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62 lines
2.8 KiB
Python
62 lines
2.8 KiB
Python
# SPDX-FileCopyrightText: 2022 Espressif Systems (Shanghai) CO LTD
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# SPDX-License-Identifier: Apache-2.0
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import fnmatch
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import glob
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import os
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from typing import List, Optional, Tuple, Union
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class Snapshot:
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"""
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Helper class for working with build snapshots.
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A snapshot is a set of files along with their modification timestamps.
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"""
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def __init__(self, files: List[str]) -> None:
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"""Create a snapshot of the given list of files, recording their mtimes"""
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self.info: List[Tuple[str, int]] = []
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for file in sorted(files):
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st = os.stat(file)
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self.info.append((file, st.st_mtime_ns))
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def assert_same(self, other: 'Snapshot') -> None:
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"""Assert that this snapshot has the same files and mtimes as the other snapshot"""
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for my_info, other_info in zip(self.info, other.info):
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assert my_info[0] == other_info[0], f'Snapshots mismatch, expected file {my_info[0]}, found {other_info[0]}'
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assert my_info[1] == other_info[1], f'File {my_info[0]} timestamp has changed! diff={(other_info[1]-my_info[1])/10**9}'
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def assert_different(self, other: 'Snapshot') -> None:
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"""Assert that this snapshot has the same files as the other snapshot, but all mtimes are different"""
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for my_info, other_info in zip(self.info, other.info):
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assert my_info[0] == other_info[0], f'Snapshots mismatch, expected file {my_info[0]}, found {other_info[0]}'
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assert my_info[1] != other_info[1], f'File {my_info[0]} timestamp has not changed! ({my_info[1]})'
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def get_snapshot(glob_patterns: Union[str, List[str]],
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exclude_patterns: Optional[Union[str, List[str]]] = None) -> Snapshot:
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"""Return a snapshot including the files matched by glob_patterns, and excluding those matched by exclude_patterns"""
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if isinstance(glob_patterns, str):
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glob_patterns = [glob_patterns]
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if isinstance(exclude_patterns, str):
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exclude_patterns_list = [exclude_patterns]
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elif exclude_patterns is None:
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exclude_patterns_list = []
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elif isinstance(exclude_patterns, list):
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exclude_patterns_list = exclude_patterns
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else:
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raise ValueError(f'Unexpcted type of exclude_patterns: ({type(exclude_patterns)}')
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# whether the path found by glob.glob should be excluded?
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def should_exclude(filename: str) -> bool:
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return os.path.isdir(filename) or \
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any((fnmatch.fnmatch(filename, pattern) for pattern in exclude_patterns_list))
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files_to_snapshot: List[str] = []
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for pattern in glob_patterns:
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found = filter(lambda f: not should_exclude(f),
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glob.glob(pattern, recursive=True))
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if not found:
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raise RuntimeError(f'failed to match any files with pattern {pattern}')
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files_to_snapshot.extend(found)
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return Snapshot(files_to_snapshot)
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