Extract finds and returns all image names in a manifest.

NewReplacements takes in raw replacements and parses them to image names.

Pin iterates through manifests and replaces all image tags with resolved digests.

Replace takes a list of manifests and replaces the images specified in the replacement mapping.

Resolver takes a list of images and returns a mapping of the images to an image name with a digst.

Repleamcents contains a mapping of image names to alternative image names that should be used instead.