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mutagen, musicbrainzngs, beets lib updates

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This commit is contained in:
Ade
2017-03-25 11:47:04 +13:00
parent f3020207c0
commit 4095bf213e
110 changed files with 17022 additions and 6397 deletions
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lib/beets/util/__init__.py
Regular → Executable
+415 -108
View File
@@ -1,5 +1,6 @@
# -*- coding: utf-8 -*-
# This file is part of beets.
# Copyright 2013, Adrian Sampson.
# Copyright 2016, Adrian Sampson.
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
@@ -13,21 +14,28 @@
# included in all copies or substantial portions of the Software.
"""Miscellaneous utility functions."""
from __future__ import division
from __future__ import division, absolute_import, print_function
import os
import sys
import errno
import locale
import re
import shutil
import fnmatch
from collections import defaultdict
from collections import Counter
import traceback
import subprocess
import platform
import shlex
from beets.util import hidden
import six
from unidecode import unidecode
MAX_FILENAME_LENGTH = 200
WINDOWS_MAGIC_PREFIX = u'\\\\?\\'
SNI_SUPPORTED = sys.version_info >= (2, 7, 9)
class HumanReadableException(Exception):
@@ -54,22 +62,22 @@ class HumanReadableException(Exception):
def _gerund(self):
"""Generate a (likely) gerund form of the English verb.
"""
if ' ' in self.verb:
if u' ' in self.verb:
return self.verb
gerund = self.verb[:-1] if self.verb.endswith('e') else self.verb
gerund += 'ing'
gerund = self.verb[:-1] if self.verb.endswith(u'e') else self.verb
gerund += u'ing'
return gerund
def _reasonstr(self):
"""Get the reason as a string."""
if isinstance(self.reason, unicode):
if isinstance(self.reason, six.text_type):
return self.reason
elif isinstance(self.reason, basestring): # Byte string.
return self.reason.decode('utf8', 'ignore')
elif isinstance(self.reason, bytes):
return self.reason.decode('utf-8', 'ignore')
elif hasattr(self.reason, 'strerror'): # i.e., EnvironmentError
return self.reason.strerror
else:
return u'"{0}"'.format(unicode(self.reason))
return u'"{0}"'.format(six.text_type(self.reason))
def get_message(self):
"""Create the human-readable description of the error, sans
@@ -83,7 +91,7 @@ class HumanReadableException(Exception):
"""
if self.tb:
logger.debug(self.tb)
logger.error(u'{0}: {1}'.format(self.error_kind, self.args[0]))
logger.error(u'{0}: {1}', self.error_kind, self.args[0])
class FilesystemError(HumanReadableException):
@@ -149,21 +157,22 @@ def ancestry(path):
return out
def sorted_walk(path, ignore=(), logger=None):
def sorted_walk(path, ignore=(), ignore_hidden=False, logger=None):
"""Like `os.walk`, but yields things in case-insensitive sorted,
breadth-first order. Directory and file names matching any glob
pattern in `ignore` are skipped. If `logger` is provided, then
warning messages are logged there when a directory cannot be listed.
"""
# Make sure the path isn't a Unicode string.
# Make sure the pathes aren't Unicode strings.
path = bytestring_path(path)
ignore = [bytestring_path(i) for i in ignore]
# Get all the directories and files at this level.
try:
contents = os.listdir(syspath(path))
except OSError as exc:
if logger:
logger.warn(u'could not list directory {0}: {1}'.format(
logger.warning(u'could not list directory {0}: {1}'.format(
displayable_path(path), exc.strerror
))
return
@@ -183,10 +192,11 @@ def sorted_walk(path, ignore=(), logger=None):
# Add to output as either a file or a directory.
cur = os.path.join(path, base)
if os.path.isdir(syspath(cur)):
dirs.append(base)
else:
files.append(base)
if (ignore_hidden and not hidden.is_hidden(cur)) or not ignore_hidden:
if os.path.isdir(syspath(cur)):
dirs.append(base)
else:
files.append(base)
# Sort lists (case-insensitive) and yield the current level.
dirs.sort(key=bytes.lower)
@@ -197,7 +207,7 @@ def sorted_walk(path, ignore=(), logger=None):
for base in dirs:
cur = os.path.join(path, base)
