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>
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>
Touching the file before hardlinking was covering up a bug in
how hard links are handled in tar. Without the touch the hardlink
should still be included and both files should hardlink after
the tar is applied.
Signed-off-by: Derek McGowan <derek@mcgstyle.net>
Test deleting multiple files, directories, and creating
the equivalent of an opaque directory.
Signed-off-by: Derek McGowan <derek@mcgstyle.net> (github: dmcgowan)
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)
