How do I simply minify 1 file?

I feel like i’m going crazy doing this for hours… all I want to do is literally minify 1 single file for my library. I don’t want modules, injection, or anything like that.

This is what I have so far and I’m getting (!) The emitted file "reset.css" overwrites a previously emitted file of the same name.

  {
    input: 'assets/reset.css',
    plugins: [
      postcss({
        extract: true,
        sourceMap: false,
        minimize: true,
        plugins: [],
      }),
    ],
    output: {
      file: 'dist/reset.css',
    },
  },

[9mm]

Ahhh ok. Thanks! It’s weird rollup can’t just do something simple, I encounter the same thing with webpack. These systems are so immensely advanced and yet… minifying a single file appears to be out of the question.

[FredZeng]

just ignore that warning since u know what ur doing, or u can custom handle the warning.

{
    input: 'assets/reset.css',
    plugins: [
      postcss({
        extract: true,
        modules: false,
        sourceMap: false,
        plugins: [
          require('cssnano')({
            preset: 'default',
          }),
        ],
      }),
    ],
    output: {
      file: 'dist/reset.css',
    },
    onwarn(warning, warn) {
      if (warning.code === 'FILE_NAME_CONFLICT') return
      warn(warning)
    }
  },