imagemin-cli Example command doesn't work

[sebastiantf]

$ imagemin --plugin.webp.quality=95 --plugin.webp.preset=icon foo.png > foo-icon.webp

This example specified in the docs doesn't seem to work.

It produces the following error:

Unknown plugin: [object Object]

Did you forget to install the plugin?
You can install it with:

  $ npm install -g imagemin-[object Object]

[mattez]

You want to use imagemin webp plugin so you should may be install it imagemin-webp plugin
Related issue is #260

[WangHansen]

I have a similar one:
$ imagemin p12.png --plugin.pngquant.quality={0.1,0.2} > ./images/p12.png

I got:

ArgumentError: (array `options.quality`) Expected `t` to be of type `number` but received type `string`

I believe it has something to do with imagemin-pngquant

[br4nnigan]

I have a similar one:
$ imagemin p12.png --plugin.pngquant.quality={0.1,0.2} > ./images/p12.png

I got:

ArgumentError: (array `options.quality`) Expected `t` to be of type `number` but received type `string`

Wow you actually got that far? I got:

> imagemin test.png --plugin.pngquant.quality={0.1,0.2} > test_opt.png
Unknown plugin: pngquant

And after installing the plugin I got this:

ArgumentError: Expected 'options.quality' to be of type 'array' but received type 'string'

Don't you love it when the most basic shit from the example already fails?

[MolotovCherry]

I got this too. The basic example fails.
imagemin 1.png --plugin.pngquant.quality={0.1,0.2} > 1-test.png

ArgumentError: Expected `options.quality` to be of type `array` but received type `string`
    at u (...\nodejs\node_modules\imagemin-pngquant\node_modules\ow\dist\source\index.js:1:12174)
    at ...\nodejs\node_modules\imagemin-pngquant\index.js:35:3
    at ...\nodejs\node_modules\imagemin-cli\node_modules\p-pipe\index.js:12:25
    at handleFile (...\nodejs\node_modules\imagemin-cli\node_modules\imagemin\index.js:21:54)
    at async ...\nodejs\node_modules\imagemin-cli\node_modules\imagemin\index.js:54:13
    at async Promise.all (index 0)
    at async run (...\nodejs\node_modules\imagemin-cli\cli.js:90:11)
    at async ...\nodejs\node_modules\imagemin-cli\cli.js:122:3

If you take a hint from the error message and use --plugin.pngquant.options.quality={0.1,0.2}, then it works, HOWEVER if you play around with the setting, you'll soon realize that it isn't actually setting the quality and does NOTHING. --plugin=pngquant does just as much. It is broken. :/

[leesei]

For "...but received type `string`" issue, see imagemin/imagemin-cli#28