This moves the RootPath function out of the archive package and into the
fs package for external use.
Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
Fixes bug for resolving symlinks which allowed fully resolving
an existing symlink to a path, causing some symlinks to get
overridden as symlinks to self.
Updates logic to split name into parent path, resolve the parent
path, then safely join back with the base name.
Uses the split code to ensure parent directories are created in
all cases.
Replaces `rootJoin` with filepath.Join to the root, which already
correctly cleans relative symlinks to the root.
Signed-off-by: Derek McGowan <derek@mcgstyle.net>
Replace cases where a tar specified name is joined to a directory
with root path to bound name to path.
Signed-off-by: Derek McGowan <derek@mcgstyle.net>
Ensure symlinks cannot be used to breakout of unpack directory.
Evaluate absolute symlinks as scoped to unpack directory.
Allow symlinks which point outside the root to be created.
Scope all resolution of symlinks to the unpack directory.
Signed-off-by: Derek McGowan <derek@mcgstyle.net>
Previously hardlinking to an unmodified file or linking to a file
which was touched by not detected as modified caused a new file
to be created on unpack. This new file and the original source file
were not linked since no link record was created in the tar. This
change addresses this by adding links for all hardlinks to a file
when it is detected as changed. These links will be written after
the source file is written and may occur out of order in regard to
file name.
Signed-off-by: Derek McGowan <derek@mcgstyle.net>
Removed unused requires root test function and updated
tar requires function to use lookup method.
Signed-off-by: Derek McGowan <derek@mcgstyle.net> (github: dmcgowan)
Archive package handles generating and applying diff tar streams
based on the OCI diff tar specification.
Signed-off-by: Derek McGowan <derek@mcgstyle.net> (github: dmcgowan)
