50 lines
2.1 KiB
Python
50 lines
2.1 KiB
Python
import re
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RE_IMAGE = re.compile("^((?:(?:[a-zA-Z0-9]|[a-zA-Z0-9][a-zA-Z0-9-]*[a-zA-Z0-9])"
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"(?:(?:\\.(?:[a-zA-Z0-9]|[a-zA-Z0-9][a-zA-Z0-9-]*[a-zA-Z0-9]))+)?"
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"(?::[0-9]+)?/)?[a-z0-9]+(?:(?:(?:[._]|__|[-]*)[a-z0-9]+)+)?"
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"(?:(?:/[a-z0-9]+(?:(?:(?:[._]|__|[-]*)[a-z0-9]+)+)?)+)?)"
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"(?::([\\w][\\w.-]{0,127}))?(?:@([A-Za-z][A-Za-z0-9]*"
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"(?:[-_+.][A-Za-z][A-Za-z0-9]*)*[:][[:xdigit:]]{32,}))?$")
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def parse_image(foo):
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m = RE_IMAGE.match(foo)
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if not m:
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raise ValueError("%s does not match Docker image regex" % repr(foo))
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image, tag, digest = m.groups()
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try:
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org, image = image.rsplit("/", 1)
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except ValueError:
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org = "library"
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if org == "docker.io":
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org = "library"
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try:
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registry, org = org.rsplit("/", 1)
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except ValueError:
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registry = "docker.io"
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if "/" in registry:
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raise ValueError("Won't allow caching Docker registry in image name")
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return registry, org, image, tag, digest
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def mutate_image(foo, hostname, cached_registries):
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registry, org, image, tag, digest = parse_image(foo)
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j = "%s/%s/%s" % (registry, org, image)
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if tag:
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j = "%s:%s" % (j, tag)
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if digest:
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# TODO: Test this
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j = "%s@%s" % (j, digest)
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if registry in cached_registries:
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j = "%s/%s" % (hostname, j)
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return j
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assert mutate_image("mongo:latest", "harbor.k-space.ee", ("docker.io")) == "harbor.k-space.ee/docker.io/library/mongo:latest"
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assert mutate_image("mongo", "harbor.k-space.ee", ("docker.io")) == "harbor.k-space.ee/docker.io/library/mongo"
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assert mutate_image("library/mongo", "harbor.k-space.ee", ("docker.io")) == "harbor.k-space.ee/docker.io/library/mongo"
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assert mutate_image("docker.io/library/mongo", "harbor.k-space.ee", ("docker.io")) == "harbor.k-space.ee/docker.io/library/mongo"
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assert mutate_image("docker.io/calico/typha:v3.24.5", "harbor.k-space.ee", ("docker.io")) == "harbor.k-space.ee/docker.io/calico/typha:v3.24.5"
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assert mutate_image("docker.io/mongo:6.0.3", "harbor.k-space.ee", ("docker.io")) == "harbor.k-space.ee/docker.io/library/mongo:6.0.3"
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