refactor: use bzip2-rs instead of bzip2 crate

This avoids a dynamic link dependency with libbz2, which is desirable for
building portable StGit binaries.

Author: jpgrayson

Cargo.lock

@@ -44,14 +44,14 @@ termcolor = "1.1"
 thiserror = "~1.0"
 time = { version = "0.3.21", default-features = false, features = ["local-offset", "formatting", "macros", "parsing"] }
 
-bzip2 = { version = "0.4", optional = true }
+bzip2-rs = { version = "0.1", optional = true }
 curl = { version = "0.4", optional = true }
 flate2 = { version = "1", optional = true }
 tar = { version = "0.4", optional = true }
 
 [features]
 default = ["import-compressed", "import-url"]
-import-compressed = ["dep:bzip2", "dep:flate2", "dep:tar"]
+import-compressed = ["dep:bzip2-rs", "dep:flate2", "dep:tar"]
 import-url = ["dep:curl"]
 
 [profile.for-pkg]

Cargo.toml

@@ -325,7 +325,7 @@ fn import_tgz_series(stack: Stack, matches: &clap::ArgMatches, source_path: &Pat
 #[cfg(feature = "import-compressed")]
 fn import_tbz2_series(stack: Stack, matches: &clap::ArgMatches, source_path: &Path) -> Result<()> {
     let source_file = std::fs::File::open(source_path)?;
-    let mut archive = tar::Archive::new(bzip2::read::BzDecoder::new(source_file));
+    let mut archive = tar::Archive::new(bzip2_rs::DecoderReader::new(source_file));
     let temp_dir = tempfile::tempdir()?;
     archive.unpack(temp_dir.path())?;
     let series_path = find_series_path(temp_dir.path())?;
@@ -494,7 +494,7 @@ fn read_gz(_source_file: std::fs::File, _content: &mut Vec<u8>) -> Result<()> {
 
 #[cfg(feature = "import-compressed")]
 fn read_bz2(source_file: std::fs::File, content: &mut Vec<u8>) -> Result<()> {
-    bzip2::read::BzDecoder::new(source_file).read_to_end(content)?;
+    bzip2_rs::DecoderReader::new(source_file).read_to_end(content)?;
     Ok(())
 }