build_universe_data: Build scanner data for a package universe
Description
Given a character vector of package names, computes the export
lists, inverted export index, origin map, and version snapshot
needed by scan_usage(). All packages must be installed.
Usage
build_universe_data(packages)
Value
An ascribe_universe object with components:
packages
The input package names.
exports
Named list mapping package names to character
vectors of exported function names (from collect_pkg_funs()).
export_index
Named list mapping function names to
character vectors of packages (from build_export_index()).
origin_map
Environment mapping "pkg::fun" keys
to origin packages (from build_origin_map()).
pkg_versions
Named list mapping package names to version
strings.