Issues #22468, #21996, #22208: Clarify gettarinfo() and TarInfo usage
* Make it more obvious gettarinfo() is based on stat(), and that non-ordinary
files may need special care
* Filename taken from fileobj.name; suggest dummy arcname as a workaround
* Indicate TarInfo may be used directly, not just via gettarinfo()
diff --git a/Lib/tarfile.py b/Lib/tarfile.py
index 66e5393..be68800 100644
--- a/Lib/tarfile.py
+++ b/Lib/tarfile.py
@@ -1844,11 +1844,12 @@
return [tarinfo.name for tarinfo in self.getmembers()]
def gettarinfo(self, name=None, arcname=None, fileobj=None):
- """Create a TarInfo object for either the file `name' or the file
- object `fileobj' (using os.fstat on its file descriptor). You can
- modify some of the TarInfo's attributes before you add it using
- addfile(). If given, `arcname' specifies an alternative name for the
- file in the archive.
+ """Create a TarInfo object from the result of os.stat or equivalent
+ on an existing file. The file is either named by `name', or
+ specified as a file object `fileobj' with a file descriptor. If
+ given, `arcname' specifies an alternative name for the file in the
+ archive, otherwise, the name is taken from the 'name' attribute of
+ 'fileobj', or the 'name' argument.
"""
self._check("aw")
@@ -1869,7 +1870,7 @@
# Now, fill the TarInfo object with
# information specific for the file.
tarinfo = self.tarinfo()
- tarinfo.tarfile = self
+ tarinfo.tarfile = self # Not needed
# Use os.stat or os.lstat, depending on platform
# and if symlinks shall be resolved.
@@ -2034,7 +2035,7 @@
def addfile(self, tarinfo, fileobj=None):
"""Add the TarInfo object `tarinfo' to the archive. If `fileobj' is
given, tarinfo.size bytes are read from it and added to the archive.
- You can create TarInfo objects using gettarinfo().
+ You can create TarInfo objects directly, or by using gettarinfo().
On Windows platforms, `fileobj' should always be opened with mode
'rb' to avoid irritation about the file size.
"""