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#! /bin/sh
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#! /bin/sh
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##
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##
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## Rdiff -- Diff 'without R version'
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## Rdiff -- diff 'without R version'
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## Copyright (C) 2000-2008 The R Core Development Team.
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## This is free software; see the GNU General Public License version 2
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## or later for copying conditions.  There is NO warranty.
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## Usage:
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## Usage:
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##   R CMD Rdiff from-file to-file exitstatus
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##   R CMD Rdiff from-file to-file exitstatus
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## where from-file equal to '-' means STDIN
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## where from-file equal to '-' means STDIN
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ffile=${1}
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ffile=${1}
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tfile=${2}
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tfile=${2}
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exitstatus=${3}
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exitstatus=${3}
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## These are set in Renviron if run from R CMD
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## 'grep -E' is POSIX, but not AT&T Unix, so not supported
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## by the default grep on Solarix, for example
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EGREP=${EGREP-egrep}
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SED=${SED-sed}
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## sed scripts to get rid of the startup message
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## sed scripts to get rid of the startup message
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scriptold='/^R : Copyright /,/quit R.$/{d;}'
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scriptold='/^R : Copyright /,/quit R.$/{d;}'
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scriptnew='/^R version /,/quit R.$/{d;}'
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scriptnew='/^R version /,/quit R.$/{d;}'
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## turn UTF-8 directional single quotes into ASCII quote
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s1="s/‘/'/g"
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s1="s/‘/'/g"
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s2="s/’/'/g"
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s2="s/’/'/g"
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## egrep pattern to get rid of some more
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## egrep pattern to get rid of some more
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## <= 2.2.x was pattern='(^Number of.*:|^Time |^Loading required package.*'
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## <= 2.2.x was pattern='(^Number of.*:|^Time |^Loading required package.*'
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  fi
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  fi
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fi
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fi
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tmpfile=${TMPDIR-/tmp}/${bfile}-d.${$}
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tmpfile=${TMPDIR-/tmp}/${bfile}-d.${$}
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${SED-sed} -e "${scriptold}" -e "${scriptnew}" -e "${s1}" -e "${s2}" ${ffile} | ${EGREP} -v "${pattern}" > ${tmpfile}
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${SED} -e "${scriptold}" -e "${scriptnew}" -e "${s1}" -e "${s2}" ${ffile} | ${EGREP} -v "${pattern}" > ${tmpfile}
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## some packages ship .Rout.save with CRLF endings
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## some packages ship .Rout.save with CRLF endings
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(tr -d '\r' <  ${tfile} | ${SED-sed} -e "${scriptold}" -e "${scriptnew}" -e "${s1}" -e "${s2}" | \
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(tr -d '\r' <  ${tfile} | ${SED} -e "${scriptold}" -e "${scriptnew}" -e "${s1}" -e "${s2}" | \
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  ${EGREP} -v "${pattern}" | \
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  ${EGREP} -v "${pattern}" | \
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  diff -bw ${tmpfile} - ) && exitstatus=0
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  diff -bw ${tmpfile} - ) && exitstatus=0
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rm -f ${tmpfile}
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rm -f ${tmpfile}
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