# yield from sorted_walk(...)
for res in sorted_walk(cur, ignore, logger):
for res in sorted_walk(cur, ignore, ignore_hidden, logger):
yield res
@@ -260,7 +270,9 @@ def prune_dirs(path, root=None, clutter=('.DS_Store', 'Thumbs.db')):
if not os.path.exists(directory):
# Directory gone already.
continue
if fnmatch_all(os.listdir(directory), clutter):
clutter = [bytestring_path(c) for c in clutter]
match_paths = [bytestring_path(d) for d in os.listdir(directory)]
if fnmatch_all(match_paths, clutter):
# Directory contains only clutter (or nothing).
try:
shutil.rmtree(directory)
@@ -294,6 +306,18 @@ def components(path):
return comps
def arg_encoding():
"""Get the encoding for command-line arguments (and other OS
locale-sensitive strings).
"""
try:
return locale.getdefaultlocale()[1] or 'utf-8'
except ValueError:
# Invalid locale environment variable setting. To avoid
# failing entirely for no good reason, assume UTF-8.
return 'utf-8'
def _fsencoding():
"""Get the system's filesystem encoding. On Windows, this is always
UTF-8 (not MBCS).
@@ -305,16 +329,16 @@ def _fsencoding():
# for Windows paths, so the encoding is actually immaterial so
# we can avoid dealing with this nastiness. We arbitrarily
# choose UTF-8.
encoding = 'utf8'
encoding = 'utf-8'
return encoding
def bytestring_path(path):
"""Given a path, which is either a str or a unicode, returns a str
"""Given a path, which is either a bytes or a unicode, returns a str
path (ensuring that we never deal with Unicode pathnames).
"""
# Pass through bytestrings.
if isinstance(path, str):
if isinstance(path, bytes):
return path
# On Windows, remove the magic prefix added by `syspath`. This makes
@@ -323,11 +347,14 @@ def bytestring_path(path):
if os.path.__name__ == 'ntpath' and path.startswith(WINDOWS_MAGIC_PREFIX):
path = path[len(WINDOWS_MAGIC_PREFIX):]
# Try to encode with default encodings, but fall back to UTF8.
# Try to encode with default encodings, but fall back to utf-8.
try:
return path.encode(_fsencoding())
except (UnicodeError, LookupError):
return path.encode('utf8')
return path.encode('utf-8')
PATH_SEP = bytestring_path(os.sep)
def displayable_path(path, separator=u'; '):
@@ -337,16 +364,16 @@ def displayable_path(path, separator=u'; '):
"""
if isinstance(path, (list, tuple)):
return separator.join(displayable_path(p) for p in path)
elif isinstance(path, unicode):
elif isinstance(path, six.text_type):
return path
elif not isinstance(path, str):
elif not isinstance(path, bytes):
# A non-string object: just get its unicode representation.
return unicode(path)
return six.text_type(path)
try:
return path.decode(_fsencoding(), 'ignore')
except (UnicodeError, LookupError):
return path.decode('utf8', 'ignore')
return path.decode('utf-8', 'ignore')
def syspath(path, prefix=True):
@@ -360,12 +387,12 @@ def syspath(path, prefix=True):
if os.path.__name__ != 'ntpath':
return path
if not isinstance(path, unicode):
if not isinstance(path, six.text_type):
# Beets currently represents Windows paths internally with UTF-8
# arbitrarily. But earlier versions used MBCS because it is
# reported as the FS encoding by Windows. Try both.
try:
path = path.decode('utf8')
path = path.decode('utf-8')
except UnicodeError:
# The encoding should always be MBCS, Windows' broken
# Unicode representation.
@@ -412,7 +439,7 @@ def copy(path, dest, replace=False):
path = syspath(path)
dest = syspath(dest)
if not replace and os.path.exists(dest):
raise FilesystemError('file exists', 'copy', (path, dest))
raise FilesystemError(u'file exists', 'copy', (path, dest))
try:
shutil.copyfile(path, dest)
except (OSError, IOError) as exc:
@@ -433,8 +460,7 @@ def move(path, dest, replace=False):
path = syspath(path)
dest = syspath(dest)
if os.path.exists(dest) and not replace:
raise FilesystemError('file exists', 'rename', (path, dest),
traceback.format_exc())
raise FilesystemError(u'file exists', 'rename', (path, dest))
# First, try renaming the file.
try:
@@ -452,23 +478,52 @@ def move(path, dest, replace=False):
def link(path, dest, replace=False):
"""Create a symbolic link from path to `dest`. Raises an OSError if
`dest` already exists, unless `replace` is True. Does nothing if
`path` == `dest`."""
if (samefile(path, dest)):
`path` == `dest`.
