fetch: use flexver for file selection

Signed-off-by: NotAShelf <raf@notashelf.dev>
Change-Id: Ia01283a5665ac9497858821f13a7751d6a6a6964

src/fetch.rs

@@ -11,8 +11,8 @@ use tokio::sync::Semaphore;
 
 use crate::{
   error::{PakkerError, Result},
-  model::{Config, LockFile, Project, ProjectFile},
-  utils::verify_hash,
+  model::{Config, LockFile, Project, ProjectFile, UpdateStrategy},
+  utils::{FlexVer, verify_hash},
 };
 
 /// Maximum number of concurrent downloads
@@ -326,18 +326,25 @@ impl Fetcher {
       )));
     }
 
-    // Prefer release over beta over alpha
-    let best = compatible_files
-      .iter()
-      .max_by_key(|f| {
-        let type_priority = match f.release_type {
-          crate::model::ReleaseType::Release => 3,
-          crate::model::ReleaseType::Beta => 2,
-          crate::model::ReleaseType::Alpha => 1,
-        };
-        (type_priority, &f.date_published)
-      })
-      .unwrap();
+    // Select best file based on update strategy
+    let best = if project.update_strategy == UpdateStrategy::FlexVer {
+      let mut sorted: Vec<_> = compatible_files.iter().collect();
+      sorted.sort_by(|a, b| FlexVer(&b.file_name).cmp(&FlexVer(&a.file_name)));
+      *sorted.first().unwrap()
+    } else {
+      // Prefer release over beta over alpha, then by date published
+      compatible_files
+        .iter()
+        .max_by_key(|f| {
+          let type_priority = match f.release_type {
+            crate::model::ReleaseType::Release => 3,
+            crate::model::ReleaseType::Beta => 2,
+            crate::model::ReleaseType::Alpha => 1,
+          };
+          (type_priority, &f.date_published)
+        })
+        .unwrap()
+    };
 
     Ok(best)
   }