34 lines
983 B
Go
34 lines
983 B
Go
package discovery
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import "strings"
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// NormaliseImage strips the tag and digest from an image reference,
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// returning the bare repository name.
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//
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// Tricky case: "localhost:5000/foo:v1" — the first colon is a port,
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// not a tag. We disambiguate by splitting on "/" first and only
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// treating colons in the last segment as tag separators.
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func NormaliseImage(ref string) string {
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if at := strings.Index(ref, "@"); at >= 0 {
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ref = ref[:at]
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}
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slash := strings.LastIndex(ref, "/")
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if slash < 0 {
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if colon := strings.Index(ref, ":"); colon >= 0 {
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return ref[:colon]
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}
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return ref
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}
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prefix, last := ref[:slash], ref[slash+1:]
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if colon := strings.Index(last, ":"); colon >= 0 {
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last = last[:colon]
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}
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return prefix + "/" + last
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}
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// ImagesMatch reports whether two image references resolve to the same
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// repository, ignoring tag and digest. Case-sensitive per spec section 5.2.
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func ImagesMatch(a, b string) bool {
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return NormaliseImage(a) == NormaliseImage(b)
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}
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