cpython/Lib/distutils/filelist.py

323 lines
12 KiB
Python

"""distutils.filelist
Provides the FileList class, used for poking about the filesystem
and building lists of files.
"""
import os, re
import fnmatch
from distutils.util import convert_path
from distutils.errors import DistutilsTemplateError, DistutilsInternalError
from distutils import log
class FileList:
"""A list of files built by on exploring the filesystem and filtered by
applying various patterns to what we find there.
Instance attributes:
dir
directory from which files will be taken -- only used if
'allfiles' not supplied to constructor
files
list of filenames currently being built/filtered/manipulated
allfiles
complete list of files under consideration (ie. without any
filtering applied)
"""
def __init__(self, warn=None, debug_print=None):
# ignore argument to FileList, but keep them for backwards
# compatibility
self.allfiles = None
self.files = []
def set_allfiles(self, allfiles):
self.allfiles = allfiles
def findall(self, dir=os.curdir):
self.allfiles = findall(dir)
def debug_print(self, msg):
"""Print 'msg' to stdout if the global DEBUG (taken from the
DISTUTILS_DEBUG environment variable) flag is true.
"""
from distutils.debug import DEBUG
if DEBUG:
print(msg)
# -- List-like methods ---------------------------------------------
def append(self, item):
self.files.append(item)
def extend(self, items):
self.files.extend(items)
def sort(self):
# Not a strict lexical sort!
sortable_files = sorted(map(os.path.split, self.files))
self.files = []
for sort_tuple in sortable_files:
self.files.append(os.path.join(*sort_tuple))
# -- Other miscellaneous utility methods ---------------------------
def remove_duplicates(self):
# Assumes list has been sorted!
for i in range(len(self.files) - 1, 0, -1):
if self.files[i] == self.files[i - 1]:
del self.files[i]
# -- "File template" methods ---------------------------------------
def _parse_template_line(self, line):
words = line.split()
action = words[0]
patterns = dir = dir_pattern = None
if action in ('include', 'exclude',
'global-include', 'global-exclude'):
if len(words) < 2:
raise DistutilsTemplateError(
"'%s' expects <pattern1> <pattern2> ..." % action)
patterns = [convert_path(w) for w in words[1:]]
elif action in ('recursive-include', 'recursive-exclude'):
if len(words) < 3:
raise DistutilsTemplateError(
"'%s' expects <dir> <pattern1> <pattern2> ..." % action)
dir = convert_path(words[1])
patterns = [convert_path(w) for w in words[2:]]
elif action in ('graft', 'prune'):
if len(words) != 2:
raise DistutilsTemplateError(
"'%s' expects a single <dir_pattern>" % action)
dir_pattern = convert_path(words[1])
else:
raise DistutilsTemplateError("unknown action '%s'" % action)
return (action, patterns, dir, dir_pattern)
def process_template_line(self, line):
# Parse the line: split it up, make sure the right number of words
# is there, and return the relevant words. 'action' is always
# defined: it's the first word of the line. Which of the other
# three are defined depends on the action; it'll be either
# patterns, (dir and patterns), or (dir_pattern).
(action, patterns, dir, dir_pattern) = self._parse_template_line(line)
# OK, now we know that the action is valid and we have the
# right number of words on the line for that action -- so we
# can proceed with minimal error-checking.
if action == 'include':
self.debug_print("include " + ' '.join(patterns))
for pattern in patterns:
if not self.include_pattern(pattern, anchor=1):
log.warn("warning: no files found matching '%s'",
pattern)
elif action == 'exclude':
self.debug_print("exclude " + ' '.join(patterns))
for pattern in patterns:
if not self.exclude_pattern(pattern, anchor=1):
log.warn(("warning: no previously-included files "
"found matching '%s'"), pattern)
elif action == 'global-include':
self.debug_print("global-include " + ' '.join(patterns))
for pattern in patterns:
if not self.include_pattern(pattern, anchor=0):
log.warn(("warning: no files found matching '%s' "
"anywhere in distribution"), pattern)
elif action == 'global-exclude':
self.debug_print("global-exclude " + ' '.join(patterns))
for pattern in patterns:
if not self.exclude_pattern(pattern, anchor=0):
log.warn(("warning: no previously-included files matching "
"'%s' found anywhere in distribution"),
pattern)
elif action == 'recursive-include':
self.debug_print("recursive-include %s %s" %
(dir, ' '.join(patterns)))
for pattern in patterns:
if not self.include_pattern(pattern, prefix=dir):
log.warn(("warning: no files found matching '%s' "
"under directory '%s'"),
pattern, dir)
elif action == 'recursive-exclude':
self.debug_print("recursive-exclude %s %s" %
(dir, ' '.join(patterns)))
for pattern in patterns:
if not self.exclude_pattern(pattern, prefix=dir):
log.warn(("warning: no previously-included files matching "
"'%s' found under directory '%s'"),
pattern, dir)
elif action == 'graft':
self.debug_print("graft " + dir_pattern)
if not self.include_pattern(None, prefix=dir_pattern):
log.warn("warning: no directories found matching '%s'",
dir_pattern)
elif action == 'prune':
self.debug_print("prune " + dir_pattern)
if not self.exclude_pattern(None, prefix=dir_pattern):
log.warn(("no previously-included directories found "
"matching '%s'"), dir_pattern)
else:
raise DistutilsInternalError(
"this cannot happen: invalid action '%s'" % action)
# -- Filtering/selection methods -----------------------------------
def include_pattern(self, pattern, anchor=1, prefix=None, is_regex=0):
"""Select strings (presumably filenames) from 'self.files' that
match 'pattern', a Unix-style wildcard (glob) pattern. Patterns
are not quite the same as implemented by the 'fnmatch' module: '*'
and '?' match non-special characters, where "special" is platform-
dependent: slash on Unix; colon, slash, and backslash on
DOS/Windows; and colon on Mac OS.
