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# $Id$
# coding=utf-8
#
# Copyright Š 2009 Bruce Frederiksen
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
"""
Each target_pkg object keeps track of all of the compiled files within one
compiled_krb package.
"""
from __future__ import with_statement
import os, os.path
import time
import sys
import re
import pyke
debug = False
Name_test = re.compile(r'[a-zA-Z_][a-zA-Z0-9_]*$')
class target_pkg(object):
r'''This manages all of the target files in a compiled_krb directory.
There is one instance per compiled_krb directory. It keeps track of
everything in that directory and manages recompiling the sources when
the compiled targets are missing or out of date.
This instance is stored permanently in the "targets" variable of the
compiled_pyke_files.py module in the compiled_krb directory.
This maintains the following information for each compiled target file:
source_package, source_filepath, compile_time, target_filename.
'''
def __init__(self, module_name, filename = None,
pyke_version = pyke.version,
loader = None, sources = None, compiler_version = 0):
r'''
The parameters are:
module_name: the complete dotted name of the compiled_pyke_files
module for this object.
filename: the absolute path to the compiled_pyke_files.py/c/o
file.
pyke_version: the version of pyke used to compile the target files.
loader: the __loader__ attribute of the compiled_pyke_files
module (only set if the compiled_krb directory has
been zipped, otherwise None).
sources: {(source_package_name, path_from_package,
source_filepath):
[compile_time, target_file...]}
compiler_version:
the version of the pyke compiler used to compile all
of the targets in this compiled_krb directory.
This class is instantiated in two different circumstances:
1. From compiled_krb/compiled_pyke_files.py with a list of all of the
compiled files in that compiled_krb directory.
In this case, all of the parameters are passed to __init__.
2. From knowledge_engine.engine.__init__ (actually _create_target_pkg).
In this case, only the first parameter is passed to __init__.
Either way, after importing compiled_pyke_files or creating a new
instance directly, reset is called by
knowledge_engine.engine._create_target_pkg.
'''
# compiled_krb package name
self.package_name = module_name.rsplit('.', 1)[0]
if sources is None:
# compiled_pyke_files.py does not exist.
# Creating a new target_pkg object from scratch.
try:
# See if the self.package_name (e.g., compiled_krb) exists.
target_package_dir = \
os.path.dirname(import_(self.package_name).__file__)
except ImportError:
if debug:
print >> sys.stderr, "target_pkg: no target package", \
self.package_name
# Create the target_package.
last_dot = self.package_name.rfind('.')
if last_dot < 0:
assert filename is not None
package_parent_dir = \
os.path.dirname(os.path.dirname(filename))
else:
package_parent_dir = \
os.path.dirname(
# This import better work!
import_(self.package_name[:last_dot]).__file__)
if filename is not None:
assert os.path.normpath(
os.path.abspath(package_parent_dir)) == \
os.path.normpath(
os.path.dirname(os.path.dirname(filename))), \
"Internal error: %r != %r" % (
os.path.normpath(
os.path.abspath(package_parent_dir)),
os.path.normpath(
os.path.dirname(os.path.dirname(filename))))
if debug:
print >> sys.stderr, "target_pkg package_parent_dir:", \
package_parent_dir
target_package_dir = \
os.path.join(package_parent_dir,
self.package_name[last_dot + 1:])
if debug:
print >> sys.stderr, "target_pkg target_package_dir:", \
target_package_dir
if not os.path.lexists(target_package_dir):
if debug:
print >> sys.stderr, "target_pkg: mkdir", \
target_package_dir
os.mkdir(target_package_dir)
# Does __init__.py file exist?
init_filepath = \
os.path.join(target_package_dir, '__init__.py')
if debug:
print >> sys.stderr, "target_pkg init_filepath:", \
init_filepath
if not os.path.lexists(init_filepath):
# Create empty __init__.py file.
if debug:
print >> sys.stderr, "target_pkg: creating", \
init_filepath
open(init_filepath, 'w').close()
filename = os.path.join(target_package_dir,
'compiled_pyke_files.py')
if filename.endswith('.py'):
self.filename = filename
else:
self.filename = filename[:-1]
self.directory = os.path.dirname(self.filename)
if debug:
print >> sys.stderr, "target_pkg:", self.package_name, self.filename
self.loader = loader
if compiler_version == pyke.compiler_version:
# {(source_package_name, source_filepath):
# [compile_time, target_filename, ...]}
self.sources = sources if sources is not None else {}
elif self.loader is None:
# Force recompile of everything
self.sources = {}
else:
# Loading incorrect pyke.compiler_version from zip file.
# Can't recompile to zip file...
raise AssertionError("%s: wrong version of pyke, "
"running %s, compiled for %s" %
(module_name, pyke.version, pyke_version))
def reset(self, check_sources = True):
''' This should be called once by engine.__init__ prior to calling
add_source_package.
