mirror of
https://github.com/rubyjs/therubyracer
synced 2023-03-27 23:21:42 -04:00
205c52c5bf
move v8 src to google dir moving v8 source into main extension move google upstream source dir into v8 ext dir include v8 library in generated bundle prep for 0.4.7 roll the upstream build into the main extension build Documentation was confusing the gem packager. simplify build instructions with bundled v8. Only install scons and build v8 if it has not been built already. Missing CVS.py from the scons library due to ignore patterns. Don't need libv8 anymore, only python 2.5 which is required to build it.
381 lines
12 KiB
Python
381 lines
12 KiB
Python
"""SCons.SConsign
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Writing and reading information to the .sconsign file or files.
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"""
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#
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# Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 The SCons Foundation
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#
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# Permission is hereby granted, free of charge, to any person obtaining
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# a copy of this software and associated documentation files (the
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# "Software"), to deal in the Software without restriction, including
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# without limitation the rights to use, copy, modify, merge, publish,
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# distribute, sublicense, and/or sell copies of the Software, and to
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# permit persons to whom the Software is furnished to do so, subject to
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# the following conditions:
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#
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# The above copyright notice and this permission notice shall be included
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# in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
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# KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
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# WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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#
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__revision__ = "src/engine/SCons/SConsign.py 4629 2010/01/17 22:23:21 scons"
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import cPickle
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import os
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import os.path
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import SCons.dblite
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import SCons.Warnings
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def corrupt_dblite_warning(filename):
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SCons.Warnings.warn(SCons.Warnings.CorruptSConsignWarning,
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"Ignoring corrupt .sconsign file: %s"%filename)
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SCons.dblite.ignore_corrupt_dbfiles = 1
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SCons.dblite.corruption_warning = corrupt_dblite_warning
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#XXX Get rid of the global array so this becomes re-entrant.
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sig_files = []
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# Info for the database SConsign implementation (now the default):
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# "DataBase" is a dictionary that maps top-level SConstruct directories
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# to open database handles.
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# "DB_Module" is the Python database module to create the handles.
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# "DB_Name" is the base name of the database file (minus any
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# extension the underlying DB module will add).
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DataBase = {}
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DB_Module = SCons.dblite
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DB_Name = ".sconsign"
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DB_sync_list = []
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def Get_DataBase(dir):
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global DataBase, DB_Module, DB_Name
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top = dir.fs.Top
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if not os.path.isabs(DB_Name) and top.repositories:
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mode = "c"
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for d in [top] + top.repositories:
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if dir.is_under(d):
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try:
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return DataBase[d], mode
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except KeyError:
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path = d.entry_abspath(DB_Name)
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try: db = DataBase[d] = DB_Module.open(path, mode)
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except (IOError, OSError): pass
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else:
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if mode != "r":
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DB_sync_list.append(db)
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return db, mode
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mode = "r"
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try:
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return DataBase[top], "c"
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except KeyError:
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db = DataBase[top] = DB_Module.open(DB_Name, "c")
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DB_sync_list.append(db)
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return db, "c"
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except TypeError:
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print "DataBase =", DataBase
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raise
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def Reset():
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"""Reset global state. Used by unit tests that end up using
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SConsign multiple times to get a clean slate for each test."""
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global sig_files, DB_sync_list
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sig_files = []
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DB_sync_list = []
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normcase = os.path.normcase
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def write():
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global sig_files
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for sig_file in sig_files:
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sig_file.write(sync=0)
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for db in DB_sync_list:
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try:
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syncmethod = db.sync
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except AttributeError:
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pass # Not all anydbm modules have sync() methods.
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else:
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syncmethod()
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class SConsignEntry:
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"""
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Wrapper class for the generic entry in a .sconsign file.
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The Node subclass populates it with attributes as it pleases.
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XXX As coded below, we do expect a '.binfo' attribute to be added,
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but we'll probably generalize this in the next refactorings.
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"""
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current_version_id = 1
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def __init__(self):
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# Create an object attribute from the class attribute so it ends up
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# in the pickled data in the .sconsign file.
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_version_id = self.current_version_id
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def convert_to_sconsign(self):
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self.binfo.convert_to_sconsign()
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def convert_from_sconsign(self, dir, name):
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self.binfo.convert_from_sconsign(dir, name)
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class Base:
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"""
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This is the controlling class for the signatures for the collection of
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entries associated with a specific directory. The actual directory
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association will be maintained by a subclass that is specific to
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the underlying storage method. This class provides a common set of
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methods for fetching and storing the individual bits of information
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that make up signature entry.
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"""
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def __init__(self):
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self.entries = {}
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self.dirty = False
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self.to_be_merged = {}
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def get_entry(self, filename):
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"""
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Fetch the specified entry attribute.
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"""
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return self.entries[filename]
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def set_entry(self, filename, obj):
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"""
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Set the entry.
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"""
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self.entries[filename] = obj
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self.dirty = True
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def do_not_set_entry(self, filename, obj):
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pass
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def store_info(self, filename, node):
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entry = node.get_stored_info()
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entry.binfo.merge(node.get_binfo())
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self.to_be_merged[filename] = node
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self.dirty = True
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def do_not_store_info(self, filename, node):
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pass
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def merge(self):
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for key, node in self.to_be_merged.items():
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entry = node.get_stored_info()
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try:
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ninfo = entry.ninfo
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except AttributeError:
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# This happens with SConf Nodes, because the configuration
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# subsystem takes direct control over how the build decision
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# is made and its information stored.
