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#!/bin/sh
# Compatible with ranger 1.6.0 through 1.7.*
#
# This script searches image files in a directory, opens them all with sxiv and
# sets the first argument to the first image displayed by sxiv.
#
# This is supposed to be used in rifle.conf as a workaround for the fact that
# sxiv takes no file name arguments for the first image, just the number. Copy
# this file somewhere into your $PATH and add this at the top of rifle.conf:
#
# mime ^image, has sxiv, X, flag f = path/to/this/script -- "$@"
#
# Implementation notes: this script is quite slow because of POSIX limitations
# and portability concerns. First calling the shell function 'abspath' is
# quicker than calling 'realpath' because it would fork a whole process, which
# is slow. Second, we need to append a file list to sxiv, which can only be done
# properly in two ways: arrays (which are not POSIX) or \0 sperated
# strings. Unfortunately, assigning \0 to a variable is not POSIX either (will
# not work in dash and others), so we cannot store the result of listfiles to a
# variable.
if [ $# -eq 0 ]; then
echo "Usage: ${0##*/} PICTURES"
exit
fi
[ "$1" == '--' ] && shift
abspath () {
case "$1" in
/*) printf "%s\n" "$1";;
*) printf "%s\n" "$PWD/$1";;
esac
}
listfiles () {
find -L "$(dirname "$target")" -maxdepth 1 -type f -iregex \
'.*\(jpe?g\|bmp\|png\|gif\)$' -print0 | sort -z
}
target="$(abspath "$1")"
count="$(listfiles | grep -m 1 -ZznF "$target" | cut -d: -f1)"
if [ -n "$count" ]; then
listfiles | xargs -0 sxiv -n "$count" --
else
sxiv -- "$@" # fallback
fi
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