flyway Default placeholders in POM.XML - spring-boot

Question

Can I use a flyway "Default placeholder" in POM.XML ? for example ${flyway.url}, ${flyway.user} and ${flyway.password} ? Will Flyway replace these placeholders with the values defined in application.properties or application.yaml files at runtime before maven executes the pom ?
<build>
<plugins>
<plugin>
<groupId>org.flywaydb</groupId>
<artifactId>flyway-maven-plugin</artifactId>
<version>5.2.4</version>
<configuration>
<url>${flyway.url}</url>
<user>${flyway.user}</user>
<password>${flyway.password}</password>
</configuration>
<dependencies>
<dependency>
<groupId>com.oracle</groupId>
<artifactId>ojdbc6</artifactId>
<version>${oracle.version}</version>
</dependency>
</dependencies>
</plugin>
</plugins>
</build>

Answer 1

The easiest way to share the config between Maven and Spring would probably be the following:
src/main/resources/application.properties
spring.flyway.username=${flyway.username}
spring.flyway.password=${flyway.password}
...
flyway.username=user
flyway.password=SecretPa$$word
pom.xml
<properties>
<flyway.configFiles>${project.baseDir}/src/main/resources/application.properties</flyway.configFiles>
</properties>
Alternatively, you can use the Properties Maven Plugin:
<build>
<plugins>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>properties-maven-plugin</artifactId>
<version>1.0.0</version>
<executions>
<execution>
<phase>initialize</phase>
<goals>
<goal>read-project-properties</goal>
</goals>
<configuration>
<files>
<file>${project.baseDir}/src/main/resources/application.properties</file>
</files>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
If you want to have Flyway properties in a separate .properties file, you can also use Maven resource filtering on the application.properties/application.yaml files.