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139 lines
4.0 KiB
139 lines
4.0 KiB
14 years ago
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"""Utility functions for copying files and directory trees.
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XXX The functions here don't copy the resource fork or other metadata on Mac.
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"""
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import os
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import sys
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import stat
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__all__ = ["copyfileobj","copyfile","copymode","copystat","copy","copy2",
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"copytree","rmtree"]
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def copyfileobj(fsrc, fdst, length=16*1024):
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"""copy data from file-like object fsrc to file-like object fdst"""
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while 1:
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buf = fsrc.read(length)
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if not buf:
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break
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fdst.write(buf)
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def copyfile(src, dst):
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"""Copy data from src to dst"""
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fsrc = None
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fdst = None
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try:
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fsrc = open(src, 'rb')
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fdst = open(dst, 'wb')
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copyfileobj(fsrc, fdst)
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finally:
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if fdst:
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fdst.close()
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if fsrc:
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fsrc.close()
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def copymode(src, dst):
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"""Copy mode bits from src to dst"""
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if hasattr(os, 'chmod'):
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st = os.stat(src)
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mode = stat.S_IMODE(st[stat.ST_MODE])
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os.chmod(dst, mode)
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def copystat(src, dst):
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"""Copy all stat info (mode bits, atime and mtime) from src to dst"""
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st = os.stat(src)
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mode = stat.S_IMODE(st[stat.ST_MODE])
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if hasattr(os, 'utime'):
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os.utime(dst, (st[stat.ST_ATIME], st[stat.ST_MTIME]))
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if hasattr(os, 'chmod'):
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os.chmod(dst, mode)
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def copy(src, dst):
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"""Copy data and mode bits ("cp src dst").
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The destination may be a directory.
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"""
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if os.path.isdir(dst):
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dst = os.path.join(dst, os.path.basename(src))
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copyfile(src, dst)
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copymode(src, dst)
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def copy2(src, dst):
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"""Copy data and all stat info ("cp -p src dst").
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The destination may be a directory.
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"""
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if os.path.isdir(dst):
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dst = os.path.join(dst, os.path.basename(src))
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copyfile(src, dst)
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copystat(src, dst)
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def copytree(src, dst, symlinks=0):
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"""Recursively copy a directory tree using copy2().
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The destination directory must not already exist.
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Error are reported to standard output.
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If the optional symlinks flag is true, symbolic links in the
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source tree result in symbolic links in the destination tree; if
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it is false, the contents of the files pointed to by symbolic
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links are copied.
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XXX Consider this example code rather than the ultimate tool.
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"""
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names = os.listdir(src)
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os.mkdir(dst)
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for name in names:
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srcname = os.path.join(src, name)
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dstname = os.path.join(dst, name)
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try:
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if symlinks and os.path.islink(srcname):
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linkto = os.readlink(srcname)
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os.symlink(linkto, dstname)
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elif os.path.isdir(srcname):
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copytree(srcname, dstname, symlinks)
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else:
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copy2(srcname, dstname)
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# XXX What about devices, sockets etc.?
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except (IOError, os.error), why:
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print "Can't copy %s to %s: %s" % (`srcname`, `dstname`, str(why))
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def rmtree(path, ignore_errors=0, onerror=None):
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"""Recursively delete a directory tree.
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If ignore_errors is set, errors are ignored; otherwise, if
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onerror is set, it is called to handle the error; otherwise, an
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exception is raised.
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"""
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cmdtuples = []
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_build_cmdtuple(path, 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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except:
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exc = sys.exc_info()
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if ignore_errors:
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pass
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elif onerror:
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onerror(cmd[0], cmd[1], exc)
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else:
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raise exc[0], (exc[1][0], exc[1][1] + ' removing '+cmd[1])
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# Helper for rmtree()
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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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