I'm manipulating a set of files and I am using gulp-replacer-task to replace the content of processed files with "strings" based on the basename or path of the file currently in the pipe-line.

How do i get at the file's properties currently in the pipe-line ?

```
gulp.task('svgbuild', function() {
    return gulp.src('./src/*.svg')
        .pipe(replace({
          patterns: [
            {
                match:       /STRING_TO_MATCH/g,
                replacement: function() {
                    // how to get the basename of the "file" in the stream;
                    var str = 'file.basename'              
                    // manipulate to get replacement string based on basename
                    var repl = str.toUpperCase()+'-inc'    
                    return repl;
                }
            }
            ]
        }))
});

```