Simple R script for filtering file names without associated output for my particular setup.

filter_ok.R

#! /usr/bin/env Rscript

input_con  <- file("stdin")
open(input_con)

prevLine <- ""
while (length(curLine <- readLines(con = input_con, 
                                   n = 1, 
                                   warn = FALSE)) > 0) {
  if (length(grep("^/home/[^:]+:$", curLine)) > 0) {
    prevLine <- curLine
  } else if (nchar(prevLine) > 0) {
    if (nchar(curLine) == 0) {
      prevLine <- "" # exlude both from output and reset state
    } else {
      writeLines(c(prevLine, curLine))
      prevLine <- ""
    }
  } else {
    writeLines(curLine)
  }
}

close(input_con)