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@zx1986 zx1986/optimize.sh forked from lgiraudel/optimize.sh
Created Jul 30, 2013

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#!/bin/bash
PROGNAME=${0##*/}
INPUT=''
QUIET='0'
NOSTATS='0'
max_input_size=0
max_output_size=0
usage()
{
cat <<EO
Usage: $PROGNAME [options]
Script to optimize JPG and PNG images in a directory.
Options:
EO
cat <<EO | column -s\& -t
-h, --help & shows this help
-q, --quiet & disables output
-i, --input [dir] & specify input directory (current directory by default)
-o, --output [dir] & specify output directory ("output" by default)
-ns, --no-stats & no stats at the end
EO
}
# $1: input image
# $2: output image
optimize_image()
{
input_file_size=$(stat -c%s "$1")
max_input_size=$(expr $max_input_size + $input_file_size)
if [ "${1##*.}" = "png" ]; then
optipng -o1 -clobber -quiet $1 -out $2
pngcrush -q -rem alla -reduce $1 $2 >/dev/null
fi
if [ "${1##*.}" = "jpg" -o "${1##*.}" = "jpeg" ]; then
jpegtran -copy none -progressive $1 > $2
fi
output_file_size=$(stat -c%s "$2")
max_output_size=$(expr $max_output_size + $output_file_size)
}
get_max_file_length()
{
local maxlength=0
IMAGES=$(find $INPUT -regextype posix-extended -regex '.*\.(jpg|jpeg|png)' | grep -v $OUTPUT)
for CURRENT_IMAGE in $IMAGES; do
filename=$(basename "$CURRENT_IMAGE")
if [[ ${#filename} -gt $maxlength ]]; then
maxlength=${#filename}
fi
done
echo "$maxlength"
}
main()
{
# If $INPUT is empty, then we use current directory
if [[ "$INPUT" == "" ]]; then
INPUT=$(pwd)
fi
# If $OUTPUT is empty, then we use the directory "output" in the current directory
if [[ "$OUTPUT" == "" ]]; then
OUTPUT=$(pwd)/output
fi
# We create the output directory
mkdir -p $OUTPUT
# To avoid some troubles with filename with spaces, we store the current IFS (Internal File Separator)...
SAVEIFS=$IFS
# ...and we set a new one
IFS=$(echo -en "\n\b")
max_filelength=`get_max_file_length`
pad=$(printf '%0.1s' "."{1..600})
sDone=' [ DONE ]'
linelength=$(expr $max_filelength + ${#sDone} + 5)
# Search of all jpg/jpeg/png in $INPUT
# We remove images from $OUTPUT if $OUTPUT is a subdirectory of $INPUT
IMAGES=$(find $INPUT -regextype posix-extended -regex '.*\.(jpg|jpeg|png)' | grep -v $OUTPUT)
if [ "$QUIET" == "0" ]; then
echo --- Optimizing $INPUT ---
echo
fi
for CURRENT_IMAGE in $IMAGES; do
filename=$(basename $CURRENT_IMAGE)
if [ "$QUIET" == "0" ]; then
printf '%s ' "$filename"
printf '%*.*s' 0 $((linelength - ${#filename} - ${#sDone} )) "$pad"
fi
optimize_image $CURRENT_IMAGE $OUTPUT/$filename
if [ "$QUIET" == "0" ]; then
printf '%s\n' "$sDone"
fi
done
# we restore the saved IFS
IFS=$SAVEIFS
if [ "$NOSTATS" == "0" -a "$QUIET" == "0" ]; then
echo
echo "Input: " $(human_readable_filesize $max_input_size)
echo "Output: " $(human_readable_filesize $max_output_size)
space_saved=$(expr $max_input_size - $max_output_size)
echo "Space save: " $(human_readable_filesize $space_saved)
fi
}
human_readable_filesize()
{
echo -n $1 | awk 'function human(x) {
s=" b Kb Mb Gb Tb"
while (x>=1024 && length(s)>1)
{x/=1024; s=substr(s,4)}
s=substr(s,1,4)
xf=(s==" b ")?"%5d ":"%.2f"
return sprintf( xf"%s", x, s)
}
{gsub(/^[0-9]+/, human($1)); print}'
}
SHORTOPTS="h,i:,o:,q,s"
LONGOPTS="help,input:,output:,quiet,no-stats"
ARGS=$(getopt -s bash --options $SHORTOPTS --longoptions $LONGOPTS --name $PROGNAME -- "$@")
eval set -- "$ARGS"
while true; do
case $1 in
-h|--help)
usage
exit 0
;;
-i|--input)
shift
INPUT=$1
;;
-o|--output)
shift
OUTPUT=$1
;;
-q|--quiet)
QUIET='1'
;;
-s|--no-stats)
NOSTATS='1'
;;
--)
shift
break
;;
*)
shift
break
;;
esac
shift
done
main
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