git-ward 0.2.0

Proof-before-delete archival for local Git repositories
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use std::path::{Path, PathBuf};
use walkdir::WalkDir;

pub fn format_size(bytes: u64) -> String {
    const KB: u64 = 1024;
    const MB: u64 = KB * 1024;
    const GB: u64 = MB * 1024;
    const TB: u64 = GB * 1024;

    if bytes >= TB {
        format!("{:.1} TB", bytes as f64 / TB as f64)
    } else if bytes >= GB {
        format!("{:.1} GB", bytes as f64 / GB as f64)
    } else if bytes >= MB {
        format!("{:.1} MB", bytes as f64 / MB as f64)
    } else if bytes >= KB {
        format!("{:.1} KB", bytes as f64 / KB as f64)
    } else {
        format!("{bytes} B")
    }
}

pub fn dir_size(path: &Path) -> u64 {
    WalkDir::new(path)
        .into_iter()
        .filter_map(|e| e.ok())
        .filter(|e| e.file_type().is_file())
        .filter_map(|e| e.metadata().ok())
        .map(|m| m.len())
        .sum()
}

pub fn dirs_home() -> PathBuf {
    std::env::var("HOME")
        .map(PathBuf::from)
        .unwrap_or_else(|_| PathBuf::from("/tmp"))
}

pub fn default_projects_path() -> PathBuf {
    dirs_home().join("projects")
}

pub fn ward_home() -> PathBuf {
    dirs_home().join(".ward")
}

pub fn archives_dir() -> PathBuf {
    ward_home().join("archives")
}