Please add support for in-place file compression

[debajit]

I use zopfli for compressing assets before serving them on a CDN.

For a file like app.css, when zopfli compresses it, it creates app.css.gz.

It would be really helpful for many use-cases if we had a command-line option for zopfli that would create the compressed file with the same name. (i.e. app.css)

[CounterPillow]

See #61

Also you can sorta do this with zopflipng -y file file

[lvandeve]

Zopfli takes an uncompressed file and writes to a compressed file (unlike zopflipng which turns a PNG into another PNG), which is why it adds .gz to the filename (similar to the gzip tool). If overwriting the uncompressed file with a compressed file is an interesting use case though, I can look into it. Thanks for the suggestion.

For now, could something like this work? zopfli app.css -c > /tmp/app.css && mv /tmp/app.css app.css, or, zopfli app.css && mv app.css.gz app.css