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Split copy/copy.go into three files #1878

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merged 6 commits into from
Mar 9, 2023
Merged

Split copy/copy.go into three files #1878

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44768ed
Move copyOneImage, imageCopier, and exclusive callees, to copy/single.go
mtrmac Mar 9, 2023
a0ccf79
Reorder copy/single.go a bit
mtrmac Mar 9, 2023
1bc63e7
Move copyMultipleImages to copy/multiple.go
mtrmac Mar 9, 2023
433b4a2
Reorder copy/copy.go a bit
mtrmac Mar 9, 2023
9fcad50
Move compression-specific variables to copy/compression.go
mtrmac Mar 9, 2023
1ae83b2
Rename copyOneImage to copySingleImage
mtrmac Mar 9, 2023
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19 changes: 19 additions & 0 deletions copy/compression.go
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Original file line number Diff line number Diff line change
Expand Up @@ -6,13 +6,32 @@ import (
"io"

internalblobinfocache "github.com/containers/image/v5/internal/blobinfocache"
"github.com/containers/image/v5/manifest"
"github.com/containers/image/v5/pkg/compression"
compressiontypes "github.com/containers/image/v5/pkg/compression/types"
"github.com/containers/image/v5/types"
imgspecv1 "github.com/opencontainers/image-spec/specs-go/v1"
"github.com/sirupsen/logrus"
"golang.org/x/exp/maps"
)

var (
// defaultCompressionFormat is used if the destination transport requests
// compression, and the user does not explicitly instruct us to use an algorithm.
defaultCompressionFormat = &compression.Gzip

// compressionBufferSize is the buffer size used to compress a blob
compressionBufferSize = 1048576

// expectedCompressionFormats is used to check if a blob with a specified media type is compressed
// using the algorithm that the media type says it should be compressed with
expectedCompressionFormats = map[string]*compressiontypes.Algorithm{
imgspecv1.MediaTypeImageLayerGzip: &compression.Gzip,
imgspecv1.MediaTypeImageLayerZstd: &compression.Zstd,
manifest.DockerV2Schema2LayerMediaType: &compression.Gzip,
}
)

// bpDetectCompressionStepData contains data that the copy pipeline needs about the “detect compression” step.
type bpDetectCompressionStepData struct {
isCompressed bool
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