This is a gnarly patchset that has been mashed together.
It uncovered that some aspects of Check were never really working
correctly for `xattr` keywords, but also the `Update()` had been left
undone for a while.
This includes some API changes around the `Keyword` and `KeyVal` types.
Also I would like to update the signature for the `UpdateKeywordFunc` to
just accept a `KeyVal` as an argugment, rather than a keyword AND the
value. with this context there would be no need to guess on the value of
what's passed to the xattr update function of whether it needs or
already is base64 encoded.
Signed-off-by: Vincent Batts <vbatts@hashbangbash.com>
Now that we have govis, move everything to using govis.{Vis,Unvis} and
then remove the cvis build tags (because that code no longer exists).
Signed-off-by: Aleksa Sarai <asarai@suse.de>
The current Vis() and Unvis() are using the C implementation from
MTREE(8).
But that means that cgo is used, which is not always desired.
Signed-off-by: Vincent Batts <vbatts@hashbangbash.com>
Since not every keyword applies to every type entry, include a comment
with the keywords the manifest was generated with.
Signed-off-by: Aleksa Sarai <asarai@suse.de>
Signed-off-by: Vincent Batts <vbatts@hashbangbash.com>
symlink(2) is a very dumb syscall, and allows you to put any damn value
you please inside a symlink. In addition, spaces are valid path
characters which causes issues with keyword parsing. So use Vis() and
Unvis() to safely store an encoded version of the path.
This also adds a cli test for this behaviour.
Signed-off-by: Aleksa Sarai <asarai@suse.de>
Instead of checking each time during keyword evaluation if
the keyword is "time", just remove it from the start and
replace it with "tar_time" (if necessary).
Signed-off-by: Stephen Chung <schung@redhat.com>
Resolves#56. Now, the Entry tree will be populated
under a common root (if necessary), so that a manifest can
be accurately generate from a tar file that has been
created using multiple directories.
Signed-off-by: Stephen Chung <schung@redhat.com>
Flattening within the readHeaders() function call was problematic
because readHeaders() is called as a goroutine; thus, as the
main program was calling `tdh.writeTo(os.Stdout)`, readHeaders() was
still in the process of flattening the tree structure. To get around this,
we now call flatten in ts.Hierarchy(), such that only when the main program
is ready to retrieve a "valid" DirectoryHierarchy from the archive, should
we flatten the tree.
Signed-off-by: Stephen Chung <schung@redhat.com>
Cleaned up some dead code, and made populateTree not
take in a *tar.Streamer argument, as the ts argument was
only used to set an error. The function now returns
an error (if any). Also made flatten not have to take in
a *tar.Streamer argument as well.
Signed-off-by: Stephen Chung <schung@redhat.com>
Files don't close properly when `defer`ing inside
a for loop, since the surrounding function is still
iterating in a for loop. To fix this, just close the files
explicitly after `populateTree()` in `readHeaders()`
Signed-off-by: Stephen Chung <schung@redhat.com>
Added some more test cases for `vis`ing and `unvis`ing
strings, and a test case that walks/checks a directory with
filenames that require encoding. Had to change Path() to account
for possible errors Unvis() could return. Refactored Vis()/Unvis() into
go-mtree tar functionality as well.
Signed-off-by: Stephen Chung <schung@redhat.com>
if the keyword "tar_time" is present when evaluating
an Entry, gomtree should use the tar_time when evaluating
the "time" keyword as well. This commit also adds a test that
makes sure "tar_time" wins against "time" if both are present.
Some minor clean-ups as well, such as checking if KeywordFunc[keyword]
actually retrieves a function.
Signed-off-by: Stephen Chung <schung@redhat.com>
Since the field in a tar header for each file only preserves seconds
precision, not nanosecond precision, let's handle it special. This will
allow for more custom case handling in Check()
Signed-off-by: Vincent Batts <vbatts@hashbangbash.com>
This commit contains added features to go-mtree that allows
user to create an mtree spec with '-T' option when specifying
a tar archive. Users can also validate an mtree spec against
a tar archive with an mtree spec. Also for the test archive,
there is a mixture of files, and folders (empty & non-empty),
and symlinks (broken & unbroken).
Signed-off-by: Stephen Chung <schung@redhat.com>
when creating a manifest from, or validating, a stream like a tar
archive, it requires thinking about some of the functions differently
than walking a directory tree.
This is the beginning of allowing for such features.
Signed-off-by: Vincent Batts <vbatts@hashbangbash.com>
