[FLINK-6056] [build]apache-rat exclude flink directory in tools

[shijinkui]

The flink* directory in the tools is temporary cloned when build distribution.
So when build the Flink project, we should exclude the flink* directory.

• General

  • The pull request references the related JIRA issue ("[FLINK-6056] apache-rat exclude flink directory in tools")
  • The pull request addresses only one issue
  • Each commit in the PR has a meaningful commit message (including the JIRA id)

• Documentation

  • Documentation has been added for new functionality
  • Old documentation affected by the pull request has been updated
  • JavaDoc for public methods has been added

• Tests & Build

  • Functionality added by the pull request is covered by tests
  • mvn clean verify has been executed successfully locally or a Travis build has passed

[zentol]

Why exactly is it a problem if the rat-plugin checks the tools directory?

[shijinkui]

Why exactly is it a problem if the rat-plugin checks the tools directory?
There no necessary to check the tmp flink project in the tools, because it will extra cost some time when build the main project.

[StephanEwen]

I am a bit confused... I think there is no tools/flink* directory that would need an exclusion...

[shijinkui]

I am a bit confused... I think there is no tools/flink* directory that would need an exclusion...

When execute tools/create_release_files.sh, it will clone flink project from apache. Also we had add tools/flink* in the .gitignore

[StephanEwen]

@shijinkui Got it, thanks.

+1 to merge this

[StephanEwen]

Merging this...