227 lines
7.9 KiB
Python
227 lines
7.9 KiB
Python
"""distutils.dir_util
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Utility functions for manipulating directories and directory trees."""
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# This module should be kept compatible with Python 2.1.
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__revision__ = "$Id: dir_util.py 39416 2005-08-26 15:20:46Z tim_one $"
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import os, sys
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from types import *
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from distutils.errors import DistutilsFileError, DistutilsInternalError
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from distutils import log
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# cache for by mkpath() -- in addition to cheapening redundant calls,
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# eliminates redundant "creating /foo/bar/baz" messages in dry-run mode
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_path_created = {}
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# I don't use os.makedirs because a) it's new to Python 1.5.2, and
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# b) it blows up if the directory already exists (I want to silently
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# succeed in that case).
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def mkpath (name, mode=0777, verbose=0, dry_run=0):
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"""Create a directory and any missing ancestor directories. If the
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directory already exists (or if 'name' is the empty string, which
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means the current directory, which of course exists), then do
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nothing. Raise DistutilsFileError if unable to create some
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directory along the way (eg. some sub-path exists, but is a file
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rather than a directory). If 'verbose' is true, print a one-line
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summary of each mkdir to stdout. Return the list of directories
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actually created."""
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global _path_created
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# Detect a common bug -- name is None
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if not isinstance(name, StringTypes):
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raise DistutilsInternalError, \
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"mkpath: 'name' must be a string (got %r)" % (name,)
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# XXX what's the better way to handle verbosity? print as we create
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# each directory in the path (the current behaviour), or only announce
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# the creation of the whole path? (quite easy to do the latter since
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# we're not using a recursive algorithm)
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name = os.path.normpath(name)
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created_dirs = []
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if os.path.isdir(name) or name == '':
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return created_dirs
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if _path_created.get(os.path.abspath(name)):
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return created_dirs
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(head, tail) = os.path.split(name)
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tails = [tail] # stack of lone dirs to create
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while head and tail and not os.path.isdir(head):
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#print "splitting '%s': " % head,
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(head, tail) = os.path.split(head)
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#print "to ('%s','%s')" % (head, tail)
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tails.insert(0, tail) # push next higher dir onto stack
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#print "stack of tails:", tails
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# now 'head' contains the deepest directory that already exists
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# (that is, the child of 'head' in 'name' is the highest directory
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# that does *not* exist)
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for d in tails:
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#print "head = %s, d = %s: " % (head, d),
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head = os.path.join(head, d)
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abs_head = os.path.abspath(head)
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if _path_created.get(abs_head):
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continue
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log.info("creating %s", head)
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if not dry_run:
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try:
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os.mkdir(head)
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created_dirs.append(head)
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except OSError, exc:
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raise DistutilsFileError, \
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"could not create '%s': %s" % (head, exc[-1])
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_path_created[abs_head] = 1
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return created_dirs
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# mkpath ()
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def create_tree (base_dir, files, mode=0777, verbose=0, dry_run=0):
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"""Create all the empty directories under 'base_dir' needed to
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put 'files' there. 'base_dir' is just the a name of a directory
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which doesn't necessarily exist yet; 'files' is a list of filenames
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to be interpreted relative to 'base_dir'. 'base_dir' + the
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directory portion of every file in 'files' will be created if it
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doesn't already exist. 'mode', 'verbose' and 'dry_run' flags are as
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for 'mkpath()'."""
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# First get the list of directories to create
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need_dir = {}
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for file in files:
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need_dir[os.path.join(base_dir, os.path.dirname(file))] = 1
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need_dirs = need_dir.keys()
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need_dirs.sort()
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# Now create them
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for dir in need_dirs:
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mkpath(dir, mode, dry_run=dry_run)
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# create_tree ()
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def copy_tree (src, dst,
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preserve_mode=1,
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preserve_times=1,
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preserve_symlinks=0,
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update=0,
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verbose=0,
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dry_run=0):
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"""Copy an entire directory tree 'src' to a new location 'dst'. Both
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'src' and 'dst' must be directory names. If 'src' is not a
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directory, raise DistutilsFileError. If 'dst' does not exist, it is
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created with 'mkpath()'. The end result of the copy is that every
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file in 'src' is copied to 'dst', and directories under 'src' are
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recursively copied to 'dst'. Return the list of files that were
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copied or might have been copied, using their output name. The
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return value is unaffected by 'update' or 'dry_run': it is simply
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the list of all files under 'src', with the names changed to be
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under 'dst'.
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'preserve_mode' and 'preserve_times' are the same as for
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'copy_file'; note that they only apply to regular files, not to
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directories. If 'preserve_symlinks' is true, symlinks will be
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copied as symlinks (on platforms that support them!); otherwise
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(the default), the destination of the symlink will be copied.
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'update' and 'verbose' are the same as for 'copy_file'."""
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from distutils.file_util import copy_file
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if not dry_run and not os.path.isdir(src):
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raise DistutilsFileError, \
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"cannot copy tree '%s': not a directory" % src
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try:
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names = os.listdir(src)
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except os.error, (errno, errstr):
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if dry_run:
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names = []
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else:
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raise DistutilsFileError, \
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"error listing files in '%s': %s" % (src, errstr)
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if not dry_run:
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mkpath(dst)
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outputs = []
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for n in names:
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src_name = os.path.join(src, n)
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dst_name = os.path.join(dst, n)
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if preserve_symlinks and os.path.islink(src_name):
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link_dest = os.readlink(src_name)
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log.info("linking %s -> %s", dst_name, link_dest)
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if not dry_run:
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os.symlink(link_dest, dst_name)
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outputs.append(dst_name)
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elif os.path.isdir(src_name):
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outputs.extend(
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copy_tree(src_name, dst_name, preserve_mode,
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preserve_times, preserve_symlinks, update,
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dry_run=dry_run))
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else:
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copy_file(src_name, dst_name, preserve_mode,
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preserve_times, update, dry_run=dry_run)
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outputs.append(dst_name)
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return outputs
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# copy_tree ()
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# Helper for remove_tree()
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def _build_cmdtuple(path, cmdtuples):
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for f in os.listdir(path):
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real_f = os.path.join(path,f)
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if os.path.isdir(real_f) and not os.path.islink(real_f):
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_build_cmdtuple(real_f, cmdtuples)
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else:
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cmdtuples.append((os.remove, real_f))
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cmdtuples.append((os.rmdir, path))
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def remove_tree (directory, verbose=0, dry_run=0):
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"""Recursively remove an entire directory tree. Any errors are ignored
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(apart from being reported to stdout if 'verbose' is true).
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"""
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from distutils.util import grok_environment_error
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global _path_created
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log.info("removing '%s' (and everything under it)", directory)
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if dry_run:
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return
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cmdtuples = []
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_build_cmdtuple(directory, cmdtuples)
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for cmd in cmdtuples:
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try:
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apply(cmd[0], (cmd[1],))
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# remove dir from cache if it's already there
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abspath = os.path.abspath(cmd[1])
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if _path_created.has_key(abspath):
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del _path_created[abspath]
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except (IOError, OSError), exc:
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log.warn(grok_environment_error(
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exc, "error removing %s: " % directory))
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def ensure_relative (path):
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"""Take the full path 'path', and make it a relative path so
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it can be the second argument to os.path.join().
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"""
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drive, path = os.path.splitdrive(path)
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if sys.platform == 'mac':
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return os.sep + path
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else:
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if path[0:1] == os.sep:
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path = drive + path[1:]
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return path
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