idot

#!/usr/bin/env bash

# stolen in part from https://twitter.com/thingskatedid/status/1316074032379248640

set -euo pipefail

if [ -t 0 ]; then
    has_stdin=f
else
    has_stdin=t
fi

FG=ghostwhite
BG=transparent

# Look for command line flags.
while [ $# -gt 0 ]; do
    case "$1" in
    *)
        if [ -r "$1" ]; then
            has_stdin=f
            dot \
                -Gbgcolor=$BG \
                -Gcolor=$BG \
                -Gbackground=$BG \
                -Ncolor=$FG \
                -Ecolor=$FG \
                -Efontcolor=$FG \
                -Nfontcolor=$FG \
                -Tsvg "$1" | \
            rsvg-convert -z 3 | \
            imgcat
        else
            error "idot: $1: No such file or directory"
            exit 2
        fi
        ;;
    esac
    shift
done

# Read and print stdin
if [ $has_stdin = t ]; then
    dot \
        -Gbgcolor=$BG \
        -Gcolor=$BG \
        -Gbackground=$BG \
        -Ncolor=$FG \
        -Ecolor=$FG \
        -Efontcolor=$FG \
        -Nfontcolor=$FG \
        -Tsvg | \
    rsvg-convert -z 3 | \
    imgcat
fi

exit 0