# Metadata-only ABI triage so the full build avoids downloading every source.
# Mirrors bincraft::abi_classify rules 1-2; "ambiguous" packages still need a
# source grep via bincraft::needs_per_minor_recompile().

classify_from_metadata <- function(needs_compilation, linking_to, risky_deps) {
  nc <- if (length(needs_compilation) == 0L || is.na(needs_compilation)) {
    ""
  } else {
    tolower(trimws(needs_compilation))
  }
  if (!identical(nc, "yes")) {
    return("not-sensitive")
  }
  lt <- if (length(linking_to) == 0L || is.na(linking_to)) "" else linking_to
  linked <- trimws(unlist(strsplit(lt, "[,\n]")))
  linked <- sub("\\s*\\(.*\\)$", "", linked) # strip "(>= x)" constraints
  linked <- linked[nzchar(linked)]
  if (any(linked %in% risky_deps)) {
    return("sensitive")
  }
  "ambiguous"
}

parse_build_args <- function(args) {
  sensitive_only <- "--sensitive-only" %in% args
  pos <- args[!startsWith(args, "--")]
  list(
    sensitive_only = sensitive_only,
    split_into = as.integer(pos[1L]),
    split_index = as.integer(pos[2L]),
    ncpus = as.integer(pos[3L])
  )
}