hy/hy/importer.py

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# Copyright (c) 2013 Paul Tagliamonte <paultag@debian.org>
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#
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# 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.
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from py_compile import wr_long, MAGIC
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from hy.compiler import hy_compile
from hy.models import HyObject
from hy.core import process
from hy.lex import tokenize
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from io import open
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import marshal
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import imp
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import sys
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import ast
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import os
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if sys.version_info[0] >= 3:
from io import StringIO
else:
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from StringIO import StringIO # NOQA
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def import_buffer_to_hst(fd):
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tree = tokenize(fd.read() + "\n")
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tree = process(tree)
return tree
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def import_file_to_hst(fpath):
return import_buffer_to_hst(open(fpath, 'r', encoding='utf-8'))
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def import_file_to_ast(fpath):
tree = import_file_to_hst(fpath)
_ast = hy_compile(tree)
return _ast
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def import_string_to_ast(buff):
tree = import_buffer_to_hst(StringIO(buff))
_ast = hy_compile(tree)
return _ast
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def import_file_to_module(name, fpath):
_ast = import_file_to_ast(fpath)
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mod = imp.new_module(name)
mod.__file__ = fpath
eval(compile(_ast, fpath, "exec"), mod.__dict__)
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return mod
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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(compile(_ast, "<eval>", "eval"), namespace)
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def write_hy_as_pyc(fname):
with open(fname, 'U') as f:
try:
timestamp = long(os.fstat(f.fileno()).st_mtime)
except AttributeError:
timestamp = long(os.stat(fname).st_mtime)
_ast = import_file_to_ast(fname)
code = compile(_ast, fname, "exec")
cfile = "%s.pyc" % fname[:-len(".hy")]
with open(cfile, 'wb') as fc:
fc.write('\0\0\0\0')
wr_long(fc, timestamp)
marshal.dump(code, fc)
fc.flush()
fc.seek(0, 0)
fc.write(MAGIC)
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class HyFinder(object):
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 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
class MetaLoader(HyFinder):
def load_module(self, fullname):
if fullname in sys.modules:
return sys.modules[fullname]
pth = self.find_on_path(fullname)
if pth is None:
return
sys.modules[fullname] = None
mod = import_file_to_module(fullname, pth)
ispkg = self.is_package(fullname)
mod.__file__ = pth
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(HyFinder):
def find_module(self, fullname, path=None):
pth = self.find_on_path(fullname)
if pth is None:
return
return MetaLoader()
sys.meta_path.append(MetaImporter())
sys.path.insert(0, "")