how to use docker image tag parsing regex in javascript?-CodePudding

I copied this regex for parsing docker image tag in Python.

^(?P<repository>[\w.\-_] ((?::\d |)(?=/[a-z0-9._-] /[a-z0-9._-] ))|)(?:/|)(?P<image>[a-z0-9.\-_] (?:/[a-z0-9.\-_] |))(:(?P<tag>[\w.\-_]{1,127})|)$

Can someone rewrite this regex in Javascript?

Test string:

alpine

alpine:latest

_/alpine

_/alpine:latest

alpine:3.7

docker.example.com/gmr/alpine:3.7

docker.example.com:5000/gmr/alpine:latest

pse/anabroker:latest

The Javascript version here has a pattern error without any matches.

CodePudding user response：

Your named groups have a different syntax in JS and the / needs escaping

https://regex101.com/r/EpwtjK/1

^(?<repository>[\w.\-_] ((?::\d |)(?=\/[a-z0-9._-] \/[a-z0-9._-] ))|)(?:\/|)(?<image>[a-z0-9.\-_] (?:\/[a-z0-9.\-_] |))(:(?<tag>[\w.\-_]{1,127})|)$