join_mp3

#! /usr/bin/env python3

import json
import shlex
import subprocess as sp
from pathlib import Path
from typing import List

import typer
from rich import print as echo


app = typer.Typer(pretty_exceptions_show_locals=False)


@app.command()
def main(
    files: List[Path],
    outfile: Path = "joined.mp3",
):
    """Join multiple audio files into one."""
    if not files:
        echo("No files to join.")
        raise typer.Exit()

    echo(f'Create "{outfile}" from {len(files)} input files')
    for ii, file in enumerate(files):
        echo(f"  ... {ii+1:03d}: '{file}'")

    cmd = [
        "ffmpeg",
        "-i",
        "concat:" + "|".join(str(f) for f in files),
        "-c",
        "copy",
        str(outfile),
    ]
    echo(" ".join(shlex.quote(arg) for arg in cmd))
    sp.run(cmd, check=True)


if __name__ == "__main__":
    app()