Diagnose implicit dependencies of local packages — diagnose

Scans local packages for references to the recommended packages 'Matrix' and 'class', which can cause R CMD check failures when they are used implicitly but not declared as dependencies.

Usage

diagnose_dependencies(packages, pkg_dir = NULL, ext = ".tar.gz")

Arguments

packages: Character vector. Archive paths or stems to examine, e.g. "conexiones_0.8.3".
pkg_dir: Character. Directory or directories containing local archives (.tar.gz, .zip, etc.).
ext: Character. Archive extension. Defaults to ".tar.gz".

Value

A named list with one entry per local package, each a list with two elements:

matrix_refs: Character vector of references to 'Matrix', with file and line.
class_refs: Character vector of references to 'class', with file and line.

Details

Extracts and scans the R source of each package for patterns that suggest implicit use of 'Matrix' or 'class'. Useful for debugging R CMD check errors such as "there is no package called 'Matrix'" even when the package does not appear to use it directly.

Examples

archives <- system.file("extdata", package = "bigbang")
res <- diagnose_dependencies(
  packages = "toycomponent_0.1.0",
  pkg_dir = archives
)
res[["toycomponent_0.1.0"]]
#> $matrix_refs
#> character(0)
#> 
#> $class_refs
#> character(0)
#> 
lapply(res, function(x) x$matrix_refs)
#> $toycomponent_0.1.0
#> character(0)
#>