renovate.json5

{
  $schema: 'https://docs.renovatebot.com/renovate-schema.json',
  extends: [
    'config:best-practices',
    ':semanticCommitTypeAll(fix)',
    'github>secustor/backstage-renovate-config',
  ],

  // add a Renovate label for renovate-changesets workflow
  addLabels: ['renovate'],
  // ignore author of changesets
  gitIgnoredAuthors: ['renovate@poxhofer.at'],

  packageRules: [
    {
      // general configs for all plugins
      matchFileNames: ['plugins/**'],
      // only update if the new version falls outside the range.
      // Normally we would use update-lockfile, tough we use lockfile maintenance to save CI minutes
      rangeStrategy: 'replace',
    },

    // activate unpublish safeguard for npm packages except Renovate, so that docker and npm references are in sync
    {
      matchDatasources: ['npm'],
      matchDepNames: ['!renovate', '!@backstage/*'],
      minimumReleaseAge: '3 days',
    },

    // auto merges
    {
      // auto merge devDependencies in package.json files, as we expect unit tests to fail for them if they break
      matchDepTypes: ['devDependencies'],
      matchManagers: ['npm'],
      automerge: true,
    },
    {
      // do not auto merge major updates
      matchUpdateTypes: 'major',
      automerge: false,
    },

    {
      // do not try to pin Docker and regex references as they are not published or tested
      matchManagers: ['regex', 'docker-compose', 'dockerfile'],
      pinDigests: false,
    },
  ],

  customManagers: [
    {
      // updating renovate defaults
      customType: 'regex',
      fileMatch: '^plugins/renovate-backend-module-runtime-docker/.*',
      matchStrings: [
        // README defaults
        'tag:\\s+latest\\s+#\\s*default:\\s*(?<currentValue>\\S+)',
        // runtime.ts
        "imageTag\\s*=\\s*'(?<currentValue>\\S*?)'",
        // config.d.ts
        "Default:\\s*'(?<currentValue>[\\.\\d]*?)'",
      ],
      depNameTemplate: 'renovate',
      packageNameTemplate: 'ghcr.io/renovatebot/renovate',
      datasourceTemplate: 'docker',
    },
  ],
}