1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71

//! Utility functions to compression.

use flate2::{write::GzEncoder, Compression};
use std::{
    fs::{self, File},
    io::{self, Write},
    path::{Path, MAIN_SEPARATOR},
};
use tar::Builder;

/// Writes a gunzip encoded tarball to `buf` from entries found in `path`.
pub fn dir<W, P>(buf: W, path: P) -> io::Result<()>
where
    W: Write,
    P: AsRef<Path>,
{
    let mut archive = Builder::new(GzEncoder::new(buf, Compression::best()));
    fn bundle<F>(dir: &Path, f: &mut F, bundle_dir: bool) -> io::Result<()>
    where
        F: FnMut(&Path) -> io::Result<()>,
    {
        if fs::metadata(dir)?.is_dir() {
            if bundle_dir {
                f(dir)?;
            }
            for entry in fs::read_dir(dir)? {
                let entry = entry?;
                if fs::metadata(entry.path())?.is_dir() {
                    bundle(&entry.path(), f, true)?;
                } else {
                    f(entry.path().as_path())?;
                }
            }
        }
        Ok(())
    }

    {
        let path = path.as_ref();
        let base_path = path.canonicalize()?;
        let mut base_path_str = base_path
            .to_str()
            .ok_or_else(|| io::Error::new(io::ErrorKind::InvalidInput, "invalid base path"))?
            .to_owned();
        if let Some(last) = base_path_str.chars().last() {
            if last != MAIN_SEPARATOR {
                base_path_str.push(MAIN_SEPARATOR)
            }
        }

        let mut append = |path: &Path| {
            let canonical = path.canonicalize()?;
            let relativized = canonical
                .to_str()
                .ok_or_else(|| {
                    io::Error::new(io::ErrorKind::InvalidInput, "invalid canonicalized path")
                })?
                .trim_start_matches(&base_path_str[..]);
            if path.is_dir() {
                archive.append_dir(Path::new(relativized), &canonical)?
            } else {
                archive.append_file(Path::new(relativized), &mut File::open(&canonical)?)?
            }
            Ok(())
        };
        bundle(path, &mut append, false)?;
    }
    archive.finish()?;

    Ok(())
}