renovate.json5

{
  $schema: 'https://docs.renovatebot.com/renovate-schema.json',
  extends: [
    'config:base',
  ],
  packageRules: [
    {
      matchUpdateTypes: [
        'minor',
        'patch',
        'pin',
        'digest'
      ],
      automerge: true,
    },
  ],
  platformAutomerge: true,
  ignorePresets: [
    // Ensure we get the latest version and are not pinned to old versions.
    'workarounds:javaLTSVersions',
  ],
  customManagers: [
    // Update .java-version file with the latest JDK version.
    {
      customType: 'regex',
      fileMatch: [
        '\\.java-version$',
      ],
      matchStrings: [
        '(?<currentValue>.*)\\n',
      ],
      datasourceTemplate: 'java-version',
      depNameTemplate: 'java',
      // Only write the major version.
      extractVersionTemplate: '^(?<version>\\d+)',
    },
  ],
}