modules_by_id = {}
for m in load_sequence:
modules_by_id[m.id] = m
module_referrers = collections.defaultdict(list)
for m in load_sequence:
for dep in m.dependent_modules:
module_referrers[dep].append(m)
# Now start at the top module and reverse.
visited = set()
g = _Graph()
pending = collections.deque()
pending.extend(start_modules)
while len(pending):
cur = pending.pop()
g.AddModule(cur)
visited.add(cur)
for out_dep in module_referrers[cur]:
if out_dep in visited:
continue
g.AddEdge(out_dep, cur)
visited.add(out_dep)
pending.append(out_dep)
# Visited -> Dot
return g.GetDot()
class _Graph(object):
def __init__(self):
self.nodes = []
self.edges = []
def AddModule(self, m):
f = StringIO()
m.AppendJSContentsToFile(f, False, None)
attrs = {
'label': '%s (%i)' % (m.name, f.tell())
}
f.close()
attr_items = ['%s="%s"' % (x, y) for x, y in six.iteritems(attrs)]
node = 'M%i [%s];' % (m.id, ','.join(attr_items))
self.nodes.append(node)
def AddEdge(self, mFrom, mTo):
edge = 'M%i -> M%i;' % (mFrom.id, mTo.id)
self.edges.append(edge)
def GetDot(self):
return 'digraph deps {\n\n%s\n\n%s\n}\n' % (
'\n'.join(self.nodes), '\n'.join(self.edges))
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