'''
if debug: print >> sys.stderr, "target_pkg.reset"
self.dirty = False
self.check_sources = check_sources
# {(source_package_name, path_from_package): source_package_dir}
self.source_packages = {}
self.compiled_targets = set() # set of target_filename
self.rb_names = set()
def add_source_package(self, source_package_name, path_from_package,
source_package_dir):
if debug:
print >> sys.stderr, "target_pkg.add_source_package " \
"source_package_name:", \
repr(source_package_name)
print >> sys.stderr, " path_from_package:", \
repr(path_from_package)
print >> sys.stderr, " source_package_dir:", \
repr(source_package_dir)
if not self.loader:
assert (source_package_name, path_from_package) not in \
self.source_packages, \
"duplicate source package: %s" % path_from_package
source_dir = os.path.normpath(os.path.join(source_package_dir,
path_from_package))
self.source_packages[source_package_name, path_from_package] = \
source_dir
sources = set([])
for dirpath, dirnames, filenames \
in os.walk(source_dir, onerror=_raise_exc):
for filename in filenames:
if filename.endswith(('.krb', '.kfb', '.kqb')):
source_abspath = os.path.join(dirpath, filename)
assert dirpath.startswith(source_dir)
source_relpath = \
os.path.join(dirpath[len(source_dir)+1:],
filename)
self.add_source(source_package_name, path_from_package,
source_relpath,
os.path.getmtime(source_abspath))
sources.add(source_relpath)
# Delete old source file info for files that are no longer present
for deleted_filepath \
in [src_filepath
for src_pkg_name, src_path_from_pkg, src_filepath
in self.sources.iterkeys()
if src_pkg_name == source_package_name and
src_path_from_pkg == path_from_package and
src_filepath not in sources]:
if debug:
print >> sys.stderr, "del:", source_package_name, filepath
del self.sources[source_package_name, path_from_package,
deleted_filepath]
def add_source(self, source_package_name, path_from_package,
source_filepath, source_mtime):
if debug:
print >> sys.stderr, "target_pkg.add_source:", \
source_package_name, path_from_package, \
source_filepath
rb_name = os.path.splitext(os.path.basename(source_filepath))[0]
if debug: print >> sys.stderr, "rb_name:", rb_name
if not Name_test.match(rb_name):
raise ValueError("%s: %s illegal as python identifier" %
(source_filepath, rb_name))
if rb_name in self.rb_names:
raise ValueError("%s: duplicate knowledge base name" % rb_name)
self.rb_names.add(rb_name)
key = source_package_name, path_from_package, source_filepath
if debug: print >> sys.stderr, "key:", key
if self.sources.get(key, (0,))[0] < source_mtime:
if debug:
print >> sys.stderr, source_filepath, "needs to be compiled"
self.sources[key] = []
self.dirty = True
def do_by_ext(self, prefix, filename, *args):
ext = os.path.splitext(filename)[1][1:]
return getattr(self, "%s_%s" % (prefix, ext))(filename, *args)
def compile(self, engine):
if debug: print >> sys.stderr, "%s.compile:" % self.package_name
global krb_compiler
if self.check_sources and not self.loader:
initialized = False
for (source_package_name, path_from_package, source_filename), \
value \
in self.sources.iteritems():
if not value and \
(source_package_name, path_from_package) in \
self.source_packages:
if not initialized:
try:
krb_compiler
except NameError:
from pyke import krb_compiler
initialized = True
target_files = \
self.do_by_ext('compile',
os.path.join(
self.source_packages[source_package_name,
path_from_package],
source_filename))
if debug: print >> sys.stderr, "target_files:", target_files
value.append(time.time())
value.extend(target_files)
self.compiled_targets.update(target_files)
def compile_krb(self, source_filename):
if debug: print >> sys.stderr, "compile_krb:", source_filename
rb_name = os.path.basename(source_filename)[:-4]
return krb_compiler.compile_krb(rb_name, self.package_name,
self.directory, source_filename)
def compile_kfb(self, source_filename):
if debug: print >> sys.stderr, "compile_kfb:", source_filename
try:
fbc_name = os.path.basename(source_filename)[:-4] + '.fbc'
fbc_path = os.path.join(self.directory, fbc_name)
self.pickle_it(krb_compiler.compile_kfb(source_filename), fbc_path)
return (fbc_name,)
except:
if os.path.lexists(fbc_path): os.remove(fbc_path)
raise
def compile_kqb(self, source_filename):
if debug: print >> sys.stderr, "compile_kqb:", source_filename
try:
qbc_name = os.path.basename(source_filename)[:-4] + '.qbc'
qbc_path = os.path.join(self.directory, qbc_name)
self.pickle_it(krb_compiler.compile_kqb(source_filename), qbc_path)
return (qbc_name,)
except:
if os.path.lexists(qbc_path): os.remove(qbc_path)
raise
def write(self):
if debug: print >> sys.stderr, "target_pkg.write"
if self.dirty:
sys.stderr.write('writing [%s]/%s\n' %
(self.package_name,
os.path.basename(self.filename)))
