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from __future__ import annotations
from typing import TYPE_CHECKING
from pathlib import Path
from .diff import Diff, File
from .process import Process
if TYPE_CHECKING:
from .context import Context
from .config import Config
class Patch:
config: Config
patch: Path
file: str
processors: list[tuple[type[Process], Process.Args]] = []
def __init__(self, config: Config, patch: Path):
self.patch = patch
self.config = config
self.processors.clear()
self.file, *proc_strs = str(patch).split(config.process_delimiter)
for proc_str in proc_strs:
proc_name, *argv = proc_str.split(",")
args = Process.Args(name=proc_name, argv=argv)
proc_cls = config.processors.get(proc_name, None)
if proc_cls is None:
raise Exception(f"unknown processor: `{proc_cls}'")
for arg in argv:
key, value, *_ = (*arg.split("=", 1), None)
args.argd[key] = value
self.processors.insert(
0,
(
proc_cls,
args,
),
)
def write(self, context: Context) -> None:
if context.root is not None:
self.file = str(Path(self.file).relative_to(context.root))
diff = Diff(self.config, self.file)
diff.a = File(
content=context.get_content(self.file),
mode=context.get_mode(self.file),
)
diff.b = File(
content=self.patch.read_text(),
mode=self.patch.stat().st_mode,
)
for cls, args in self.processors:
processor = cls(context, args)
diff.b = processor.transform(diff.a, diff.b)
delta = diff.compare()
context.output.write(delta)
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