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from __future__ import annotations
from typing import TYPE_CHECKING
from pathlib import Path
from .diff import Diff
if TYPE_CHECKING:
from .process import Process
from .context import Context
from .config import Config
class Patch:
config: Config
patch: Path
file: str
file_name: str = ""
file_type: str = ""
processors: list[str] = []
def __init__(self, config: Config, patch: Path):
self.patch = patch
self.config = config
self.file_name = patch.name
# find preprocessors
idx = self.file_name.find(config.process_delimiter)
if idx >= 0:
self.processors = self.file_name[idx:].split(config.process_delimiter)
self.processors = [template.strip() for template in self.processors]
self.processors = [
template for template in self.processors if len(template) > 0
]
self.processors.reverse()
self.file_name = self.file_name[:idx]
# save the path to the target file
self.file = str(patch.parent.joinpath(self.file_name))
# find and split at file extension
idx = self.file_name.find(".")
if idx >= 0:
self.file_type = self.file_name[idx:]
self.file_name = self.file_name[:idx]
def get_diff(self) -> type[Diff]:
return self.config.diff_strategies.get(self.file_type, Diff)
def get_processors(self) -> list[type[Process]]:
processors = []
for processor in self.processors:
if processor not in self.config.processors:
continue
processors.append(self.config.processors[processor])
return processors
def write(self, context: Context) -> None:
diff_class = self.get_diff()
processor_classes = self.get_processors()
diff = diff_class(self.file)
# read file A contents
content_a = context.get_content(self.file)
# read file B contents
content_b = self.patch.read_text()
for processor_class in processor_classes:
processor = processor_class(context)
content_b = processor.transform(content_a, content_b)
diff.content_a = content_a
diff.content_b = content_b
delta = diff.diff()
context.output.write(delta)
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