feat: implement 7zip support for compression and decompression

This also fixes symlink canonicalization for Windows and fixes UI tests on Windows.

Cargo.lock

@@ -827,7 +827,7 @@ dependencies = [
  "clap",
  "clap_complete",
  "clap_mangen",
- "filetime",
+ "filetime_creation",
  "flate2",
  "fs-err",
  "gzp",

Cargo.toml

@@ -15,7 +15,7 @@ atty = "0.2.14"
 bstr = { version = "1.8.0", default-features = false, features = ["std"] }
 bzip2 = "0.4.4"
 clap = { version = "4.4.8", features = ["derive", "env"] }
-filetime = "0.2.22"
+filetime_creation = "0.1"
 flate2 = { version = "1.0.28", default-features = false }
 fs-err = "2.11.0"
 gzp = { version = "0.11.3", default-features = false, features = ["snappy_default"] }

src/archive/sevenz.rs

@@ -1,36 +1,150 @@
 //! SevenZip archive format compress function
-use std::path::{Path, PathBuf};
+use std::{
+    env,
+    fs::File,
+    path::{Path, PathBuf}, io::{Write, Seek, Read},
+};
 
-use crate::utils::strip_cur_dir;
+use same_file::Handle;
 
-pub fn compress_sevenz(files: Vec<PathBuf>, output_path: &Path) -> crate::Result<bool> {
-    let mut writer = sevenz_rust::SevenZWriter::create(output_path).map_err(crate::Error::SevenzipError)?;
+use crate::{
+    info,
+    utils::{self, cd_into_same_dir_as, EscapedPathDisplay, FileVisibilityPolicy, Bytes},
+    warning,
+};
 
-    for filep in files.iter() {
-        writer
-            .push_archive_entry::<std::fs::File>(
-                sevenz_rust::SevenZArchiveEntry::from_path(
-                    filep,
-                    strip_cur_dir(filep)
-                        .as_os_str()
-                        .to_str()
-                        .unwrap()
-                        .to_string(),
-                ),
-                None,
-            )
-            .map_err(crate::Error::SevenzipError)?;
+pub fn compress_sevenz<W>(
+    files: &[PathBuf],
+    output_path: &Path,
+    writer: W,
+    file_visibility_policy: FileVisibilityPolicy,
+    quiet: bool,
+) -> crate::Result<W>
+where
+W: Write + Seek {
+
+    let mut writer = sevenz_rust::SevenZWriter::new(writer).map_err(crate::Error::SevenzipError)?;
+    let output_handle = Handle::from_path(output_path);
+    for filename in files {
+        let previous_location = cd_into_same_dir_as(filename)?;
+
+        // Safe unwrap, input shall be treated before
+        let filename = filename.file_name().unwrap();
+
+        for entry in file_visibility_policy.build_walker(filename) {
+            let entry = entry?;
+            let path = entry.path();
+
+            // If the output_path is the same as the input file, warn the user and skip the input (in order to avoid compression recursion)
+            if let Ok(ref handle) = output_handle {
+                if matches!(Handle::from_path(path), Ok(x) if &x == handle) {
+                    warning!(
+                        "The output file and the input file are the same: `{}`, skipping...",
+                        output_path.display()
+                    );
+                    continue;
+                }
+            }
+
+            // This is printed for every file in `input_filenames` and has
+            // little importance for most users, but would generate lots of
+            // spoken text for users using screen readers, braille displays
+            // and so on
+            if !quiet {
+                info!(inaccessible, "Compressing '{}'.", EscapedPathDisplay::new(path));
+            }
+
+            let metadata = match path.metadata() {
+                Ok(metadata) => metadata,
+                Err(e) => {
+                    if e.kind() == std::io::ErrorKind::NotFound && utils::is_symlink(path) {
+                        // This path is for a broken symlink
+                        // We just ignore it
+                        continue;
+                    }
+                    return Err(e.into());
+                }
+            };
+
+            if metadata.is_dir() {
+                writer
+                    .push_archive_entry::<std::fs::File>(
+                        sevenz_rust::SevenZArchiveEntry::from_path(path, path.to_str().unwrap().to_owned()),
+                        None,
+                    )
+                    .map_err(crate::Error::SevenzipError)?;
+            } else {
+                let reader = File::open(path)?;
+                writer
+                    .push_archive_entry::<std::fs::File>(
+                        sevenz_rust::SevenZArchiveEntry::from_path(path, path.to_str().unwrap().to_owned()),
+                        Some(reader),
+                    )
+                    .map_err(crate::Error::SevenzipError)?;
+            }
+        }
+
+        env::set_current_dir(previous_location)?;
     }
 
