asciicast2gif

#!/usr/bin/env bash

set -e

export DEBUG=${DEBUG:-1}

path_to_self="${BASH_SOURCE[0]}"

# Detect path
if [ -L "$path_to_self" ]; then
    asciicast2gif_dir="$(cd "$(dirname "$path_to_self")"/"$(dirname "$(readlink "$path_to_self")")" && pwd)"
else
    asciicast2gif_dir="$(cd "$(dirname "$path_to_self")" && pwd)"
fi

if ! type "node" >/dev/null 2>&1; then
    echo "error: Node.js not installed? Executable 'node' not found"
    exit 1
fi

if [[ ! -f "${asciicast2gif_dir}/main.js" ]]; then
    echo "error: ${asciicast2gif_dir}/main.js not found. Build it with: lein cljsbuild once main"
    exit 1
fi

if [[ ! -f "${asciicast2gif_dir}/page/page.js" ]]; then
    echo "error: ${asciicast2gif_dir}/page/page.js not found. Build it with: lein cljsbuild once page"
    exit 1
fi

theme="asciinema"
speed=1
scale=2
width=""
height=""

while getopts ":w:h:t:s:S:" opt; do
    case $opt in
        t)
            theme=$OPTARG
            ;;
        s)
            speed=$OPTARG
            ;;
        S)
            scale=$OPTARG
            ;;
        w)
            width=$OPTARG
            ;;
        h)
            height=$OPTARG
            ;;
        \?)
            echo "Invalid option: -$OPTARG" >&2
            exit 1
            ;;
        :)
            echo "Option -$OPTARG requires an argument." >&2
            exit 1
            ;;
    esac
done

shift $((OPTIND-1))

if (($# != 1)); then
    echo "asciicast2gif - Generate GIF animations from asciicasts (asciinema recordings)"
    echo
    echo "usage: asciicast2gif [-t theme] [-s speed] [-S scale] [-w columns] [-h rows] <input-json-path-or-url>"
    echo
    echo "options:"
    echo "  -t <theme>        color theme, one of: asciinema, tango, solarized-dark, solarized-light, monokai (default: asciinema)"
    echo "  -s <speed>        animation speed (default: 1)"
    echo "  -S <scale>        image scale / pixel density (default: 2)"
    echo "  -w <columns>      clip terminal to specified number of columns (width)"
    echo "  -h <rows>         clip terminal to specified number of rows (height)"
    exit 1
fi

if [[ -n $width ]]; then
    export WIDTH=$width
fi

if [[ -n $height ]]; then
    export HEIGHT=$height
fi


case_id=$(basename -s .cast ${1})
tmp_dir=$HOME'/data/playlog/'$case_id
echo tmp_dir:${tmp_dir}

node \
    $NODE_OPTS \
    "${asciicast2gif_dir}/main.js" \
    "${1}" \
    $tmp_dir \
    $theme \
    $speed \
    $scale

python time_process.py $tmp_dir"/tmp.time"

mp4_out_path=$tmp_dir'/result.mp4'
echo out_file:${mp4_out_path}

ffmpeg -f concat -safe 0 -i $tmp_dir'/result.time' -plays 0 $mp4_out_path -y

echo -e "\x1b[32m==> \x1b[0mDone."