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108 lines
3.0 KiB
Python
108 lines
3.0 KiB
Python
4 years ago
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import os
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import re
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import tempfile
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from mako import exceptions
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from mako.template import Template
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from .compat import get_current_bytecode_suffixes
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from .compat import has_pep3147
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from .compat import load_module_py
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from .compat import load_module_pyc
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from .compat import py35
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from .exc import CommandError
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def template_to_file(template_file, dest, output_encoding, **kw):
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template = Template(filename=template_file)
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try:
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output = template.render_unicode(**kw).encode(output_encoding)
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except:
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with tempfile.NamedTemporaryFile(suffix=".txt", delete=False) as ntf:
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ntf.write(
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exceptions.text_error_template()
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.render_unicode()
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.encode(output_encoding)
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)
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fname = ntf.name
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raise CommandError(
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"Template rendering failed; see %s for a "
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"template-oriented traceback." % fname
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)
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else:
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with open(dest, "wb") as f:
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f.write(output)
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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 pyc_file_from_path(path):
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"""Given a python source path, locate the .pyc.
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"""
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if has_pep3147():
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if py35:
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import importlib
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candidate = importlib.util.cache_from_source(path)
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else:
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import imp
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candidate = imp.cache_from_source(path)
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if os.path.exists(candidate):
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return candidate
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# even for pep3147, fall back to the old way of finding .pyc files,
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# to support sourceless operation
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filepath, ext = os.path.splitext(path)
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for ext in get_current_bytecode_suffixes():
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if os.path.exists(filepath + ext):
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return filepath + ext
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else:
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return None
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def edit(path):
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"""Given a source path, run the EDITOR for it"""
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import editor
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try:
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editor.edit(path)
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except Exception as exc:
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raise CommandError("Error executing editor (%s)" % (exc,))
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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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else:
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pyc_path = pyc_file_from_path(path)
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if pyc_path is None:
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raise ImportError("Can't find Python file %s" % path)
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else:
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module = load_module_pyc(module_id, pyc_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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return module
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