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import itertools |
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import os |
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import tempfile |
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from dataclasses import dataclass |
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from pathlib import Path |
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from typing import Iterable |
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import rich_click as click |
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from charset_normalizer import from_path |
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@dataclass |
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class Insertion: |
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text: str |
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line_number: int |
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label: str |
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col: int = -1 # Use with `inline` |
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inline: bool = False # Insert into existing line instead of adding new line |
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def partition(pred, iterable): |
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"Use a predicate to partition entries into false entries and true entries" |
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# partition(is_odd, range(10)) --> 0 2 4 6 8 and 1 3 5 7 9 |
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t1, t2 = itertools.tee(iterable) |
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return itertools.filterfalse(pred, t1), filter(pred, t2) |
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def insert_in_lines(lines: Iterable[str], insertions: Iterable[Insertion]): |
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# TODO: verbose flag |
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# print("INSERTION", insertions) |
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lines = iter(lines) |
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last_line = 1 |
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insertion_groups = itertools.groupby(insertions, key=lambda ins: ins.line_number) |
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for line_number, insertion_group in insertion_groups: |
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for line in itertools.islice(lines, line_number - last_line): |
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yield line |
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last_line += 1 |
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full_insertions, inline_insertions = partition( |
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lambda ins: ins.inline, insertion_group |
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) |
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for insertion in full_insertions: |
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yield insertion.text + "\n" |
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line_to_edit = None |
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col_offset = 0 |
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for insertion in inline_insertions: |
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if not line_to_edit: |
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line_to_edit = next(lines, "") |
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# insertion.col is 1-indexed, col is zero indexed |
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col = insertion.col + col_offset - 1 |
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col_offset += len(insertion.text) |
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line_to_edit = line_to_edit[:col] + insertion.text + line_to_edit[col:] |
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if line_to_edit: |
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yield line_to_edit |
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last_line += 1 |
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yield from lines |
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class SourceFile: |
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def __init__(self, path: str): |
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self.path = path |
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self.encoding = None |
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self._initial_modified_time = os.path.getmtime(path) |
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def load_source_as_utf8(self): |
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loaded = from_path(self.path) |
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best_guess = loaded.best() |
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self.encoding = best_guess.encoding |
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return best_guess.output(encoding="utf_8") |
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def is_unicode(self): |
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return self.encoding.startswith("utf") |
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74
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def update_file(self, insertions: Iterable[Insertion], suffix: str) -> None: |
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path_obj = Path(self.path) |
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with path_obj.open("r", encoding=self.encoding) as filehandle: |
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if self.modified_after_loaded(): |
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raise click.FileError( |
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self.path, "File was externally modified, try again." |
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) |
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new_lines = list(insert_in_lines(lines=filehandle, insertions=insertions)) |
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out_file = path_obj.with_suffix(f"{path_obj.suffix}{suffix}") |
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self._write_result(new_lines, out_file) |
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def _write_result(self, lines: list, output_file: Path) -> None: |
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with tempfile.TemporaryDirectory() as tempdir: |
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my_tempfile: Path = Path(tempdir) / "output.txt" |
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with my_tempfile.open("w") as filehandle: |
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for line in lines: |
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filehandle.write(line) |
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my_tempfile.replace(output_file) |
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def modified_after_loaded(self) -> bool: |
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return os.path.getmtime(self.path) > self._initial_modified_time |
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craftvscruft /
menderbot
