Viewing file:  filelist.py (12.39 KB) -rw-r--r--
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"""distutils.filelist
Provides the FileList class, used for poking about the filesystem
and building lists of files.
"""
__revision__ = "$Id$"
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 = map(os.path.split, self.files)
sortable_files.sort()
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 = map(convert_path, 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 = map(convert_path, 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 1 if files are found.
"""
# XXX docstring lying about what the special chars are?
files_found = 0
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 = 1
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 1 if files are
found.
"""
files_found = 0
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 = 1
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 (currently: just os.sep).
sep = os.sep
if os.sep == '\\':
# we're using a regex to manipulate a regex, so we need
# to escape the backslash twice
sep = r'\\\\'
escaped = r'\1[^%s]' % sep
pattern_re = re.sub(r'((?<!\\)(\\\\)*)\.', escaped, 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)]
sep = os.sep
if os.sep == '\\':
sep = r'\\'
pattern_re = "^" + sep.join((prefix_re, ".*" + pattern_re))
else: # no prefix -- respect anchor flag
if anchor:
pattern_re = "^" + pattern_re
return re.compile(pattern_re)
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