Error out when using -w when writing to stdout

[xiaoosnggao]

I used File Watchers in webstorm to add autoprefixer to suggest an error

postcss-cli、autoprefixer version

What is the reason for that?

[michael-ciniawsky]

- ...-o -w
+ -o path/to/dist -w  

From the screenshot it's seems to be a command line args mismatch and the result is logged to STDOUT atm, because no path is given to -o|--output

postcss $INPUT -u $PLUGINS -o $OUTPUT -w

-w|--watch (Watch Mode) and piping to STDOUT doesn't work and the filter call fails for this reason in the watcher logic

[RyanZim]

We should modify our logic here to error out with a friendly error message.

[xiaoosnggao]

@michael-ciniawsky
Thanks for your prompt, my network storm editor has been successfully configured.
But the editor set file watchers configuration less add autoprefixer, my mac becomes very cardton, I also need to find other ways to optimize, or replace the editor.

[RyanZim]

Reopening to remind me to add an error message.