"""
if samefile(path, dest):
return
path = syspath(path)
dest = syspath(dest)
if os.path.exists(dest) and not replace:
raise FilesystemError('file exists', 'rename', (path, dest),
traceback.format_exc())
if os.path.exists(syspath(dest)) and not replace:
raise FilesystemError(u'file exists', 'rename', (path, dest))
try:
os.symlink(path, dest)
except OSError:
raise FilesystemError('Operating system does not support symbolic '
'links.', 'link', (path, dest),
os.symlink(syspath(path), syspath(dest))
except NotImplementedError:
# raised on python >= 3.2 and Windows versions before Vista
raise FilesystemError(u'OS does not support symbolic links.'
'link', (path, dest), traceback.format_exc())
except OSError as exc:
# TODO: Windows version checks can be removed for python 3
if hasattr('sys', 'getwindowsversion'):
if sys.getwindowsversion()[0] < 6: # is before Vista
exc = u'OS does not support symbolic links.'
raise FilesystemError(exc, 'link', (path, dest),
traceback.format_exc())
def hardlink(path, dest, replace=False):
"""Create a hard link from path to `dest`. Raises an OSError if
`dest` already exists, unless `replace` is True. Does nothing if
`path` == `dest`.
"""
if samefile(path, dest):
return
if os.path.exists(syspath(dest)) and not replace:
raise FilesystemError(u'file exists', 'rename', (path, dest))
try:
os.link(syspath(path), syspath(dest))
except NotImplementedError:
raise FilesystemError(u'OS does not support hard links.'
'link', (path, dest), traceback.format_exc())
except OSError as exc:
if exc.errno == errno.EXDEV:
raise FilesystemError(u'Cannot hard link across devices.'
'link', (path, dest), traceback.format_exc())
else:
raise FilesystemError(exc, 'link', (path, dest),
traceback.format_exc())
def unique_path(path):
"""Returns a version of ``path`` that does not exist on the
filesystem. Specifically, if ``path` itself already exists, then
@@ -478,7 +533,7 @@ def unique_path(path):
return path
base, ext = os.path.splitext(path)
match = re.search(r'\.(\d)+$', base)
match = re.search(br'\.(\d)+$', base)
if match:
num = int(match.group(1))
base = base[:match.start()]
@@ -486,7 +541,8 @@ def unique_path(path):
num = 0
while True:
num += 1
new_path = '%s.%i%s' % (base, num, ext)
suffix = u'.{}'.format(num).encode() + ext
new_path = base + suffix
if not os.path.exists(new_path):
return new_path
@@ -495,12 +551,12 @@ def unique_path(path):
# shares, which are sufficiently common as to cause frequent problems.
# http://msdn.microsoft.com/en-us/library/windows/desktop/aa365247.aspx
CHAR_REPLACE = [
(re.compile(ur'[\\/]'), u'_'), # / and \ -- forbidden everywhere.
(re.compile(ur'^\.'), u'_'), # Leading dot (hidden files on Unix).
(re.compile(ur'[\x00-\x1f]'), u''), # Control characters.
(re.compile(ur'[<>:"\?\*\|]'), u'_'), # Windows "reserved characters".
(re.compile(ur'\.$'), u'_'), # Trailing dots.
(re.compile(ur'\s+$'), u''), # Trailing whitespace.
(re.compile(r'[\\/]'), u'_'), # / and \ -- forbidden everywhere.
(re.compile(r'^\.'), u'_'), # Leading dot (hidden files on Unix).
(re.compile(r'[\x00-\x1f]'), u''), # Control characters.
