loader: include filename in errors

When loading Compose files, if there's an error during YAML parsing
or schema validation, wrap the error to explain what part of loading
it was and the filename.

Signed-off-by: Milas Bowman <[email protected]>

Author: milas

loader/loader.go

@@ -193,7 +193,7 @@ func Load(configDetails types.ConfigDetails, options ...func(*Options)) (*types.
 			}
 			dict, err := parseConfig(file.Content, opts)
 			if err != nil {
-				return nil, err
+				return nil, fmt.Errorf("parsing %s: %w", file.Filename, err)
 			}
 			configDict = dict
 			file.Config = dict
@@ -202,7 +202,7 @@ func Load(configDetails types.ConfigDetails, options ...func(*Options)) (*types.
 
 		if !opts.SkipValidation {
 			if err := schema.Validate(configDict); err != nil {
-				return nil, err
+				return nil, fmt.Errorf("validating %s: %w", file.Filename, err)
 			}
 		}