Add Liquibase "tag" property support

[junaid155]

Please add a new property with name tag in org.springframework.boot.autoconfigure.liquibase.LiquibaseProperties. Also update LiquibaseAutoConfiguration.java to set tag property in SpringLiquibase bean.

This property will help in generating roll back scripts for particular tags only when user has specified rollbackFile property.

[eddumelendez]

I can work on this issue :)

[mbhave]

Thanks @eddumelendez! I've assigned it to spring-contributor.

[junaid155]

@eddumelendez it will be better if we have separate tag property for generateRollbackFile and performUpdate method in SpringLiquibase.java.

[eddumelendez]

@junaid155 thanks, but SpringLiquibase only offers tag property for generateRollbackFile and performUpdate. The execution depends basically if property rollbackFile is set or not. So, I can not have separate properties for each one.

Now, that you said that I just want to make sure if what you are expecting is a sql file as an output which will be in this case. That means the rollback is not executed automatically. I found this thread #1826

I think we can set the use cases right here and evaluate them. Otherwise, some questions can raise for different flows. WDYT?

[junaid155]

@eddumelendez Thanks, My major concern is that i want to generate roll back scripts till particular tag only. just like liquibase command liquibase rollback=3.0.1