|
| 1 | +import argparse |
| 2 | +import logging |
| 3 | +import os |
| 4 | +import subprocess |
| 5 | +import sys |
| 6 | +import typing |
| 7 | +import pathlib |
| 8 | + |
| 9 | +""" |
| 10 | +This script reverts changes in PO files when only the timestamp has changed. |
| 11 | +It helps to create meaningful commits by ignoring unnecessary changes. |
| 12 | +""" |
| 13 | + |
| 14 | + |
| 15 | +def get_git_changeset(from_ref, to_ref) -> str: |
| 16 | + """ |
| 17 | + Constructs the changeset string for `git diff` based on from_ref and |
| 18 | + to_ref. |
| 19 | + """ |
| 20 | + from_ref = ( |
| 21 | + from_ref |
| 22 | + or os.getenv("PRE_COMMIT_FROM_REF") |
| 23 | + or os.getenv("PRE_COMMIT_SOURCE") |
| 24 | + or "HEAD" |
| 25 | + ) |
| 26 | + to_ref = ( |
| 27 | + to_ref |
| 28 | + or os.getenv("PRE_COMMIT_TO_REF") |
| 29 | + or os.getenv("PRE_COMMIT_ORIGIN") |
| 30 | + ) |
| 31 | + return f"{from_ref}...{to_ref}" if to_ref else from_ref |
| 32 | + |
| 33 | + |
| 34 | +def count_meaningful_changes(changeset: str, po_file: pathlib.Path) -> int: |
| 35 | + """ |
| 36 | + Counts meaningful changes in the diff for a given PO file. |
| 37 | + """ |
| 38 | + cmd = [ |
| 39 | + "git", |
| 40 | + "diff", |
| 41 | + "--patch", |
| 42 | + "--unified=0", |
| 43 | + changeset, |
| 44 | + "--", |
| 45 | + os.fspath(po_file), |
| 46 | + ] |
| 47 | + output = subprocess.check_output(cmd, text=True) |
| 48 | + |
| 49 | + diff_lines = output.splitlines() |
| 50 | + return sum( |
| 51 | + 1 |
| 52 | + for line in diff_lines |
| 53 | + if (line.startswith("-") or line.startswith("+")) |
| 54 | + and "POT-Creation-Date:" not in line |
| 55 | + and "PO-Revision-Date:" not in line |
| 56 | + and str(po_file) not in line |
| 57 | + ) |
| 58 | + |
| 59 | + |
| 60 | +def revert_po_file(changeset, po_file: pathlib.Path) -> None: |
| 61 | + """ |
| 62 | + Reverts a PO file to its original state in the given changeset. |
| 63 | + """ |
| 64 | + # Use the first part of the changeset as the reference |
| 65 | + ref = changeset.split("...", 1)[0] |
| 66 | + logger = logging.getLogger(__name__) |
| 67 | + logger.info(f"{po_file} has no meaningful changes, reverting to {ref}") |
| 68 | + cmd = ["git", "show", f"{ref}:{po_file}"] |
| 69 | + output = subprocess.check_output(cmd, text=True) |
| 70 | + |
| 71 | + with po_file.open(mode="w") as file: |
| 72 | + file.write(output) |
| 73 | + |
| 74 | + |
| 75 | +def main(argv: typing.Optional[typing.List[str]] = None) -> int: |
| 76 | + logging.basicConfig( |
| 77 | + format="[%(levelname)s] %(message)s", level=logging.INFO |
| 78 | + ) |
| 79 | + parser = argparse.ArgumentParser( |
| 80 | + description="Revert PO files with only timestamp changes." |
| 81 | + ) |
| 82 | + parser.add_argument("--from-ref", help="Use changes since this commit.") |
| 83 | + parser.add_argument("--to-ref", help="Use changes until this commit.") |
| 84 | + parser.add_argument( |
| 85 | + "files", nargs="*", type=pathlib.Path, help="Only check these files." |
| 86 | + ) |
| 87 | + args = parser.parse_args(argv) |
| 88 | + |
| 89 | + files_to_process = args.files if args.files else [] |
| 90 | + |
| 91 | + changeset = get_git_changeset(args.from_ref, args.to_ref) |
| 92 | + |
| 93 | + for po_file in files_to_process: |
| 94 | + count = count_meaningful_changes(changeset, po_file) |
| 95 | + if count == 0: |
| 96 | + revert_po_file(changeset, po_file) |
| 97 | + |
| 98 | + return 0 |
| 99 | + |
| 100 | + |
| 101 | +if __name__ == "__main__": |
| 102 | + sys.exit(main()) |
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