(re.compile(r'[<>:"\?\*\|]'), u'_'), # Windows "reserved characters".
(re.compile(r'\.$'), u'_'), # Trailing dots.
(re.compile(r'\s+$'), u''), # Trailing whitespace.
]
@@ -542,73 +598,142 @@ def truncate_path(path, length=MAX_FILENAME_LENGTH):
return os.path.join(*out)
def _legalize_stage(path, replacements, length, extension, fragment):
"""Perform a single round of path legalization steps
(sanitation/replacement, encoding from Unicode to bytes,
extension-appending, and truncation). Return the path (Unicode if
`fragment` is set, `bytes` otherwise) and whether truncation was
required.
"""
# Perform an initial sanitization including user replacements.
path = sanitize_path(path, replacements)
# Encode for the filesystem.
if not fragment:
path = bytestring_path(path)
# Preserve extension.
path += extension.lower()
# Truncate too-long components.
pre_truncate_path = path
path = truncate_path(path, length)
return path, path != pre_truncate_path
def legalize_path(path, replacements, length, extension, fragment):
"""Given a path-like Unicode string, produce a legal path. Return
the path and a flag indicating whether some replacements had to be
ignored (see below).
The legalization process (see `_legalize_stage`) consists of
applying the sanitation rules in `replacements`, encoding the string
to bytes (unless `fragment` is set), truncating components to
`length`, appending the `extension`.
This function performs up to three calls to `_legalize_stage` in
case truncation conflicts with replacements (as can happen when
truncation creates whitespace at the end of the string, for
example). The limited number of iterations iterations avoids the
possibility of an infinite loop of sanitation and truncation
operations, which could be caused by replacement rules that make the
string longer. The flag returned from this function indicates that
the path has to be truncated twice (indicating that replacements
made the string longer again after it was truncated); the
application should probably log some sort of warning.
"""
if fragment:
# Outputting Unicode.
extension = extension.decode('utf-8', 'ignore')
first_stage_path, _ = _legalize_stage(
path, replacements, length, extension, fragment
)
# Convert back to Unicode with extension removed.
first_stage_path, _ = os.path.splitext(displayable_path(first_stage_path))
# Re-sanitize following truncation (including user replacements).
second_stage_path, retruncated = _legalize_stage(
first_stage_path, replacements, length, extension, fragment
)
# If the path was once again truncated, discard user replacements
# and run through one last legalization stage.
if retruncated:
second_stage_path, _ = _legalize_stage(
first_stage_path, None, length, extension, fragment
)
return second_stage_path, retruncated
def py3_path(path):
"""Convert a bytestring path to Unicode on Python 3 only. On Python
2, return the bytestring path unchanged.
This helps deal with APIs on Python 3 that *only* accept Unicode
(i.e., `str` objects). I philosophically disagree with this
decision, because paths are sadly bytes on Unix, but that's the way
it is. So this function helps us "smuggle" the true bytes data
through APIs that took Python 3's Unicode mandate too seriously.
"""
if isinstance(path, six.text_type):
return path
assert isinstance(path, bytes)
if six.PY2:
return path
return os.fsdecode(path)
def str2bool(value):
"""Returns a boolean reflecting a human-entered string."""
if value.lower() in ('yes', '1', 'true', 't', 'y'):
return True
else:
return False
return value.lower() in (u'yes', u'1', u'true', u't', u'y')
def as_string(value):
"""Convert a value to a Unicode object for matching with a query.
None becomes the empty string. Bytestrings are silently decoded.
"""
if six.PY2:
buffer_types = buffer, memoryview # noqa: F821
else:
buffer_types = memoryview
if value is None:
return u''
elif isinstance(value, buffer):
return str(value).decode('utf8', 'ignore')
elif isinstance(value, str):
return value.decode('utf8', 'ignore')
elif isinstance(value, buffer_types):
return bytes(value).decode('utf-8', 'ignore')
elif isinstance(value, bytes):
return value.decode('utf-8', 'ignore')
else:
return unicode(value)
return six.text_type(value)
def levenshtein(s1, s2):
"""A nice DP edit distance implementation from Wikibooks:
http://en.wikibooks.org/wiki/Algorithm_implementation/Strings/
Levenshtein_distance#Python
def text_string(value, encoding='utf-8'):
"""Convert a string, which can either be bytes or unicode, to
unicode.
