Viewing file:  via_template.py (2.32 KB) -rw-r--r--
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from __future__ import absolute_import, unicode_literals
import os
import sys
from abc import ABCMeta, abstractmethod
from six import add_metaclass
from virtualenv.util.six import ensure_text
from .activator import Activator
if sys.version_info >= (3, 7):
from importlib.resources import read_binary
else:
from importlib_resources import read_binary
@add_metaclass(ABCMeta)
class ViaTemplateActivator(Activator):
@abstractmethod
def templates(self):
raise NotImplementedError
def generate(self, creator):
dest_folder = creator.bin_dir
replacements = self.replacements(creator, dest_folder)
generated = self._generate(replacements, self.templates(), dest_folder, creator)
if self.flag_prompt is not None:
creator.pyenv_cfg["prompt"] = self.flag_prompt
return generated
def replacements(self, creator, dest_folder):
return {
"__VIRTUAL_PROMPT__": "" if self.flag_prompt is None else self.flag_prompt,
"__VIRTUAL_ENV__": ensure_text(str(creator.dest)),
"__VIRTUAL_NAME__": creator.env_name,
"__BIN_NAME__": ensure_text(str(creator.bin_dir.relative_to(creator.dest))),
"__PATH_SEP__": ensure_text(os.pathsep),
}
def _generate(self, replacements, templates, to_folder, creator):
generated = []
for template in templates:
text = self.instantiate_template(replacements, template, creator)
dest = to_folder / self.as_name(template)
# use write_bytes to avoid platform specific line normalization (\n -> \r\n)
dest.write_bytes(text.encode("utf-8"))
generated.append(dest)
return generated
def as_name(self, template):
return template.name
def instantiate_template(self, replacements, template, creator):
# read content as binary to avoid platform specific line normalization (\n -> \r\n)
binary = read_binary(self.__module__, str(template))
text = binary.decode("utf-8", errors="strict")
for key, value in replacements.items():
value = self._repr_unicode(creator, value)
text = text.replace(key, value)
return text
@staticmethod
def _repr_unicode(creator, value):
# by default we just let it be unicode
return value
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