TryReusingBlob now contains a new option `RequiredCompression` which
filters the blob by checking against a compression of the blob which is
considerd to be resued, in case `RequiredCompression` is set and `info`
of the blob being reused does not matches, no blob is returned.

Signed-off-by: Aditya R <arajan@redhat.com>

Fixes: containers#2023 (comment).

`assert.Equal` expects `assert.Equal(t, expected, actual)` instead of `assert.Equal(t, actual, expected)`.

Ref:https://pkg.go.dev/github.com/stretchr/testify/assert#Assertions.Equal

Signed-off-by: Aditya R <arajan@redhat.com>

Setting SystemContext.ArchitectureChoice to "" does not mean "match any/the first platform";
it's the default behavior of SystemContext, and it means "choose for the current runtime
architecture". (Originally discussed in
containers#1789 (comment) )

I.e. on amd64 these two test cases are redundant with the first two instances above,
and on other architectures (notably ARM) they cause failures.

So just drop them.

Signed-off-by: Miloslav Trmač <mitr@redhat.com>

…gorithmNames

There is a need to read annotations of a particular instance to get its
compression. Expose `Annotations` as a read-only field.

Needed By: containers#1987

Signed-off-by: Aditya R <arajan@redhat.com>

- Generally I discourage unsing named return values, it's easy
  to miss that it wasn't set
- I have no idea what the "in the middle of a multi-streamed copy"
  paragraph refers to.

Signed-off-by: Miloslav Trmač <mitr@redhat.com>

... so that we don't have to carry it around in extra
parameters. Migrating individual functions will follow.

Signed-off-by: Miloslav Trmač <mitr@redhat.com>

Signed-off-by: Miloslav Trmač <mitr@redhat.com>

Signed-off-by: Miloslav Trmač <mitr@redhat.com>

... so that we can eliminate three parameters.

Signed-off-by: Miloslav Trmač <mitr@redhat.com>

Signed-off-by: Miloslav Trmač <mitr@redhat.com>

Signed-off-by: Miloslav Trmač <mitr@redhat.com>

... so that the code looks the same here and in possible callees.

Signed-off-by: Miloslav Trmač <mitr@redhat.com>

Use options.Progress and ProgressInterval directly.

Signed-off-by: Miloslav Trmač <mitr@redhat.com>

Use c.options.OciDecryptConfig directly.

Signed-off-by: Miloslav Trmač <mitr@redhat.com>

Use c.options.OciEncryptConfig directly.

Signed-off-by: Miloslav Trmač <mitr@redhat.com>

Use c.options.DownloadForeignLayers directly.

Signed-off-by: Miloslav Trmač <mitr@redhat.com>

Use ic.c.options.OciEncryptLayers directly.

Signed-off-by: Miloslav Trmač <mitr@redhat.com>

So that we don't need to pass it around in a parameter.

Signed-off-by: Miloslav Trmač <mitr@redhat.com>

Signed-off-by: Miloslav Trmač <mitr@redhat.com>

Signed-off-by: Miloslav Trmač <mitr@redhat.com>

Use copier.unparsedToplevel now that it exists.

Signed-off-by: Miloslav Trmač <mitr@redhat.com>

... so that we don't need to carry it around in parameters.

Signed-off-by: Miloslav Trmač <mitr@redhat.com>

Signed-off-by: Miloslav Trmač <mitr@redhat.com>

It is no longer used.

Signed-off-by: Miloslav Trmač <mitr@redhat.com>

... so that we don't have so many unnamed return values, and
we can manage the return values as a batch.

Signed-off-by: Miloslav Trmač <mitr@redhat.com>

…sult on a match

... so that the caller doesn't have to assemble it. Using a pointer-or-nil eliminates
a separate boolean.

Signed-off-by: Miloslav Trmač <mitr@redhat.com>

... instead of three separate ones.

Signed-off-by: Miloslav Trmač <mitr@redhat.com>

If `UpdateCompressionAlgorithms` is set then `Annotations` map must be
initialized if its not set.

Signed-off-by: Aditya R <arajan@redhat.com>

Modifies `copy/single` to correctly use the feature from
containers#2023, that is if compression is
changed blob must be resued only if it matches required compression.

Signed-off-by: Aditya R <arajan@redhat.com>

After containers#2048 there is no room for copy/multiple to pass custom compressionFormat to copySingleImage
while processing each instance, following PR introduces that functionality again and wraps options
to simpler struct.

Signed-off-by: Aditya R <arajan@redhat.com>

If its a regular copy callers might not set `compressionFormat` and
`compressionLevel` in such case still honor compression which is set in
DestinationCtx from copier.

Signed-off-by: Aditya R <arajan@redhat.com>

* copy.Options now contains a new field `EnsureCompressionVariantExists
  map[string]int` which allows users to specify if they want to clone
images with specified `compression`.

Signed-off-by: Aditya R <arajan@redhat.com>

Signed-off-by: Aditya R <arajan@redhat.com>

Implement `instanceCopyClone` for multiple compression.

Signed-off-by: Aditya R <arajan@redhat.com>

While performing copy, set a custom compression passed generated from
prepareInstanceCopies.

Signed-off-by: Aditya R <arajan@redhat.com>

Following option does not provides a way to detect and exclude
compression if it already exists, this feature may be implemented in
future.

See: containers#1987 (comment)

Signed-off-by: Aditya R <arajan@redhat.com>

After implementing `instanceCopyClone` now instance to be copied can
exceed the original number of instances in the source, so amend report
message to make it more meaningful.

Signed-off-by: Aditya R <arajan@redhat.com>

Signed-off-by: Aditya R <arajan@redhat.com>

Signed-off-by: Aditya R <arajan@redhat.com>

* test multiple copy requests of same compression

Signed-off-by: Aditya R <arajan@redhat.com>

Signed-off-by: Aditya R <arajan@redhat.com>

EnsureCompressionVariantsExist is only valid when working with a
manifest list.

Signed-off-by: Aditya R <arajan@redhat.com>

When copying multiple images i.e `instanceCopyClone` and no image
exists in registry in such case if clones are prepared and
copied first then original copies will reuse blobs from the clone which
is unexpected since argument `requireCompressionFormatMatch` is by
default false for `instanceCopyCopy` case.

Problem described in following PR is easily reproduceable when working
with tools such as buildah, because without this PR buildah will push
`clones` first instead of originals and later on `originals` will reuse
blobs from `clones`.

Signed-off-by: Aditya R <arajan@redhat.com>