Added dev script for optimizing images
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Raphaël Doursenaud
parent
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commit
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195
dev/optimize_images.sh
Executable file
195
dev/optimize_images.sh
Executable file
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#!/bin/bash
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# Borrowed from https://gist.github.com/lgiraudel/6065155
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# Inplace mode added by Raphaël Doursenaud <rdoursenaud@gpcsolutions.fr>
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PROGNAME=${0##*/}
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INPUT=''
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QUIET='0'
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NOSTATS='0'
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INPLACE='0'
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max_input_size=0
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max_output_size=0
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usage()
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{
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cat <<EO
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Usage: $PROGNAME [options]
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Script to optimize JPG and PNG images in a directory.
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Options:
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EO
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cat <<EO | column -s\& -t
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-h, --help & shows this help
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-q, --quiet & disables output
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-i, --input [dir] & specify input directory (current directory by default)
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-o, --output [dir] & specify output directory ("output" by default)
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-ns, --no-stats & no stats at the end
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-p, --inplace & optimizes files inplace
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EO
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}
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# $1: input image
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# $2: output image
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optimize_image()
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{
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input_file_size=$(stat -c%s "$1")
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max_input_size=$(expr $max_input_size + $input_file_size)
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if [ "${1##*.}" = "png" ]; then
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optipng -o1 -clobber -quiet $1 -out $2.firstpass
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pngcrush -q -rem alla -reduce $2.firstpass $2 >/dev/null
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rm -fr $2.firstpass
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fi
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if [ "${1##*.}" = "jpg" -o "${1##*.}" = "jpeg" ]; then
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jpegtran -copy none -progressive $1 > $2
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fi
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output_file_size=$(stat -c%s "$2")
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max_output_size=$(expr $max_output_size + $output_file_size)
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}
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get_max_file_length()
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{
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local maxlength=0
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IMAGES=$(find $INPUT -regextype posix-extended -regex '.*\.(jpg|jpeg|png)' | grep -v $OUTPUT)
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for CURRENT_IMAGE in $IMAGES; do
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filename=$(basename "$CURRENT_IMAGE")
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if [[ ${#filename} -gt $maxlength ]]; then
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maxlength=${#filename}
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fi
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done
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echo "$maxlength"
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}
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main()
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{
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# If $INPUT is empty, then we use current directory
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if [[ "$INPUT" == "" ]]; then
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INPUT=$(pwd)
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fi
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# If $OUTPUT is empty, then we use the directory "output" in the current directory
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if [[ "$OUTPUT" == "" ]]; then
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OUTPUT=$(pwd)/output
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fi
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# If inplace, we use /tmp for output
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if [[ "$INPLACE" == "1" ]]; then
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OUTPUT='/tmp/optimize'
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fi
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# We create the output directory
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mkdir -p $OUTPUT
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# To avoid some troubles with filename with spaces, we store the current IFS (Internal File Separator)...
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SAVEIFS=$IFS
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# ...and we set a new one
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IFS=$(echo -en "\n\b")
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max_filelength=`get_max_file_length`
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pad=$(printf '%0.1s' "."{1..600})
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sDone=' [ DONE ]'
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linelength=$(expr $max_filelength + ${#sDone} + 5)
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# Search of all jpg/jpeg/png in $INPUT
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# We remove images from $OUTPUT if $OUTPUT is a subdirectory of $INPUT
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IMAGES=$(find $INPUT -regextype posix-extended -regex '.*\.(jpg|jpeg|png)' | grep -v $OUTPUT)
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if [ "$QUIET" == "0" ]; then
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echo --- Optimizing $INPUT ---
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echo
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fi
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for CURRENT_IMAGE in $IMAGES; do
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filename=$(basename $CURRENT_IMAGE)
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if [ "$QUIET" == "0" ]; then
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printf '%s ' "$filename"
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printf '%*.*s' 0 $((linelength - ${#filename} - ${#sDone} )) "$pad"
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fi
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optimize_image $CURRENT_IMAGE $OUTPUT/$filename
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# Replace file
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if [[ "$INPLACE" == "1" ]]; then
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mv $OUTPUT/$filename $CURRENT_IMAGE
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fi
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if [ "$QUIET" == "0" ]; then
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printf '%s\n' "$sDone"
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fi
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done
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# Cleanup
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if [[ "$INPLACE" == "1" ]]; then
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rm -rf $OUTPUT
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fi
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# we restore the saved IFS
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IFS=$SAVEIFS
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if [ "$NOSTATS" == "0" -a "$QUIET" == "0" ]; then
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echo
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echo "Input: " $(human_readable_filesize $max_input_size)
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echo "Output: " $(human_readable_filesize $max_output_size)
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space_saved=$(expr $max_input_size - $max_output_size)
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echo "Space save: " $(human_readable_filesize $space_saved)
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fi
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}
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human_readable_filesize()
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{
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echo -n $1 | awk 'function human(x) {
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s=" b Kb Mb Gb Tb"
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while (x>=1024 && length(s)>1)
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{x/=1024; s=substr(s,4)}
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s=substr(s,1,4)
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xf=(s==" b ")?"%5d ":"%.2f"
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return sprintf( xf"%s", x, s)
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}
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{gsub(/^[0-9]+/, human($1)); print}'
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}
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SHORTOPTS="h,i:,o:,q,s,p"
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LONGOPTS="help,input:,output:,quiet,no-stats,inplace"
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ARGS=$(getopt -s bash --options $SHORTOPTS --longoptions $LONGOPTS --name $PROGNAME -- "$@")
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eval set -- "$ARGS"
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while true; do
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case $1 in
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-h|--help)
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usage
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exit 0
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;;
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-i|--input)
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shift
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INPUT=$1
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;;
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-o|--output)
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shift
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OUTPUT=$1
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;;
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-q|--quiet)
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QUIET='1'
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;;
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-s|--no-stats)
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NOSTATS='1'
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;;
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-p|--inplace)
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INPLACE='1'
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;;
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--)
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shift
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break
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;;
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*)
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shift
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break
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;;
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esac
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shift
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done
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main
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