use git2::{Repository, StatusOptions, StatusShow};
use std::{collections::HashMap, env};

fn main() {
    let path = env::current_dir().unwrap();
    let repo = Repository::discover(path).unwrap();
    let mut status_opt = StatusOptions::new();
    status_opt
        .show(StatusShow::IndexAndWorkdir)
        .include_untracked(true)
        .include_unmodified(false)
        .no_refresh(false);
    let status_result = repo.statuses(Some(&mut status_opt)).unwrap();

    let mut map: HashMap<git2::Status, u32> = HashMap::new();

    for status_entry in status_result.iter() {
        *map.entry(status_entry.status()).or_insert(0) += 1;
    }
    println!("{:?}", map);
}

M  file_a
AM file_b
A  file_c
?? file_e
?? file_f

$ git status --porcelain | awk -v ORS=", " 'NR>0{arr[$1]++}END{for (a in arr) print a, arr[a]}'
A 1, ?? 2, M 1, AM 1,

{INDEX_NEW: 1, WT_NEW: 2, INDEX_NEW | WT_MODIFIED: 1, INDEX_MODIFIED: 1}

INDEX_NEW                -> A
INDEX_NEW | WT_MODIFIED  -> AM
INDEX_MODIFIED           -> M
WT_NEW                   -> ??