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#!/usr/bin/env python3
import glob
import shutil
import sys
import os
def trim(directory, patterns_file, verbose=True, dry_run=False):
if dry_run:
verbose = True
# Build list of patterns.
pattern_list = []
exclude_list = []
subdir = directory
with open(patterns_file) as fp:
for line in fp:
line = line.strip()
# Empty line, ignore.
if not line:
continue
# Comment, ignore.
if line.startswith("#"):
continue
# Sub-directory change.
if line.startswith(":"):
subdir = os.path.join(directory, line[1:])
continue
# Pattern (relative to current sub-directory).
if line.startswith("!"):
exclude_list.append(os.path.join(subdir, line[1:]))
else:
pattern_list.append(os.path.join(subdir, line))
# Create list of files to keep based on exclusion list.
to_keep = set()
for pattern in exclude_list:
to_keep.update(glob.glob(pattern, recursive=True))
# Trim directory tree.
for pattern in pattern_list:
for path in reversed(glob.glob(pattern, recursive=True)):
if path in to_keep:
continue
if verbose:
print("removing", path)
if dry_run:
continue
if os.path.isdir(path):
shutil.rmtree(path)
else:
os.unlink(path)
if __name__ == "__main__":
directory, patterns_file = sys.argv[1:]
trim(directory, patterns_file)
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