support snappy format

Cargo.lock

@@ -454,6 +454,7 @@ dependencies = [
  "parse-display",
  "proptest",
  "rand",
+ "snap",
  "tar",
  "tempfile",
  "test-strategy",
@@ -713,6 +714,12 @@ dependencies = [
  "winapi-util",
 ]
 
+[[package]]
+name = "snap"
+version = "1.0.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "45456094d1983e2ee2a18fdfebce3189fa451699d0502cb8e3b49dba5ba41451"
+
 [[package]]
 name = "strsim"
 version = "0.10.0"

Cargo.toml

@@ -22,6 +22,7 @@ libc = "0.2.103"
 linked-hash-map = "0.5.4"
 lzzzz = "0.8.0"
 once_cell = "1.8.0"
+snap = "1.0.5"
 tar = "0.4.37"
 walkdir = "2.3.2"
 xz2 = "0.1.6"

README.md

@@ -72,11 +72,11 @@ ouch c file.txt file.zip
 
 # Supported formats
 
-| Format    | `.tar` | `.zip` | `.bz`, `.bz2` | `.gz` | `.lz4` | `.xz`, `.lzma` | `.zst` |
+| Format    | `.tar` | `.zip` | `.bz`, `.bz2` | `.gz` | `.lz4` | `.xz`, `.lzma` | `.sz` | `.zst` |
-|:---------:|:------:|:------:|:-------------:|:-----:|:------:|:---------------------:|:------:|
+|:---------:|:------:|:------:|:-------------:|:-----:|:------:|:--------------:|:-----:|:-------|
-| Supported | ✓     | ✓      | ✓            | ✓     | ✓     | ✓                     | ✓     |
+| Supported | ✓      | ✓      | ✓             | ✓     | ✓      | ✓              | ✓     | ✓      |
 
-And the aliases: `tgz`, `tbz`, `tbz2`, `tlz4`, `txz`, `tlz`, `tlzma`, `tzst`.
+And the aliases: `tgz`, `tbz`, `tbz2`, `tlz4`, `txz`, `tlzma`, `tsz`, `tzst`.
 
 Formats can be chained:
 

src/commands.rs

@@ -304,6 +304,7 @@ fn compress_files(files: Vec<PathBuf>, formats: Vec<Extension>, output_file: fs:
             Bzip => Box::new(bzip2::write::BzEncoder::new(encoder, Default::default())),
             Lz4 => Box::new(lzzzz::lz4f::WriteCompressor::new(encoder, Default::default())?),
             Lzma => Box::new(xz2::write::XzEncoder::new(encoder, 6)),
+            Snappy => Box::new(snap::write::FrameEncoder::new(encoder)),
             Zstd => {
                 let zstd_encoder = zstd::stream::write::Encoder::new(encoder, Default::default());
                 // Safety:
@@ -321,7 +322,7 @@ fn compress_files(files: Vec<PathBuf>, formats: Vec<Extension>, output_file: fs:
     }
 
     match formats[0].compression_formats[0] {
-        Gzip | Bzip | Lz4 | Lzma | Zstd => {
+        Gzip | Bzip | Lz4 | Lzma | Snappy | Zstd => {
             let _progress = Progress::new_accessible_aware(
                 total_input_size,
                 precise,
@@ -454,6 +455,7 @@ fn decompress_file(
             Bzip => Box::new(bzip2::read::BzDecoder::new(decoder)),
             Lz4 => Box::new(lzzzz::lz4f::ReadDecompressor::new(decoder)?),
             Lzma => Box::new(xz2::read::XzDecoder::new(decoder)),
+            Snappy => Box::new(snap::read::FrameDecoder::new(decoder)),
             Zstd => Box::new(zstd::stream::Decoder::new(decoder)?),
             Tar | Zip => unreachable!(),
         };
@@ -466,7 +468,7 @@ fn decompress_file(
 
     let files_unpacked;
     match formats[0].compression_formats[0] {
-        Gzip | Bzip | Lz4 | Lzma | Zstd => {
+        Gzip | Bzip | Lz4 | Lzma | Snappy | Zstd => {
             reader = chain_reader_decoder(&formats[0].compression_formats[0], reader)?;
 
             let writer = utils::create_or_ask_overwrite(&output_file_path, question_policy)?;
@@ -580,6 +582,7 @@ fn list_archive_contents(
             Bzip => Box::new(bzip2::read::BzDecoder::new(decoder)),
             Lz4 => Box::new(lzzzz::lz4f::ReadDecompressor::new(decoder)?),
             Lzma => Box::new(xz2::read::XzDecoder::new(decoder)),
+            Snappy => Box::new(snap::read::FrameDecoder::new(decoder)),
             Zstd => Box::new(zstd::stream::Decoder::new(decoder)?),
             Tar | Zip => unreachable!(),
         };
@@ -604,7 +607,7 @@ fn list_archive_contents(
 
