Once cell compression order

Author: eatradish

oma-refresh/src/config.rs

@@ -5,10 +5,13 @@ use aho_corasick::AhoCorasick;
 #[cfg(feature = "apt")]
 use oma_apt::config::{Config, ConfigTree};
 use oma_fetch::CompressFile;
+use once_cell::sync::OnceCell;
 use tracing::debug;
 
 use crate::{db::RefreshError, inrelease::ChecksumItem};
 
+static COMPRESSION_ORDER: OnceCell<Vec<CompressFileWrapper>> = OnceCell::new();
+
 #[derive(Debug, Eq, PartialEq)]
 struct CompressFileWrapper {
     compress_file: CompressFile,
@@ -55,11 +58,13 @@ impl PartialOrd for CompressFileWrapper {
 impl Ord for CompressFileWrapper {
     fn cmp(&self, other: &Self) -> Ordering {
         let config = Config::new();
-        let t = config
-            .get_compression_types()
-            .iter()
-            .map(|t| CompressFileWrapper::from(t.as_str()))
-            .collect::<Vec<_>>();
+        let t = COMPRESSION_ORDER.get_or_init(|| {
+            config
+                .get_compression_types()
+                .iter()
+                .map(|t| CompressFileWrapper::from(t.as_str()))
+                .collect::<Vec<_>>()
+        });
 
         let self_pos = t.iter().position(|x| x == self).unwrap();
         let other_pos = t.iter().position(|x| x == other).unwrap();
@@ -71,10 +76,12 @@ impl Ord for CompressFileWrapper {
 #[cfg(not(feature = "apt"))]
 impl Ord for CompressFileWrapper {
     fn cmp(&self, other: &Self) -> Ordering {
-        let t = vec!["zst", "xz", "bz2", "lzma", "gz", "lz4"]
-            .into_iter()
-            .map(CompressFileWrapper::from)
-            .collect::<Vec<_>>();
+        let t = COMPRESSION_ORDER.get_or_init(|| {
+            vec!["zst", "xz", "bz2", "lzma", "gz", "lz4", "uncompressed"]
+                .into_iter()
+                .map(CompressFileWrapper::from)
+                .collect::<Vec<_>>()
+        });
 
         let self_pos = t.iter().position(|x| x == self).unwrap();
         let other_pos = t.iter().position(|x| x == other).unwrap();