totty

#!/bin/bash

usage() {
	bin=$(basename $0)
	echo >&2 "Usage: $bin image_path_or_url [path_or_url...]"
	echo >&2 "Usage: TOTTY_X=n $bin ..."
	echo >&2
	echo >&2 "Display image or url in a terminal using img2xterm."
	echo >&2 "Optional TOTTY_X env var allows to"
	echo >&2 " specify terminal width, instead of using stty to get it."
	exit ${1:-0}
}
[[ "$1" = -h || "$1" = --help ]] && usage


dst=/tmp/media.img2tty.png
if [[ -z "$TOTTY_X" ]]
then read tty_rows tty_cols < <(stty size)
else tty_cols=$TOTTY_X
fi
err=0

for p in "$@"; do
	[[ "$p" =~ https?:// ]] && {
		curl -s "$p" >"$dst"\
			|| { echo >&2 "Failed to fetch url: $p"; err=1; continue; }
		p=$dst
	}

	ct=$(file --brief --mime-type "$p")
	[[ "$ct" =~ ^image/ ]]\
		|| { echo >&2 "Unknown content type ($ct): $p"; err=1; continue; }
	[[ "$#" -gt 1 ]] && echo "--- $p"
	convert "$p" -resize "${tty_cols}"x "$dst" && img2xterm "$dst" || err=1
done

rm -f "$dst"
exit $err