465 lines
16 KiB
Bash
Executable File
465 lines
16 KiB
Bash
Executable File
#!/bin/bash
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####################################################
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# #
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# Auth: jean-christophe.iacono@1001pharmacies.com #
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# #
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# img-compressr.sh #
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# #
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# Usage: img-compressr.sh <options> #
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# #
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# This script compresses images in target folders #
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# and subfolders using ImageMagick. #
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# #
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# #
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# Version: 0.4 #
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# #
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####################################################
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#
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#
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### Documentation used
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# - ImageMagick install : https://imagemagick.org/script/install-source.php
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# OR apt install. (because manual install means manual plugin management)
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#
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# - PageSpeed Insights : https://developers.google.com/speed/docs/insights/OptimizeImages
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#
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### Notes
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#
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# The purpose of this script is to compress images in a list of folders
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# with potential subfolders.
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#
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# - Script can handle spaces in files or folders names
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#
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# - imagemagick : target and destination files can be the same, this will overwrite file
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# with compressed version
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#
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#
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#
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### TODO
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#
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# - Catch and manage error codes
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# - Set customizable (maxdepth) recursivity
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# - Log path as a variable
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#
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#
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#
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PATH=${PATH:-/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/bin}
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# imagemagick convert binary
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convert=convert
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lastrun_marker=compression_marker
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original_ext=uncompressedbak
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convert_args_jpg="-sampling-factor 4:2:0 -strip -quality 85 -interlace JPEG -colorspace RGB"
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convert_args_png="-strip -define png:compression-filter=0 -define png:compression-level=9 -define png:compression-strategy=1"
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report="/tmp/img_compression_report.log"
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current_time="$(date +"%Y-%m-%d_%H-%M-%S")"
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RED="\033[31m"
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GREEN="\033[32m"
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BLUE="\033[96m"
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YELLOW="\033[93m"
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BRIGHTGREEN="\033[32m\033[1m"
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BRIGHTBLUE="\033[36m\033[1m"
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COLOR_RESET="\033[0m"
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if ! [ -x "$(command -v $convert)" ] ; then
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echo "Imagemagick convert ($convert) is required to execute this script" >> $report
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exit 1
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fi
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function show_help(){
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printf "Script usage :\n"
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printf "\t-b : Backup, copy original images as <imagename>.$original_ext ;\n"
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printf "\t-c : Clean backups, backup copies will be removed ;\n"
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printf "\t-f : Force, ignore last compression timestamp. Will also overwrite backups if combined with -b ;\n"
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printf "\t-r : Recursive, convert images recursively in folder and subfolders ;\n"
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printf "\t-u : Undo, revert to original files (requires backup to be previously created) ;\n"
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printf "\t-v : Verbose, display commands and files being compressed ;\n"
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printf "\t-y : Yes, do not ask for confirmation to begin compression ;\n"
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printf "\n"
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printf "\t-h : this screen.\n"
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printf "\n"
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printf " Examples : $0 -vbr /some/directory \"/directory/with some/spaces\"\n"
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printf " $0 -ryu /some/directory \"/directory/with some/spaces\"\n"
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printf " $0 -cry /some/directory \"/directory/with some/spaces\"\n"
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printf "\n"
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}
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function user_confirmation() {
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if [ "$yes" -eq 0 ] ; then
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read -p "Are you sure you want to proceed ? (y/n) " -n 1 -r
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echo
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if [[ ! $REPLY =~ ^[Yy]$ ]] ; then
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echo "Operation aborted, no change on files" ; exit 0
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fi
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fi
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}
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function clean_backups() {
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user_confirmation
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echo ; echo -e "${BLUE}Cleaning backups...${COLOR_RESET}"
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for target_folder in "$@" ; do
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find "$target_folder" -type f -iname '*.$original_ext' -delete
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done
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echo -e "${BLUE}Cleaning backups ${BRIGHTGREEN}OK${COLOR_RESET}"
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exit 0
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}
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function image_error() {
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error_count=$((error_count+1))
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echo -e "${RED}Error${COLOR_RESET} on file ${YELLOW}$file${COLOR_RESET}, file is ${BLUE}not modified${COLOR_RESET}"
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echo "($1)"
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log_message "error" "$1"
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rm -f "$file.compressed"
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if [ $force -eq 0 ] ; then rm -f "$file.$original_ext" ; fi
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}
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function log_message() {
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echo "[$(date +"%Y/%m/%d-%H:%M:%S")] event=\"$1\" message=\"$2\"" >> $report ### :
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}
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function bytes_to_human() {
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b=${1:-0}; d=''; s=0; S=(Bytes {K,M,G,T,P,E,Z,Y}B)
