mp3rgain 2.7.0

Lossless MP3 volume adjustment - a modern mp3gain replacement written in Rust
Documentation 
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use colored::*;
use mp3rgain::mp4meta;
use std::path::Path;
use std::time::SystemTime;

use crate::cli::options::{Options, OutputFormat};

pub fn restore_timestamp(file: &Path, mtime: SystemTime) {
    let _ = std::fs::File::options()
        .write(true)
        .open(file)
        .and_then(|f| f.set_times(std::fs::FileTimes::new().set_modified(mtime)));
}

pub fn save_original_mtime(file: &Path, opts: &Options) -> Option<SystemTime> {
    if opts.preserve_timestamp && !opts.dry_run {
        std::fs::metadata(file).ok().and_then(|m| m.modified().ok())
    } else {
        None
    }
}

pub fn warn_aac_multi_track(file: &Path, filename: &str, opts: &Options, dry_run_prefix: &str) {
    if opts.output_format != OutputFormat::Text || opts.quiet {
        return;
    }
    let track_count = mp4meta::count_audio_tracks(file);
    if track_count > 1 {
        eprintln!(
            "  {} {}{} - {} audio tracks detected, processing first track only",
            "!".yellow(),
            dry_run_prefix,
            filename,
            track_count
        );
    }
}