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Stage3 Image Library

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This represents the stage3 implementation for the image library.  At this point, we
are moving the image-centric functions to pkg/image including migration of args and
object-oriented references.  This is a not a one-for-one migration of funcs and some
funcs will need to continue to reside in runtime_img as they are overly specific to
libpod and probably not useful to others.

Signed-off-by: baude <bbaude@redhat.com>

Closes: #484
Approved by: baude
This commit is contained in:
baude
2018-03-08 15:45:52 -06:00
committed by Atomic Bot
parent bc358eb396
commit b85b217f55
18 changed files with 746 additions and 181 deletions
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52
libpod/image/utils.go
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@ -1,9 +1,16 @@
package image
import (
"io"
cp "github.com/containers/image/copy"
"github.com/containers/image/docker/reference"
"github.com/containers/storage"
"github.com/pkg/errors"
"github.com/containers/image/signature"
"github.com/containers/image/types"
"strings"
)
func getTags(nameInput string) (reference.NamedTagged, bool, error) {
@ -18,17 +25,17 @@ func getTags(nameInput string) (reference.NamedTagged, bool, error) {
// findImageInRepotags takes an imageParts struct and searches images' repotags for
// a match on name:tag
func findImageInRepotags(search imageParts, images []*storage.Image) (*storage.Image, error) {
func findImageInRepotags(search imageParts, images []*Image) (*storage.Image, error) {
var results []*storage.Image
for _, image := range images {
for _, name := range image.Names {
for _, name := range image.Names() {
d, err := decompose(name)
// if we get an error, ignore and keep going
if err != nil {
continue
}
if d.name == search.name && d.tag == search.tag {
results = append(results, image)
results = append(results, image.image)
break
}
}
@ -40,3 +47,42 @@ func findImageInRepotags(search imageParts, images []*storage.Image) (*storage.I
}
return results[0], nil
}
// getCopyOptions constructs a new containers/image/copy.Options{} struct from the given parameters
func getCopyOptions(reportWriter io.Writer, signaturePolicyPath string, srcDockerRegistry, destDockerRegistry *DockerRegistryOptions, signing SigningOptions, authFile, manifestType string, forceCompress bool) *cp.Options {
if srcDockerRegistry == nil {
srcDockerRegistry = &DockerRegistryOptions{}
}
if destDockerRegistry == nil {
destDockerRegistry = &DockerRegistryOptions{}
}
srcContext := srcDockerRegistry.GetSystemContext(signaturePolicyPath, authFile, forceCompress)
destContext := destDockerRegistry.GetSystemContext(signaturePolicyPath, authFile, forceCompress)
return &cp.Options{
RemoveSignatures: signing.RemoveSignatures,
SignBy: signing.SignBy,
ReportWriter: reportWriter,
SourceCtx: srcContext,
DestinationCtx: destContext,
ForceManifestMIMEType: manifestType,
}
}
// getPolicyContext sets up, intializes and returns a new context for the specified policy
func getPolicyContext(ctx *types.SystemContext) (*signature.PolicyContext, error) {
policy, err := signature.DefaultPolicy(ctx)
if err != nil {
return nil, err
}
policyContext, err := signature.NewPolicyContext(policy)
if err != nil {
return nil, err
}
return policyContext, nil
}
// hasTransport determines if the image string contains '://', returns bool
func hasTransport(image string) bool {
return strings.Contains(image, "://")
}