import_gtfs()would append a
.txtextension to non text files found inside the GTFS feed, which would lead to an error when attempting to unzip the feed. The function now ignores non text files when reading feeds, and raises an informative warning message if any of such files is found (#23).
gtfsio_error()function, which raises a custom-classed error condition. All errors raised in gtfsio’s exported functions inherit from
<function_name>_error, which allows for easier and more clear error catching.
check_fields_exist()was substituted by
check_field_exists()). This shouldn’t raise reverse dependencies concern, because as of now only gtfstools dev version uses such functions, which is an easy fix that doesn’t concern CRAN release.