Added spurious css file

[lombardi-gux]

I have a project, with a structure of

I am running a LESS task which builds 2 css files to /tmp/styles

I then have an autoprefixer task

autoprefixer: {
            options: {
                browsers: ['last 1 version', 'ie 8']
            },

            files: {
                expand: true,
                flatten: true,
                src: 'tmp/styles/{,*/}*.css',
                dest: 'tmp/styles/'
            }
        },

This works. However, if I omit the dest line, it writes one of my CSS files to the project root. Not the map file, and only the live_preview.css file.

I thought omitting that param would just write the processed css back on top of the old css files?

[nDmitry]

Grunt flattens the entire paths and leaves only filenames. Thus, if you have a path tmp/styles/inner/file.css, it will be tmp/styles/file.css when your dest is tmp/styles/ or just file.css when you omit the dest param.

To make it work, just remove expand, flatten and dest.