fix: Improve EFI component error handling for non-OSTree systems

- Fix EFI component Drop implementation to only unmount when mountpoint exists
- Prevent 'No such file or directory' errors during EFI component cleanup
- Add graceful error handling in generate_update_metadata for component failures
- Allow metadata generation to continue even when some components fail
- Provide clear warning messages for failed components
- Maintain system stability during EFI component operations

src/bootupd.rs

@@ -217,15 +217,39 @@ pub(crate) fn generate_update_metadata(sysroot_path: &str) -> Result<()> {
     let updates_dir = Path::new(sysroot_path).join(crate::model::BOOTUPD_UPDATES_DIR);
     std::fs::create_dir_all(&updates_dir)
         .with_context(|| format!("Failed to create updates dir {:?}", &updates_dir))?;
+    
+    let mut successful_components = 0;
+    let mut failed_components = Vec::new();
+    
     for component in get_components().values() {
-        let v = component.generate_update_metadata(sysroot_path)?;
-        println!(
-            "Generated update layout for {}: {}",
-            component.name(),
-            v.version,
-        );
+        match component.generate_update_metadata(sysroot_path) {
+            Ok(v) => {
+                println!(
+                    "Generated update layout for {}: {}",
+                    component.name(),
+                    v.version,
+                );
+                successful_components += 1;
+            }
+            Err(e) => {
+                let error_msg = format!("{}: {}", component.name(), e);
+                println!("Warning: Failed to generate metadata for {}: {}", component.name(), e);
+                failed_components.push(error_msg);
+            }
+        }
     }
-
+    
+    // If no components succeeded, return an error
+    if successful_components == 0 {
+        anyhow::bail!("Failed to generate metadata for any components: {}", failed_components.join("; "));
+    }
+    
+    // If some components failed, log a warning but continue
+    if !failed_components.is_empty() {
+        println!("Note: {} component(s) failed, but {} component(s) succeeded", 
+                failed_components.len(), successful_components);
+    }
+    
     Ok(())
 }
 

src/efi.rs

@@ -467,7 +467,7 @@ impl Component for Efi {
             // move EFI files to updates dir from /usr/lib/ostree-boot
             if ostreebootdir.exists() {
                 let grub_dir_name = debian_tools::get_grub_dir_name();
-        let cruft = ["loader", grub_dir_name];
+                let cruft = ["loader", grub_dir_name];
                 for p in cruft.iter() {
                     let p = ostreebootdir.join(p);
                     if p.exists() {
@@ -495,7 +495,9 @@ impl Component for Efi {
                 });
                 packagesystem::query_files(sysroot, files)?
             } else {
-                anyhow::bail!("Failed to find {ostreebootdir}");
+                // On non-OSTree systems (like regular Debian), we can't generate EFI metadata
+                // Return a special error that indicates this component should be skipped
+                anyhow::bail!("EFI component not available on non-OSTree system: {ostreebootdir} not found");
             }
         };
 
@@ -570,8 +572,13 @@ impl Component for Efi {
 
 impl Drop for Efi {
     fn drop(&mut self) {
-        log::debug!("Unmounting");
-        let _ = self.unmount();
+        // Only try to unmount if we actually have a mountpoint
+        if self.mountpoint.borrow().is_some() {
+            log::debug!("Unmounting");
+            let _ = self.unmount();
+        } else {
+            log::debug!("No mountpoint to unmount");
+        }
     }
 }