Using regexManager with Dockerfile and image version ARG

[mcritchlow]

Which Renovate are you using?

WhiteSource Renovate App

Which platform are you using?

GitLab.com

Have you checked the logs? Don't forget to include them if relevant

Example log snippet of a Dockerfile that would ideally have been updated:

{
        "deps": [
          {
            "depType": "final",
            "updates": [],
            "depIndex": 0,
            "datasource": "docker",
            "skipReason": "contains-variable",
            "replaceString": "ruby:$RUBY_VERSION-alpine",
            "autoReplaceStringTemplate": "{{depName}}{{#if newValue}}:{{newValue}}{{/if}}{{#if newDigest}}@{{newDigest}}{{/if}}"
          }
        ],
        "manager": "dockerfile",
        "packageFile": "shoreline/discovery/Dockerfile"
      },

What would you like to do?

Hello, in this gitlab repository we have several Dockerfile's for different products (it's a monorepo).

The ruby-based Dockerfile's take the form:

ARG RUBY_VERSION=2.6.6
FROM ruby:$RUBY_VERSION-alpine as shoreline
..
..

I'm trying to use the new regexManager option to teach Renovate to update the RUBY_VERSION argument. The configuration I'm attempting to use is:

{
  "extends": [
    "config:base",
    ":preserveSemverRanges"
  ],
  "gitlabci": {
    "fileMatch": ["^ci/.*\\.ya?ml$"]
  },
  "bundler": { "enabled": true },
  "labels": [ "dependencies" ],
  "regexManagers": [
    {
      "fileMatch": ["^Dockerfile$"],
      "matchStrings": ["ARG RUBY_VERSION=(?<currentValue>.*?)\n" ],
      "depNameTemplate": "ruby",
      "datasourceTemplate": "docker"
    }
  ]
}

While it's not ideal that the -alpine suffix isn't matched by the currentValue, I was hoping this wouldn't be a problem since the ruby container image always keeps the Alpine versions in sync.

That said, what I'm getting are logs as shown above.

I realize I could probably put the entire image reference in the ARG, like: ruby:2.6.6-alpine and change the FROM line to: FROM $RUBY_VERSION as shoreline, but we never change either the base image (ruby) or the OS-variant alpine.

I'm curious if there's a way to achieve what I'm after using regexManager. Thanks in advance for any guidance!

[viceice]

You can use a more generic regexManager, like we do ourself.

Dockerfile

# renovate: datasource=docker depName=ruby versioning=ruby
ARG RUBY_VERSION=2.6.6
FROM ruby:$RUBY_VERSION-alpine as shoreline

config

"regexManagers": [
    {
      "fileMatch": ["(^|/|\\.)Dockerfile$", "(^|/)Dockerfile\\.[^/]*$"],
      "matchStrings": [
        "# renovate: datasource=(?<datasource>[a-z-]+?) depName=(?<depName>.+?)(?: versioning=(?<versioning>[a-z-]+?))?\\s(?:ENV|ARG) .+?_VERSION=(?<currentValue>.+?)\\s"
      ],
      "versioningTemplate": "{{#if versioning}}{{versioning}}{{else}}semver{{/if}}"
    },
  ]

[mcritchlow]

@viceice - Thank you, I'll give that a try!

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed soon if no further activity occurs.

[mcritchlow]

The proposed config will work for us, thanks again for the suggestion!