fix(bls): keep the Sprout name and version fields outside strict mode

crates/bls/src/lib.rs

@@ -817,20 +817,30 @@ mod tests {
     }
 
     #[test]
-    fn uki_title_and_version_use_every_systemd_fallback() {
+    fn uki_title_and_version_use_every_systemd_fallback_in_strict_mode() {
         let sections = uki_sections(&[(
             ".osrel",
             "IMAGE_ID=img\nNAME=N\nID=i\nVERSION=7.1\nVERSION_ID=7\n",
         )]);
-        let entry = BlsEntry::from_uki(&sections, "/a.efi");
+        let entry = BlsEntry::from_uki_with(&sections, "/a.efi", true);
         assert_eq!(entry.title.as_deref(), Some("img"));
         assert_eq!(entry.version.as_deref(), Some("7.1"));
 
         let sections = uki_sections(&[(".osrel", "NAME=N\nID=i\n")]);
-        assert_eq!(
-            BlsEntry::from_uki(&sections, "/a.efi").title.as_deref(),
-            Some("N")
-        );
+        let entry = BlsEntry::from_uki_with(&sections, "/a.efi", true);
+        assert_eq!(entry.title.as_deref(), Some("N"));
+    }
+
+    #[test]
+    fn uki_title_and_version_keep_the_sprout_fallbacks_outside_strict_mode() {
+        // The long VERSION would be added to the title, so it is not used.
+        let sections = uki_sections(&[(
+            ".osrel",
+            "IMAGE_ID=img\nNAME=N\nID=i\nVERSION=\"24.04 LTS (Noble)\"\nVERSION_ID=7\n",
+        )]);
+        let entry = BlsEntry::from_uki(&sections, "/a.efi");
+        assert_eq!(entry.title.as_deref(), Some("i"));
+        assert_eq!(entry.version.as_deref(), Some("7"));
     }
 
     #[test]

crates/bls/src/uki.rs

@@ -97,10 +97,11 @@ impl BlsEntry {
     }
 
     /// Produces an entry for the unified kernel image at `uki_path`, from its PE `sections`.
-    /// The title comes from `PRETTY_NAME`, `IMAGE_ID`, `NAME`, then `ID`. The version comes from
-    /// `IMAGE_VERSION`, `VERSION`, `VERSION_ID`, then `BUILD_ID`, as in systemd-boot, and then
-    /// from the `.uname` section unless `strict` is set. The sort key comes from `IMAGE_ID`, then
-    /// `ID`. The embedded command line is kept in `cmdline` and not in `options`, as the image
+    /// With `strict`, the title comes from `PRETTY_NAME`, `IMAGE_ID`, `NAME`, then `ID`, and the
+    /// version from `IMAGE_VERSION`, `VERSION`, `VERSION_ID`, then `BUILD_ID`, as in systemd-boot.
+    /// Otherwise the title comes from `PRETTY_NAME`, then `ID`, and the version from
+    /// `IMAGE_VERSION`, `VERSION_ID`, `BUILD_ID`, then the `.uname` section. The sort key comes
+    /// from `IMAGE_ID`, then `ID`. The embedded command line is kept in `cmdline` and not in `options`, as the image
     /// reads its own command line.
     pub fn from_uki_with(
         sections: &BTreeMap<String, Vec<u8>>,
@@ -117,10 +118,22 @@ impl BlsEntry {
                 .map(ToString::to_string)
         };
         let uname = section_text(sections, ".uname");
-        let version = first(&["IMAGE_VERSION", "VERSION", "VERSION_ID", "BUILD_ID"]);
+        // systemd-boot looks at more fields. Outside of strict mode the version is not taken from
+        // VERSION, which is often a long name that would be added to the title.
+        let (title, version) = if strict {
+            (
+                first(&["PRETTY_NAME", "IMAGE_ID", "NAME", "ID"]),
+                first(&["IMAGE_VERSION", "VERSION", "VERSION_ID", "BUILD_ID"]),
+            )
+        } else {
+            (
+                first(&["PRETTY_NAME", "ID"]),
+                first(&["IMAGE_VERSION", "VERSION_ID", "BUILD_ID"]),
+            )
+        };
 
         Self {
-            title: first(&["PRETTY_NAME", "IMAGE_ID", "NAME", "ID"]),
+            title,
             version: version.or_else(|| uname.clone().filter(|_| !strict)),
             sort_key: first(&["IMAGE_ID", "ID"]),
             uki: Some(uki_path.to_string()),