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pass
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else:
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ninfo.merge(node.get_ninfo())
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self.entries[key] = entry
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self.to_be_merged = {}
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class DB(Base):
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"""
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A Base subclass that reads and writes signature information
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from a global .sconsign.db* file--the actual file suffix is
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determined by the database module.
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"""
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def __init__(self, dir):
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Base.__init__(self)
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self.dir = dir
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db, mode = Get_DataBase(dir)
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# Read using the path relative to the top of the Repository
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# (self.dir.tpath) from which we're fetching the signature
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# information.
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path = normcase(dir.tpath)
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try:
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rawentries = db[path]
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except KeyError:
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pass
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else:
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try:
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self.entries = cPickle.loads(rawentries)
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if type(self.entries) is not type({}):
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self.entries = {}
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raise TypeError
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except KeyboardInterrupt:
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raise
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except Exception, e:
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SCons.Warnings.warn(SCons.Warnings.CorruptSConsignWarning,
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"Ignoring corrupt sconsign entry : %s (%s)\n"%(self.dir.tpath, e))
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for key, entry in self.entries.items():
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entry.convert_from_sconsign(dir, key)
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if mode == "r":
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# This directory is actually under a repository, which means
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# likely they're reaching in directly for a dependency on
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# a file there. Don't actually set any entry info, so we
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# won't try to write to that .sconsign.dblite file.
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self.set_entry = self.do_not_set_entry
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self.store_info = self.do_not_store_info
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global sig_files
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sig_files.append(self)
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def write(self, sync=1):
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if not self.dirty:
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return
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self.merge()
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db, mode = Get_DataBase(self.dir)
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# Write using the path relative to the top of the SConstruct
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# directory (self.dir.path), not relative to the top of
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# the Repository; we only write to our own .sconsign file,
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# not to .sconsign files in Repositories.
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path = normcase(self.dir.path)
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for key, entry in self.entries.items():
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entry.convert_to_sconsign()
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db[path] = cPickle.dumps(self.entries, 1)
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if sync:
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try:
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syncmethod = db.sync
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except AttributeError:
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# Not all anydbm modules have sync() methods.
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pass
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else:
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syncmethod()
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class Dir(Base):
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def __init__(self, fp=None, dir=None):
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"""
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fp - file pointer to read entries from
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"""
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Base.__init__(self)
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if not fp:
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return
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self.entries = cPickle.load(fp)
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if type(self.entries) is not type({}):
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self.entries = {}
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raise TypeError
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if dir:
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for key, entry in self.entries.items():
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entry.convert_from_sconsign(dir, key)
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class DirFile(Dir):
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"""
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Encapsulates reading and writing a per-directory .sconsign file.
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"""
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def __init__(self, dir):
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"""
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dir - the directory for the file
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"""
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self.dir = dir
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self.sconsign = os.path.join(dir.path, '.sconsign')
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try:
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fp = open(self.sconsign, 'rb')
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except IOError:
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fp = None
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try:
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Dir.__init__(self, fp, dir)
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except KeyboardInterrupt:
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raise
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except:
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SCons.Warnings.warn(SCons.Warnings.CorruptSConsignWarning,
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"Ignoring corrupt .sconsign file: %s"%self.sconsign)
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global sig_files
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sig_files.append(self)
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def write(self, sync=1):
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"""
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Write the .sconsign file to disk.
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Try to write to a temporary file first, and rename it if we
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succeed. If we can't write to the temporary file, it's
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probably because the directory isn't writable (and if so,
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how did we build anything in this directory, anyway?), so
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try to write directly to the .sconsign file as a backup.
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If we can't rename, try to copy the temporary contents back
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to the .sconsign file. Either way, always try to remove
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the temporary file at the end.
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"""
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if not self.dirty:
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return
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self.merge()
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temp = os.path.join(self.dir.path, '.scons%d' % os.getpid())
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try:
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file = open(temp, 'wb')
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fname = temp
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except IOError:
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try:
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file = open(self.sconsign, 'wb')
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fname = self.sconsign
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except IOError:
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return
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for key, entry in self.entries.items():
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entry.convert_to_sconsign()
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cPickle.dump(self.entries, file, 1)
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file.close()
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if fname != self.sconsign:
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try:
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mode = os.stat(self.sconsign)[0]
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os.chmod(self.sconsign, 0666)
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os.unlink(self.sconsign)
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except (IOError, OSError):
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# Try to carry on in the face of either OSError
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# (things like permission issues) or IOError (disk
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# or network issues). If there's a really dangerous
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# issue, it should get re-raised by the calls below.
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pass
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try:
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os.rename(fname, self.sconsign)
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except OSError:
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# An OSError failure to rename may indicate something
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# like the directory has no write permission, but
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# the .sconsign file itself might still be writable,
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# so try writing on top of it directly. An IOError
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# here, or in any of the following calls, would get
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# raised, indicating something like a potentially
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# serious disk or network issue.
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open(self.sconsign, 'wb').write(open(fname, 'rb').read())
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os.chmod(self.sconsign, mode)
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try:
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os.unlink(temp)
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except (IOError, OSError):
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pass
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ForDirectory = DB
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def File(name, dbm_module=None):
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"""
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Arrange for all signatures to be stored in a global .sconsign.db*
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file.
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"""
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global ForDirectory, DB_Name, DB_Module
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if name is None:
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ForDirectory = DirFile
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DB_Module = None
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else:
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ForDirectory = DB
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DB_Name = name
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if not dbm_module is None:
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DB_Module = dbm_module
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# Local Variables:
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# tab-width:4
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# indent-tabs-mode:nil
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# End:
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# vim: set expandtab tabstop=4 shiftwidth=4:
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