The R Project SVN R

#! /bin/sh

##

## Rdiff -- Diff 'without R version'

## Usage:

##   R CMD Rdiff from-file to-file exitstatus

## where from-file equal to '-' means STDIN

ffile=${1}

tfile=${2}

exitstatus=${3}

## sed script to get rid of the startup message

script='/^R : Copyright/,/quit R.$/{d;}'

## egrep pattern to get rid of some more???

pattern='(^Number of.*:|^Time |^Loading required package.*'

case "${ffile}" in

  *primitive-funs*)

    pattern=${pattern}'|^\[1\] [19][0-9][0-9])'

    ;;

  *)

    pattern=${pattern}'|^<(environment|promise|pointer): )'

    ;;

esac

if test ${ffile} = '-' ; then

  ffile=''

  bfile=''

else

  if test -f ${ffile} ; then

      bfile=`basename "${ffile}"`

  else

      echo "no valid file ${ffile}"

      exit 1

  fi

fi

tmpfile=${TMPDIR-/tmp}/${bfile}-d.${$}

sed -e "${script}" ${ffile} | ${EGREP} -v "${pattern}" > ${tmpfile}

(sed -e "${script}" ${tfile} | \

  ${EGREP} -v "${pattern}" | \

  diff -bw ${tmpfile} - ) && exitstatus=0

rm -f ${tmpfile}

exit ${exitstatus}