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 hy.compiler import hy_compile
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from hy.lex import tokenize
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from hy.core import process
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import imp
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import sys
import os
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if sys.version_info[0] >= 3:
from io import StringIO
else:
from StringIO import StringIO
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'))
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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):
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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__)
return mod
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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, "")