git-global 0.1.0

Keep track of all your local git repositories.
Documentation 
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//! The `info` subcommand, which shows meta-information about git-global.

use chrono::Duration;

use std::path::PathBuf;
use std::time::SystemTime;

use core::{GitGlobalConfig, GitGlobalResult, get_repos};
use errors::Result;

/// Get the age of the given file in terms of days, hours, minutes, and seconds.
fn get_age(filename: PathBuf) -> Option<String> {
    filename.metadata().ok()
        .and_then(|metadata| metadata.modified().ok())
        .and_then(|mtime| SystemTime::now().duration_since(mtime).ok())
        .and_then(|dur| Duration::from_std(dur).ok())
        .and_then(|dur| {
            let days = dur.num_days();
            let hours = dur.num_hours() - (days * 24);
            let mins = dur.num_minutes() - (days * 24 * 60) - (hours * 60);
            let secs =  dur.num_seconds() - (days * 24 * 60 * 60) -
                        (hours * 60 * 60) - (mins * 60);
            Some(format!("{}d, {}h, {}m, {}s", days, hours, mins, secs))
        })
}

pub fn get_results() -> Result<GitGlobalResult> {
    let repos = get_repos();
    let mut result = GitGlobalResult::new(&repos);
    let config = GitGlobalConfig::new();
    let version = format!("{}", crate_version!());
    // beginning of underline:   git-global x.x.x
    let mut underline = format!("===========");
    for _ in 0..version.len() {
        underline.push('=');
    }
    result.add_message(format!("git-global {}", version));
    result.add_message(underline);
    result.add_message(format!("Number of repos: {}", repos.len()));
    result.add_message(format!("Base directory: {}", config.basedir));
    result.add_message(format!("Cache file: {}", config.cache_file.to_str().unwrap()));
    if let Some(age) = get_age(config.cache_file) {
        result.add_message(format!("Cache file age: {}", age));
    }
    result.add_message(format!("Ignored patterns:"));
    for pat in config.ignored_patterns.iter() {
        result.add_message(format!("  {}", pat));
    }
    Ok(result)
}