hy/hy/importer.py
Julien Danjou 7f230fdd10 importer: remove useless import
Signed-off-by: Julien Danjou <julien@danjou.info>
2013-04-20 22:14:08 +02:00

183 lines
5.2 KiB
Python

# Copyright (c) 2013 Paul Tagliamonte <paultag@debian.org>
#
# 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.
from py_compile import wr_long, MAGIC
from hy.compiler import hy_compile
from hy.models import HyObject
from hy.core import process
from hy.lex import tokenize
from io import open
import marshal
import imp
import sys
import ast
import os
import __future__
if sys.version_info[0] >= 3:
long_type = int
else:
import __builtin__
long_type = long # NOQA
def ast_compile(ast, filename, mode):
"""Compile AST.
Like Python's compile, but with some special flags."""
return compile(ast, filename, mode, __future__.CO_FUTURE_DIVISION)
def import_buffer_to_hst(buf):
"""Import content from buf and return an Hy AST."""
return process(tokenize(buf + "\n"))
def import_file_to_hst(fpath):
"""Import content from fpath and return an Hy AST."""
with open(fpath, 'r', encoding='utf-8') as f:
return import_buffer_to_hst(f.read())
def import_buffer_to_ast(buf):
""" Import content from buf and return a Python AST."""
return hy_compile(import_buffer_to_hst(buf))
def import_file_to_ast(fpath):
"""Import content from fpath and return a Python AST."""
return hy_compile(import_file_to_hst(fpath))
def import_file_to_module(module_name, fpath):
"""Import content from fpath and puts it into a Python module.
Returns the module."""
_ast = import_file_to_ast(fpath)
mod = imp.new_module(module_name)
mod.__file__ = fpath
eval(ast_compile(_ast, fpath, "exec"), mod.__dict__)
return mod
def hy_eval(hytree, namespace):
foo = HyObject()
foo.start_line = 0
foo.end_line = 0
foo.start_column = 0
foo.end_column = 0
hytree.replace(foo)
_ast = hy_compile(hytree, root=ast.Expression)
return eval(ast_compile(_ast, "<eval>", "eval"), namespace)
def write_hy_as_pyc(fname):
with open(fname, 'U') as f:
try:
st = os.fstat(f.fileno())
except AttributeError:
st = os.stat(fname)
timestamp = long_type(st.st_mtime)
_ast = import_file_to_ast(fname)
code = ast_compile(_ast, fname, "exec")
cfile = "%s.pyc" % fname[:-len(".hy")]
if sys.version_info[0] >= 3:
open_ = open
else:
open_ = __builtin__.open
with open_(cfile, 'wb') as fc:
if sys.version_info[0] >= 3:
fc.write(b'\0\0\0\0')
else:
fc.write('\0\0\0\0')
wr_long(fc, timestamp)
if (sys.version_info[0] >= 3 and sys.version_info[1] >= 3):
wr_long(fc, st.st_size)
marshal.dump(code, fc)
fc.flush()
fc.seek(0, 0)
fc.write(MAGIC)
class MetaLoader(object):
def __init__(self, path):
self.path = path
def is_package(self, fullname):
dirpath = "/".join(fullname.split("."))
for pth in sys.path:
pth = os.path.abspath(pth)
composed_path = "%s/%s/__init__.hy" % (pth, dirpath)
if os.path.exists(composed_path):
return True
return False
def load_module(self, fullname):
if fullname in sys.modules:
return sys.modules[fullname]
if not self.path:
return
sys.modules[fullname] = None
mod = import_file_to_module(fullname,
self.path)
ispkg = self.is_package(fullname)
mod.__file__ = self.path
mod.__loader__ = self
mod.__name__ = fullname
if ispkg:
mod.__path__ = []
mod.__package__ = fullname
else:
mod.__package__ = fullname.rpartition('.')[0]
sys.modules[fullname] = mod
return mod
class MetaImporter(object):
def find_on_path(self, fullname):
fls = ["%s/__init__.hy", "%s.hy"]
dirpath = "/".join(fullname.split("."))
for pth in sys.path:
pth = os.path.abspath(pth)
for fp in fls:
composed_path = fp % ("%s/%s" % (pth, dirpath))
if os.path.exists(composed_path):
return composed_path
def find_module(self, fullname, path=None):
path = self.find_on_path(fullname)
if path:
return MetaLoader(path)
sys.meta_path.append(MetaImporter())
sys.path.insert(0, "")