Text (unicode) is left untouched; bytes are decoded. This is useful
to convert from a "native string" (bytes on Python 2, str on Python
3) to a consistently unicode value.
"""
if len(s1) < len(s2):
return levenshtein(s2, s1)
if not s1:
return len(s2)
previous_row = xrange(len(s2) + 1)
for i, c1 in enumerate(s1):
current_row = [i + 1]
for j, c2 in enumerate(s2):
insertions = previous_row[j + 1] + 1
deletions = current_row[j] + 1
substitutions = previous_row[j] + (c1 != c2)
current_row.append(min(insertions, deletions, substitutions))
previous_row = current_row
return previous_row[-1]
if isinstance(value, bytes):
return value.decode(encoding)
return value
def plurality(objs):
"""Given a sequence of comparable objects, returns the object that
is most common in the set and the frequency of that object. The
"""Given a sequence of hashble objects, returns the object that
is most common in the set and the its number of appearance. The
sequence must contain at least one object.
"""
# Calculate frequencies.
freqs = defaultdict(int)
for obj in objs:
freqs[obj] += 1
if not freqs:
raise ValueError('sequence must be non-empty')
# Find object with maximum frequency.
max_freq = 0
res = None
for obj, freq in freqs.items():
if freq > max_freq:
max_freq = freq
res = obj
return res, max_freq
c = Counter(objs)
if not c:
raise ValueError(u'sequence must be non-empty')
return c.most_common(1)[0]
def cpu_count():
@@ -624,8 +749,8 @@ def cpu_count():
num = 0
elif sys.platform == 'darwin':
try:
num = int(command_output(['sysctl', '-n', 'hw.ncpu']))
except ValueError:
num = int(command_output(['/usr/sbin/sysctl', '-n', 'hw.ncpu']))
except (ValueError, OSError, subprocess.CalledProcessError):
num = 0
else:
try:
@@ -638,21 +763,40 @@ def cpu_count():
return 1
def convert_command_args(args):
"""Convert command arguments to bytestrings on Python 2 and
surrogate-escaped strings on Python 3."""
assert isinstance(args, list)
def convert(arg):
if six.PY2:
if isinstance(arg, six.text_type):
arg = arg.encode(arg_encoding())
else:
if isinstance(arg, bytes):
arg = arg.decode(arg_encoding(), 'surrogateescape')
return arg
return [convert(a) for a in args]
def command_output(cmd, shell=False):
"""Runs the command and returns its output after it has exited.
``cmd`` is a list of arguments starting with the command names. If
``shell`` is true, ``cmd`` is assumed to be a string and passed to a
``cmd`` is a list of arguments starting with the command names. The
arguments are bytes on Unix and strings on Windows.
If ``shell`` is true, ``cmd`` is assumed to be a string and passed to a
shell to execute.
If the process exits with a non-zero return code
``subprocess.CalledProcessError`` is raised. May also raise
``OSError``.
This replaces `subprocess.check_output`, which isn't available in
Python 2.6 and which can have problems if lots of output is sent to
stderr.
This replaces `subprocess.check_output` which can have problems if lots of
output is sent to stderr.
"""
cmd = convert_command_args(cmd)
proc = subprocess.Popen(
cmd,
stdout=subprocess.PIPE,
@@ -665,6 +809,7 @@ def command_output(cmd, shell=False):
raise subprocess.CalledProcessError(
returncode=proc.returncode,
cmd=' '.join(cmd),
output=stdout + stderr,
)
return stdout
@@ -684,3 +829,165 @@ def max_filename_length(path, limit=MAX_FILENAME_LENGTH):
return min(res[9], limit)
else:
return limit
def open_anything():
"""Return the system command that dispatches execution to the correct
program.
"""
sys_name = platform.system()
if sys_name == 'Darwin':
base_cmd = 'open'
elif sys_name == 'Windows':
base_cmd = 'start'
else: # Assume Unix
base_cmd = 'xdg-open'
return base_cmd
def editor_command():
"""Get a command for opening a text file.
