Hash length placeholder is a problem with postcss

[frederikhors]

This is something related to #45 (comment).

Using [hash] with postcss plugin in Rollup is impossible because it can't create file.

Example

I have this code:

postcss({
  extract: 'bundle.[hash].css' // this creates my css file
}),

which works.

If I use this instead:

postcss({
  extract: 'bundle.[hash:8].css' // this doesn't work
}),

it creates a file named bundle.[hash which is obviously wrong.

So the question:

can we change the placeholder for hash length?

Can we use something like [posthtml-hash-8] ([posthtml-hash-<LENGTH>])?

Thanks for your commitment.

[metonym]

Another solution could be to allow an optional hashLength parameter to be defined by the consumer.

hash({ path: 'public', pattern: '[oh-my-hash]', hashLength: 8 })