A very minimal CSS minifier

cssmin

#!/bin/bash
cat $1 \
  | tr '\r\n' ' ' \
  | perl -pe 's:/\*.*?\*/::g' \
  | sed \
    -e 's/\s\+/ /g' \
    -e 's/\([#\.:]\)\s\?/\1/g' \
    -e 's/\s\?\([;{}]\)\s\?/\1/g' \
    -e 's/\s\?\([,!+~>]\)\s\?/\1/g' \
    -e 's/;}/}/g' \
    -e 's/0\(\.[0-9]\)/\1/g' \
    -e 's/\(background\|outline\|border\(-left\|-right\|-top\|-bottom\)\?\):none\b/\1:0/g' \
    -e 's/}[^{]\+{}/}/g' \
  > $2