Merge pull request #1835 from GPCsolutions/optimize_images

Optimize images

dev/optimize_images.sh

@@ -0,0 +1,195 @@
+#!/bin/bash
+# Borrowed from https://gist.github.com/lgiraudel/6065155
+# Inplace mode added by Raphaël Doursenaud <rdoursenaud@gpcsolutions.fr>
+
+PROGNAME=${0##*/}
+INPUT=''
+QUIET='0'
+NOSTATS='0'
+INPLACE='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
+	-p, --inplace	  & optimizes files inplace
+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.firstpass
+		pngcrush -q -rem alla -reduce $2.firstpass $2 >/dev/null
+		rm -fr $2.firstpass
+	fi
+	if [ "${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=$(pwd)/output
+	fi
+	# If inplace, we use /tmp for output
+	if [[ "$INPLACE" == "1" ]]; then
+		OUTPUT='/tmp/optimize'
+	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
+
+		# Replace file
+		if [[ "$INPLACE" == "1" ]]; then
+			mv $OUTPUT/$filename $CURRENT_IMAGE
+		fi
+
+		if [ "$QUIET" == "0" ]; then
+			printf '%s\n' "$sDone"
+		fi
+	done
+
+	# Cleanup
+	if [[ "$INPLACE" == "1" ]]; then
+		rm -rf $OUTPUT
+	fi
+
+	# we restore the saved IFS
+	IFS=$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($1)); print}'
+}
+
+SHORTOPTS="h,i:,o:,q,s,p"
+LONGOPTS="help,input:,output:,quiet,no-stats,inplace"
+ARGS=$(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'
+			;;
+		-p|--inplace)
+			INPLACE='1'
+			;;
+		--)
+			shift
+			break
+			;;
+		*)
+			shift
+			break
+			;;
+	esac
+	shift
+done
+
+main
+