# If $1=configure and $2 is set, this is an upgrade
        if [ -n $2 ]; then
            IS_UPGRADE=true
        fi
    ;;
    abort-upgrade|abort-remove|abort-deconfigure)
    ;;

    # RedHat ####################################################
    1)
        # If $1=1 this is an install
        IS_UPGRADE=false
    ;;
    2)
        # If $1=1 this is an upgrade
        IS_UPGRADE=true
    ;;

    *)

        SOURCE_ENV_FILE=false
    ;;
    failed-upgrade|abort-install|abort-upgrade|disappear|upgrade|disappear)
    ;;

    # RedHat ####################################################
    0)
        REMOVE_DIRS=true
        REMOVE_SERVICE=true
        REMOVE_USER_AND_GROUP=true
    ;;
    1)
        # If $1=1 this is an upgrade
        IS_UPGRADE=true
    ;;

    *)

    }

    /**
     * Creates upgrade options with only the --all flag set.
     *
     * @param all the --all option value
     * @return configured upgrade options
     */
    public static UpgradeOptions createOptionsWithAll(boolean all) {
        return createOptions(all, null, null, null, null);
    }

    /**
     * Creates upgrade options with only the --model-version option set.
     *

    }

    /**
     * Subclasses implement the actual upgrade logic here.
     *
     * @param context the upgrade context
     * @param pomMap map of all POM files in the project
     * @return the result of the upgrade operation
     */
    protected abstract UpgradeResult doApply(UpgradeContext context, Map<Path, Document> pomMap);

    /**
     * Gets the upgrade options from the context.
     *

 * </pre>
 */
public interface UpgradeStrategy {

    /**
     * Applies the upgrade strategy to all eligible POMs.
     *
     * @param context the upgrade context
     * @param pomMap map of all POM files in the project (domtrip Documents)
     * @return the result of the upgrade operation
     */
    UpgradeResult apply(UpgradeContext context, Map<Path, Document> pomMap);

    /**

${packaging.scripts.header}

#
# This script is executed in the pre-installation phase
#
#   On Debian,
#       $1=install : indicates an new install
#       $1=upgrade : indicates an upgrade
#
#   On RedHat,
#       $1=1       : indicates an new install
#       $1=2       : indicates an upgrade



# Sets the default values for fess variables used in this script
FESS_USER="${packaging.fess.user}"
FESS_GROUP="${packaging.fess.group}"

#       $1=remove    : indicates a removal
#       $1=upgrade   : indicates an upgrade
#
#   On RedHat,
#       $1=0         : indicates a removal
#       $1=1         : indicates an upgrade



STOP_REQUIRED=false

case "$1" in

    # Debian ####################################################
    remove)
        STOP_REQUIRED=true
    ;;
    upgrade)
        if [ "$RESTART_ON_UPGRADE" = "true" ]; then

 * under the License.
 */

/**
 * Provides the API for the Maven Upgrade tool ({@code mvnup}).
 *
 * <p>This package contains interfaces and classes for the Maven upgrade tool,
 * which provides functionality for upgrading Maven projects and dependencies.</p>
 *
 * <p>Key features include:</p>
 * <ul>
 *   <li>Project upgrade capabilities</li>
 *   <li>Dependency version management</li>

```

If you need to upgrade all of the packages in requirements lock file, just pass
the `--upgrade` parameter:

```
bazel run //ci/official/requirements_updater:requirements.update --repo_env=HERMETIC_PYTHON_VERSION=3.12 -- --upgrade
```

For the full set of supported parameters please check

https://www.elastic.co/guide/en/elasticsearch/reference/current/install-elasticsearch.html[Elasticsearch installation
documentation].

[[upgrade]]
== Upgrade

To upgrade from an earlier version of Elasticsearch, see the
https://www.elastic.co/guide/en/elasticsearch/reference/current/setup-upgrade.html[Elasticsearch upgrade
documentation].

[[build-source]]
== Build from source

Elasticsearch uses https://gradle.org[Gradle] for its build system.