Silence metadata loading errors

ChangeLog

@@ -1,5 +1,8 @@
 ChangeLog
 =========
+dev
+    * Silenced errors while parsing metadata from cache and print files
+
 0.2.0alpha1
     * Improve automatic thumbnail and preview selection
     * `sl1s` added as sla extension gcode type

gcode_metadata/metadata.py

@@ -342,13 +342,22 @@ def load(self, save_cache=True):
         """Extract and set metadata from `self.path`. Any metadata
         obtained from the path will be overwritten by metadata from
         the file if the metadata is contained there as well"""
+        cache_loaded = False
         if self.is_cache_fresh():
-            self.load_cache()
-        else:
-            self.load_from_path(self.path)
-            self.load_from_file(self.path)
-            if save_cache:
-                self.save_cache()
+            try:
+                self.load_cache()
+                cache_loaded = True
+            except Exception:  # pylint: disable=broad-except
+                log.warning("Failed loading cache for: %s", self.path)
+        if not cache_loaded:
+            try:
+                self.load_from_path(self.path)
+                self.load_from_file(self.path)
+            except Exception:  # pylint: disable=broad-except
+                log.exception("Failed loading metadata from: %s", self.path)
+            else:
+                if save_cache:
+                    self.save_cache()
 
     def load_from_file(self, path: str):
         """Load metadata and thumbnails from given `path`"""

tests/test_metadata.py

@@ -54,8 +54,8 @@ def give_cache_version(path, version_to_give):
 def test_get_metadata_file_does_not_exist():
     """Test get_metadata() with a non-existing file"""
     fname = '/somehwere/in/the/rainbow/my.gcode'
-    with pytest.raises(FileNotFoundError):
-        get_metadata(fname)
+    metadata = get_metadata(fname)
+    assert not metadata.data
 
 
 def test_save_cache_empty_file():