totebag 0.9.0

An API for extracting/archiving files and directories in multiple formats.
Documentation 
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
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99

use std::fs::File;
use std::path::{Path, PathBuf};

use sevenz_rust2::{ArchiveEntry, ArchiveWriter, EncoderConfiguration, EncoderMethod};

use crate::archiver::{ArchiveEntry as ToteArchiveEntry, ToteArchiver};
use crate::{Error, Result};

/// 7-Zip format archiver implementation.
///
/// This archiver creates 7z archive files.
pub(super) struct Archiver {}

impl ToteArchiver for Archiver {
    fn perform(
        &self,
        file: File,
        targets: &[PathBuf],
        config: &crate::ArchiveConfig,
    ) -> Result<Vec<ToteArchiveEntry>> {
        let mut w = match ArchiveWriter::new(file) {
            Ok(writer) => writer,
            Err(e) => return Err(Error::Archiver(e.to_string())),
        };
        set_compression_level(&mut w, config.level);
        let mut errs = vec![];
        let mut entries = vec![];
        for tp in targets {
            for t in config.iter(tp) {
                let path = t.into_path();
                entries.push(ToteArchiveEntry::from(&path));
                if path.is_file()
                    && let Err(e) = process_file(&mut w, &path, &config.path_in_archive(&path))
                {
                    errs.push(e);
                }
            }
        }
        if let Err(e) = w.finish() {
            errs.push(Error::Archiver(e.to_string()));
        }
        Error::error_or(entries, errs)
    }

    fn enable(&self) -> bool {
        true
    }
}

fn set_compression_level(szw: &mut ArchiveWriter<File>, level: u8) {
    let method = match level {
        0..=4 => EncoderMethod::LZMA,
        _ => EncoderMethod::LZMA2,
    };
    szw.set_content_methods(vec![EncoderConfiguration::new(method)]);
}

fn process_file(szw: &mut ArchiveWriter<File>, target: &Path, dest_path: &Path) -> Result<()> {
    let name = dest_path.to_string_lossy().into_owned();
    let source = File::open(target).map_err(Error::IO)?;
    szw.push_archive_entry(ArchiveEntry::from_path(dest_path, name), Some(source))
        .map(|_| ())
        .map_err(|e| Error::Archiver(e.to_string()))
}

#[cfg(test)]
mod tests {
    use crate::archiver::test_support::targets;

    fn run_test<F>(f: F)
    where
        F: FnOnce(),
    {
        let result = std::panic::catch_unwind(std::panic::AssertUnwindSafe(f));
        teardown();

        if let Err(err) = result {
            std::panic::resume_unwind(err);
        }
    }

    #[test]
    fn test_sevenz() {
        run_test(|| {
            let config = crate::ArchiveConfig::builder()
                .dest("results/test.7z")
                .overwrite(true)
                .build();
            let v = targets();
            if let Err(e) = crate::archive(&v, &config) {
                panic!("{e:?}");
            }
        });
    }

    fn teardown() {
        let _ = std::fs::remove_file("results/test.7z");
    }
}