Use the `EDITOR` environment variable by default. If it is not
present, fall back to `open_anything()`, the platform-specific tool
for opening files in general.
"""
editor = os.environ.get('EDITOR')
if editor:
return editor
return open_anything()
def shlex_split(s):
"""Split a Unicode or bytes string according to shell lexing rules.
Raise `ValueError` if the string is not a well-formed shell string.
This is a workaround for a bug in some versions of Python.
"""
if not six.PY2 or isinstance(s, bytes): # Shlex works fine.
return shlex.split(s)
elif isinstance(s, six.text_type):
# Work around a Python bug.
# http://bugs.python.org/issue6988
bs = s.encode('utf-8')
return [c.decode('utf-8') for c in shlex.split(bs)]
else:
raise TypeError(u'shlex_split called with non-string')
def interactive_open(targets, command):
"""Open the files in `targets` by `exec`ing a new `command`, given
as a Unicode string. (The new program takes over, and Python
execution ends: this does not fork a subprocess.)
Can raise `OSError`.
"""
assert command
# Split the command string into its arguments.
try:
args = shlex_split(command)
except ValueError: # Malformed shell tokens.
args = [command]
args.insert(0, args[0]) # for argv[0]
args += targets
return os.execlp(*args)
def _windows_long_path_name(short_path):
"""Use Windows' `GetLongPathNameW` via ctypes to get the canonical,
long path given a short filename.
"""
if not isinstance(short_path, six.text_type):
short_path = short_path.decode(_fsencoding())
import ctypes
buf = ctypes.create_unicode_buffer(260)
get_long_path_name_w = ctypes.windll.kernel32.GetLongPathNameW
return_value = get_long_path_name_w(short_path, buf, 260)
if return_value == 0 or return_value > 260:
# An error occurred
return short_path
else:
long_path = buf.value
# GetLongPathNameW does not change the case of the drive
# letter.
if len(long_path) > 1 and long_path[1] == ':':
long_path = long_path[0].upper() + long_path[1:]
return long_path
def case_sensitive(path):
"""Check whether the filesystem at the given path is case sensitive.
To work best, the path should point to a file or a directory. If the path
does not exist, assume a case sensitive file system on every platform
except Windows.
"""
# A fallback in case the path does not exist.
if not os.path.exists(syspath(path)):
# By default, the case sensitivity depends on the platform.
return platform.system() != 'Windows'
# If an upper-case version of the path exists but a lower-case
# version does not, then the filesystem must be case-sensitive.
# (Otherwise, we have more work to do.)
if not (os.path.exists(syspath(path.lower())) and
os.path.exists(syspath(path.upper()))):
return True
# Both versions of the path exist on the file system. Check whether
# they refer to different files by their inodes. Alas,
# `os.path.samefile` is only available on Unix systems on Python 2.
if platform.system() != 'Windows':
return not os.path.samefile(syspath(path.lower()),
syspath(path.upper()))
# On Windows, we check whether the canonical, long filenames for the
# files are the same.
lower = _windows_long_path_name(path.lower())
upper = _windows_long_path_name(path.upper())
return lower != upper
def raw_seconds_short(string):
"""Formats a human-readable M:SS string as a float (number of seconds).
Raises ValueError if the conversion cannot take place due to `string` not
being in the right format.
"""
match = re.match(r'^(\d+):([0-5]\d)$', string)
if not match:
raise ValueError(u'String not in M:SS format')
minutes, seconds = map(int, match.groups())
return float(minutes * 60 + seconds)
def asciify_path(path, sep_replace):
"""Decodes all unicode characters in a path into ASCII equivalents.
Substitutions are provided by the unidecode module. Path separators in the
input are preserved.
Keyword arguments:
path -- The path to be asciified.
sep_replace -- the string to be used to replace extraneous path separators.
"""
# if this platform has an os.altsep, change it to os.sep.
if os.altsep:
path = path.replace(os.altsep, os.sep)
path_components = path.split(os.sep)
for index, item in enumerate(path_components):
path_components[index] = unidecode(item).replace(os.sep, sep_replace)
if os.altsep:
path_components[index] = unidecode(item).replace(
os.altsep,
sep_replace
)
return os.sep.join(path_components)