25 lines
525 B
Go
25 lines
525 B
Go
package tags
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import (
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"fmt"
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"regexp"
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)
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const DEFAULTTAG = "latest"
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var (
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//FIXME this regex also exists in registry/v2/regexp.go
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validTagName = regexp.MustCompile(`^[\w][\w.-]{0,127}$`)
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)
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// ValidateTagName validates the name of a tag
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func ValidateTagName(name string) error {
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if name == "" {
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return fmt.Errorf("tag name can't be empty")
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}
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if !validTagName.MatchString(name) {
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return fmt.Errorf("Illegal tag name (%s): only [A-Za-z0-9_.-] are allowed, minimum 1, maximum 128 in length", name)
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}
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return nil
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}
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