org.grails.plugins.databasemigration.command.DbmPreviousChangesetSqlCommand.groovy Maven / Gradle / Ivy

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/*
 * Copyright 2015 original authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.grails.plugins.databasemigration.command

import grails.dev.commands.ApplicationCommand
import groovy.transform.CompileStatic
import liquibase.Liquibase
import liquibase.database.Database
import org.grails.plugins.databasemigration.DatabaseMigrationException

@CompileStatic
class DbmPreviousChangesetSqlCommand implements ApplicationCommand, ApplicationContextDatabaseMigrationCommand {

    final String description = 'Generates the SQL to apply the previous  change sets'

    @Override
    void handle() {

        String count = args[0]
        if (!count) {
            throw new DatabaseMigrationException("The $name command requires a change set number argument")
        }
        if (!count.isNumber()) {
            throw new DatabaseMigrationException("The change set number argument '$count' isn't a number")
        }

        def filename = args[1]

        String skip = optionValue('skip') ?: '0'

        if (!skip.isNumber()) {
            throw new DatabaseMigrationException("The change set skip argument '$count' isn't a number")
        }

        configureLiquibase()

        withLiquibase { Liquibase liquibase ->
            withDatabase { Database database ->
                withFileOrSystemOutWriter(filename) { Writer output ->
                    doGeneratePreviousChangesetSql(output, database, liquibase, count, skip)
                }
            }
        }
    }
}