imagepattern

func IsImagePattern ¶

func IsImagePattern(image string) bool

func NewMatcher ¶

func NewMatcher(pattern string) (*regexp.Regexp, []namedMatchingGroup, error)

NewMatcher returns a Regexp that can be used to match an image or image tag against a pattern. The supplied pattern is NOT a regex. It is acorn's own custom syntax with the following characteristics: - Assumed to be valid docker tag characters: 0-9A-Za-z_.- - Outside of the special matching/sorting groups, a tag must match the pattern exactly - There are three special matching/sorting groups: #, *, and ** - ** indicates a portion of the tag doesn't need to match the pattern and won't be considered for sorting. It is the "wildcard" - * indicates a portion of the tag that will be matched and sorted alphabetically - # indicates a portion of the tag that will be matched and sorted numerically

Here are a few simple examples of patterns and what they would match: - "v#.#" - Matches: "v1.0", "v2.0" (return as latest). Doesn't match: "v1.alpha", "1.0", "v1.0.0" - "v1.0-*" - Matches: "v1.0-alpha", "v1.0-beta" (returned as latest). Doesn't match: "v1.0" - "v1.#-**" - Matches: "v1.0-cv23jkha", "v1.1-2020-01-01" (returned as latest).