Load package database

load_pkg_db(lib = NULL, online = TRUE, db = NULL, verbose = TRUE)

Arguments

lib: Local library path. If the value is NA, only remote package database is used.
online: If the value is TRUE, it will directly use the newest package database file from CRAN/Bioconductor. If the value is FALSE, it uses the pre-computated package database on a specific CRAN/Bioconductor snapshot. The version of the pre-computated package database can be set via pkgndep_opt$heaviness_db_version.
db: A pre-computed pkg_db object.
verbose: Whetehr to print messages.

Details

It loads the package database from CRAN/Bioconductor and locally installed packages.

The database object internaly is cached for repeated use of other functions in this package.

Value

A pkg_db class object. See reformat_db for how to use the pkg_db object.

Examples

# \dontrun{
pkg_db = load_pkg_db(lib = NA)
#> retrieve package database from CRAN/Bioconductor (3.16)...
#>   - 22451 remote packages on CRAN/Bioconductor.
#> prepare dependency table...
#> prepare reverse dependency table...
pkg_db
#> A package database of 22451 packages.
#>   - 0 local / 22451 remote packages.
#>   - 18961 CRAN / 3490 Bioconductor / 0 other packages.
# }