New upstream version 1.23.0+dfsg1

[rustc.git] / src / tools / tidy / src / bins.rs

// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

//! Tidy check to ensure that there are no binaries checked into the source tree
//! by accident.
//!
//! In the past we've accidentally checked in test binaries and such which add a
//! huge amount of bloat to the git history, so it's good to just ensure we
//! don't do that again :)

use std::path::Path;

// All files are executable on Windows, so just check on Unix
#[cfg(windows)]
pub fn check(_path: &Path, _bad: &mut bool) {}

#[cfg(unix)]
pub fn check(path: &Path, bad: &mut bool) {
    use std::fs;
    use std::io::Read;
    use std::process::{Command, Stdio};
    use std::os::unix::prelude::*;

    if let Ok(mut file) = fs::File::open("/proc/version") {
        let mut contents = String::new();
        file.read_to_string(&mut contents).unwrap();
        // Probably on Windows Linux Subsystem or Docker via VirtualBox,
        // all files will be marked as executable, so skip checking.
        if contents.contains("Microsoft") || contents.contains("boot2docker") {
            return;
        }
    }

    super::walk(path,
                &mut |path| super::filter_dirs(path) || path.ends_with("src/etc"),
                &mut |file| {
        let filename = file.file_name().unwrap().to_string_lossy();
        let extensions = [".py", ".sh"];
        if extensions.iter().any(|e| filename.ends_with(e)) {
            return;
        }

        let metadata = t!(fs::symlink_metadata(&file), &file);
        if metadata.mode() & 0o111 != 0 {
            let rel_path = file.strip_prefix(path).unwrap();
            let git_friendly_path = rel_path.to_str().unwrap().replace("\\", "/");
            let output = Command::new("git")
                .arg("ls-files")
                .arg(&git_friendly_path)
                .current_dir(path)
                .stderr(Stdio::null())
                .output()
                .unwrap_or_else(|e| {
                    panic!("could not run git ls-files: {}", e);
                });
            let path_bytes = rel_path.as_os_str().as_bytes();
            if output.status.success() && output.stdout.starts_with(path_bytes) {
                tidy_error!(bad, "binary checked into source: {}", file.display());
            }
        }
    })
}