renovate.json5

{
    "$schema": "https://docs.renovatebot.com/renovate-schema.json",
    // We don't use this for now, as we want to avoid the noise - we'll only selectively activate updates
    // "extends": [
    //    "config:recommended",
    // ]

    // We want a nice overview of dependencies under renovate's supervision
    dependencyDashboard: true,
    // See .github/CODEOWNERS
    assigneesFromCodeOwners: true,
    // Do not separate patch and minor upgrades into separate PRs for the same dependency
    separateMinorPatch: false,
    // Use nicer semantic commits style for messages
    semanticCommits: "enabled",

    // Don't jump the gun in case something goes awry in upstream releases
    minimumReleaseAge: "3 days",
    // Only have this number of PRs open at any time. We will further limit this by using grouping for packages
    prConcurrentLimit: 5,
    // By default, create PRs only on Sundays to avoid noise during the week (sufficient for scheduled maintenance)
    schedule: ["* * * * 0"],

    // Only include certain paths we actually want Renovate to take care of.
    includePaths: [
        "modules/container-*/**",
    ],

    packageRules: [
        {
            description: "Disable Maven Manager",
            matchManagers: "maven",
            enabled: false
        },
        {
            description: "Disable Dockerfile Manager",
            matchManagers: "dockerfile",
            enabled: false
        },
        {
            description: "Group package updates for the Config Baker Container Image",
            matchFileNames: ["modules/container-configbaker/**/*[dD]ockerfile"],
            groupName: "Config Baker Container Packages"
        },
    ],

    customManagers: [
        {
            customType: "regex",
            description: "Update _VERSION variables in Dockerfiles",
            managerFilePatterns: [
                "/(^|/|\\.)Dockerfile$/",
                "/(^|/)Dockerfile\\.[^/]*$/"
            ],
            matchStrings: [
                "# renovate: datasource=(?<datasource>[a-zA-Z0-9-._]+?) depName=(?<depName>[^\\s]+?)(?: (lookupName|packageName)=(?<packageName>[^\\s]+?))?(?: versioning=(?<versioning>[^\\s]+?))?(?: extractVersion=(?<extractVersion>[^\\s]+?))?(?: registryUrl=(?<registryUrl>[^\\s]+?))?\\s(?:ENV|ARG)\\s+[A-Za-z0-9_]+?_VERSION[ =][\"']?(?<currentValue>.+?)[\"']?\\s"
            ],
            versioningTemplate: '{{#if versioning}}{{{versioning}}}{{else}}semver{{/if}}'
        }
    ]
}