बैश स्क्रिप्ट के साथ छवि अनुकूलन

 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 

 PROGNAME=${0##*/} usage() { cat <<EO Usage: $PROGNAME [options] Script to optimize JPG and PNG images in a directory. Options: EO cat <<EO | column -s\& -t -h, --help & shows this help -q, --quiet & disables output -i, --input [dir] & specify input directory (current directory by default) -o, --output [dir] & specify output directory ("output" by default) -ns, --no-stats & no stats at the end EO } SHORTOPTS="h,i:,o:,q,s" LONGOPTS="help,input:,output:,quiet,no-stats" ARGS=$(getopt -s bash --options $SHORTOPTS --longoptions $LONGOPTS --name $PROGNAME -- "$@") 

 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 } 

 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