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while ((b > 1024)); do
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d="$(printf ".%02d" $((b % 1024 * 100 / 1024)))"
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b=$((b / 1024))
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let s++
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done
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echo "$b$d ${S[$s]}"
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}
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### Catching options ###
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script_options="$@" # For logs
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backup=0
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do_clean_backups=0
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force=0
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recursive=0
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undo=0
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verbose=0
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yes=0
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if [ $# -eq 0 ] ; then # If 0 option
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echo "Some options are required" ; echo
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show_help ; exit 1
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fi
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while getopts "bcfruvyh" optName; do
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case "$optName" in
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b) backup=1 ; echo "Backup enabled. A copy of files will be created" ;;
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c) do_clean_backups=1 ; echo "Clean mode, backups in target folders will be removed" ;;
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f) force=1 ; echo "Force enabled. Last compression timestamp will be ignored"
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echo "Note that forcing compression will overwrite any existing backups with current version" ;;
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r) recursive=1 ; echo "Recursivity enabled. Subfolders will be treated" ;;
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u) undo=1 ; echo "Undo mode, original files for target folders will be restored if present" ;;
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v) verbose=1 ; echo "Verbose mode enabled" ;;
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y) yes=1 ; echo "Auto confirmation enabled" ;;
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h) show_help ; exit 0 ;;
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*) echo "Option $1 not recognized" ; show_help ; exit 1 ;;
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esac
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done
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shift "$((OPTIND -1))"
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if [ -z "$1" ] ; then
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echo ; echo "You must specify at least one target directory"
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echo ; show_help ; exit 1
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fi
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if [ $backup -eq 1 ] && [ $undo -eq 1 ] ; then
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echo ; echo "You may not want to backup and undo at the same time"
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echo ; show_help ; exit 1
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fi
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if [ $do_clean_backups -eq 1 ] ; then
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clean_backups "$@"
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fi
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#############
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### START ###
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#############
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# Report definition
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start_time="$current_time"
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#echo "[$(date +"%Y-%m-%d_%H-%M-%S")] Script started. Options: $script_options" >> $report
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echo >> $report
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echo >> $report
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echo >> $report
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#echo "[$current_time] event=\"info\" message=\"Script started. Options: $script_options\"" >> $report
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log_message "info" "Script started."
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log_message "info" "Script options : $script_options"
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[ "$verbose" -eq 1 ] && echo && echo -e "${BLUE}Script started at : $(date)${COLOR_RESET}"
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# Stats : init total
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total_before=0
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total_after=0
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error_count=0
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subfolders_count=0
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### SUBFOLDERS DISCOVERY ###
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# Create the subfolder list
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echo ; echo -e "${BLUE}Listing affected subfolders...${COLOR_RESET}"
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if [ $recursive -eq 0 ] ; then # target folders will be the actual folder list
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subfolders_list="$(find "$@" -maxdepth 0 -type d)"
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else # recursive enabled, get subfolders
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subfolders_list="$(find "$@" -type d)"
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fi
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subfolders_total=$(echo "$subfolders_list" | wc -l)
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# Display and confirm $subfolders_list
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echo "$subfolders_list"
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echo -e "${BLUE}Listing $subfolders_total subfolders ${BRIGHTGREEN}OK${COLOR_RESET}"; echo
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user_confirmation
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### BACKUP RESTORATION ###
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if [ $undo -eq 1 ] ; then # Restore available backups
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restored_count=0
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echo ; echo -e "${BLUE}Restoring available backups in target subfolders...${COLOR_RESET}"
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while IFS="" read -r folder ; do
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subfolders_count=$(($subfolders_count+1))
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echo
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echo
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echo
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echo -e "${BRIGHTBLUE}*** Entering folder ${COLOR_RESET}${YELLOW}$folder ${COLOR_RESET} ${BLUE}($subfolders_count / $subfolders_total)${COLOR_RESET}"
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echo
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echo -e "${BLUE}Restoring files...${COLOR_RESET}"
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while IFS="" read -r file ; do
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if [ -z "$file" ] ; then # list is empty
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echo -e "${BLUE}No new files to restore in this folder${COLOR_RESET}"
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else
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mv "$file" "${file%.$original_ext}"
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[ "$verbose" -eq 1 ] && echo -ne "${BLUE}folder $subfolders_count/$subfolders_total${COLOR_RESET} "
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[ "$verbose" -eq 1 ] && echo -e "File ${YELLOW}${file%.$original_ext}${COLOR_RESET} ${BLUE}restored${COLOR_RESET}"
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restored_count=$(($restored_count+1))
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fi
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done <<< "$(find "$folder" -maxdepth 1 -type f -iname "*.$original_ext")"
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if [ -f "$folder/$lastrun_marker" ] ; then
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echo -e "${BLUE}Removing compression marker${COLOR_RESET}" ; rm "$folder/$lastrun_marker"
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fi
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done <<< "$subfolders_list"
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echo ; echo -e "${BLUE}Cleaning backups ${BRIGHTGREEN}OK${COLOR_RESET}"
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echo -e "${BLUE}$restored_count files restored${COLOR_RESET}" ; echo
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log_message "info" "$restored_count files restored"
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log_message "info" "Script ended."
