list packages presenting with status on BBS
pkgs_with_event(af, event = "ERROR", phase = "install", host = "nebbiolo2")
instance of ArtifSet
character(1) one of "ERROR", "WARNINGS", "OK", "skipped", "TIMEOUT"
character(1) one of "install", "buildsrc", "checksrc", "buildbin"
character(1) relevant hostname
af = make_demo_ArtifSet()
#> starting untar...
#> done.
pkgs_with_event(af)
#> [1] package host state
#> <0 rows> (or 0-length row.names)