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sane-sync-music: update files if mtime differs

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*presumably* most tagging software updates the mtime when tags change, but i didn't actually check
This commit is contained in:
Colin 2023-12-08 15:07:12 +00:00
parent 368099e95a
commit 8b09599c5e
1 changed files with 58 additions and 22 deletions
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80
pkgs/additional/sane-scripts/src/sane-sync-music
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@ -3,6 +3,7 @@
# vim: set filetype=python :
import argparse
import concurrent.futures
import datetime
import logging
import multiprocessing
import os
@ -76,6 +77,9 @@ IGNORE = [
'.nsf_',
]
def approx_eq(a: float, b: float, threshold: float) -> bool:
return abs(b - a) <= threshold
def clean_name(path: Path) -> Path:
'''
transform a path into something which most filesystems/protocols can reliably support.
@ -151,6 +155,17 @@ class Encoder:
self.prefs = prefs
self.dry_run = dry_run
def destructive(self, default_, f, *args, **kwargs):
if self.dry_run:
pretty_args = ", ".join(
[repr(a) for a in args]
+ [f"{k}={v!r}" for k, v in kwargs.items()]
)
logger.debug(f"[dry-run: not invoking]: {f.__name__}({pretty_args})")
return default_
else:
return f(*args, **kwargs)
def _check_output(self, args: list[str], quiet: bool = False) -> bytes:
res = subprocess.run(args, capture_output=True)
@ -162,9 +177,8 @@ class Encoder:
return res.stdout
def check_output(self, args: list[str], has_side_effect=True, **kwargs) -> str:
if self.dry_run and has_side_effect:
logger.debug("not invoking because dry run: " + ' '.join(args))
return b""
if has_side_effect:
return self.destructive(b'', self._check_output, args, **kwargs)
else:
return self._check_output(args, **kwargs)
@ -173,17 +187,10 @@ class Encoder:
self.check_output(['cp', str(source), str(dest)])
def ensure_dir(self, dir: Path) -> None:
if self.dry_run:
logger.debug(f"not invoking because dry run: os.makedirs({dir!r}, exist_ok=True)")
else:
os.makedirs(str(dir), exist_ok=True)
self.destructive(None, os.makedirs, str(dir), exist_ok=True)
def remove(self, path: Path) -> None:
if self.dry_run:
logger.debug(f"not invoking because dry run: os.remove({path!r})")
else:
os.remove(path)
self.destructive(None, os.remove, path)
def convert(self, source: Path, dest: Path, target_samplerate: int | None) -> None:
assert dest.suffix == '.mp3', "conversion to a target other than mp3 not yet supported"
@ -194,6 +201,7 @@ class Encoder:
self.check_output([
'ffmpeg',
'-loglevel', 'warning',
'-y', # force overwrite
'-i', str(source),
'-codec:v', 'copy',
'-codec:a', 'libmp3lame',
@ -232,6 +240,12 @@ class Encoder:
# neither resampling nor transcoding -> simple copy will suffice
self.cp(source, dest)
# in all these cases, on success, synchronize the `mtime` to be in agreement
st = os.stat(source)
mtime = st.st_mtime
atime = datetime.datetime.now().timestamp()
self.destructive(None, os.utime, str(dest), (atime, mtime))
class Sync:
def __init__(self, encoder: Encoder, in_dir: str, out_dir: str, force_copy: bool = False):
self.encoder = encoder
@ -254,11 +268,12 @@ class Sync:
else:
return Path(str(n) + output_type)
def calculate_delta(self) -> tuple[set[Path], set[tuple[Path, Path]]]:
def calculate_delta(self) -> tuple[set[Path], set[tuple[Path, Path]], set[tuple[Path, Path]]]:
'''
Returns, as a tuple:
- dest files which need to be deleted
- files to copy (in-path/out-path pairs)
- new files to copy (in-path/out-path pairs)
- existing files which need to be updated (in-path/out-path pairs)
all returned paths are relative to in_dir/out_dir.
'''
@ -274,14 +289,35 @@ class Sync:
expected_out_files = in_out_map.values()
to_del = { f for f in existing_out_files if f not in expected_out_files }
to_del = {
f for f in existing_out_files
if f not in expected_out_files
}
logger.info(f'found {len(to_del)} files to delete')
to_copy = { (in_f, out_f) for (in_f, out_f) in in_out_map.items() if (self.force_copy or out_f not in existing_out_files) }
to_copy = {
(in_f, out_f) for (in_f, out_f) in in_out_map.items()
if out_f not in existing_out_files
}
logger.info(f'found {len(to_copy)} files to copy')
return to_del, to_copy
to_update = {
(in_f, out_f) for (in_f, out_f) in in_out_map.items()
if (in_f, out_f) not in to_copy and (self.force_copy or self.needs_update(in_f, out_f))
}
logger.info(f'found {len(to_update)} files to update')
def rm_dest_files(self, files: set[Path]) -> None:
return to_del, to_copy, to_update
def needs_update(self, src: Path, dest: Path) -> bool:
'''
files are relative to in_dir/out_dir
'''
src_stat = os.stat(self.in_dir / src)
dest_stat = os.stat(self.out_dir / dest)
return not approx_eq(src_stat.st_mtime, dest_stat.st_mtime, threshold=120.0)
def rm_dest_files(self, files: list[Path]) -> None:
'''
files are relative to out_dir
'''
@ -310,7 +346,7 @@ class Sync:
except Exception as e:
logger.error(f"task failed: {e}")
def cp_files(self, file_pairs: set[tuple[Path, Path]], jobs: int):
def cp_files(self, file_pairs: list[tuple[Path, Path]], jobs: int):
logger.info(f'using {jobs} jobs to copy {len(file_pairs)} files')
with concurrent.futures.ThreadPoolExecutor(max_workers=jobs) as executor:
for src_f, dest_f in file_pairs:
@ -329,10 +365,10 @@ def sync_all(
prefs = TranscodePreferences(compress=compress, compat=compat)
encoder = Encoder(prefs, dry_run=dry_run)
sync = Sync(encoder, in_dir, out_dir, force_copy=force_copy)
to_del, to_copy = sync.calculate_delta()
to_del, to_copy, to_update = sync.calculate_delta()
sync.rm_dest_files(to_del)
sync.cp_files(to_copy, jobs = jobs or multiprocessing.cpu_count())
sync.rm_dest_files(sorted(to_del))
sync.cp_files(sorted(to_copy) + sorted(to_update), jobs = jobs or multiprocessing.cpu_count())
def main() -> None:
logging.basicConfig()