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refactor: unify single-level and multi-level compressor selection
+20
-23
+20
-23
src/main.rs
+20
-23
src/main.rs
···
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let file_name = filename.file_name()?.to_str()?;
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let parts: Vec<&str> = file_name.split('.').collect();
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// Try multi-level detection (e.g., "archive.tar.gz" → [tar, gzip])
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if parts.len() >= 3 {
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// Extensions right-to-left, e.g., ["gz", "tar"]
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let extensions: Vec<&str> = parts[1..].iter().rev().copied().collect();
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if parts.len() < 2 {
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return None;
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}
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// Resolve each extension to a compressor name
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let mut compressor_names: Vec<String> = Vec::new();
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for ext in &extensions {
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if let Some(c) = backends::compressor_from_str(ext) {
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compressor_names.push(c.name().to_string());
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} else {
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compressor_names.clear();
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break;
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}
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// Scan extensions right-to-left, collecting known compressors
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// until hitting an unknown extension or the base name.
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// e.g., "a.b.tar.gz" → gz ✓, tar ✓, b ✗ stop → [gz, tar]
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let mut compressor_names: Vec<String> = Vec::new();
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for ext in parts[1..].iter().rev() {
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if let Some(c) = backends::compressor_from_str(ext) {
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compressor_names.push(c.name().to_string());
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} else {
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break;
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}
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}
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if compressor_names.len() > 1 {
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// Reverse to innermost-to-outermost order for MultiLevelCompressor
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compressor_names.reverse();
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if let Ok(multi) = MultiLevelCompressor::from_names(&compressor_names) {
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return Some(Box::new(multi));
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}
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}
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if compressor_names.is_empty() {
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return None;
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}
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// Single extension fallback
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let ext = parts.last()?;
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backends::compressor_from_str(ext)
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// Reverse to innermost-to-outermost order
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compressor_names.reverse();
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MultiLevelCompressor::from_names(&compressor_names)
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.ok()
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.map(|m| Box::new(m) as Box<dyn Compressor>)
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}
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/// Convert an input path into a Path