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3065ea3d16
Add a "tag" command, for adding names to locally-stored images. Signed-off-by: Nalin Dahyabhai <nalin@redhat.com> Closes: #110 Approved by: rhatdan
73 lines
2.3 KiB
Go
73 lines
2.3 KiB
Go
package buildah
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import (
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"io"
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"github.com/Sirupsen/logrus"
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"github.com/containers/image/copy"
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"github.com/containers/image/signature"
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"github.com/containers/image/storage"
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"github.com/containers/image/types"
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"github.com/containers/storage/pkg/archive"
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"github.com/projectatomic/buildah/util"
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)
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// CommitOptions can be used to alter how an image is committed.
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type CommitOptions struct {
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// Compression specifies the type of compression which is applied to
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// layer blobs. The default is to not use compression, but
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// archive.Gzip is recommended.
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Compression archive.Compression
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// SignaturePolicyPath specifies an override location for the signature
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// policy which should be used for verifying the new image as it is
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// being written. Except in specific circumstances, no value should be
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// specified, indicating that the shared, system-wide default policy
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// should be used.
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SignaturePolicyPath string
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// AdditionalTags is a list of additional names to add to the image, if
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// the transport to which we're writing the image gives us a way to add
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// them.
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AdditionalTags []string
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// ReportWriter is an io.Writer which will be used to log the writing
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// of the new image.
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ReportWriter io.Writer
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}
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// Commit writes the contents of the container, along with its updated
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// configuration, to a new image in the specified location, and if we know how,
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// add any additional tags that were specified.
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func (b *Builder) Commit(dest types.ImageReference, options CommitOptions) error {
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policy, err := signature.DefaultPolicy(getSystemContext(options.SignaturePolicyPath))
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if err != nil {
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return err
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}
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policyContext, err := signature.NewPolicyContext(policy)
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if err != nil {
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return err
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}
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src, err := b.makeContainerImageRef(options.Compression)
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if err != nil {
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return err
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}
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err = copy.Image(policyContext, dest, src, getCopyOptions(options.ReportWriter))
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if err != nil {
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return err
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}
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if len(options.AdditionalTags) > 0 {
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switch dest.Transport().Name() {
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case storage.Transport.Name():
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img, err := storage.Transport.GetStoreImage(b.store, dest)
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if err != nil {
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return err
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}
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err = util.AddImageNames(b.store, img, options.AdditionalTags)
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if err != nil {
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return err
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}
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default:
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logrus.Warnf("don't know how to add tags to images stored in %q transport", dest.Transport().Name())
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}
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}
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return nil
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}
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