Added test code, handled BlockSize error, block size = 16MiB

Signed-off-by: Jonas Frei <freijon@pm.me>

README.md

@@ -178,7 +178,6 @@ Otherwise, you'll need these libraries installed on your system:
 * [libbz2](https://www.sourceware.org/bzip2)
 * [libbz3](https://github.com/kspalaiologos/bzip3)
 * [libz](https://www.zlib.net)
->>>>>>> 066184e (Add support for bzip3)
 
 These should be available in your system's package manager.
 

src/commands/compress.rs

@@ -57,8 +57,8 @@ pub fn compress_files(
                 level.map_or_else(Default::default, |l| bzip2::Compression::new((l as u32).clamp(1, 9))),
             )),
             Bzip3 => Box::new(
-                // Unwrap is safe when using a valid block size
+                // Use block size of 16 MiB
-                bzip3::write::Bz3Encoder::new(encoder, bytesize::ByteSize::mib(5).0 as usize).unwrap(),
+                bzip3::write::Bz3Encoder::new(encoder, 16 * 2_usize.pow(20))?,
             ),
             Lz4 => Box::new(lz4_flex::frame::FrameEncoder::new(encoder).auto_finish()),
             Lzma => Box::new(xz2::write::XzEncoder::new(

src/error.rs

@@ -200,6 +200,18 @@ impl From<std::io::Error> for Error {
     }
 }
 
+impl From<bzip3::Error> for Error {
+    fn from(err: bzip3::Error) -> Self {
+        use bzip3::Error as Bz3Error;
+        match err {
+            Bz3Error::Io(inner) => inner.into(),
+            Bz3Error::BlockSize | Bz3Error::ProcessBlock(_) | Bz3Error::InvalidSignature => {
+                FinalError::with_title("bzip3 error").detail(err.to_string()).into()
+            }
+        }
+    }
+}
+
 impl From<zip::result::ZipError> for Error {
     fn from(err: zip::result::ZipError) -> Self {
         use zip::result::ZipError;

tests/integration.rs

@@ -21,6 +21,7 @@ enum DirectoryExtension {
     Tar,
     Tbz,
     Tbz2,
+    Tbz3,
     Tgz,
     Tlz4,
     Tlzma,
@@ -36,6 +37,7 @@ enum DirectoryExtension {
 enum FileExtension {
     Bz,
     Bz2,
+    Bz3,
     Gz,
     Lz4,
     Lzma,