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exit 0
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fi
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### COMPRESSION ###
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while IFS="" read -r folder ; do
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subfolders_count=$(($subfolders_count+1))
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echo
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echo
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echo
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echo -e "${BRIGHTBLUE}*** Entering folder ${COLOR_RESET}${YELLOW}$folder${COLOR_RESET} ${BLUE}($subfolders_count / $subfolders_total)${COLOR_RESET}"
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### FILE LISTING ###
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echo ; echo -e "${BLUE}Listing files...${COLOR_RESET}"
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# If marker present, use it, unless Force is used
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use_marker=0
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if [ $force -eq 0 ] ; then
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if [ -f "$folder/$lastrun_marker" ] ; then
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use_marker=1 ; [ "$verbose" -eq 1 ] && echo -e "${BLUE}Found marker from last compression, only compressing new files${COLOR_RESET}"
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else
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se_marker=0 ; [ "$verbose" -eq 1 ] && echo -e "${BLUE}No marker found, all files in this folder will be compressed${COLOR_RESET}"
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fi
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else
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use_marker=0 ; [ "$verbose" -eq 1 ] && echo -e "${BLUE}Force used, all files in this folder will be compressed${COLOR_RESET}"
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fi
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# Create files list
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#
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# (Duplicated command here, passing -newer with quotes would make find to not locate the marker)
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#
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if [ $use_marker -eq 0 ] ; then
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# newer_opt=""
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# newer_marker=""
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images_list="$(find "$folder" -maxdepth 1 -type f -iregex '.*\.\(jpe?g\|png\)')"
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else
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# newer_opt="-newer"
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# newer_marker="\"$folder/$lastrun_marker\""
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images_list="$(find "$folder" -maxdepth 1 -type f -newer "$folder/$lastrun_marker" -iregex '.*\.\(jpe?g\|png\)')"
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fi
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[ "$verbose" -eq 1 ] && echo -e "${BLUE}command : ${GREEN}find $folder -maxdepth 1 -type f $newer_opt $newer_marker -iregex \'.*\.\(jpe?g\|png\)\'${COLOR_RESET}"
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# images_list="$(find "$folder" -maxdepth 1 -type f $newer_opt $newer_marker -iregex '.*\.\(jpe?g\|png\)')"
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images_total=$(echo "$images_list" | wc -l)
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images_count=0
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### FILE COMPRESSION ###
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[ "$verbose" -eq 1 ] && echo ; echo -e "${BLUE}Converting files...${COLOR_RESET}"
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[ "$verbose" -eq 1 ] && echo -e "${BLUE}command : ${GREEN}$convert $convert_args <src> <dst>${COLOR_RESET}"
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if [ -z "$images_list" ] ; then # list is empty
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echo -e "${BLUE}No new files to compress in this folder${COLOR_RESET}"
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else
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# Initialization of folder statistics
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folder_before=0
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folder_after=0
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while IFS="" read -r file ; do
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images_count=$(($images_count+1))
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# Stats before
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size_before=$(stat -c%s "$file")
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if [ "$size_before" -eq 0 ] ; then
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image_error "File $file has a size of 0" ; continue
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fi
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# Display count as output prefix
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[ "$verbose" -eq 1 ] && echo -ne "${BLUE}folder $subfolders_count/$subfolders_total ; image $images_count/$images_total)${COLOR_RESET} "
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file_type="$(file -b "$file" | awk '{print $1}')"
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if [ $file_type == "very" ] ; then file_type="very small or empty" ; fi
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case $file_type in
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[jJ][pP][gG] | [jJ][pP][eE][gG])
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convert_args="$convert_args_jpg" ;;
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[pP][nN][gG])
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convert_args="$convert_args_png" ;;
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*)
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image_error "File $file has an unexpected filetype : $file_type" ; continue ;;
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esac
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$convert $convert_args "$file" "$file.compressed" 2>>$report
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if [ ! $? -eq 0 ] ; then
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image_error "Compression failed for $file" ; continue
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else
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# Stats
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size_after=$(stat -c%s "$file.compressed")
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variation=$(awk -v after="$size_after" -v before="$size_before" 'BEGIN {print int(((after*100)/before)-100)}')
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folder_before=$(( $folder_before + $size_before ))
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total_before=$(( $total_before + $size_before ))
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if [ "$variation" -ge 0 ] ; then
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# No improvement, do not keep.
