179 lines
3.0 KiB
Bash
Executable File
179 lines
3.0 KiB
Bash
Executable File
#!/bin/bash
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set -euo pipefail
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usage()
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{
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echo "Usage: $0 [<options>] <file1> <file2>"
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echo
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echo "Options:"
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echo " -h Print this help."
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echo " -c <color> Highlight differences with this color; defaults to red."
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echo " -e Show Exif differences only; don't compare the image data."
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echo " -f <fuzz> Use the specified percentage of fuzz. Defaults to "
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echo " 5% for JPEGs, zero otherwise."
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echo " -n <name> The name to give the first file."
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echo " -N <name> The name to give the second file."
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echo
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}
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color=
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exif_only=false
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fuzz=
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name1=
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name2=
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while getopts "hc:ef:n:N:" opt
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do
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case "$opt" in
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h)
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usage
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exit 0
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;;
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c)
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color="$OPTARG"
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;;
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e)
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exif_only=true
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;;
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f)
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fuzz="$OPTARG"
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;;
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n)
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name1="$OPTARG"
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;;
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N)
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name2="$OPTARG"
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;;
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esac
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done
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shift $(( OPTIND - 1 ))
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if [ -z "${1-}" ] || [ -z "${2-}" ]
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then
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usage
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exit 1
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fi
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f1="$1"
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f2="$2"
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if [[ "$f1" != '/dev/null' ]] && [[ ! -f "$f1" ]]
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then
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echo "$f1: No such file." >&2
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exit 1
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fi
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if [[ "$f2" != '/dev/null' ]] && [[ ! -f "$f2" ]]
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then
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echo "$f2: No such file." >&2
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usage
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exit 1
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fi
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if [[ -z "$name1" ]]
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then
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name1="$f1"
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fi
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if [[ -z "$name2" ]]
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then
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name1="$f2"
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fi
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ext="${name1##*.}"
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if diff "$f1" "$f2" >/dev/null
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then
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exit 0
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fi
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exif()
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{
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if [[ "$1" = /dev/null ]]
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then
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echo /dev/null
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return
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fi
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local b="$(basename "$1")"
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local d="$(mktemp -t "$b.XXXXXX")"
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exiftool "$1" | grep -v 'File Name' | \
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grep -v 'Directory' | \
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grep -v 'ExifTool Version Number' | \
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grep -v 'File Inode Change' | \
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grep -v 'File Access Date/Time' | \
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grep -v 'File Modification Date/Time' | \
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grep -v 'File Permissions' | \
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grep -v 'File Type Extension' \
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>"$d"
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echo "$d"
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}
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diff_clean_names()
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{
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diff -u "$1" --label "$name1" "$2" --label "$name2" || true
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}
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if which exiftool > /dev/null
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then
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d1="$(exif "$f1")"
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d2="$(exif "$f2")"
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diff_clean_names "$d1" "$d2"
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else
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diff_clean_names "$f1" "$f2"
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fi
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if $exif_only
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then
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exit 0
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fi
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if \
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! which compare > /dev/null || \
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! which montage > /dev/null
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then
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echo 'ImageMagick is not installed.' >&2
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exit 1
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fi
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if compare "$f1" "$f2" /dev/null
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then
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exit 0
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fi
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bn="$(basename "$f1")"
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destfile="$(mktemp -t "$bn.XXXXXX").png"
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if [ -z "$fuzz" ] && ( [ "$ext" = "jpeg" ] || [ "$ext" = "jpg" ] )
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then
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fuzz='5'
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fi
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color_flag=
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if [ -n "$color" ]
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then
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color_flag="-highlight-color $color"
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fi
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fuzz_flag=
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if [ -n "$fuzz" ]
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then
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fuzz_flag="-fuzz $fuzz%"
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fi
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compare $color_flag $fuzz_flag "$f1" "$f2" png:- | \
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montage -geometry +4+4 "$f1" - "$f2" png:- >"$destfile" 2>/dev/null || true
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if which xdg-open > /dev/null
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then
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xdg-open "$destfile"
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else
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open "$destfile"
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fi
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