Bash scripts for replacing annoying rendering status with animated one when rendering Blender using command-line #snippet

render-blender.sh

#!/bin/bash
function render-blender() {
    function write-usage() {
        echo "Usage: $0 -i input-path [-o output-file] [-e engine-name]"
        echo "  -i | --input-file    Path to input file"
        echo "  -o | --output-file   Path to output file"
        echo "  -e | --engine        Render engine name"
        echo ""
        echo "Example: $0 -i $HOME/File.blend -o $HOME/Sample_ -e CYCLES"
        exit 1
    }

    if [[ ! "$1" ]]; then write-usage; fi

    while [[ "$#" > 0 ]]; do
        case $1 in
        -i | --input-file)
            input_file="$2"
            shift
            shift
            ;;
        -o | --output-file)
            output_file="$2"
            shift
            shift
            ;;
        -e | --engine)
            engine="$2"
            shift
            shift
            ;;
        *)
            echo "Unknown parameter passed: $1"
            exit 1
            ;;
        esac
    done

    if [ -z "$input_file" ]; then write-usage; fi
    if [ -z "$output_file" ]; then output_file="//Render_#"; fi
    if [ -z "$engine" ]; then engine="BLENDER_EEVEE"; fi

    PARAMS=(
        $input_file
        --background
        --render-output $output_file
        --engine $engine
        --render-format PNG
        --use-extension 1
        --render-frame 1
    )
    clear_before=false
    term_width=$(tput cols)
    blender ${PARAMS[@]} | {
        while IFS= read -r line; do
            if [[ "$clear_before" == true ]]; then
                for (( i=1; i<=$(($length / $term_width + 1)); i++ )); do
                    tput cuu 1
                    tput el
                done
            fi

            if [[ $line =~ ^Fra: && ! $line =~ Finished$|La:0$ ]]; then
                clear_before=true
                length=${#line}
            else
                clear_before=false
            fi
            echo $line
        done
    }
}