paline 0.5.0

一个用 Rust 编写的代码行数统计命令行工具。递归扫描目录，按编程语言统计行数，并以彩色横向条形图在终端中可视化展示。
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// stats.rs
use std::collections::HashMap;

pub struct ProjectStats {
    pub language_line_map: HashMap<String, u32>, // key: language id
    pub total_files: u32,
    pub total_lines: u32,
    pub total_bytes: u64,
}

impl ProjectStats {
    pub fn new() -> Self {
        ProjectStats {
            language_line_map: HashMap::new(),
            total_files: 0,
            total_lines: 0,
            total_bytes: 0,
        }
    }

    pub fn add(&mut self, lang_id: String, lines: u32, bytes: u64) {
        *self.language_line_map.entry(lang_id).or_insert(0) += lines;
        self.total_files += 1;
        self.total_lines += lines;
        self.total_bytes += bytes;
    }

    pub fn merge(&mut self, other: &ProjectStats) {
        for (lang, &lines) in &other.language_line_map {
            *self.language_line_map.entry(lang.clone()).or_insert(0) += lines;
        }
        self.total_files += other.total_files;
        self.total_lines += other.total_lines;
        self.total_bytes += other.total_bytes;
    }
}