Parses an AppStream upstream metadata file.
If file does not exist, g_io_error_not_found will be returned. Other GIOErrors
s and MetadataErrors may be returned as appropriate.
| this |
A valid Metadata instance |
| file |
File for the upstream metadata |
| format |
The format the data is in, or as_format_kind_unknown if not known. |
|
true if the file was parsed without error. |