Unable to use * to match files?

[Zzzen]

I have many less files in app/styles/less, and I want to compile them and output to 'app/styles/css'. When I using following config, I got an exception:

Error: Unable to write "app/styles/css/*"file (Error code: ENOENT).

        less: {
            development: {
                options: {
                    paths: ['app/styles/css']
                },
                files: {
                    'app/styles/css/': 'app/styles/less/*'
                }
            }
        }

[alampros]

There's a less plugin for this that works great:
https://github.com/just-boris/less-plugin-glob

[geri777]

I am using version 2.15.5. I can use this:

less: {
    options: {
        paths: ['./']
    },
    // target name
    files: {
        expand: true,
        cwd: "./",
        src: ["**/*.less", "!node_modules/**"],
        ext: ".css"
    }       

}

This setting compiles each less file to css.

My problem is (and I think this is a bug) that files named like "styles.new.less" are not compiled to "styles.css" instead to "styles.new.css"