Handle empty file in get_metadata correctly
#568
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If the `metadata_file_path` exists but the `metadata_file` is empty, `yaml.safe_load(metadata_file)` will return None. But the caller expects a dictionary which can lead to a crash. (e.g. in https://github.com/catkin/catkin_tools/blob/master/catkin_tools/verbs/catkin_build/cli.py#L371)
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Fine with this change for now, though perhaps a better approach if others hit this would be to catch yaml errors and emit a warning. |
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If the
metadata_file_pathexists but themetadata_fileis empty,yaml.safe_load(metadata_file)will return None. But the caller expects a dictionary which can lead to a crash. (e.g. in https://github.com/catkin/catkin_tools/blob/master/catkin_tools/verbs/catkin_build/cli.py#L371)I'm not sure how I ended up with this file being empty (I can't remember touching it)...