You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: builder.rs
    path of file: ./repos/rigos/src
    
    the code of the file until where you have to start completion: use std::{
    fs::{self, read_to_string},
    path,
};

use prettytable::{row, Cell, Row, Table};
use serde::{Deserialize, Serialize};
use tera::Tera;
use toml::value::Datetime;

use crate::utils::{self, get_folder_list, get_path_list, info, read_markdown, Config, Info};

#[derive(Clone)]
pub struct Builder {
    pub config: Config,
    project_root_path: String,
    posts_index: Vec<HpropertyString>,
    tags: Vec<String>,
    categroies: Vec<String>,
    pub pub_folders: Vec<String>,
}

impl Builder {
    pub fn new(project_path: String) -> Builder {
        Builder {
            config: Config::new(format!("{}/config.toml", project_p
    
    pub fn build_feed(&self) {
        let tera = match Tera::new(
            format!(
                "{}/{}/{}/*.html",
                self.project_root_path, self.config.template_dir, self.config.theme
            )
            .as_str(),
        ) {
            Ok(t) => t,
            Err(e) => {
                println!("Parsing error(s): {}", e);
                ::std::process::exit(1);
            }
        };
        let mut context = tera::Context::new();
        context.insert("post_index", &self.posts_index);
        context.insert("tags", &self.tags);
        context.insert("categories", &self.categroies);
        //render
        let rendered = tera.render("feed.html", &context).unwrap();
        //let folder = std::path::Path::new(html_output_path.as_str());
        //let _ = std::fs::create_dir_all(folder);
        let html_output_path = format!("{}/feed.xml", self.config.public_dir);
        std::fs::write(html_output_path, rendered).unwrap();
    }