Using tar pipe for copying directory excluding files or directories.

A nice use case for tar pipe

Say we have a directory, with tons of subdirectories, each of which is a checked subversion project.

Dir structure looks like this.

RootDir / 

  /dir1/

    .svn

    dirs....

  /dir2/

    .svn

    dirs....

One wants to copy everything but .svn dirs.

Let's use tar pipe for that: 

tar --exclude \.svn -c RootDir | tar -C /path/to/destination/ -xv