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File Content: `filelist.py`

"""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.
        """
        # XXX docstring lying about what the special chars are?
        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 (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)
Name	Size	Permission
__pycache__	---	0755
command	---	0755
README	295 bytes	0644
__init__.py	236 bytes	0644
archive_util.py	7945 bytes	0644
bcppcompiler.py	14935 bytes	0644
ccompiler.py	47383 bytes	0644
cmd.py	19147 bytes	0644
config.py	4874 bytes	0644
core.py	8909 bytes	0644
cygwinccompiler.py	16474 bytes	0644
debug.py	139 bytes	0644
dep_util.py	3491 bytes	0644
dir_util.py	7778 bytes	0644
dist.py	49786 bytes	0644
errors.py	3577 bytes	0644
extension.py	10335 bytes	0644
fancy_getopt.py	17784 bytes	0644
file_util.py	8148 bytes	0644
filelist.py	12720 bytes	0644
log.py	1908 bytes	0644
msvc9compiler.py	30515 bytes	0644
msvccompiler.py	23479 bytes	0644
spawn.py	7514 bytes	0644
sysconfig.py	21338 bytes	0644
text_file.py	12487 bytes	0644
unixccompiler.py	13653 bytes	0644
util.py	20665 bytes	0644
version.py	12479 bytes	0644
versionpredicate.py	5132 bytes	0644
File Content: filelist.py

File Content: `filelist.py`
