mirror of
https://github.com/kennethreitz-archive/pyinstaller.git
synced 2026-06-05 23:50:17 +00:00
giovannibajo
52a51e0bb1
git-svn-id: http://svn.pyinstaller.org/trunk@6 8dd32b29-ccff-0310-8a9a-9233e24343b1
392 lines
14 KiB
Python
392 lines
14 KiB
Python
#
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# Gordon McMillan (as inspired and influenced by Greg Stein)
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#
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# subclasses may not need marshal or struct, but since they're
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# builtin, importing is safe.
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#
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# While an Archive is really an abstraction for any "filesystem
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# within a file", it is tuned for use with imputil.FuncImporter.
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# This assumes it contains python code objects, indexed by the
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# the internal name (ie, no '.py').
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# See carchive.py for a more general archive (contains anything)
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# that can be understood by a C program.
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_verbose = 0
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_listdir = None
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_environ = None
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import marshal
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import struct
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import imp
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import sys
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import string
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_c_suffixes = filter(lambda x: x[2] == imp.C_EXTENSION, imp.get_suffixes())
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for nm in ('nt', 'posix', 'dos', 'os2', 'mac'):
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if nm in sys.builtin_module_names:
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mod = __import__(nm)
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_listdir = mod.listdir
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_environ = mod.environ
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break
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if hasattr(sys, 'version_info'):
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versuffix = '%d%d'%(sys.version_info[0],sys.version_info[1])
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else:
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vers = sys.version
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dot1 = dot2 = 0
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for i in range(len(vers)):
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if vers[i] == '.':
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if dot1:
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dot2 = i
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break
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else:
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dot1 = i
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else:
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dot2 = len(vers)
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versuffix = '%s%s' % (vers[:dot1], vers[dot1+1:dot2])
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if "-vi" in sys.argv[1:]:
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_verbose = 1
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class Archive:
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""" A base class for a repository of python code objects.
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The extract method is used by imputil.ArchiveImporter
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to get code objects by name (fully qualified name), so
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an enduser "import a.b" would become
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extract('a.__init__')
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extract('a.b')
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"""
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MAGIC = 'PYL\0'
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HDRLEN = 12 # default is MAGIC followed by python's magic, int pos of toc
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TOCPOS = 8
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TRLLEN = 0 # default - no trailer
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TOCTMPLT = {} #
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os = None
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_bincache = None
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def __init__(self, path=None, start=0):
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"Initialize an Archive. If path is omitted, it will be an empty Archive."
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self.toc = None
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self.path = path
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self.start = start
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import imp
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self.pymagic = imp.get_magic()
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if path is not None:
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self.lib = open(self.path, 'rb')
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self.checkmagic()
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self.loadtoc()
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####### Sub-methods of __init__ - override as needed #############
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def checkmagic(self):
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""" Overridable.
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Check to see if the file object self.lib actually has a file
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we understand.
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"""
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self.lib.seek(self.start) #default - magic is at start of file
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if self.lib.read(len(self.MAGIC)) != self.MAGIC:
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raise RuntimeError, "%s is not a valid %s archive file" \
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% (self.path, self.__class__.__name__)
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if self.lib.read(len(self.pymagic)) != self.pymagic:
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raise RuntimeError, "%s has version mismatch to dll" % (self.path)
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self.lib.read(4)
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def loadtoc(self):
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""" Overridable.
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Default: After magic comes an int (4 byte native) giving the
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position of the TOC within self.lib.
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Default: The TOC is a marshal-able string.
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"""
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self.lib.seek(self.start + self.TOCPOS)
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(offset,) = struct.unpack('=i', self.lib.read(4))
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self.lib.seek(self.start + offset)
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self.toc = marshal.load(self.lib)
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######## This is what is called by FuncImporter #######
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## Since an Archive is flat, we ignore parent and modname.