If 'anchor' is true (the default), then the pattern match is more
stringent: "*.py" will match "foo.py" but not "foo/bar.py". If
'anchor' is false, both of these will match.
If 'prefix' is supplied, then only filenames starting with 'prefix'
(itself a pattern) and ending with 'pattern', with anything in between
them, will match. 'anchor' is ignored in this case.
If 'is_regex' is true, 'anchor' and 'prefix' are ignored, and
'pattern' is assumed to be either a string containing a regex or a
regex object -- no translation is done, the regex is just compiled
and used as-is.
Selected strings will be added to self.files.
Return True if files are found, False otherwise.
"""
files_found = False
pattern_re = translate_pattern(pattern, anchor, prefix, is_regex)
self.debug_print("include_pattern: applying regex r'%s'" %
pattern_re.pattern)
# delayed loading of allfiles list
if self.allfiles is None:
self.findall()
for name in self.allfiles:
if pattern_re.search(name):
self.debug_print(" adding " + name)
self.files.append(name)
files_found = True
return files_found
def exclude_pattern (self, pattern,
anchor=1, prefix=None, is_regex=0):
"""Remove strings (presumably filenames) from 'files' that match
'pattern'. Other parameters are the same as for
'include_pattern()', above.
The list 'self.files' is modified in place.
Return True if files are found, False otherwise.
"""
files_found = False
pattern_re = translate_pattern(pattern, anchor, prefix, is_regex)
self.debug_print("exclude_pattern: applying regex r'%s'" %
pattern_re.pattern)
for i in range(len(self.files)-1, -1, -1):
if pattern_re.search(self.files[i]):
self.debug_print(" removing " + self.files[i])
del self.files[i]
files_found = True
return files_found
# ----------------------------------------------------------------------
# Utility functions
def findall(dir=os.curdir):
"""Find all files under 'dir' and return the list of full filenames
(relative to 'dir').
"""
from stat import ST_MODE, S_ISREG, S_ISDIR, S_ISLNK
list = []
stack = [dir]
pop = stack.pop
push = stack.append
while stack:
dir = pop()
names = os.listdir(dir)
for name in names:
if dir != os.curdir: # avoid the dreaded "./" syndrome
fullname = os.path.join(dir, name)
else:
fullname = name
# Avoid excess stat calls -- just one will do, thank you!
stat = os.stat(fullname)
mode = stat[ST_MODE]
if S_ISREG(mode):
list.append(fullname)
elif S_ISDIR(mode) and not S_ISLNK(mode):
push(fullname)
return list
def glob_to_re(pattern):
"""Translate a shell-like glob pattern to a regular expression; return
a string containing the regex. Differs from 'fnmatch.translate()' in
that '*' does not match "special characters" (which are
platform-specific).
"""
pattern_re = fnmatch.translate(pattern)
# '?' and '*' in the glob pattern become '.' and '.*' in the RE, which
# IMHO is wrong -- '?' and '*' aren't supposed to match slash in Unix,
# and by extension they shouldn't match such "special characters" under
# any OS. So change all non-escaped dots in the RE to match any
# character except the special characters.
# XXX currently the "special characters" are just slash -- i.e. this is
# Unix-only.
pattern_re = re.sub(r'((?<!\\)(\\\\)*)\.', r'\1[^/]', pattern_re)
return pattern_re
def translate_pattern(pattern, anchor=1, prefix=None, is_regex=0):
"""Translate a shell-like wildcard pattern to a compiled regular
expression. Return the compiled regex. If 'is_regex' true,
then 'pattern' is directly compiled to a regex (if it's a string)
or just returned as-is (assumes it's a regex object).
"""
if is_regex:
if isinstance(pattern, str):
return re.compile(pattern)
else:
return pattern
if pattern:
pattern_re = glob_to_re(pattern)
else:
pattern_re = ''
if prefix is not None:
# ditch end of pattern character
empty_pattern = glob_to_re('')
prefix_re = (glob_to_re(prefix))[:-len(empty_pattern)]
# paths should always use / in manifest templates
pattern_re = "^%s/.*%s" % (prefix_re, pattern_re)
else: # no prefix -- respect anchor flag
if anchor:
pattern_re = "^" + pattern_re
return re.compile(pattern_re)