EDIT

<?xml version="1.0" encoding="UTF-8"?>

<project default="build">

    <property file="build.properties" /> 

    <target name="install_databases">

        <foreach param="filename" absparam="absfilename" target="create_database">

            <fileset dir="${gzdir}">

                <include name="*.sql.gz"/>

            </fileset>

        </foreach>

    </target>

    <target name="create_database" >

<!-- unzip gz file -->     

        <php expression="substr('${filename}',0,strlen('${filename}')-3)" returnProperty="sqlfilename"/>

        <exec dir="${gzdir}"

            command="gzip -dc ${filename} > ${sqlfilename}" checkreturn="true">

        </exec>

<!-- construct database name (dbname) from file name -->  

        <php expression="substr('${filename}',0,strpos('${filename}','_') )" returnProperty="dbtype"/>

        <if>

        <equals arg1="${dbtype}" arg2="${db_drupal}" />

        <then>

            <php expression="substr('${filename}',strlen('${file_prefix_drupal}'),strpos('${filename}','_20')-strlen('${file_prefix_drupal}') )" returnProperty="dbname"/>

            <php expression="'${db_prefix_drupal}' . '${dbname}'" returnProperty="dbname"/>

        </then>

        </if>

        <if>

        <equals arg1="${dbtype}" arg2="${db_cdm}" />

        <then>

            <php expression="substr('${filename}',strlen('${file_prefix_cdm}'),strpos('${filename}','_20')-strlen('${file_prefix_cdm}') )" returnProperty="dbname"/>

            <php expression="'${db_prefix_cdm}' . '${dbname}'" returnProperty="dbname"/>

        </then>

        </if>

<!-- create database from sql file, drop existing database -->

        <exec command="mysql -u${db.username} -p${db.password} -e &quot;drop database if exists ${dbname};&quot;" />

        <exec command="mysql -u${db.username} -p${db.password} -e &quot;create database ${dbname};&quot;" />

        <exec command="mysql -u${db.username} -p${db.password} ${dbname} &lt; ${gzdir}/${sqlfilename}" />

        <echo>${dbname} created</echo>

<!-- delete unzipped file -->        

        <delete file="${gzdir}/${sqlfilename}" />

    </target>    

<!-- alter admin users to a user/password that is easy to remember, to use in development -->

    <target name="alter_database_users">

        <foreach list="${db_array}" param="db_params" target="change_admin_user" />

    </target>

    <target name="change_admin_user">

        <php expression="substr('${db_params}',0, strpos('${db_params}','|'))" returnProperty="dbname"/>

        <php expression="substr('${db_params}', 1+ strpos('${db_params}','|'))" returnProperty="tableprefix"/>

        <exec command="mysql -u${db.username} -p${db.password} -e &quot; UPDATE `${db_prefix_drupal}${dbname}`.`${tableprefix}users` SET `name` = '${admin.name}',`pass` = MD5( '${admin.password}' ) ,`mail` = '${admin.email}',`init` = '${admin.email}' WHERE `${tableprefix}users`.`uid` =1; &quot;" />

    </target>

    <target name="build" depends="install_databases,alter_database_users" />

</project>