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#XXX obsolete - imputil only code
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## def get_code(self, parent, modname, fqname):
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#### if _verbose:
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#### print "I: get_code(%s, %s, %s, %s)" % (self, parent, modname, fqname)
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## iname = fqname
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## if parent:
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## iname = '%s.%s' % (parent.__dict__.get('__iname__', parent.__name__), modname)
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#### if _verbose:
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#### print "I: get_code: iname is %s" % iname
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## rslt = self.extract(iname) # None if not found, (ispkg, code) otherwise
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#### if _verbose:
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#### print 'I: get_code: rslt', rslt
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## if rslt is None:
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#### if _verbose:
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#### print 'I: get_code: importer', getattr(parent, "__importer__", None),'self',self
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## # check the cache if there is no parent or self is the parents importer
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## if parent is None or getattr(parent, "__importer__", None) is self:
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#### if _verbose:
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#### print 'I: get_code: cached 1',iname
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## file, desc = Archive._bincache.get(iname, (None, None))
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#### if _verbose:
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#### print 'I: get_code: file',file,'desc',desc
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## if file:
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## try:
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## fp = open(file, desc[1])
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## except IOError:
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## pass
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## else:
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## module = imp.load_module(fqname, fp, file, desc)
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## if _verbose:
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## print "I: import %s found %s" % (fqname, file)
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## return 0, module, {'__file__':file}
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## if _verbose:
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## print "I: import %s failed" % fqname
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##
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## return None
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##
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## ispkg, code = rslt
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## values = {'__file__' : code.co_filename, '__iname__' : iname}
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## if ispkg:
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## values['__path__'] = [fqname]
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## if _verbose:
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## print "I: import %s found %s" % (fqname, iname)
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## return ispkg, code, values
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####### Core method - Override as needed #########
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def extract(self, name):
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""" Get the object corresponding to name, or None.
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For use with imputil ArchiveImporter, object is a python code object.
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'name' is the name as specified in an 'import name'.
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'import a.b' will become:
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extract('a') (return None because 'a' is not a code object)
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extract('a.__init__') (return a code object)
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extract('a.b') (return a code object)
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Default implementation:
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self.toc is a dict
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self.toc[name] is pos
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self.lib has the code object marshal-ed at pos
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"""
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ispkg, pos = self.toc.get(name, (0,None))
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if pos is None:
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return None
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self.lib.seek(self.start + pos)
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return ispkg, marshal.load(self.lib)
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########################################################################
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# Informational methods
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def contents(self):
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"""Return a list of the contents
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Default implementation assumes self.toc is a dict like object.
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Not required by ArchiveImporter.
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"""
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return self.toc.keys()
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########################################################################
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# Building
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####### Top level method - shouldn't need overriding #######
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def build(self, path, lTOC):
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"""Create an archive file of name 'path'.
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lTOC is a 'logical TOC' - a list of (name, path, ...)
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where name is the internal name, eg 'a'
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and path is a file to get the object from, eg './a.pyc'.
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"""
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self.path = path
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self.lib = open(path, 'wb')
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#reserve space for the header
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if self.HDRLEN:
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self.lib.write('\0'*self.HDRLEN)
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#create an empty toc
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if type(self.TOCTMPLT) == type({}):
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self.toc = {}
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else: # assume callable
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self.toc = self.TOCTMPLT()
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for tocentry in lTOC:
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self.add(tocentry) # the guts of the archive
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tocpos = self.lib.tell()
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self.save_toc(tocpos)
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if self.TRLLEN:
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self.save_trailer(tocpos)
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if self.HDRLEN:
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self.update_headers(tocpos)
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self.lib.close()
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####### manages keeping the internal TOC and the guts in sync #######
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def add(self, entry):
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"""Override this to influence the mechanics of the Archive.
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Assumes entry is a seq beginning with (nm, pth, ...) where
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nm is the key by which we'll be asked for the object.
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pth is the name of where we find the object. Overrides of
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get_obj_from can make use of further elements in entry.
