qc-cli 0.5.1

qc is designed to give you an instant breakdown of your codebase composition. It uses Memory Mapping (Mmap) and Parallel Directory Walking to scan tens of thousands of files in milliseconds.
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// src/walk/mod.rs

use crate::result::FileResult;
use crate::result::Lang;
use crossbeam_channel;
use ignore::{WalkBuilder, WalkState};
use indicatif::{ProgressBar, ProgressStyle};
use std::fs;
use std::path::Path;

mod analyze;
mod classify;
mod io;

use analyze::{count_lines, is_binary};
use classify::classify_file;
use io::map_file;

pub fn parallel_scan(root: &str) -> Vec<FileResult> {
    let (tx, rx) = crossbeam_channel::unbounded();

    let pb = ProgressBar::new_spinner().with_style(
        ProgressStyle::default_spinner()
            .template("{spinner:.blue} {msg} [{elapsed_precise}] {pos} files")
            .unwrap(),
    );
    pb.set_message("Auditing");

    WalkBuilder::new(root)
        .hidden(true)
        .git_ignore(true)
        .threads(num_cpus::get())
        .build_parallel()
        .run(|| {
            let tx = tx.clone();
            let pb = pb.clone();
            let mut local_count = 0;

            Box::new(move |entry| {
                let Ok(entry) = entry else {
                    return WalkState::Continue;
                };

                if !entry.file_type().map_or(false, |ft| ft.is_file()) {
                    return WalkState::Continue;
                }

                // Optimization: Get metadata from entry to avoid redundant syscall
                let size = entry.metadata().map(|m| m.len()).unwrap_or(0);

                local_count += 1;
                if local_count >= 500 {
                    pb.inc(500);
                    local_count = 0;
                }

                let result = process_file(entry.path(), size);
                let _ = tx.send(result);

                WalkState::Continue
            })
        });

    pb.finish_with_message("Done");
    drop(tx);
    rx.into_iter().collect()
}

fn process_file(path: &Path, bytes: u64) -> FileResult {
    if bytes == 0 {
        return FileResult {
            path: path.to_path_buf(),
            lang: classify_file(path, &[]),
            code: 0,
            comment: 0,
            blank: 0,
            bytes: 0,
        };
    }

    // Hybrid I/O logic
    if bytes > 16 * 1024 {
        if let Some(mmap) = map_file(path) {
            return analyze_data(path, &mmap, bytes);
        }
    }

    if let Ok(buf) = fs::read(path) {
        return analyze_data(path, &buf, bytes);
    }

    error_result(path, bytes)
}

fn analyze_data(path: &Path, data: &[u8], bytes: u64) -> FileResult {
    if is_binary(data) {
        return binary_result(path, bytes);
    }

    let lang = classify_file(path, data);
    let (code, comment, blank) = count_lines(data, &lang);
    FileResult {
        path: path.to_path_buf(),
        lang,
        code,
        comment,
        blank,
        bytes,
    }
}

fn binary_result(path: &Path, bytes: u64) -> FileResult {
    FileResult {
        path: path.to_path_buf(),
        lang: Lang::NonUtf8,
        code: 0,
        comment: 0,
        blank: 0,
        bytes,
    }
}

fn error_result(path: &Path, bytes: u64) -> FileResult {
    FileResult {
        path: path.to_path_buf(),
        lang: Lang::None,
        code: 0,
        comment: 0,
        blank: 0,
        bytes,
    }
}