How to get the path to the processed file?

Question

gulp.js

Greetings!
There are directories nested within each other, in each node of which files are located.
How to get the path for each file in gallp?
Here is a simple design. How can I get thisPath for each of the files?

return gulp.src("public/src/**/*.txt")
    .pipe( myFunction( thisPath ) )
    .pipe(gulp.dest("dist"));