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from collections.abc import Iterable, Mapping
import os
import os.path
from string import Template
from ._iter import CruIterator
from ._error import CruException
class CruTemplateError(CruException):
pass
class CruTemplate:
def __init__(self, prefix: str, text: str):
self._prefix = prefix
self._template = Template(text)
self._variables = (
CruIterator(self._template.get_identifiers())
.filter(lambda i: i.startswith(self._prefix))
.to_set()
)
self._all_variables = set(self._template.get_identifiers())
@property
def prefix(self) -> str:
return self._prefix
@property
def real_template(self) -> Template:
return self._template
@property
def variables(self) -> set[str]:
return self._variables
@property
def all_variables(self) -> set[str]:
return self._all_variables
@property
def has_no_variables(self) -> bool:
return len(self._variables) == 0
def generate(self, mapping: Mapping[str, str], allow_extra: bool = True) -> str:
values = dict(mapping)
if not self.variables <= set(values.keys()):
raise CruTemplateError("Missing variables.")
if not allow_extra and not set(values.keys()) <= self.variables:
raise CruTemplateError("Extra variables.")
return self._template.safe_substitute(values)
class CruTemplateFile(CruTemplate):
def __init__(self, prefix: str, source: str, destination_path: str):
self._source = source
self._destination = destination_path
with open(source, "r") as f:
super().__init__(prefix, f.read())
@property
def source(self) -> str:
return self._source
@property
def destination(self) -> str | None:
return self._destination
def generate_to_destination(
self, mapping: Mapping[str, str], allow_extra: bool = True
) -> None:
with open(self._destination, "w") as f:
f.write(self.generate(mapping, allow_extra))
class TemplateTree:
def __init__(
self,
prefix: str,
source: str,
destination: str,
exclude: Iterable[str] | None = None,
template_file_suffix: str = ".template",
):
self._prefix = prefix
self._files: list[CruTemplateFile] | None = None
self._source = source
self._destination = destination
self._exclude = [os.path.normpath(p) for p in exclude or []]
self._template_file_suffix = template_file_suffix
@property
def prefix(self) -> str:
return self._prefix
@property
def files(self) -> list[CruTemplateFile]:
if self._files is None:
self.reload()
return self._files # type: ignore
@property
def template_files(self) -> list[CruTemplateFile]:
return (
CruIterator(self.files).filter(lambda f: not f.has_no_variables).to_list()
)
@property
def non_template_files(self) -> list[CruTemplateFile]:
return CruIterator(self.files).filter(lambda f: f.has_no_variables).to_list()
@property
def source(self) -> str:
return self._source
@property
def destination(self) -> str:
return self._destination
@property
def exclude(self) -> list[str]:
return self._exclude
@property
def template_file_suffix(self) -> str:
return self._template_file_suffix
@staticmethod
def _scan_files(root_path: str, exclude: list[str]) -> Iterable[str]:
for root, _dirs, files in os.walk(root_path):
for file in files:
path = os.path.join(root, file)
path = os.path.relpath(path, root_path)
is_exclude = False
for exclude_path in exclude:
if path.startswith(exclude_path):
is_exclude = True
break
if not is_exclude:
yield path
def reload(self, strict=True) -> None:
self._files = []
file_names = self._scan_files(self.source, self.exclude)
for file_name in file_names:
source = os.path.join(self.source, file_name)
destination = os.path.join(self.destination, file_name)
file = CruTemplateFile(self._prefix, source, destination)
if file_name.endswith(self.template_file_suffix):
if strict and file.has_no_variables:
raise CruTemplateError(
f"Template file {file_name} has no variables."
)
else:
if strict and not file.has_no_variables:
raise CruTemplateError(f"Non-template {file_name} has variables.")
self._files.append(file)
@property
def variables(self) -> set[str]:
s = set()
for file in self.files:
s.update(file.variables)
return s
def generate_to_destination(self, variables: Mapping[str, str]) -> None:
for file in self.files:
file.generate_to_destination(variables)
|
