#! /usr/bin/env Rscript
pkgdiff <- function(from, to)
{
    clean <- function(txt)
    {
        txt <- grep("^(\\* using R|Time) ", txt, invert = TRUE, value = TRUE, useBytes=TRUE)
        txt <- grep("^\\* (using|used) (C|Fortran)", txt, invert = TRUE, value = TRUE)
        txt <- grep("^\\* running under:", txt, invert = TRUE, value = TRUE)
        txt <- grep("^(\\* R was compiled| *gcc| *clang| *GNU Fortran)", txt, invert = TRUE, value = TRUE)
        gsub(" \\[[0-9]+[sm]/[0-9]+[sm]\\]", "", txt)
    }

    left <- clean(readLines(from, warn = FALSE))
    right <- clean(readLines(to, warn = FALSE))
    if(length(left) != length(right) || !all(left == right)) {
        cat("\n*** ", from, "\n", sep="")
        writeLines(left, a <- tempfile("Rdiffa"))
        writeLines(right, b <- tempfile("Rdiffb"))
        system(paste("diff -bw", shQuote(a), shQuote(b)))
    }
}

l1 <- Sys.glob("*.out")
l2 <- Sys.glob("../tests-vg-keep/*.out")
l3 <- basename(l2)
options(stringsAsFactors = FALSE)
m <- merge(data.frame(x=l1), data.frame(x=l3, y=l2))[,1]
mm <- lapply(m, function(x) pkgdiff(x, file.path("../tests-vg-keep", x)))