-    writer.finish()?;
-    Ok(true)
+    let bytes = writer.finish()?;
+    Ok(bytes)
 }
 
-pub fn decompress_sevenz(input_file_path: &Path, output_path: &Path) -> crate::Result<usize> {
+pub fn decompress_sevenz<R>(reader: R, output_path: &Path, quiet: bool) -> crate::Result<usize> 
+where R: Read+ Seek {
     let mut count: usize = 0;
-    sevenz_rust::decompress_file_with_extract_fn(input_file_path, output_path, |entry, reader, dest| {
+    sevenz_rust::decompress_with_extract_fn(reader, output_path, |entry, reader, dest| {
         count += 1;
-        sevenz_rust::default_entry_extract_fn(entry, reader, dest)
+        // Manually handle writing all files from 7z archive, due to library exluding empty files
+        use std::io::BufWriter;
+
+        use filetime_creation as ft;
+
+        let file_path = output_path.join(entry.name());
+        
+        if entry.is_directory() {
+                // This is printed for every file in the archive and has little
+                // importance for most users, but would generate lots of
+                // spoken text for users using screen readers, braille displays
+                // and so on
+                if !quiet {
+                    info!(inaccessible, "File {} extracted to \"{}\"", entry.name(), file_path.display());
+                }
+            let dir = dest;
+            if !dir.exists() {
+                std::fs::create_dir_all(dir)?;
+            }
+        } else {
+            // same reason is in _is_dir: long, often not needed text
+            if !quiet {
+                info!(
+                    inaccessible,
+                    "{:?} extracted. ({})",
+                    file_path.display(),
+                    Bytes::new(entry.size()),
+                );
+            }
+            let path = dest;
+            path.parent().and_then(|p| {
+                if !p.exists() {
+                    std::fs::create_dir_all(p).ok()
+                } else {
+                    None
+                }
+            });
+            let file = File::create(path)?;
+            let mut writer = BufWriter::new(file);
+            std::io::copy(reader, &mut writer)?;
+            ft::set_file_handle_times(
+                writer.get_ref(),
+                Some(ft::FileTime::from_system_time(entry.access_date().into())),
+                Some(ft::FileTime::from_system_time(entry.last_modified_date().into())),
+                Some(ft::FileTime::from_system_time(entry.creation_date().into())),
+            )
+            .unwrap_or_default();
+        }
+        Ok(true)
     })
     .map_err(crate::Error::SevenzipError)?;
     Ok(count)

src/archive/zip.rs

@@ -10,7 +10,7 @@ use std::{
     thread,
 };
 
-use filetime::{set_file_mtime, FileTime};
+use filetime_creation::{set_file_mtime, FileTime};
 use fs_err as fs;
 use same_file::Handle;
 use time::OffsetDateTime;

src/commands/compress.rs

@@ -13,6 +13,8 @@ use crate::{
     QuestionAction, QuestionPolicy, BUFFER_CAPACITY,
 };
 
+use super::warn_user_about_loading_sevenz_in_memory;
+
 /// Compress files into `output_file`.
 ///
 /// # Arguments:
@@ -127,7 +129,19 @@ pub fn compress_files(
             return Ok(false);
         },
         SevenZip => {
-            archive::sevenz::compress_sevenz(files, output_path)?;
+
+            if !formats.is_empty() {
+                warn_user_about_loading_sevenz_in_memory();
+
+                if !user_wants_to_continue(output_path, question_policy, QuestionAction::Compression)? {
+                    return Ok(false);
+                }
+            }
+
+            let mut vec_buffer = Cursor::new(vec![]);
+            archive::sevenz::compress_sevenz(&files, output_path, &mut vec_buffer, file_visibility_policy, quiet)?;
+            vec_buffer.rewind()?;
+            io::copy(&mut vec_buffer, &mut writer)?;
         }
     }
 

src/commands/decompress.rs

@@ -7,7 +7,7 @@ use std::{
 use fs_err as fs;
 