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rm -f "$file.compressed"
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if [ $force -eq 0 ] ; then rm -f "$file.$original_ext" ; fi
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# Stats update
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folder_after=$(( $folder_after + $size_before ))
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total_after=$(( $total_after + $size_before ))
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[ "$verbose" -eq 1 ] && echo -e "File ${YELLOW}$file${COLOR_RESET} would increase by $variation %, file is ${BLUE}not modified${COLOR_RESET}"
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else
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# Create / overwrite backup (unless force used && backup already present)
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if [ $backup -eq 1 ] ; then
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if [ $force -eq 0 ] || [[ $force -eq 1 && ! -f "$file.$original_ext" ]] ; then
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cp -a "$file" "$file.$original_ext"
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fi
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fi
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# Replace
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mv "$file.compressed" "$file"
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# Stats update
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folder_after=$(( $folder_after + $size_after ))
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total_after=$(( $total_after + $size_after ))
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[ "$verbose" -eq 1 ] && echo -e "File ${YELLOW}$file${COLOR_RESET} ${GREEN}decreased${COLOR_RESET} from $(bytes_to_human $size_before) to $(bytes_to_human $size_after), by ${GREEN}$variation %${COLOR_RESET}"
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fi
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fi
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done <<< "$images_list"
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echo -e "${BLUE}Compression ${BRIGHTGREEN}OK${COLOR_RESET}"
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# Stats for this folder
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echo
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[ "$verbose" -eq 1 ] && echo -e "${BLUE}Folder${COLOR_RESET} ${YELLOW}$folder ${BLUE}complete.${COLOR_RESET}"
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echo -e "${BLUE}Initial size${COLOR_RESET} : $(bytes_to_human $folder_before)"
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echo -e "${BLUE}Compressed size${COLOR_RESET} : $(bytes_to_human $folder_after)"
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folder_variation=$(awk -v after="$folder_after" -v before="$folder_before" 'BEGIN {print int(((after*100)/before)-100)}')
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if [ $folder_after -gt $folder_before ] ; then
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echo -e "${BLUE}Folder compression gain : ${RED}$folder_variation %${COLOR_RESET}"
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else
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echo -e "${BLUE}Folder compression gain : ${GREEN}$folder_variation %${COLOR_RESET}"
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fi
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# Test success with exit code ?
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[ "$verbose" -eq 1 ] && echo -e "${BLUE}Success, generating compression marker...${COLOR_RESET}"
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echo "Success" > "$folder/$lastrun_marker"
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fi
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done <<< "$subfolders_list"
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# Total stats
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echo ; echo ; echo ; echo -e "${BRIGHTBLUE}*** Compression complete ! ***${COLOR_RESET}"
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if [ $total_before -eq 0 ] ; then
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echo -e "${BLUE}No file were modified.${COLOR_RESET}"
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log_message "info" "No file were modified."
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else
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echo -e "${BLUE}Total initial size :${COLOR_RESET} $(bytes_to_human $total_before)"
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log_message "info" "Total initial size : $(bytes_to_human $total_before)"
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echo -e "${BLUE}Total compressed size :${COLOR_RESET} $(bytes_to_human $total_after)"
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log_message "info" "Total compressed size : $(bytes_to_human $total_after)"
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total_variation=$(awk -v after="$total_after" -v before="$total_before" 'BEGIN {print int(((after*100)/before)-100)}')
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if [ $total_after -gt $total_before ] ; then
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echo -e "${BLUE}Total compression gain : ${RED}$total_variation %${COLOR_RESET}"
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else
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echo -e "${BLUE}Total compression gain : ${GREEN}$total_variation %${COLOR_RESET}"
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fi
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log_message "info" "Total compression gain : $total_variation %"
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fi
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if [ $error_count -gt 0 ] ; then
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echo -e "${BLUE}$error_count errors during execution, check $report for details${COLOR_RESET}"
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log_message "info" "$error_count errors during execution, check $report for details"
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fi
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echo
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echo
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echo -e "${BLUE}Script ended at : $(date)${COLOR_RESET}"
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log_message "info" "Script ended."
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echo
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