81 lines
2.4 KiB
Python
81 lines
2.4 KiB
Python
import sys
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import os
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import re
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from .compat import load_module_py, load_module_pyc
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from mako.template import Template
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def template_to_file(template_file, dest, output_encoding, **kw):
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with open(dest, 'wb') as f:
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template = Template(filename=template_file)
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f.write(
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template.render_unicode(**kw).encode(output_encoding)
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)
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def coerce_resource_to_filename(fname):
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"""Interpret a filename as either a filesystem location or as a package
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resource.
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Names that are non absolute paths and contain a colon
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are interpreted as resources and coerced to a file location.
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"""
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if not os.path.isabs(fname) and ":" in fname:
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import pkg_resources
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fname = pkg_resources.resource_filename(*fname.split(':'))
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return fname
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def simple_pyc_file_from_path(path):
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"""Given a python source path, return the so-called
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"sourceless" .pyc or .pyo path.
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This just a .pyc or .pyo file where the .py file would be.
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Even with PEP-3147, which normally puts .pyc/.pyo files in __pycache__,
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this use case remains supported as a so-called "sourceless module import".
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"""
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if sys.flags.optimize:
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return path + "o" # e.g. .pyo
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else:
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return path + "c" # e.g. .pyc
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def pyc_file_from_path(path):
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"""Given a python source path, locate the .pyc.
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See http://www.python.org/dev/peps/pep-3147/
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#detecting-pep-3147-availability
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http://www.python.org/dev/peps/pep-3147/#file-extension-checks
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"""
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import imp
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has3147 = hasattr(imp, 'get_tag')
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if has3147:
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return imp.cache_from_source(path)
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else:
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return simple_pyc_file_from_path(path)
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def load_python_file(dir_, filename):
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"""Load a file from the given path as a Python module."""
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module_id = re.sub(r'\W', "_", filename)
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path = os.path.join(dir_, filename)
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_, ext = os.path.splitext(filename)
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if ext == ".py":
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if os.path.exists(path):
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module = load_module_py(module_id, path)
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elif os.path.exists(simple_pyc_file_from_path(path)):
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# look for sourceless load
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module = load_module_pyc(
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module_id, simple_pyc_file_from_path(path))
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else:
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raise ImportError("Can't find Python file %s" % path)
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elif ext in (".pyc", ".pyo"):
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module = load_module_pyc(module_id, path)
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del sys.modules[module_id]
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return module
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