 use crate::{
-    commands::warn_user_about_loading_zip_in_memory,
+    commands::{warn_user_about_loading_zip_in_memory, warn_user_about_loading_sevenz_in_memory},
     extension::{
         split_first_compression_format,
         CompressionFormat::{self, *},
@@ -165,8 +165,19 @@ pub fn decompress_file(
             }
         },
         SevenZip => {
+            if formats.len() > 1 {
+                warn_user_about_loading_sevenz_in_memory();
+
+                if !user_wants_to_continue(input_file_path, question_policy, QuestionAction::Decompression)? {
+                    return Ok(());
+                }
+            }
+
+            let mut vec = vec![];
+            io::copy(&mut reader, &mut vec)?;
+
             if let ControlFlow::Continue(files) = smart_unpack(
-                |output_dir| crate::archive::sevenz::decompress_sevenz(input_file_path, output_dir),
+                |output_dir| crate::archive::sevenz::decompress_sevenz(io::Cursor::new(vec), output_dir, quiet),
                 output_dir,
                 &output_file_path,
                 question_policy,

src/commands/mod.rs

@@ -31,6 +31,16 @@ fn warn_user_about_loading_zip_in_memory() {
     warning!("{}", ZIP_IN_MEMORY_LIMITATION_WARNING);
 }
 
+/// Warn the user that (de)compressing this .7z archive might freeze their system.
+fn warn_user_about_loading_sevenz_in_memory() {
+    const SEVENZ_IN_MEMORY_LIMITATION_WARNING: &str = "\n\
+        \tThe format '.7z' is limited and cannot be (de)compressed using encoding streams.\n\
+        \tWhen using '.7z' with other formats, (de)compression must be done in-memory\n\
+        \tCareful, you might run out of RAM if the archive is too large!";
+
+    warning!("{}", SEVENZ_IN_MEMORY_LIMITATION_WARNING);
+}
+
 /// This function checks what command needs to be run and performs A LOT of ahead-of-time checks
 /// to assume everything is OK.
 ///

src/main.rs

@@ -22,7 +22,7 @@ use utils::{QuestionAction, QuestionPolicy};
 const BUFFER_CAPACITY: usize = 1024 * 32;
 
 /// Current directory or empty directory
-static CURRENT_DIRECTORY: Lazy<PathBuf> = Lazy::new(|| env::current_dir().unwrap_or_default());
+static CURRENT_DIRECTORY: Lazy<PathBuf> = Lazy::new(|| std::fs::canonicalize(env::current_dir().unwrap_or_default()).unwrap_or_default());
 
 /// The status code returned from `ouch` on error
 pub const EXIT_FAILURE: i32 = libc::EXIT_FAILURE;

tests/ui.rs

@@ -62,8 +62,12 @@ fn ui_test_err_compress_missing_extension() {
     let (_dropper, dir) = testdir().unwrap();
 
     // prepare
+    #[cfg(not(windows))]
     run_in(dir, "touch", "input").unwrap();
 
+    #[cfg(windows)]
+    run_in(dir, "cmd", "/C copy nul input").unwrap();
+
     ui!(run_ouch("ouch compress input output", dir));
 }
 
@@ -71,8 +75,16 @@ fn ui_test_err_compress_missing_extension() {
 fn ui_test_err_decompress_missing_extension() {
     let (_dropper, dir) = testdir().unwrap();
 
+    #[cfg(not(windows))]
     run_in(dir, "touch", "a b.unknown").unwrap();
 
+    #[cfg(windows)]
+    run_in(dir, "cmd", "/C copy nul a").unwrap();
+
+    #[cfg(windows)]
+    run_in(dir, "cmd", "/C copy nul b.unknown").unwrap();
+    
+
     ui!(run_ouch("ouch decompress a", dir));
     ui!(run_ouch("ouch decompress a b.unknown", dir));
     ui!(run_ouch("ouch decompress b.unknown", dir));
@@ -92,8 +104,12 @@ fn ui_test_ok_compress() {
     let (_dropper, dir) = testdir().unwrap();
 
     // prepare
+    #[cfg(not(windows))]
     run_in(dir, "touch", "input").unwrap();
 
+    #[cfg(windows)]
+    run_in(dir, "cmd", "/C copy nul input").unwrap();
+
     ui!(run_ouch("ouch compress input output.zip", dir));
     ui!(run_ouch("ouch compress input output.gz", dir));
 }
@@ -103,6 +119,7 @@ fn ui_test_ok_decompress() {
     let (_dropper, dir) = testdir().unwrap();
 
     // prepare
+    #[cfg(not(windows))]
     run_in(dir, "touch", "input").unwrap();
     run_ouch("ouch compress input output.zst", dir);