securegit 0.8.5

Zero-trust git replacement with 12 built-in security scanners, LLM redteam bridge, universal undo, durable backups, and a 50-tool MCP server
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use git2::{Oid, Repository};
use std::path::Path;
use anyhow::Result;

/// Open a git repository, discovering it if necessary.
pub fn open_repo(path: &Path) -> Result<Repository> {
    Ok(Repository::discover(path)?)
}

/// Format a git OID as a short 7-character hex string.
pub fn short_oid(oid: &Oid) -> String {
    let s = oid.to_string();
    s[..7.min(s.len())].to_string()
}

/// Format a git timestamp (seconds + offset) into a human-readable date string.
pub fn format_timestamp(secs: i64, offset_minutes: i32) -> String {
    let local_secs = secs + (offset_minutes as i64) * 60;

    let days_since_epoch = local_secs.div_euclid(86400);
    let time_of_day = local_secs.rem_euclid(86400);
    let hours = time_of_day / 3600;
    let minutes = (time_of_day % 3600) / 60;
    let seconds = time_of_day % 60;

    let mut days = days_since_epoch;
    let mut year = 1970i64;

    loop {
        let days_in_year = if year % 4 == 0 && (year % 100 != 0 || year % 400 == 0) {
            366
        } else {
            365
        };
        if days < days_in_year {
            break;
        }
        days -= days_in_year;
        year += 1;
    }

    let is_leap = year % 4 == 0 && (year % 100 != 0 || year % 400 == 0);
    let month_days = [
        31,
        if is_leap { 29 } else { 28 },
        31,
        30,
        31,
        30,
        31,
        31,
        30,
        31,
        30,
        31,
    ];
    let month_names = [
        "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec",
    ];

    let mut month = 0;
    for (i, &md) in month_days.iter().enumerate() {
        if days < md as i64 {
            month = i;
            break;
        }
        days -= md as i64;
    }

    let offset_sign = if offset_minutes >= 0 { '+' } else { '-' };
    let abs_offset = offset_minutes.unsigned_abs();
    let offset_hours = abs_offset / 60;
    let offset_mins = abs_offset % 60;

    format!(
        "{} {} {} {:02}:{:02}:{:02} {}{:02}{:02}",
        month_names[month],
        days + 1,
        year,
        hours,
        minutes,
        seconds,
        offset_sign,
        offset_hours,
        offset_mins
    )
}