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Skarlso/docker_image.go

Last active July 17, 2020 19:34
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A convenient, succinct regex to verify validity of docker image tags without lookahead or lookbehind
Raw
docker_image.go
// Deals with the following formats:
// image/tag:v1.0.0
// 123.123.123.123:123/image/tag:v1.0.0
// your-domain.com/image/tag
// your-domain.com/image/tag:v1.1.1-patch1
// image/tag
// image
// image:v1.1.1-patch
// ubuntu@sha256:45b23dee08af5e43a7fea6c4cf9c25ccf269ee113168c19722f87876677c5cb2
// etc...
package main
const dockerImageVerify = "^(([a-z0-9]|[a-z0-9][a-z0-9\\-]*[a-z0-9])\\.)*([a-z0-9]|[a-z0-9][a-z0-9\\-]*[a-z0-9])(:[0-9]+\\/)?(?:[0-9a-z-]+[/@])(?:([0-9a-z-]+))[/@]?(?:([0-9a-z-]+))?(?::[a-z0-9\\.-]+)?$"
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