             crate::archive::zip::list_archive(zip_archive)?
         }
-        Gzip | Bzip | Lz4 | Lzma | Zstd => {
+        Gzip | Bzip | Lz4 | Lzma | Snappy | Zstd => {
             panic!("Not an archive! This should never happen, if it does, something is wrong with `CompressionFormat::is_archive()`. Please report this error!");
         }
     };

src/extension.rs

@@ -57,7 +57,9 @@ pub enum CompressionFormat {
     Lz4,
     /// .xz .lzma
     Lzma,
-    /// tar, tgz, tbz, tbz2, txz, tlz, tlz4, tlzma, tzst
+    /// .sz
+    Snappy,
+    /// tar, tgz, tbz, tbz2, txz, tlz4, tlzma, tsz, tzst
     Tar,
     /// .zst
     Zstd,
@@ -75,6 +77,7 @@ impl CompressionFormat {
             Bzip => false,
             Lz4 => false,
             Lzma => false,
+            Snappy => false,
             Zstd => false,
         }
     }
@@ -91,6 +94,7 @@ impl fmt::Display for CompressionFormat {
                 Zstd => ".zst",
                 Lz4 => ".lz4",
                 Lzma => ".lz",
+                Snappy => ".sz",
                 Tar => ".tar",
                 Zip => ".zip",
             }
@@ -121,13 +125,15 @@ pub fn separate_known_extensions_from_name(mut path: &Path) -> (&Path, Vec<Exten
             "tgz" => &[Tar, Gzip],
             "tbz" | "tbz2" => &[Tar, Bzip],
             "tlz4" => &[Tar, Lz4],
-            "txz" | "tlz" | "tlzma" => &[Tar, Lzma],
+            "txz" | "tlzma" => &[Tar, Lzma],
+            "tsz" => &[Tar, Snappy],
             "tzst" => &[Tar, Zstd],
             "zip" => &[Zip],
             "bz" | "bz2" => &[Bzip],
             "gz" => &[Gzip],
             "lz4" => &[Lz4],
             "xz" | "lzma" => &[Lzma],
+            "sz" => &[Snappy],
             "zst" => &[Zstd],
             _ => break,
         };

src/utils/fs.rs

@@ -83,6 +83,9 @@ pub fn try_infer_extension(path: &Path) -> Option<Extension> {
     fn is_lz4(buf: &[u8]) -> bool {
         buf.starts_with(&[0x04, 0x22, 0x4D, 0x18])
     }
+    fn is_sz(buf: &[u8]) -> bool {
+        buf.starts_with(&[0xFF, 0x06, 0x00, 0x00, 0x73, 0x4E, 0x61, 0x50, 0x70, 0x59])
+    }
     fn is_zst(buf: &[u8]) -> bool {
         buf.starts_with(&[0x28, 0xB5, 0x2F, 0xFD])
     }
@@ -113,6 +116,8 @@ pub fn try_infer_extension(path: &Path) -> Option<Extension> {
         Some(Extension::new(&[Lzma], "xz"))
     } else if is_lz4(&buf) {
         Some(Extension::new(&[Lz4], "lz4"))
+    } else if is_sz(&buf) {
+        Some(Extension::new(&[Snappy], "sz"))
     } else if is_zst(&buf) {
         Some(Extension::new(&[Zstd], "zst"))
     } else {

tests/integration.rs

@@ -20,8 +20,8 @@ enum DirectoryExtension {
     Tbz,
     Tgz,
     Tlz4,
-    Tlz,
     Tlzma,
+    Tsz,
     Txz,
     Zip,
 }
@@ -35,6 +35,7 @@ enum FileExtension {
     Gz,
     Lz4,
     Lzma,
+    Sz,
     Xz,
 }
 

tests/mime.rs

@@ -17,7 +17,7 @@ fn sanity_check_through_mime() {
     write_random_content(test_file, &mut SmallRng::from_entropy());
 
     let formats = [
-        "tar", "zip", "tar.gz", "tgz", "tbz", "tbz2", "txz", "tlz", "tlzma", "tzst", "tar.bz", "tar.bz2", "tar.lzma",
+        "tar", "zip", "tar.gz", "tgz", "tbz", "tbz2", "txz", "tlzma", "tzst", "tar.bz", "tar.bz2", "tar.lzma",
         "tar.xz", "tar.zst",
     ];
 
@@ -30,7 +30,6 @@ fn sanity_check_through_mime() {
         "application/x-bzip2",
         "application/x-xz",
         "application/x-xz",
-        "application/x-xz",
         "application/zstd",
         "application/x-bzip2",
         "application/x-bzip2",