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Massimo-BMassimo-B
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Integration from old HG repos...
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‎compress_pictures

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#!/usr/bin/env bash
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# vim: set shiftwidth=4 softtabstop=4 expandtab foldlevel=0 foldmethod=indent: # vim-modline, don't delete
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#############################################################################
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# $HGFile: compress_pictures $
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# $HGLocation: /home/mb/src/tools $
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# 1st Author: Massimo
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# Created: 2012-10-24
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# $HGChecked in by: massimo $
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# $HGDate: 2018-01-04 11:30 +0100 $
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version='$HGRevision: 9 $'
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# $HGBranch: $
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# $HGDesc: updates $
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#############################################################################
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# Checking Bash version
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(( ${BASH_VERSINFO[0]} >= 4 )) || die "This script needs at least bash version 4"
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## User Configuration #######################################################
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declare -A conf tmp
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conf[c_nice]="15"
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#############################################################################
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this_basename="${0##*/}"
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this_dirname="${0%/*}"
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usage() {
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cat <<EOF
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This is $0 $version
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Usage: $0 [OPTIONS] <target files>
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Description
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Compressing target picture files.
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By default conversion is only done if new size is lower than original. This can be overridden by --force.
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Options:
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-c, --case Case sensitive, insensitive by default to catch .JPG and .jpg
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-r, --resize <num> Resize to xx, only if bigger ( like convert -resize $numx$num\> )
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-q, --quality <num> convert quality in %
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-k, --keep keep new files and don't overwrite old ones
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-f, --force force conversion and skip checking original size
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-v, --verbose Explain what commands are being run
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-i, --info Show configuration information
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-d, --debug Debugging mode
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-h, --help Show this help
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EOF
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}
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print_config() {
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for key in ${!conf[@]}; do
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printf "%-20s = %s\n" "${key#c_}" "${conf[$key]}"
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done | sort
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}
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while [[ $1 == -* ]]; do
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case "$1" in
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-c|--case) opt_case=1; shift;;
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-r|--resize) shift
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if [[ $1 == -* || -z $1 ]]; then
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die "No resize number given"
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fi
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opt_resize="$1"
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shift;;
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-q|--quality) shift
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if [[ $1 == -* || -z $1 ]]; then
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die "No quality number given"
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fi
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opt_quality="$1"
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shift;;
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-k|--keep) opt_keep=1; shift;;
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-f|--force) opt_force=1; shift;;
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-d|--debug) opt_debug=1; shift;;
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-i|--info) opt_info=1; shift;;
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-v|--verbose) opt_verbose=1; shift;;
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-h|--help|-\?) usage; exit 0;;
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# Trying to pass unkown options to convert:
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-*) opt_unknown="${opt_unknown} ${1}"
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shift
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opt_unknown="${opt_unknown} ${1}"
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shift;;
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esac
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done
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# Libraries
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libs=( output )
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for lib in "${libs[@]}"; do
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lib_path="${BASH_PREFIX:-/}usr/local/lib/lib_$lib"
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if [[ -r lib_$lib ]]; then
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source "lib_$lib"
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continue
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elif [[ -r ${this_dirname}/lib_$lib ]]; then
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source "${this_dirname}/lib_$lib"
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continue
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elif [[ -r "$lib_path" ]]; then
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source "$lib_path"
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continue
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else
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echo "$lib_path not found" 1>&2; exit 1;
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fi
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done
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# Checking for binary
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identify_bin="$(type -P identify)" || die "identify binary not found"
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convert_bin="$(type -P convert)" || die "convert binary not found"
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if [[ -z $1 ]]; then
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error "No target files given!"
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usage
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exit 1
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fi
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[[ -z $opt_case ]] && shopt -s nocaseglob
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shopt -s nullglob
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tmpdir="${this_basename}.$BASHPID"
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mkdir $tmpdir &&
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for file in "$@"; do
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# File checks:
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if [[ ! -f $file ]]; then
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warn "$file not found or not a regular file, skipped."
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continue
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fi
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if [[ ! -r $file ]]; then
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warn "$file is not readable, skipped."
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continue
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fi
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if ! file "$file" |grep JPEG >/dev/null; then
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warn "$file is not a JPEG file, skipped."
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continue
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fi
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file_basename="$(basename "$file")"
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dim=($(identify -ping -format "%w %h" "$file"))
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width="${dim[0]}"
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height="${dim[1]}"
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eval_command="$convert_bin \
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\"${file}\" \
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${opt_verbose:+ -verbose} \
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${opt_quality:+ -quality ${opt_quality}%} \
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${opt_resize:+ -resize ${opt_resize}x${opt_resize}\>} \
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${opt_unkown:+ ${opt_unknown}} \
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\"${tmpdir}/${file_basename}\"
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"
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printf "%s\n=> " "$(identify "$file")"
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if [[ -n $opt_resize ]]; then
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debug "Resizing file: $file, width:$width, height:$height"
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# Only resize if picture is bigger:
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if (( $width > $opt_resize || $height > $opt_resize )) || [[ -n $opt_force ]]; then
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debug "Evaluating $eval_command"
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eval "$eval_command" && [[ -z $opt_keep ]] && printf "<= " && mv -fv "${tmpdir}/${file_basename}" "$file"
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else
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[[ -n $opt_verbose ]] && echo "Skipping $file, already sized."
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fi
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else
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debug "Evaluating $eval_command"
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eval "$eval_command"
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fi
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echo
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done
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if [[ -z $opt_keep ]]; then
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shopt -s nullglob dotglob
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left_tmpfiles=($tmpdir/*)
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if (( ${#left_tmpfiles[*]} )); then
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error "There are temporary files left: ${left_tmpfiles[@]}"
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else
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rmdir -v "$tmpdir"
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fi
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shopt -u nullglob dotglob
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fi
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