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"""
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if self.os is None:
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import os
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self.os = os
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nm = entry[0]
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pth = entry[1]
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pynm, ext = self.os.path.splitext(self.os.path.basename(pth))
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ispkg = pynm == '__init__'
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assert ext in ('.pyc', '.pyo')
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self.toc[nm] = (ispkg, self.lib.tell())
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f = open(entry[1], 'rb')
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f.seek(8) #skip magic and timestamp
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self.lib.write(f.read())
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def save_toc(self, tocpos):
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"""Default - toc is a dict
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Gets marshaled to self.lib
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"""
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marshal.dump(self.toc, self.lib)
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def save_trailer(self, tocpos):
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"""Default - not used"""
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pass
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def update_headers(self, tocpos):
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"""Default - MAGIC + Python's magic + tocpos"""
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self.lib.seek(self.start)
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self.lib.write(self.MAGIC)
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self.lib.write(self.pymagic)
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self.lib.write(struct.pack('=i', tocpos))
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class DummyZlib:
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def decompress(self, data):
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return data
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def compress(self, data, lvl):
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return data
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import iu
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##############################################################
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#
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# ZlibArchive - an archive with compressed entries
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#
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class ZlibArchive(Archive):
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MAGIC = 'PYZ\0'
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TOCPOS = 8
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HDRLEN = 16
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TRLLEN = 0
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TOCTMPLT = {}
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LEVEL = 9
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def __init__(self, path=None, offset=None, level=9):
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if path is None:
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offset = 0
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elif offset is None:
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for i in range(len(path)-1, -1, -1):
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if path[i] == '?':
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offset = int(path[i+1:])
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path = path[:i]
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break
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else:
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offset = 0
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self.LEVEL = level
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Archive.__init__(self, path, offset)
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# dynamic import so not imported if not needed
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global zlib
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if self.LEVEL:
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try:
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import zlib
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except ImportError:
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zlib = DummyZlib()
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else:
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zlib = DummyZlib()
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def extract(self, name):
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(ispkg, pos, lngth) = self.toc.get(name, (0, None, 0))
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if pos is None:
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return None
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self.lib.seek(self.start + pos)
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try:
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co = marshal.loads(zlib.decompress(self.lib.read(lngth)))
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except EOFError:
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raise ImportError, "PYZ entry '%s' failed to unmarshal" % name
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return ispkg, co
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def add(self, entry):
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if self.os is None:
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import os
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self.os = os
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nm = entry[0]
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pth = entry[1]
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base, ext = self.os.path.splitext(self.os.path.basename(pth))
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ispkg = base == '__init__'
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try:
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txt = open(pth[:-1], 'r').read()+'\n'
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except (IOError, OSError):
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try:
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f = open(pth, 'rb')
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f.seek(8) #skip magic and timestamp
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bytecode = f.read()
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marshal.loads(bytecode).co_filename # to make sure it's valid
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obj = zlib.compress(bytecode, self.LEVEL)
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except (IOError, ValueError, EOFError, AttributeError):
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raise ValueError("bad bytecode in %s and no source" % pth)
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else:
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txt = string.join(string.split(txt, '\r\n'), '\n')
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try:
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co = compile(txt, "%s/%s" % (self.path, nm), 'exec')
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except SyntaxError, e:
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print "Syntax error in", pth[:-1]
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print e.args
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raise
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obj = zlib.compress(marshal.dumps(co), self.LEVEL)
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self.toc[nm] = (ispkg, self.lib.tell(), len(obj))
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self.lib.write(obj)
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def update_headers(self, tocpos):
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"""add level"""
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Archive.update_headers(self, tocpos)
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self.lib.write(struct.pack('!i', self.LEVEL))
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def checkmagic(self):
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Archive.checkmagic(self)
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self.LEVEL = struct.unpack('!i', self.lib.read(4))[0]
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class PYZOwner(iu.Owner):
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def __init__(self, path):
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self.pyz = ZlibArchive(path)
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iu.Owner.__init__(self, path)
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def getmod(self, nm, newmod=imp.new_module):
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rslt = self.pyz.extract(nm)
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if rslt is None:
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return None
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ispkg, co = rslt
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mod = newmod(nm)
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try:
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mod.__file__ = co.co_filename
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except AttributeError:
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raise ImportError, "PYZ entry '%s' (%s) is not a valid code object" % (nm, repr(co))
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if ispkg:
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if _environ.has_key('_MEIPASS2'):
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localpath = _environ['_MEIPASS2'][:-1]
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else:
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localpath = iu._os_path_dirname(self.path)
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mod.__path__ = [self.path, localpath, iu._os_path_dirname(mod.__file__)]
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#print "PYZOwner setting %s's __path__: %s" % (nm, mod.__path__)
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importer = iu.PathImportDirector(mod.__path__,
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{self.path:PkgInPYZImporter(nm, self),
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localpath:ExtInPkgImporter(localpath, nm)},
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[iu.DirOwner])
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mod.__importsub__ = importer.getmod
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mod.__co__ = co
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return mod
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class PkgInPYZImporter:
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def __init__(self, name, owner):
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self.name = name
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self.owner = owner
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def getmod(self, nm):
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#print "PkgInPYZImporter.getmod %s -> %s" % (nm, self.name+'.'+nm)
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return self.owner.getmod(self.name+'.'+nm)
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class ExtInPkgImporter(iu.DirOwner):
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def __init__(self, path, prefix):
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iu.DirOwner.__init__(self, path)
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self.prefix = prefix
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def getmod(self, nm):
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return iu.DirOwner.getmod(self, self.prefix+'.'+nm)
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#XXX this should also get moved out
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##iu._globalownertypes.insert(0, PYZOwner)
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##iu.ImportManager().install()
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