ref: c789c054808dc3984abfb0d6b7de6d12e66471c2
dir: /sys/lib/python/distutils/dir_util.py/
"""distutils.dir_util
Utility functions for manipulating directories and directory trees."""
# This module should be kept compatible with Python 2.1.
__revision__ = "$Id: dir_util.py 39416 2005-08-26 15:20:46Z tim_one $"
import os, sys
from types import *
from distutils.errors import DistutilsFileError, DistutilsInternalError
from distutils import log
# cache for by mkpath() -- in addition to cheapening redundant calls,
# eliminates redundant "creating /foo/bar/baz" messages in dry-run mode
_path_created = {}
# I don't use os.makedirs because a) it's new to Python 1.5.2, and
# b) it blows up if the directory already exists (I want to silently
# succeed in that case).
def mkpath (name, mode=0777, verbose=0, dry_run=0):
"""Create a directory and any missing ancestor directories. If the
directory already exists (or if 'name' is the empty string, which
means the current directory, which of course exists), then do
nothing. Raise DistutilsFileError if unable to create some
directory along the way (eg. some sub-path exists, but is a file
rather than a directory). If 'verbose' is true, print a one-line
summary of each mkdir to stdout. Return the list of directories
actually created."""
global _path_created
# Detect a common bug -- name is None
if not isinstance(name, StringTypes):
raise DistutilsInternalError, \
"mkpath: 'name' must be a string (got %r)" % (name,)
# XXX what's the better way to handle verbosity? print as we create
# each directory in the path (the current behaviour), or only announce
# the creation of the whole path? (quite easy to do the latter since
# we're not using a recursive algorithm)
name = os.path.normpath(name)
created_dirs = []
if os.path.isdir(name) or name == '':
return created_dirs
if _path_created.get(os.path.abspath(name)):
return created_dirs
(head, tail) = os.path.split(name)
tails = [tail] # stack of lone dirs to create
while head and tail and not os.path.isdir(head):
#print "splitting '%s': " % head,
(head, tail) = os.path.split(head)
#print "to ('%s','%s')" % (head, tail)
tails.insert(0, tail) # push next higher dir onto stack
#print "stack of tails:", tails
# now 'head' contains the deepest directory that already exists
# (that is, the child of 'head' in 'name' is the highest directory
# that does *not* exist)
for d in tails:
#print "head = %s, d = %s: " % (head, d),
head = os.path.join(head, d)
abs_head = os.path.abspath(head)
if _path_created.get(abs_head):
continue
log.info("creating %s", head)
if not dry_run:
try:
os.mkdir(head)
created_dirs.append(head)
except OSError, exc:
raise DistutilsFileError, \
"could not create '%s': %s" % (head, exc[-1])
_path_created[abs_head] = 1
return created_dirs
# mkpath ()
def create_tree (base_dir, files, mode=0777, verbose=0, dry_run=0):
"""Create all the empty directories under 'base_dir' needed to
put 'files' there. 'base_dir' is just the a name of a directory
which doesn't necessarily exist yet; 'files' is a list of filenames
to be interpreted relative to 'base_dir'. 'base_dir' + the
directory portion of every file in 'files' will be created if it
doesn't already exist. 'mode', 'verbose' and 'dry_run' flags are as
for 'mkpath()'."""
# First get the list of directories to create
need_dir = {}
for file in files:
need_dir[os.path.join(base_dir, os.path.dirname(file))] = 1
need_dirs = need_dir.keys()
need_dirs.sort()
# Now create them
for dir in need_dirs:
mkpath(dir, mode, dry_run=dry_run)
# create_tree ()
def copy_tree (src, dst,
preserve_mode=1,
preserve_times=1,
preserve_symlinks=0,
update=0,
verbose=0,
dry_run=0):
"""Copy an entire directory tree 'src' to a new location 'dst'. Both
'src' and 'dst' must be directory names. If 'src' is not a
directory, raise DistutilsFileError. If 'dst' does not exist, it is
created with 'mkpath()'. The end result of the copy is that every
file in 'src' is copied to 'dst', and directories under 'src' are
recursively copied to 'dst'. Return the list of files that were
copied or might have been copied, using their output name. The
return value is unaffected by 'update' or 'dry_run': it is simply
the list of all files under 'src', with the names changed to be
under 'dst'.
'preserve_mode' and 'preserve_times' are the same as for
'copy_file'; note that they only apply to regular files, not to
directories. If 'preserve_symlinks' is true, symlinks will be
copied as symlinks (on platforms that support them!); otherwise
(the default), the destination of the symlink will be copied.
'update' and 'verbose' are the same as for 'copy_file'."""
from distutils.file_util import copy_file
if not dry_run and not os.path.isdir(src):
raise DistutilsFileError, \
"cannot copy tree '%s': not a directory" % src
try:
names = os.listdir(src)
except os.error, (errno, errstr):
if dry_run:
names = []
else:
raise DistutilsFileError, \
"error listing files in '%s': %s" % (src, errstr)
if not dry_run:
mkpath(dst)
outputs = []
for n in names:
src_name = os.path.join(src, n)
dst_name = os.path.join(dst, n)
if preserve_symlinks and os.path.islink(src_name):
link_dest = os.readlink(src_name)
log.info("linking %s -> %s", dst_name, link_dest)
if not dry_run:
os.symlink(link_dest, dst_name)
outputs.append(dst_name)
elif os.path.isdir(src_name):
outputs.extend(
copy_tree(src_name, dst_name, preserve_mode,
preserve_times, preserve_symlinks, update,
dry_run=dry_run))
else:
copy_file(src_name, dst_name, preserve_mode,
preserve_times, update, dry_run=dry_run)
outputs.append(dst_name)
return outputs
# copy_tree ()
# Helper for remove_tree()
def _build_cmdtuple(path, cmdtuples):
for f in os.listdir(path):
real_f = os.path.join(path,f)
if os.path.isdir(real_f) and not os.path.islink(real_f):
_build_cmdtuple(real_f, cmdtuples)
else:
cmdtuples.append((os.remove, real_f))
cmdtuples.append((os.rmdir, path))
def remove_tree (directory, verbose=0, dry_run=0):
"""Recursively remove an entire directory tree. Any errors are ignored
(apart from being reported to stdout if 'verbose' is true).
"""
from distutils.util import grok_environment_error
global _path_created
log.info("removing '%s' (and everything under it)", directory)
if dry_run:
return
cmdtuples = []
_build_cmdtuple(directory, cmdtuples)
for cmd in cmdtuples:
try:
apply(cmd[0], (cmd[1],))
# remove dir from cache if it's already there
abspath = os.path.abspath(cmd[1])
if _path_created.has_key(abspath):
del _path_created[abspath]
except (IOError, OSError), exc:
log.warn(grok_environment_error(
exc, "error removing %s: " % directory))
def ensure_relative (path):
"""Take the full path 'path', and make it a relative path so
it can be the second argument to os.path.join().
"""
drive, path = os.path.splitdrive(path)
if sys.platform == 'mac':
return os.sep + path
else:
if path[0:1] == os.sep:
path = drive + path[1:]
return path