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Issue #6856: Add a filter keyword argument to TarFile.add().

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The filter argument must be a function that takes a TarInfo
object argument, changes it and returns it again. If the
function returns None the TarInfo object will be excluded
from the archive.
The exclude argument is deprecated from now on, because it
does something similar but is not as flexible.
This commit is contained in:
Lars Gustäbel 2009-09-12 10:28:15 +00:00
parent d4c7eb1647
commit 21121e64b4
4 changed files with 76 additions and 8 deletions
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27
Lib/tarfile.py
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@ -1918,13 +1918,16 @@ def list(self, verbose=True):
print "link to", tarinfo.linkname,
print
def add(self, name, arcname=None, recursive=True, exclude=None):
def add(self, name, arcname=None, recursive=True, exclude=None, filter=None):
"""Add the file `name' to the archive. `name' may be any type of file
(directory, fifo, symbolic link, etc.). If given, `arcname'
specifies an alternative name for the file in the archive.
Directories are added recursively by default. This can be avoided by
setting `recursive' to False. `exclude' is a function that should
return True for each filename to be excluded.
return True for each filename to be excluded. `filter' is a function
that expects a TarInfo object argument and returns the changed
TarInfo object, if it returns None the TarInfo object will be
excluded from the archive.
"""
self._check("aw")
@ -1932,9 +1935,13 @@ def add(self, name, arcname=None, recursive=True, exclude=None):
arcname = name
# Exclude pathnames.
if exclude is not None and exclude(name):
self._dbg(2, "tarfile: Excluded %r" % name)
return
if exclude is not None:
import warnings
warnings.warn("use the filter argument instead",
DeprecationWarning, 2)
if exclude(name):
self._dbg(2, "tarfile: Excluded %r" % name)
return
# Skip if somebody tries to archive the archive...
if self.name is not None and os.path.abspath(name) == self.name:
@ -1950,6 +1957,13 @@ def add(self, name, arcname=None, recursive=True, exclude=None):
self._dbg(1, "tarfile: Unsupported type %r" % name)
return
# Change or exclude the TarInfo object.
if filter is not None:
tarinfo = filter(tarinfo)
if tarinfo is None:
self._dbg(2, "tarfile: Excluded %r" % name)
return
# Append the tar header and data to the archive.
if tarinfo.isreg():
f = bltn_open(name, "rb")
@ -1960,7 +1974,8 @@ def add(self, name, arcname=None, recursive=True, exclude=None):
self.addfile(tarinfo)
if recursive:
for f in os.listdir(name):
self.add(os.path.join(name, f), os.path.join(arcname, f), recursive, exclude)
self.add(os.path.join(name, f), os.path.join(arcname, f),
recursive, exclude, filter)
else:
self.addfile(tarinfo)