Resolve a Download URL via CKAN package_search

Fallback for resolve_via_ckan() when the dataset slug has changed. Derives the CKAN portal base URL from the provenance's package_show endpoint, runs a package_search query (from resource$search_query, or derived from the name-match pattern), and returns the URL of the first matching resource, preferring CSV format when specified.

Usage

resolve_via_ckan_search(provenance)

Arguments

provenance

A provenance list as returned by load_provenance(). Uses resource$search_query, resource$name_match_pattern, resource$format, and dataset$ckan_api_endpoint.

Value

The matched resource URL as a character string, or NULL if no query or base URL can be derived, the request fails, or nothing matches.