### Print the flat-slot objects recorded as unable to load under some R minor.
#
# Usage: Rscript local/list-unsafe-flat-objects.R <arch> <codename>
#
# Prints one `<package> <version>` per line, for a caller that rebuilds each
# under every installed R minor.
#
# The verdicts come from `abi_flat_safety`, written by the flat-safety backfill
# from the binaries themselves: an object is unsafe when it references a symbol
# some supported minor does not export. That is the authoritative list of what
# needs a per-minor build, and it replaces the ad-hoc symbol scans that produced
# earlier repair lists.

options(error = function() {
  cat("ERROR:", geterrmessage(), "\n", file = stdout())
  q(status = 1)
})

args <- commandArgs(trailingOnly = TRUE)
if (length(args) < 2L) {
  stop("usage: list-unsafe-flat-objects.R <arch> <codename>", call. = FALSE)
}
arch <- args[[1L]]
codename <- args[[2L]]

con <- DBI::dbConnect(
  RPostgres::Postgres(),
  dbname = "build_metadata",
  host = "r-binaries.devxy.io",
  port = 15432L,
  user = "rpkgs",
  password = Sys.getenv("PGPASS"),
  sslmode = "require"
)
on.exit(try(DBI::dbDisconnect(con), silent = TRUE), add = TRUE)

rows <- DBI::dbGetQuery(
  con,
  paste0(
    "SELECT package, version FROM abi_flat_safety ",
    "WHERE NOT safe AND codename = $1 AND arch = $2 ",
    "ORDER BY package, version"
  ),
  params = list(codename, arch)
)

# An empty result is ambiguous: either nothing is unsafe, or the backfill never
# ran for this slot. Say which, rather than let the caller read silence as done.
if (nrow(rows) == 0L) {
  total <- DBI::dbGetQuery(
    con,
    "SELECT count(*) AS n FROM abi_flat_safety WHERE codename = $1 AND arch = $2",
    params = list(codename, arch)
  )$n[[1L]]
  if (total == 0L) {
    stop(
      sprintf(
        "No verdicts recorded for %s/%s at all. Run the flat-safety backfill first; an empty repair list here would look like success.", # nolint
        arch,
        codename
      ),
      call. = FALSE
    )
  }
  message(sprintf(
    "%s/%s: %d objects recorded, none unsafe. Nothing to repair.",
    arch,
    codename,
    total
  ))
  quit(status = 0)
}

message(sprintf(
  "%s/%s: %d objects need a per-minor build",
  arch,
  codename,
  nrow(rows)
))
cat(sprintf("%s %s", rows$package, rows$version), sep = "\n")