git status prompt in zig vs bash

git-status-prompt.sh

#!/bin/bash
# Format 'git status' output for use in my prompt

set -eu

untracked=""
modified=""

for line in $(command git status --porcelain=v1 2> /dev/null | command cut -c-2); do
  if [[ $line == ?? ]]; then
    untracked='?'
  else
    modified='+'
  fi

  if [[ -n $untracked ]] && [[ -n $modified ]]; then
    break
  fi
done

prompt_status="$modified$untracked"

if [[ -n $prompt_status ]]; then
  echo $prompt_status
fi

git-status-prompt.zig

const std = @import("std");

pub fn main() !void {
    const argv = [_][]const u8{
        "git", "status", "--porcelain",
    };
    const stdout = std.io.getStdOut().writer();

    var result = try std.ChildProcess.exec(.{
        .allocator = std.heap.c_allocator,
        .argv = &argv,
    });

    var modified = false;
    var untracked = false;
    var lines = std.mem.split(result.stdout, "\n");

    while (lines.next()) |line| {
        if (std.mem.startsWith(u8, line, "??")) {
            untracked = true;
        } else {
            modified = true;
        }
        if (modified and untracked) {
            break;
        }
    }

    if (modified) {
        try stdout.print("+", .{});
    }
    if (untracked) {
        try stdout.print("?", .{});
    }
}