with open(self.filename, 'w') as f:
f.write("# compiled_pyke_files.py\n\n")
f.write("from pyke import target_pkg\n\n")
f.write("pyke_version = %r\n" % pyke.version)
f.write("compiler_version = %r\n" % pyke.compiler_version)
f.write("target_pkg_version = %r\n\n" % pyke.target_pkg_version)
f.write("try:\n")
f.write(" loader = __loader__\n")
f.write("except NameError:\n")
f.write(" loader = None\n\n")
f.write("def get_target_pkg():\n")
f.write(" return target_pkg.target_pkg(__name__, __file__, "
"pyke_version, loader, {\n")
for key, value in self.sources.iteritems():
if debug: print >> sys.stderr, "write got:", key, value
if (key[0], key[1]) in self.source_packages:
if debug: print >> sys.stderr, "writing:", key, value
f.write(" %r:\n" % (key,))
f.write(" %r,\n" % (value,))
f.write(" },\n")
f.write(" compiler_version)\n\n")
if os.path.exists(self.filename + 'c'):
os.remove(self.filename + 'c')
if os.path.exists(self.filename + 'o'):
os.remove(self.filename + 'o')
def load(self, engine, load_fc = True, load_bc = True,
load_fb = True, load_qb = True):
load_flags = {'load_fc': load_fc, 'load_bc': load_bc,
'load_fb': load_fb, 'load_qb': load_qb}
if debug: print >> sys.stderr, "target_pkg.load:", load_flags
for (source_package_name, path_from_package, source_filename), value \
in self.sources.iteritems():
if not self.check_sources or self.loader or \
(source_package_name, path_from_package) in self.source_packages:
for target_filename in value[1:]:
if debug: print >> sys.stderr, "load:", target_filename
self.do_by_ext('load', target_filename, engine, load_flags)
def load_py(self, target_filename, engine, flags):
if debug: print >> sys.stderr, "load_py:", target_filename
target_module = target_filename[:-3] # strip '.py' extension.
module_path = self.package_name + '.' + target_module
if target_module.endswith('_fc'):
if flags['load_fc']:
self.load_module(module_path, target_filename, engine)
elif target_module.endswith('_bc'):
if flags['load_bc']:
self.load_module(module_path, target_filename, engine)
elif target_module.endswith('_plans'):
if flags['load_bc']:
self.load_module(module_path, target_filename, engine, False)
else:
raise AssertionError("target_pkg.load_py: "
"unknown target file type: %s" %
target_filename)
def load_fbc(self, target_filename, engine, flags):
if debug: print >> sys.stderr, "load_fbc:", target_filename
if flags['load_fb']:
self.load_pickle(target_filename, engine)
def load_qbc(self, target_filename, engine, flags):
if debug: print >> sys.stderr, "load_qbc:", target_filename
if flags['load_qb']:
self.load_pickle(target_filename, engine)
def load_module(self, module_path, filename, engine, do_import = True):
if debug: print >> sys.stderr, "load_module:", module_path, filename
module = None
if module_path in sys.modules:
if debug: print >> sys.stderr, "load_module: already imported"
module = sys.modules[module_path]
if filename in self.compiled_targets:
if debug: print >> sys.stderr, "load_module: reloading"
module = reload(module)
elif do_import:
if debug: print >> sys.stderr, "load_module: importing"
module = import_(module_path)
if module is not None and \
getattr(module, 'compiler_version', 0) != pyke.compiler_version:
raise AssertionError("%s: incorrect pyke version: running "
"%s, expected %s" %
(filename, pyke.version,
module.pyke_version))
if do_import: module.populate(engine)
def load_pickle(self, filename, engine):
global pickle
if debug: print >> sys.stderr, "load_pickle:", filename
try:
pickle
except NameError:
import cPickle as pickle
full_path = os.path.join(self.directory, filename)
if self.loader:
import contextlib
import StringIO
ctx_lib = \
contextlib.closing(
StringIO.StringIO(self.loader.get_data(full_path)))
else:
ctx_lib = open(full_path, 'rb')
with ctx_lib as f:
versions = pickle.load(f)
if isinstance(versions, tuple):
pyke_version, compiler_version = versions
else:
pyke_version, compiler_version = versions, 0
if compiler_version != pyke.compiler_version:
raise AssertionError("%s: incorrect pyke version: running "
"%s, expected %s" %
(filename, pyke.version, pyke_version))
pickle.load(f).register(engine)
def pickle_it(self, obj, path):
global pickle
try:
pickle
except NameError:
import cPickle as pickle
import copy_reg
copy_reg.pickle(slice, lambda s: (slice, (s.start, s.stop, s.step)))
sys.stderr.write("writing [%s]/%s\n" %
(self.package_name, os.path.basename(path)))
with open(path, 'wb') as f:
pickle.dump((pyke.version, pyke.compiler_version), f)
pickle.dump(obj, f)
def _raise_exc(exc): raise exc
def import_(modulename):
''' modulepath does not include .py
'''
if debug: print >> sys.stderr, "import_:", modulename
mod = __import__(modulename)
for comp in modulename.split('.')[1:]:
mod = getattr(mod, comp)
return mod